| /* MEGA65 45GS02 backend for vbcc |
| (c) Volker Barthelmann 2020 |
| (c) Paul Gardner-Stephen 2020 |
| |
| */ |
| |
| #include "supp.h" |
| #include "vbc.h" |
| |
| #include <math.h> |
| |
| static char FILE_[]=__FILE__; |
| |
| /* Public data that MUST be there. */ |
| |
| /* Name and copyright. */ |
| char cg_copyright[]="vbcc 45GS02 (MEGA65) code-generator V0.1 (c) in 2020 by Volker Barthelmann, Paul Gardner-Stephen"; |
| |
| /* Commandline-flags the code-generator accepts: |
| 0: just a flag |
| VALFLAG: a value must be specified |
| STRINGFLAG: a string can be specified |
| FUNCFLAG: a function will be called |
| apart from FUNCFLAG, all other versions can only be specified once */ |
| int g_flags[MAXGF]={0,0, |
| VALFLAG,0,0, |
| 0,0, |
| VALFLAG,VALFLAG,0,0, |
| VALFLAG,0,0,0, |
| 0,0,0, |
| 0}; |
| |
| /* the flag-name, do not use names beginning with l, L, I, D or U, because |
| they collide with the frontend */ |
| char *g_flags_name[MAXGF]={"std-syntax","no-rax", |
| "volatile-regs","ieee","no-peephole", |
| "cbmascii","softstack", |
| "reg-args","int-args","mainargs","no-bank-vars", |
| "common-banknr","btmp-zpage","oldfp","large", |
| "glob-acc","avoid-bank-switch","manual-banking", |
| "atascii","65c02"}; |
| |
| /* the results of parsing the command-line-flags will be stored here */ |
| union ppi g_flags_val[MAXGF]; |
| |
| /* Alignment-requirements for all types in bytes. */ |
| zmax align[MAX_TYPE+1]; |
| |
| /* Alignment that is sufficient for every object. */ |
| zmax maxalign; |
| |
| /* CHAR_BIT for the target machine. */ |
| zmax char_bit; |
| |
| /* sizes of the basic types (in bytes) */ |
| zmax sizetab[MAX_TYPE+1]; |
| |
| /* Minimum and Maximum values each type can have. */ |
| /* Must be initialized in init_cg(). */ |
| zmax t_min[MAX_TYPE+1]; |
| zumax t_max[MAX_TYPE+1]; |
| zumax tu_max[MAX_TYPE+1]; |
| |
| /* Names of all registers. will be initialized in init_cg(), |
| register number 0 is invalid, valid registers start at 1 */ |
| char *regnames[MAXR+1]; |
| |
| /* The Size of each register in bytes. */ |
| zmax regsize[MAXR+1]; |
| |
| /* a type which can store each register. */ |
| struct Typ *regtype[MAXR+1]; |
| |
| /* regsa[reg]!=0 if a certain register is allocated and should */ |
| /* not be used by the compiler pass. */ |
| int regsa[MAXR+1]; |
| |
| /* Specifies which registers may be scratched by functions. */ |
| int regscratch[MAXR+1]; |
| |
| /* specifies the priority for the register-allocator, if the same |
| estimated cost-saving can be obtained by several registers, the |
| one with the highest priority will be used */ |
| int reg_prio[MAXR+1]; |
| |
| /* an empty reg-handle representing initial state */ |
| struct reg_handle empty_reg_handle={0,0}; |
| |
| /* Names of target-specific variable attributes. */ |
| char *g_attr_name[]={"__interrupt","__zpage","__nocpr",0}; |
| |
| #define INTERRUPT 1 |
| #define ZPAGE 2 |
| #define NOCOMPRESS 4 |
| |
| /****************************************/ |
| /* Private data and functions. */ |
| /****************************************/ |
| |
| #define STDSYNTAX (g_flags[0]&USEDFLAG) |
| #define NORAX (g_flags[1]&USEDFLAG) |
| #define VOL_GPRS ((g_flags[2]&USEDFLAG)?g_flags_val[2].l:NUM_GPRS/2) |
| #define IEEE (g_flags[3]&USEDFLAG) |
| #define NOPEEP (g_flags[4]&USEDFLAG) |
| #define CBMASCII (g_flags[5]&USEDFLAG) |
| #define SOFTSTACK (g_flags[6]&USEDFLAG) |
| #define GPR_ARGS ((g_flags[7]&USEDFLAG)?g_flags_val[7].l:8) |
| #define MAINARGS (g_flags[9]&USEDFLAG) |
| #define NOBANKVARS (g_flags[10]&USEDFLAG) |
| #define COMMONBANK ((g_flags[11]&USEDFLAG)?g_flags_val[11].l:0) |
| #define BIGZPAGE (g_flags[12]&USEDFLAG) |
| #define OLDFP (g_flags[13]&USEDFLAG) |
| #define LARGE (g_flags[14]&USEDFLAG) |
| #define GLOBACC (g_flags[15]&USEDFLAG) |
| #define NOSWITCH (g_flags[16]&USEDFLAG) |
| #define NOBANKING (g_flags[17]&USEDFLAG) |
| #define ATASCII (g_flags[18]&USEDFLAG) |
| #define C02 (g_flags[19]&USEDFLAG) |
| |
| |
| |
| #define STR_NEAR "near" |
| #define STR_FAR "far" |
| #define STR_HUGE "huge" |
| |
| #define PLA (-1) |
| #define JMPIND (-2) |
| |
| static void function_top(FILE *,struct Var *,long); |
| static void function_bottom(FILE *f,struct Var *,long); |
| |
| #define isreg(x) ((p->x.flags&(REG|DREFOBJ))==REG) |
| #define isacc(x) (isreg(x)&&(p->x.reg==ra||p->x.reg==rax)) |
| #define isconst(x) ((p->x.flags&(KONST|DREFOBJ))==KONST) |
| |
| #define isptr(r) ((r)>=FIRST_PAIR&&(r)<=LAST_PAIR) |
| |
| static int q1reg,q2reg,zreg; |
| |
| static char *ccs[]={"eq","ne","lt","ge","le","gt",""}; |
| static char *logicals[]={"ora","eor","and"}; |
| static char *arithmetics[]={"slw","srw","adc","sbc","mullw","divw","mod"}; |
| |
| /* alignment of basic data-types, used to initialize align[] */ |
| static long malign[MAX_TYPE+1]= {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}; |
| /* sizes of basic data-types, used to initialize sizetab[] */ |
| static long msizetab[MAX_TYPE+1]={1,1,2,2,4,8,4,4,4,0,2,3,3,0,0,0,1,0}; |
| static char *mregnames[MAXR+1]; |
| |
| /* Typenames (needed because of HAVE_EXT_TYPES). */ |
| char *typname[]={"strange","char","short","int","long","long long", |
| "float","double","long double","void", |
| "near-pointer","far-pointer","huge-pointer", |
| "array","struct","union","enum","function"}; |
| |
| |
| /* used to initialize regtyp[] */ |
| static struct Typ ityp={INT},ctyp={CHAR},ftyp={FLOAT},lltyp={LLONG}; |
| |
| /* macros defined by the backend */ |
| static char *marray[]={"__section(x)=__vattr(\"section(\"#x\")\")", |
| "__m65__", |
| "__SIZE_T_INT", |
| "__bank(x)=__vattr(\"bank(\"#x\")\")", |
| "__far=__attr(\"far\")", |
| "__near=__attr(\"near\")", |
| "__huge=__attr(\"huge\")", |
| 0}; |
| |
| /* special registers */ |
| static int ra=1, rx=2, ry=3, rz=4, sp1=5,sp2=6,sp=7,fp,fp1,fp2; |
| static int t4=LAST_GPR,t3=LAST_GPR-1,t2=LAST_GPR-2,t1=LAST_GPR-3; |
| static int rax=8; |
| static int raxyz=9; |
| static int yval; |
| #define NOVAL 1000 |
| |
| static int t1,t2,f1,f2; /*tODO: remove*/ |
| |
| static int pushedacc,pushedx,nopeep,cbmascii,atascii,ieee; |
| static int c02,noy; |
| static int has_inc_a=1; // MEGA65 has INC A / INA instruction |
| static int has_zero_reg=0; |
| static char *jmpinst; |
| static int pass; |
| static int libsave; |
| static struct rpair rp2; |
| static int cbank; |
| static Var bankv; |
| static int bankvoffset; |
| static int bankcnum; |
| static obj zstore; |
| static int zstoreflag; |
| |
| #define SECLEN 128 |
| char *use_sec; |
| int use_bank=-1; |
| |
| #define dt(t) (((t)&UNSIGNED)?udt[(t)&NQ]:sdt[(t)&NQ]) |
| static char *sdt[MAX_TYPE+1]={"??","c","s","i","l","ll","f","d","ld","v","p"}; |
| static char *udt[MAX_TYPE+1]={"??","uc","us","ui","ul","ull","f","d","ld","v","p"}; |
| |
| /* perhaps provide version with 8bit int? */ |
| #define ISCHAR(t) ((t&NQ)==CHAR) |
| #define ISSHORT(t) ((t&NQ)==SHORT||(t&NQ)==INT||(t&NQ)==POINTER) |
| #define ISFPOINTER(t) ((t&NQ)==FPOINTER) |
| #define ISLONG(t) ((t&NQ)==LONG) |
| #define ISLLONG(t) ((t&NQ)==LLONG) |
| |
| #define ISIDX(r) (r==rx||r==rz) |
| |
| /* am */ |
| #define IMM_IND 1 |
| #define GPR_IND 2 |
| #define ABS_IND 3 |
| |
| /* sections */ |
| #define DATA 0 |
| #define BSS 1 |
| #define CODE 2 |
| #define RODATA 3 |
| #define SPECIAL 4 |
| |
| static long stack; |
| static int stack_valid; |
| static int section=-1,newobj; |
| static char *codename="\tsection\ttext", |
| *dataname="\tsection\tdata", |
| *bssname="\tsection\tbss", |
| *rodataname="\tsection\trodata"; |
| |
| /* return-instruction */ |
| static char *ret; |
| |
| /* label at the end of the function (if any) */ |
| static int exit_label; |
| |
| /* assembly-prefixes for labels and external identifiers */ |
| static char *labprefix="l",*idprefix="_"; |
| |
| /* variables to calculate the size and partitioning of the stack-frame |
| in the case of FIXED_SP */ |
| static long frameoffset,pushed,maxpushed,framesize; |
| |
| static long localsize,rsavesize,rscnt,argsize; |
| |
| static void emit_obj(FILE *f,struct obj *p,int t); |
| |
| /* calculate the actual current offset of an object relativ to the |
| stack-pointer; we use a layout like this: |
| ------------------------------------------------ |
| | arguments to this function | |
| ------------------------------------------------ |
| | caller-save registers [size=rsavesize] | |
| ------------------------------------------------ |
| | local variables [size=localsize] | |
| ------------------------------------------------ |
| | arguments to called functions [size=argsize] | |
| ------------------------------------------------ |
| All sizes will be aligned as necessary. |
| In the case of FIXED_SP, the stack-pointer will be adjusted at |
| function-entry to leave enough space for the arguments and have it |
| aligned to 16 bytes. Therefore, when calling a function, the |
| stack-pointer is always aligned to 16 bytes. |
| For a moving stack-pointer, the stack-pointer will usually point |
| to the bottom of the area for local variables, but will move while |
| arguments are put on the stack. |
| |
| This is just an example layout. Other layouts are also possible. |
| */ |
| |
| static int bank(Var *v) |
| { |
| char *s=v->vattr; |
| int n,r; |
| if(!NOBANKING&&s&&(s=strstr(s,"bank("))){ |
| if(sscanf(s+5,"%i",&n)==1) |
| return n; |
| } |
| return -1; |
| } |
| |
| static void ebank(FILE *f,int b) |
| { |
| if(b>=0) emit(f,"%d",b); |
| emit(f,"\n"); |
| } |
| |
| static long real_offset(struct obj *o) |
| { |
| long off=zm2l(o->v->offset); |
| if(off<0){ |
| /* function parameter */ |
| off=localsize+rsavesize-off-zm2l(maxalign); |
| } |
| |
| off+=argsize; |
| off+=zm2l(o->val.vmax); |
| return off; |
| } |
| |
| /* Initializes an addressing-mode structure and returns a pointer to |
| that object. Will not survive a second call! */ |
| static struct obj *cam(int flags,int base,long offset) |
| { |
| static struct obj obj; |
| static struct AddressingMode am; |
| obj.am=&am; |
| am.flags=flags; |
| am.base=base; |
| am.offset=offset; |
| return &obj; |
| } |
| |
| /* changes to a special section, used for __section() */ |
| static int special_section(FILE *f,struct Var *v) |
| { |
| char *sec; |
| if(v->tattr&ZPAGE){ |
| emit(f,"\tsection\tzpage\n"); |
| }else{ |
| if(!v->vattr) return 0; |
| sec=strstr(v->vattr,"section("); |
| if(!sec) return 0; |
| sec+=strlen("section("); |
| emit(f,"\tsection\t"); |
| while(*sec&&*sec!=')') emit_char(f,*sec++); |
| emit(f,"\n"); |
| } |
| if(f) section=SPECIAL; |
| return 1; |
| } |
| |
| |
| |
| #define chk_coll(x) do{if((x)==r||(x)==r1||(x)==r2) return 0; \ |
| if(reg_pair((x),&rp)&&(rp.r1==r||rp.r2==r)) return 0;}while(0) |
| |
| static int scratch(IC *p,int r) |
| { |
| int r1,r2; |
| if(!p) return 1; |
| if(reg_pair(r,&rp)){ |
| r1=rp.r1; |
| r2=rp.r2; |
| }else{ |
| r1=0; |
| r2=0; |
| } |
| if(isreg(z)&&p->z.reg==r){ |
| if(!(p->q2.flags®)) |
| return 1; |
| if(p->q2.reg==r||p->q2.reg==r1||p->q2.reg==r2) |
| return 0; |
| if(reg_pair(p->q2.reg,&rp)) |
| if(rp.r1==r||rp.r2==r) |
| return 0; |
| return 1; |
| } |
| while(p){ |
| if(p->code==LABEL||p->code==CALL) |
| return 0; |
| if(p->code>=BEQ&&p->code<=BRA) |
| return 0; |
| if(p->code==FREEREG||p->code==ALLOCREG){ |
| if(p->q1.reg==r) |
| return 1; |
| if(reg_pair(p->q1.reg,&rp)&&(rp.r1==r||rp.r2==r)) |
| return 1; |
| } |
| if(p->q1.am) chk_coll(p->q1.am->base); |
| if(p->q2.am) chk_coll(p->q2.am->base); |
| if(p->z.am) chk_coll(p->z.am->base); |
| if(p->q1.flags®) chk_coll(p->q1.reg); |
| if(p->q2.flags®) chk_coll(p->q2.reg); |
| if(p->z.flags®){ |
| if(p->z.flags&DREFOBJ) |
| chk_coll(p->z.reg); |
| else{ |
| if(p->z.reg==r) |
| return 1; |
| if(reg_pair(p->z.reg,&rp)&&(rp.r1==r||rp.r2==r)) |
| return 1; |
| } |
| } |
| |
| p=p->next; |
| } |
| return 1; |
| } |
| |
| static int rsavecur; |
| static int in_isr; |
| |
| static int get_reg(FILE *f,IC *p,int t) |
| { |
| int r,r1,r2,pass,flag; |
| |
| for(pass=0;pass<5;pass++){ |
| for(r=MAXR;r>sp;r--){ |
| if(reg_pair(r,&rp)){ |
| r1=rp.r1; |
| r2=rp.r2; |
| }else{ |
| r1=0; |
| r2=0; |
| } |
| if((pass==0||pass==3)&&(!regscratch[r]||in_isr)) |
| continue; |
| if(pass<3){ |
| if(regs[r]) continue; |
| if(r1&&(regs[r1]||regs[r2])) continue; |
| } |
| if(pass==2&&!(regs[r]&4)) |
| continue; |
| if((p->q1.flags®)&&(p->q1.reg==r||p->q1.reg==r1||p->q1.reg==r2)) continue; |
| if((p->q2.flags®)&&(p->q2.reg==r||p->q2.reg==r1||p->q2.reg==r2)) continue; |
| if((p->z.flags®)&&(p->z.reg==r||p->z.reg==r1||p->z.reg==r2)) continue; |
| if(regok(r,t,1)){ |
| flag=8; |
| if(regs[r]){ |
| flag|=2; |
| if(p->code==COMPARE||p->code==TEST) |
| ierror(0); |
| if(regs[ra]){ |
| emit(f,"\ttay\n"); |
| yval=NOVAL; |
| } |
| if(r1){ |
| emit(f,"\tlda\t%s\n",mregnames[r1]); |
| emit(f,"\tpha\n"); |
| emit(f,"\tlda\t%s\n",mregnames[r2]); |
| emit(f,"\tpha\n"); |
| }else{ |
| emit(f,"\tlda\t%s\n",mregnames[r]); |
| emit(f,"\tpha\n"); |
| } |
| if(regs[ra]) |
| emit(f,"\ttya\n"); |
| } |
| if(r1){ |
| regs[r1]|=flag; |
| regs[r2]|=flag; |
| } |
| regs[r]|=flag; |
| regused[r]=1; |
| regused[r1]=1; |
| regused[r2]=1; |
| return r; |
| } |
| } |
| } |
| pric2(stdout,p); |
| ierror(0); |
| } |
| |
| static void get_acc(FILE *f, IC *p,int t) |
| { |
| int r; |
| if(isacc(z)) return; |
| t&=NQ; |
| if(ISCHAR(t)){ |
| if(1/*!isreg(q1)||(p->q1.reg!=ra&&p->q1.reg!=rax)*/){ |
| if((regs[ra]||regs[rax])&&!scratch(p,ra)&&!pushedacc){ |
| if(optsize||(regs[t1]&®s[t2]&®s[t3]&®s[t4])){ |
| emit(f,"\tpha\n"); |
| pushedacc=-1; |
| }else{ |
| r=get_reg(f,p,CHAR); |
| emit(f,"\tsta\t%s\n",mregnames[r]); |
| pushedacc=r; |
| } |
| } |
| } |
| }else{ |
| if(1/*!isreg(q1)||p->q1.reg!=rax*/){ |
| if((regs[ra]||regs[rax])&&(!scratch(p,ra)||!scratch(p,rax))&&!pushedacc){ |
| r=get_reg(f,p,CHAR); |
| emit(f,"\tsta\t%s\n",mregnames[r]); |
| pushedacc=r; |
| } |
| if((regs[rx]||regs[rax])&&!scratch(p,rax)&&!pushedx){ |
| r=get_reg(f,p,CHAR); |
| emit(f,"\tstx\t%s\n",mregnames[r]); |
| pushedx=r; |
| } |
| } |
| } |
| } |
| |
| static int cmp_get_acc(FILE *f,IC *p,IC *branch) |
| { |
| if(!regs[ra]&&!regs[rax]) |
| return 0; |
| if(branch==0&&pushedacc) |
| return 0; |
| if(branch&&isreg(q1)&&(p->q1.reg==ra||p->q1.reg==rax)) |
| if(branch->code==BEQ||branch->code==BNE||(p->typf&UNSIGNED)) |
| return 0; |
| if(scratch(p,ra)) |
| return 0; |
| if(!regs[rx]&&!regs[rax]){ |
| emit(f,"\ttax\n"); |
| pushedacc=rx; |
| } |
| emit(f,"\tpha\n"); |
| pushedacc=-1; |
| return pushedacc; |
| } |
| |
| static void reload_acc_opt(FILE *f,IC *p) |
| { |
| if(pushedacc==0) return; |
| if(pushedacc>0){ |
| while(p){ |
| if(p->code!=FREEREG) break; |
| if(p->q1.reg==ra||p->q1.reg==rax){ |
| pushedacc=0; |
| return; |
| } |
| p=p->next; |
| } |
| } |
| if(pushedacc==-1) |
| emit(f,"\tpla\n"); |
| else if(pushedacc==rx) |
| emit(f,"\ttxa\n"); |
| else if(pushedacc==ry) |
| emit(f,"\ttya\n"); |
| else if(pushedacc){ |
| emit(f,"\tlda\t%s\n",mregnames[pushedacc]); |
| regs[pushedacc]&=~8; |
| } |
| pushedacc=0; |
| } |
| |
| static void reload_acc(FILE *f) |
| { |
| reload_acc_opt(f,0); |
| } |
| |
| static void push(int i) |
| { |
| pushed-=i; |
| if(pushed<maxpushed) |
| maxpushed=pushed; |
| } |
| |
| static void pop(int i) |
| { |
| pushed+=i; |
| if(pushed>0) ierror(0); |
| } |
| |
| static int indirect(obj *o) |
| { |
| if((o->flags&(DREFOBJ|KONST))==DREFOBJ) |
| return 1; |
| if((o->flags&(REG|VAR))!=VAR){ |
| if(o->reg==ra||ISIDX(o->reg)||o->reg==rax) |
| return 1; |
| return 0; |
| } |
| if(o->v->storage_class==AUTO||o->v->storage_class==REGISTER) |
| return 1; |
| return 0; |
| } |
| |
| void convfloat(void) |
| { |
| } |
| |
| void sety(FILE *f,int val) |
| { |
| if(yval==val) |
| return; |
| if(val-yval==1) |
| emit(f,"\tiny\n"); |
| else if(yval-val==1) |
| emit(f,"\tdey\n"); |
| else{ |
| emit(f,"\tldy\t#%d\n",val); |
| if(val<0||val>255) |
| ierror(0); |
| } |
| yval=val; |
| } |
| |
| static void cnv_fp(void) |
| { |
| double d,mant; |
| int exp; |
| unsigned long t; |
| |
| if(ieee){ |
| vfloat=zld2zf(vldouble); |
| memcpy((void*)&vmax,(void*)&vfloat,4); |
| }else{ |
| d=zld2d(vldouble); |
| mant=frexp(d,&exp); |
| exp=(exp+127)&255; |
| t=((unsigned long)(mant*8388608))&0xffffff; |
| t|=((long)exp)<<24; |
| |
| t=((t&0xff)<<24)|((t&0xff00)<<8)|((t&0xff0000)>>8)|((t&0xff000000)>>24); |
| vmax=l2zm((long)t); |
| if(mant==0&&d==0) vmax=Z0; |
| } |
| } |
| |
| static void emit_ieee(FILE *f,union atyps *p,int t) |
| { |
| unsigned char *ip=(unsigned char *)&p->vdouble; |
| emit(f,"0x%02x%02x,0x%02x%02x",ip[1],ip[0],ip[3],ip[2]); |
| if(t==DOUBLE||t==LDOUBLE) |
| emit(f,",0x%02x%02x,0x%02x%02x",ip[5],ip[4],ip[7],ip[6]); |
| emit(f,"\n"); |
| } |
| |
| static void emit_lobyte(FILE *f,obj *o,int t) |
| { |
| if(o->flags&KONST){ |
| if(o->flags&DREFOBJ){ |
| eval_const(&o->val,o->dtyp); |
| emit(f,"%d",zm2l(vmax)); |
| }else{ |
| eval_const(&o->val,t); |
| if(ISFLOAT(t)) cnv_fp(); |
| emit(f,"#%d",zm2l(vmax)&255); |
| } |
| }else if(o->flags&VARADR){ |
| emit(f,"#<("); |
| emit_obj(f,o,t); |
| emit(f,")"); |
| }else if((o->flags&(REG|DREFOBJ))==REG){ |
| if(!reg_pair(o->reg,&rp)) |
| emit(f,"%s",mregnames[o->reg]); |
| else |
| emit(f,"%s",mregnames[rp.r1]); |
| }else{ |
| if(c02&&(o->flags&(DREFOBJ|KONST))==DREFOBJ) noy=1; |
| emit_obj(f,o,t); |
| noy=0; |
| } |
| } |
| |
| static void emit_hibyte(FILE *f,obj *o,int t) |
| { |
| if(o->flags&KONST){ |
| if(o->flags&DREFOBJ){ |
| eval_const(&o->val,o->dtyp); |
| emit(f,"%d",zm2l(vmax)+1); |
| }else{ |
| eval_const(&o->val,t); |
| if(ISFLOAT(t)) cnv_fp(); |
| emit(f,"#%d",(zm2l(vmax)>>8)&255); |
| } |
| }else if(o->flags&VARADR){ |
| emit(f,"#>("); |
| emit_obj(f,o,t); |
| emit(f,")"); |
| }else if((o->flags&(REG|DREFOBJ))==REG){ |
| if(o->reg>=FIRST_BIG&&o->reg<=LAST_BIGP){ |
| emit(f,"%s+1",mregnames[o->reg]); |
| }else{ |
| if(!reg_pair(o->reg,&rp)) |
| ierror(0); |
| emit(f,"%s",mregnames[rp.r2]); |
| } |
| }else{ |
| if(o->flags&VARADR) |
| emit(f,"#"); |
| if(!(o->flags&DREFOBJ)) |
| o->val.vmax=zmadd(o->val.vmax,Z1); |
| emit_obj(f,o,t); |
| if(!(o->flags&DREFOBJ)) |
| o->val.vmax=zmsub(o->val.vmax,Z1); |
| } |
| } |
| |
| static void emit_byte3(FILE *f,obj *o,int t) |
| { |
| if(o->flags&KONST){ |
| if(o->flags&DREFOBJ){ |
| eval_const(&o->val,o->dtyp); |
| emit(f,"%d",zm2l(vmax)+2); |
| }else{ |
| eval_const(&o->val,t); |
| if(ISFLOAT(t)) cnv_fp(); |
| emit(f,"#%d",(zm2l(vmax)>>16)&255); |
| } |
| }else if((o->flags&(REG|DREFOBJ))==REG){ |
| emit(f,"%s+2",mregnames[o->reg]); |
| }else if(o->flags&VARADR){ |
| emit(f,"#%d",bank(o->v)); |
| }else{ |
| if(!(o->flags&DREFOBJ)) |
| o->val.vmax=zmadd(o->val.vmax,l2zm(2L)); |
| emit_obj(f,o,t); |
| if(!(o->flags&DREFOBJ)) |
| o->val.vmax=zmsub(o->val.vmax,l2zm(2L)); |
| } |
| } |
| |
| static void emit_byte4(FILE *f,obj *o,int t) |
| { |
| if(o->flags&KONST){ |
| if(o->flags&DREFOBJ){ |
| eval_const(&o->val,o->dtyp); |
| emit(f,"%d",zm2l(vmax)+3); |
| }else{ |
| eval_const(&o->val,t); |
| if(ISFLOAT(t)) cnv_fp(); |
| emit(f,"#%d",(zm2l(vmax)>>24)&255); |
| } |
| }else if((o->flags&(REG|DREFOBJ))==REG){ |
| emit(f,"%s+3",mregnames[o->reg]); |
| }else{ |
| if(!(o->flags&DREFOBJ)) |
| o->val.vmax=zmadd(o->val.vmax,l2zm(3L)); |
| emit_obj(f,o,t); |
| if(!(o->flags&DREFOBJ)) |
| o->val.vmax=zmsub(o->val.vmax,l2zm(3L)); |
| } |
| } |
| |
| static void do_lobyte(FILE *f,char *s,obj *o,int type) |
| { |
| if(o->am){ |
| if(o->am->flags==IMM_IND) |
| sety(f,o->am->offset); |
| else if(o->am->flags==GPR_IND||o->am->flags==ABS_IND){ |
| if(o->am->idx==ra) |
| emit(f,"\ttay\n"); |
| else{ |
| if(ISIDX(o->am->idx)){ |
| if(o->am->flags==GPR_IND){ |
| emit(f,"\tpha\n"); |
| emit(f,"\tt%sa\n",mregnames[o->am->idx]); |
| emit(f,"\ttay\n"); |
| emit(f,"\tpla\n"); |
| } |
| }else |
| emit(f,"\tldy\t%s\n",mregnames[o->am->idx]); |
| } |
| yval=NOVAL; |
| }else |
| ierror(0); |
| }else if((o->flags&(DREFOBJ|KONST))==DREFOBJ){ |
| if(!c02) sety(f,0); |
| }else if((o->flags&(VAR|REG|VARADR))==VAR&&(o->v->storage_class==AUTO||o->v->storage_class==REGISTER)){ |
| sety(f,(int)real_offset(o)); |
| } |
| emit(f,"\t%s\t",s); |
| emit_lobyte(f,o,type); |
| emit(f,"\n"); |
| } |
| |
| static void do_hibyte(FILE *f,char *s,obj *o,int type) |
| { |
| int ami=0; |
| if(o->am){ |
| if(o->am->flags==IMM_IND) |
| sety(f,o->am->offset+1); |
| else if(o->am->flags==ABS_IND){ |
| if(o->am->offset==ra) |
| emit(f,"\ttay\n"); |
| else |
| emit(f,"\tldy\t%s\n",mregnames[o->am->idx]); |
| o->am->offset++;ami=1; |
| yval=NOVAL; |
| }else |
| ierror(0); |
| }else if((o->flags&(DREFOBJ|KONST))==DREFOBJ){ |
| sety(f,1); |
| }else if((o->flags&(VAR|REG|VARADR))==VAR&&(o->v->storage_class==AUTO||o->v->storage_class==REGISTER)){ |
| sety(f,(int)real_offset(o)+1); |
| } |
| emit(f,"\t%s\t",s); |
| emit_hibyte(f,o,type); |
| emit(f,"\n"); |
| if(ami) o->am->offset--; |
| } |
| |
| static void do_byte3(FILE *f,char *s,obj *o,int type) |
| { |
| int ami=0; |
| if(o->am){ |
| if(o->am->flags==IMM_IND) |
| sety(f,o->am->offset+2); |
| else if(o->am->flags==ABS_IND){ |
| if(o->am->offset==ra) |
| emit(f,"\ttay\n"); |
| else |
| emit(f,"\tldy\t%s\n",mregnames[o->am->idx]); |
| yval=NOVAL; |
| o->am->offset+=2;ami=1; |
| }else |
| ierror(0); |
| }else if((o->flags&(DREFOBJ|KONST))==DREFOBJ){ |
| sety(f,2); |
| }else if((o->flags&(VAR|REG|VARADR))==VAR&&(o->v->storage_class==AUTO||o->v->storage_class==REGISTER)){ |
| sety(f,(int)real_offset(o)+2); |
| } |
| emit(f,"\t%s\t",s); |
| emit_byte3(f,o,type); |
| emit(f,"\n"); |
| if(ami) o->am->offset-=2; |
| } |
| |
| static void do_byte4(FILE *f,char *s,obj *o,int type) |
| { |
| int ami=0; |
| if(o->am){ |
| if(o->am->flags==IMM_IND) |
| sety(f,o->am->offset+3); |
| else if(o->am->flags==ABS_IND){ |
| if(o->am->offset==ra) |
| emit(f,"\ttay\n"); |
| else |
| emit(f,"\tldy\t%s\n",mregnames[o->am->idx]); |
| yval=NOVAL; |
| o->am->offset+=3;ami=1; |
| }else |
| ierror(0); |
| }else if((o->flags&(DREFOBJ|KONST))==DREFOBJ){ |
| sety(f,3); |
| }else if((o->flags&(VAR|REG|VARADR))==VAR&&(o->v->storage_class==AUTO||o->v->storage_class==REGISTER)){ |
| sety(f,(int)real_offset(o)+3); |
| } |
| emit(f,"\t%s\t",s); |
| emit_byte4(f,o,type); |
| emit(f,"\n"); |
| if(ami) o->am->offset-=3; |
| } |
| |
| static void load_lobyte(FILE *f,obj *o,int t) |
| { |
| if((o->flags&(REG|DREFOBJ))==REG){ |
| if(o->reg==ra||o->reg==rax) |
| return; |
| if(o->reg==rx){ |
| emit(f,"\ttxa\n"); |
| return; |
| } |
| } |
| do_lobyte(f,"lda",o,t); |
| } |
| |
| static void load_hibyte(FILE *f,obj *o,int t) |
| { |
| if((o->flags®)&&(o->reg==rx||o->reg==rax)) |
| emit(f,"\ttxa\n"); |
| else |
| do_hibyte(f,"lda",o,t); |
| } |
| |
| static void store_lobyte(FILE *f,obj *o,int t) |
| { |
| if((o->flags&(REG|DREFOBJ))==REG){ |
| if(o->reg==ra||o->reg==rax) |
| return; |
| if(o->reg==rx){ |
| emit(f,"\ttax\n"); |
| return; |
| } |
| } |
| do_lobyte(f,"sta",o,t); |
| } |
| |
| static void store_hibyte(FILE *f,obj *o,int t) |
| { |
| if((o->flags®)&&(o->reg==rx||o->reg==rax)) |
| emit(f,"\ttax\n"); |
| else |
| do_hibyte(f,"sta",o,t); |
| } |
| |
| static void load_acc(FILE *f,obj *o,int type) |
| { |
| if((o->flags®)&&(o->reg==ra||o->reg==rax)) |
| return; |
| if(!ISCHAR(type)){ |
| if(indirect(o)){ |
| do_hibyte(f,"lda",o,type); |
| emit(f,"\ttax\n"); |
| }else |
| do_hibyte(f,"ldx",o,type); |
| } |
| if((o->flags&(REG|DREFOBJ))==REG&&o->reg==rx) |
| emit(f,"\ttxa\n"); |
| else |
| do_lobyte(f,"lda",o,type); |
| } |
| |
| static void store_acc(FILE *f,obj *o,int type) |
| { |
| if((o->flags&(DREFOBJ|KONST))==DREFOBJ&&((!(o->flags®))||!isptr(o->reg))){ |
| ierror(0); |
| } |
| if((o->flags®)&&(o->reg==ra||o->reg==rax)) |
| return; |
| if((o->flags®)&&o->reg==rx){ |
| emit(f,"\ttax\n"); |
| return; |
| } |
| store_lobyte(f,o,type); |
| if(!ISCHAR(type)){ |
| if(indirect(o)){ |
| /*TODO: save accu */ |
| emit(f,"\ttxa\n"); |
| store_hibyte(f,o,type); |
| }else |
| do_hibyte(f,"stx",o,type); |
| } |
| } |
| |
| static void load_reg(FILE *f,int r,struct obj *o,int type) |
| { |
| static obj ro; |
| if(ISIDX(r)&&!indirect(o)){ |
| static char ldr[4]="ldr"; |
| ldr[2]=mregnames[r][0]; |
| do_lobyte(f,ldr,o,type); |
| return; |
| } |
| ro.flags=REG; |
| ro.reg=r; |
| load_lobyte(f,o,type); |
| store_lobyte(f,&ro,type); |
| if(!ISCHAR(type)){ |
| load_hibyte(f,o,type); |
| store_hibyte(f,&ro,type); |
| } |
| } |
| |
| static void store_reg(FILE *f,int r,struct obj *o,int type) |
| { |
| static obj ro; |
| if(ISIDX(r)){ |
| if((o->flags&(REG|DREFOBJ))==REG){ |
| if(o->reg==r) |
| return; |
| if(o->reg==ra){ |
| emit(f,"\tt%sa\n",mregnames[r]); |
| return; |
| } |
| } |
| if(!indirect(o)){ |
| static char str[4]="str"; |
| str[2]=mregnames[r][0]; |
| do_lobyte(f,str,o,type); |
| return; |
| } |
| } |
| ro.flags=REG; |
| ro.reg=r; |
| if(r!=ra&&r!=rax) |
| load_acc(f,&ro,type); |
| store_acc(f,o,type); |
| } |
| |
| static struct fpconstlist { |
| struct fpconstlist *next; |
| int label; |
| int t; |
| union atyps val; |
| } *firstfpc; |
| |
| static int addfpconst(struct obj *o,int t) |
| { |
| struct fpconstlist *p=firstfpc; |
| t&=NQ; |
| if(t==LDOUBLE) t=DOUBLE; |
| for(p=firstfpc;p;p=p->next){ |
| if(t==p->t){ |
| eval_const(&p->val,t); |
| if(t==FLOAT&&zldeqto(vldouble,zf2zld(o->val.vfloat))) return p->label; |
| if(t==DOUBLE&&zldeqto(vldouble,zd2zld(o->val.vdouble))) return p->label; |
| if(t==LONG&&zmeqto(vmax,zl2zm(o->val.vlong))) return p->label; |
| if(t==LLONG&&zmeqto(vmax,zll2zm(o->val.vllong))) return p->label; |
| } |
| } |
| p=mymalloc(sizeof(struct fpconstlist)); |
| p->next=firstfpc; |
| p->t=t; |
| p->label=++label; |
| p->val=o->val; |
| firstfpc=p; |
| return p->label; |
| } |
| |
| /* generate code to load the address of a local variable into register r */ |
| static void load_laddr(FILE *f,int r,struct obj *o) |
| { |
| long l=real_offset(o); |
| /* assumes acc is available */ |
| if(!reg_pair(r,&rp)) ierror(0); |
| emit(f,"\tlda\t%s\n",mregnames[fp]); |
| if(l!=0) |
| emit(f,"\tclc\n"); |
| if(l&255) |
| emit(f,"\tadc\t#%ld\n",l&255); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r1]); |
| emit(f,"\tlda\t%s\n",mregnames[fp2]); |
| if(l!=0) |
| emit(f,"\tadc\t#%ld\n",(l>>8)&255); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r2]); |
| } |
| |
| /* generate code to load the address of a variable into register r */ |
| static void load_address(FILE *f,int r,struct obj *o,int t) |
| { |
| if(o->flags&DREFOBJ){ |
| o->flags&=~DREFOBJ; |
| load_reg(f,r,o,POINTER); |
| o->flags|=DREFOBJ; |
| }else if((o->flags&(REG|DREFOBJ))==REG){ |
| if(!reg_pair(r,&rp)) ierror(0); |
| emit(f,"\tlda\t#>%s\n",mregnames[o->reg]); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r2]); |
| emit(f,"\tlda\t#<%s\n",mregnames[o->reg]); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r1]); |
| }else if(o->flags&VAR){ |
| if(o->v->storage_class==AUTO||o->v->storage_class==REGISTER){ |
| load_laddr(f,r,o); |
| }else{ |
| o->flags|=VARADR; |
| load_reg(f,r,o,POINTER); |
| o->flags&=~VARADR; |
| } |
| }else if((o->flags&(KONST|DREFOBJ))==KONST){ |
| int l=addfpconst(o,t); |
| if(!ieee) ierror(0); |
| if(!reg_pair(r,&rp)) ierror(0); |
| emit(f,"\tlda\t#>%s%d\n",labprefix,l); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r2]); |
| emit(f,"\tlda\t#<%s%d\n",labprefix,l); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r1]); |
| }else |
| ierror(0); |
| } |
| |
| |
| /* Yields log2(x)+1 or 0. */ |
| static long pof2(zumax x) |
| { |
| zumax p;int ln=1; |
| p=ul2zum(1L); |
| while(ln<=32&&zumleq(p,x)){ |
| if(zumeqto(x,p)) return ln; |
| ln++;p=zumadd(p,p); |
| } |
| return 0; |
| } |
| |
| static void incmem(FILE *f,obj *o,int t,int op,int x) |
| { |
| int i,idx=0; |
| char *s; |
| if((o->flags&(REG|DREFOBJ))==REG&&ISIDX(o->reg)){ |
| static char buf[4]=" "; |
| idx=1;s=buf; |
| if(op==ADD){s[0]='i';s[1]='n';}else{s[0]='d';s[1]='e';} |
| s[2]=mregnames[o->reg][0]; |
| }else if(op==ADD) |
| s="inc"; |
| else if(op==SUB) |
| s="dec"; |
| else if(op==LSHIFT) |
| s="asl"; |
| else if(op==RSHIFT&&(t&UNSIGNED)) |
| s="clc\n\tror"; |
| else if(op==RSHIFT){ |
| s="cmp\t#128\n\tror"; |
| }else |
| ierror(0); |
| if(ISCHAR(t)){ |
| for(i=0;i<x;i++){ |
| if(idx){ |
| emit(f,"\t%s\n",s); |
| }else{ |
| emit(f,"\t%s\t",s); |
| emit_obj(f,o,t); |
| emit(f,"\n"); |
| } |
| } |
| }else{ |
| for(i=0;i<x;i++){ |
| if(op==SUB){ |
| /* caller mus make sure accu is available */ |
| load_lobyte(f,o,t); |
| emit(f,"\tbne\t%s%d\n",labprefix,++label); |
| emit(f,"\tdec\t"); |
| emit_hibyte(f,o,t); |
| emit(f,"\n"); |
| emit(f,"%s%d:\n",labprefix,label); |
| emit(f,"\tdec\t"); |
| emit_lobyte(f,o,t); |
| emit(f,"\n"); |
| }else if(op==ADD){ |
| emit(f,"\t%s\t",s); |
| emit_lobyte(f,o,t); |
| emit(f,"\n"); |
| emit(f,"\tbne\t%s%d\n",labprefix,++label); |
| emit(f,"\t%s\t",s); |
| emit_hibyte(f,o,t); |
| emit(f,"\n"); |
| emit(f,"%s%d:\n",labprefix,label); |
| }else if(op==LSHIFT){ |
| // 4510 / 45GS02 have ASW/ROW operations |
| // for left-shifting 16-bit values |
| |
| emit(f,"\tasw\t"); |
| emit_obj(f,o,t); |
| emit(f,"\n"); |
| |
| }else if(op==RSHIFT&&(t&UNSIGNED)){ |
| emit(f,"\tclc\n"); |
| emit(f,"\tror\t"); |
| emit_hibyte(f,o,t); |
| emit(f,"\n"); |
| emit(f,"\tror\t"); |
| emit_lobyte(f,o,t); |
| emit(f,"\n"); |
| }else if(op==RSHIFT){ |
| load_hibyte(f,o,t); |
| emit(f,"\tcmp\t#128\n"); |
| emit(f,"\tror\t"); |
| emit_hibyte(f,o,t); |
| emit(f,"\n"); |
| emit(f,"\tror\t"); |
| emit_lobyte(f,o,t); |
| emit(f,"\n"); |
| }else{ |
| printf("op=%d\n",op); |
| ierror(0); |
| } |
| } |
| } |
| } |
| |
| static void preload_obj(FILE *f,IC *p,obj *o) |
| { |
| int r;long of; |
| |
| if((p->typf&VOLATILE)||(p->typf2&VOLATILE)|| |
| ((p->q1.flags&DREFOBJ)&&(p->q1.dtyp&(VOLATILE|PVOLATILE)))|| |
| ((p->q2.flags&DREFOBJ)&&(p->q2.dtyp&(VOLATILE|PVOLATILE)))|| |
| ((p->z.flags&DREFOBJ)&&(p->z.dtyp&(VOLATILE|PVOLATILE)))) |
| emit(f,"; volatile barrier\n"); |
| |
| |
| if((o->flags&(VAR|REG))==VAR&&(o->v->storage_class==AUTO||o->v->storage_class==REGISTER)&&(of=real_offset(o))+zm2l(szof(o->v->vtyp))>255){ |
| r=get_reg(f,p,POINTER); |
| if(o->flags&DREFOBJ) |
| get_acc(f,p,INT); |
| else |
| cmp_get_acc(f,p,0); |
| if(!reg_pair(r,&rp)) ierror(0); |
| emit(f,"\tlda\t%s\n",mregnames[fp1]); |
| emit(f,"\tclc\n"); |
| if(of&0xff) |
| emit(f,"\tadc\t#%ld\n",of&0xff); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r1]); |
| emit(f,"\tlda\t%s\n",mregnames[fp2]); |
| if(1/*of&0xff00*/) |
| emit(f,"\tadc\t#%ld\n",(of>>8)&0xff); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r2]); |
| o->flags|=REG; |
| o->reg=r; |
| if(o->flags&DREFOBJ){ |
| if(!c02) sety(f,0); |
| emit(f,"\tlda\t(%s)%s\n",mregnames[r],c02?"":",y"); |
| emit(f,"\ttxa\n"); |
| sety(f,1); |
| emit(f,"\tlda\t(%s),y\n",mregnames[r]); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r2]); |
| emit(f,"\tstx\t%s\n",mregnames[rp.r1]); |
| }else{ |
| o->flags|=DREFOBJ; |
| o->dtyp=POINTER; |
| } |
| } |
| |
| if((o->flags&(DREFOBJ|KONST))==DREFOBJ&&(!(o->flags®)||!isptr(o->reg))&&(!(o->flags&VAR)||!(o->v->tattr&ZPAGE))&&!ISFPOINTER(o->dtyp)){ |
| cmp_get_acc(f,p,0); |
| r=get_reg(f,p,POINTER); |
| o->flags&=~DREFOBJ; |
| load_reg(f,r,o,POINTER); |
| o->flags|=REG|DREFOBJ; |
| o->reg=r; |
| } |
| } |
| |
| static void far_copy(FILE *f,IC *p) |
| { |
| int b;long l; |
| get_acc(f,p,INT); |
| if(p->code==PUSH){ |
| if(!reg_pair(LAST_PAIR,&rp)) ierror(0); |
| emit(f,"\tlda\t%s\n",mregnames[sp]); |
| if(pushed) emit(f,"\tclc\n"); |
| if(pushed&0xff) emit(f,"\tadc\t#%d\n",(pushed&0xff)); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r1]); |
| emit(f,"\tlda\t%s+1\n",mregnames[sp]); |
| if(pushed) emit(f,"\tadc\t#%d\n",((pushed>>8)&0xff)); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r2]); |
| pushed+=zm2l(p->q2.val.vmax); |
| emit(f,"\tldx\t#%d\n",bankcnum); |
| }else if(p->z.flags&DREFOBJ){ |
| if(!reg_pair(LAST_PAIR,&rp)) ierror(0); |
| p->z.flags&=~DREFOBJ; |
| load_lobyte(f,&p->z,FPOINTER); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r1]); |
| load_hibyte(f,&p->z,FPOINTER); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r2]); |
| if(indirect(&p->z)){ |
| do_byte3(f,"lda",&p->z,FPOINTER); |
| emit(f,"\ttax\n"); |
| }else |
| do_byte3(f,"ldx",&p->z,FPOINTER); |
| }else{ |
| load_address(f,LAST_PAIR,&p->z,POINTER); |
| b=bank(p->z.v); |
| emit(f,"\tldx\t#%d\n",b>=0?b:bankcnum); |
| } |
| if(p->q1.flags&DREFOBJ){ |
| if(!reg_pair(LAST_PAIR-1,&rp)) ierror(0); |
| p->q1.flags&=~DREFOBJ; |
| load_lobyte(f,&p->q1,FPOINTER); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r1]); |
| load_hibyte(f,&p->q1,FPOINTER); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r2]); |
| if(indirect(&p->q1)){ |
| do_byte3(f,"lda",&p->q1,FPOINTER); |
| emit(f,"\ttay\n"); |
| }else |
| do_byte3(f,"ldy",&p->q1,FPOINTER); |
| }else{ |
| load_address(f,LAST_PAIR-1,&p->q1,POINTER); |
| b=bank(p->q1.v); |
| sety(f,b>=0?b:bankcnum); |
| } |
| l=zm2l(p->q2.val.vmax); |
| emit(f,"\tlda\t#%d\n",(l>>8)&0xff); |
| emit(f,"\tsta\t%s__bankcopy_len+1\n",idprefix); |
| emit(f,"\tlda\t#%d\n",(l)&0xff); |
| emit(f,"\tsta\t%s__bankcopy_len\n",idprefix); |
| emit(f,"\tlda\t#%d\n",cbank>=0?cbank:bankcnum); |
| emit(f,"\tjsr\t%s__bankcopy\n",idprefix); |
| yval=NOVAL; |
| } |
| |
| static void load_far(FILE *f,IC *p,obj *o,int t) |
| { |
| int pushed=0; |
| if(!(o->flags&DREFOBJ)) ierror(0); |
| o->flags&=~DREFOBJ; |
| t&=NQ; |
| if(zmeqto(sizetab[t],Z0)) return; |
| /*get_acc(f,p,INT);*/ |
| if(pushedacc==t3||pushedacc==t4) ierror(0); |
| if(pushedx==t3||pushedx==t4) ierror(0); |
| if(regs[ra]||regs[rax]){ |
| if(isacc(q1)||isacc(q2)||!isacc(z)){ |
| pushed=1; |
| emit(f,"\tpha\n"); |
| if(regs[rax]) emit(f,"\ttxa\n\tpha\n"); |
| } |
| } |
| load_reg(f,LAST_PAIR,o,POINTER); |
| if(!indirect(o)) |
| do_byte3(f,"ldy",o,CHAR); |
| else{ |
| do_byte3(f,"lda",o,CHAR); |
| emit(f,"\ttay\n"); |
| } |
| emit(f,"\tldx\t#%d\n",bankvoffset); |
| emit(f,"\tlda\t#%d\n",cbank>=0?cbank:bankcnum); |
| emit(f,"\tjsr\t%s__bankload%d\n",idprefix,(int)zm2l(sizetab[t])); |
| yval=NOVAL; |
| o->flags=VAR; |
| o->v=&bankv; |
| o->val.vmax=l2zm((long)bankvoffset); |
| bankvoffset+=zm2l(sizetab[t]); |
| if(pushed){ |
| if(regs[rax]) emit(f,"\tpla\n\ttax\n"); |
| emit(f,"\tpla\n"); |
| } |
| } |
| |
| static void load_banked(FILE *f,IC *p,obj *o,int t) |
| { |
| int pushed=0,m; |
| if(o->flags&DREFOBJ) t=o->dtyp; |
| t&=NQ; |
| if(zmeqto(sizetab[t],Z0)) return; |
| /*get_acc(f,p,INT);*/ |
| if(pushedacc==t3||pushedacc==t4) ierror(0); |
| if(pushedx==t3||pushedx==t4) ierror(0); |
| if(regs[ra]||regs[rax]){ |
| if(isacc(q1)||isacc(q2)||!isacc(z)){ |
| pushed=1; |
| emit(f,"\tpha\n"); |
| if(regs[rax]||regs[rx]) emit(f,"\ttxa\n\tpha\n"); |
| } |
| } |
| m=o->flags; |
| o->flags&=~DREFOBJ; |
| load_address(f,LAST_PAIR,o,POINTER); |
| o->flags=m; |
| emit(f,"\tldx\t#%d\n",bankvoffset); |
| emit(f,"\tlda\t#%d\n",cbank>=0?cbank:bankcnum); |
| sety(f,bank(o->v)); |
| emit(f,"\tjsr\t%s__bankload%d\n",idprefix,(int)zm2l(sizetab[t])); |
| yval=NOVAL; |
| o->v=&bankv; |
| o->val.vmax=l2zm((long)bankvoffset); |
| bankvoffset+=zm2l(sizetab[t]); |
| if(pushed){ |
| if(regs[rax]||regs[rx]) emit(f,"\tpla\n\ttax\n"); |
| emit(f,"\tpla\n"); |
| } |
| } |
| |
| static void preload(FILE *f,IC *p) |
| { |
| int r,mra=regs[ra],mrax=regs[rax]; |
| int bq1=-1,bq2=-1,bz=-1,sb=-1,zbuf=0; |
| |
| if(p->code==GETRETURN&&p->q1.reg==ra&&!regs[ra]) |
| regs[ra]=1; |
| |
| if(p->code==GETRETURN&&p->q1.reg==rax&&!regs[rax]) |
| regs[rax]=1; |
| |
| bankvoffset=0; |
| |
| if(!NOBANKVARS){ |
| if((p->q1.flags&(VAR|VARADR))==VAR) bq1=bank(p->q1.v); |
| if((p->q2.flags&(VAR|VARADR))==VAR) bq2=bank(p->q2.v); |
| if((p->z.flags&(VAR|VARADR))==VAR) bz=bank(p->z.v); |
| |
| if((p->q1.flags&(VAR|VARADR))==(VAR|VARADR)){ |
| r=bank(p->q1.v); |
| /*if(r>=0&&r!=cbank) ierror(0);*/ |
| } |
| |
| if((p->code==ASSIGN||p->code==PUSH)&&!zmleq(p->q2.val.vmax,l2zm(4L))){ |
| if(p->q1.flags&DREFOBJ) preload_obj(f,p,&p->q1); |
| if(p->z.flags&DREFOBJ) preload_obj(f,p,&p->z); |
| return; |
| } |
| |
| if(p->code!=CALL){ |
| /* TODO: some optimizations possible */ |
| if(bq1>=0&&bq1!=cbank){ |
| if(cbank<0&&!NOSWITCH) |
| sb=bq1; |
| else |
| load_banked(f,p,&p->q1,q1typ(p)); |
| } |
| if(bq2>=0&&bq2!=cbank){ |
| if((bq2==sb||(cbank<0&&sb<0))&&!NOSWITCH) |
| sb=bq2; |
| else |
| load_banked(f,p,&p->q2,q2typ(p)); |
| } |
| if(bz>=0&&bz!=cbank&&(p->z.flags&DREFOBJ)){ |
| if((bz==sb||(cbank<0&&sb<0))||!NOSWITCH) |
| sb=bz; |
| else |
| load_banked(f,p,&p->z,ztyp(p)); |
| } |
| |
| if(sb>=0){ |
| if(NOSWITCH) ierror(0); |
| sety(f,sb); |
| emit(f,"\tjsr\t%s__bankswitch\n",idprefix); |
| yval=NOVAL; |
| } |
| } |
| } |
| |
| if((p->q1.flags&DREFOBJ)&&ISFPOINTER(p->q1.dtyp)&&p->code!=CALL) load_far(f,p,&p->q1,q1typ(p)); |
| if((p->q2.flags&DREFOBJ)&&ISFPOINTER(p->q2.dtyp)) load_far(f,p,&p->q2,q2typ(p)); |
| |
| if(isacc(q2)){ |
| static obj o; |
| int t=q2typ(p); |
| r=get_reg(f,p,t); |
| o.flags=REG; |
| o.reg=r; |
| store_acc(f,&o,t); |
| p->q2.reg=r; |
| } |
| |
| if(p->code!=ADDRESS){ |
| preload_obj(f,p,&p->q1); |
| if((p->q1.flags&(DREFOBJ|VAR|REG))==(DREFOBJ|VAR|REG)&& |
| (p->q2.flags&(DREFOBJ|VAR|REG))==(DREFOBJ|VAR)&& |
| p->q1.v==p->q2.v){ |
| p->q2.flags|=REG; |
| p->q2.reg=p->q1.reg; |
| } |
| if((p->q1.flags&(DREFOBJ|VAR|REG))==(DREFOBJ|VAR|REG)&& |
| (p->z.flags&(DREFOBJ|VAR|REG))==(DREFOBJ|VAR)&& |
| p->q1.v==p->z.v){ |
| p->z.flags|=REG; |
| p->z.reg=p->q1.reg; |
| } |
| } |
| |
| preload_obj(f,p,&p->q2); |
| if((p->q2.flags&(DREFOBJ|VAR|REG))==(DREFOBJ|VAR|REG)&& |
| (p->z.flags&(DREFOBJ|VAR|REG))==(DREFOBJ|VAR)&& |
| p->q2.v==p->z.v){ |
| p->z.flags|=REG; |
| p->z.reg=p->q1.reg; |
| } |
| |
| |
| if((p->z.flags&DREFOBJ)&&ISFPOINTER(p->z.dtyp)) zbuf=1; |
| if((p->z.flags&(VAR|DREFOBJ))==VAR){ |
| bz=bank(p->z.v); |
| if(bz>=0&&bz!=cbank) zbuf=1; |
| } |
| |
| if(zbuf&&!NOBANKVARS){ |
| zstore=p->z; |
| p->z.flags=VAR; |
| p->z.v=&bankv; |
| p->z.val.vmax=l2zm((long)bankvoffset); |
| zstoreflag=1; |
| /*bankvoffset+=zm2l(sizetab[p->typf&NQ]);*/ |
| }else{ |
| preload_obj(f,p,&p->z); |
| |
| if(isreg(z)){ |
| r=0; |
| if(p->q1.am&&p->q1.am->base==p->z.reg){ |
| r=get_reg(f,p,POINTER); |
| cmp_get_acc(f,p,0); |
| if(!reg_pair(p->q1.am->base,&rp)) ierror(0); |
| if(!reg_pair(r,&rp2)) ierror(0); |
| emit(f,"\tlda\t%s\n",mregnames[rp.r1]); |
| emit(f,"\tsta\t%s\n",mregnames[rp2.r1]); |
| emit(f,"\tlda\t%s\n",mregnames[rp.r2]); |
| emit(f,"\tsta\t%s\n",mregnames[rp2.r2]); |
| p->q1.am->base=p->q1.reg=r; |
| }else if((p->q1.flags&(REG|DREFOBJ))==(REG|DREFOBJ)&&p->q1.reg==p->z.reg){ |
| r=get_reg(f,p,POINTER); |
| cmp_get_acc(f,p,0); |
| if(!reg_pair(p->z.reg,&rp)) ierror(0); |
| if(!reg_pair(r,&rp2)) ierror(0); |
| emit(f,"\tlda\t%s\n",mregnames[rp.r1]); |
| emit(f,"\tsta\t%s\n",mregnames[rp2.r1]); |
| emit(f,"\tlda\t%s\n",mregnames[rp.r2]); |
| emit(f,"\tsta\t%s\n",mregnames[rp2.r2]); |
| p->q1.reg=r; |
| } |
| if(p->q2.am&&p->q2.am->base==p->z.reg){ |
| if(r==0){ |
| r=get_reg(f,p,POINTER); |
| cmp_get_acc(f,p,0); |
| if(!reg_pair(p->q2.am->base,&rp)) ierror(0); |
| if(!reg_pair(r,&rp2)) ierror(0); |
| emit(f,"\tlda\t%s\n",mregnames[rp.r1]); |
| emit(f,"\tsta\t%s\n",mregnames[rp2.r1]); |
| emit(f,"\tlda\t%s\n",mregnames[rp.r2]); |
| emit(f,"\tsta\t%s\n",mregnames[rp2.r2]); |
| } |
| p->q2.am->base=p->q2.reg=r; |
| }else if((p->q2.flags&(REG|DREFOBJ))==(REG|DREFOBJ)&&p->q2.reg==p->z.reg){ |
| if(r==0){ |
| r=get_reg(f,p,POINTER); |
| cmp_get_acc(f,p,0); |
| if(!reg_pair(p->z.reg,&rp)) ierror(0); |
| if(!reg_pair(r,&rp2)) ierror(0); |
| emit(f,"\tlda\t%s\n",mregnames[rp.r1]); |
| emit(f,"\tsta\t%s\n",mregnames[rp2.r1]); |
| emit(f,"\tlda\t%s\n",mregnames[rp.r2]); |
| emit(f,"\tsta\t%s\n",mregnames[rp2.r2]); |
| } |
| p->q2.reg=r; |
| } |
| } |
| if(isacc(z)){ |
| if(isacc(q2)){ |
| if(p->q2.reg==rax){ |
| r=get_reg(f,p,INT); |
| if(!reg_pair(r,&rp)) ierror(0); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r1]); |
| emit(f,"\tstx\t%s\n",mregnames[rp.r2]); |
| }else{ |
| r=get_reg(f,p,CHAR); |
| emit(f,"\tsta\t%s\n",mregnames[r]); |
| } |
| p->q2.reg=r; |
| if(isacc(q1)) |
| p->q1.reg=r; |
| } |
| } |
| } |
| |
| reload_acc(f); |
| |
| regs[ra]=mra; |
| regs[rax]=mrax; |
| } |
| |
| |
| /* compare if two objects are the same */ |
| static int compare_objects(struct obj *o1,struct obj *o2) |
| { |
| if((o1->flags&(REG|DREFOBJ))==REG&&(o2->flags&(REG|DREFOBJ))==REG&&o1->reg==o2->reg) |
| return 1; |
| if(o1->flags==o2->flags&&o1->am==o2->am){ |
| if(!(o1->flags&VAR)||(o1->v==o2->v&&zmeqto(o1->val.vmax,o2->val.vmax))){ |
| if(!(o1->flags®)||o1->reg==o2->reg){ |
| return 1; |
| } |
| } |
| } |
| return 0; |
| } |
| |
| /* save the result (in zreg) into p->z */ |
| void save_result(FILE *f,struct IC *p) |
| { |
| ierror(0); |
| } |
| |
| /* prints an object */ |
| static void emit_obj(FILE *f,struct obj *p,int t) |
| { |
| if(p->am){ |
| if(p->am->flags==IMM_IND) |
| emit(f,"(%s),y ;am(%ld)",mregnames[p->am->base],p->am->offset); |
| else if(p->am->flags==GPR_IND) |
| emit(f,"(%s),y ;am(%s)",mregnames[p->am->base],mregnames[p->am->idx]); |
| else if(p->am->flags==ABS_IND){ |
| emit(f,"%ld",p->am->offset); |
| if(p->am->v){ |
| Var *v=p->am->v; |
| if(v->storage_class==EXTERN) |
| emit(f,"+%s%s",idprefix,v->identifier); |
| else |
| emit(f,"+%s%ld",labprefix,zm2l(v->offset)); |
| } |
| if(ISIDX(p->am->idx)) |
| emit(f,",%s ;am(%s)",mregnames[p->am->idx],mregnames[p->am->idx]); |
| else |
| emit(f,",y ;am(%s)",mregnames[p->am->idx]); |
| }else |
| ierror(0); |
| return; |
| } |
| if((p->flags&(KONST|DREFOBJ))==(KONST|DREFOBJ)){ |
| emitval(f,&p->val,p->dtyp&NU); |
| return; |
| } |
| if(p->flags&DREFOBJ) emit(f,"("); |
| if(p->flags®){ |
| emit(f,"%s",mregnames[p->reg]); |
| }else if(p->flags&VAR) { |
| if(p->v->storage_class==AUTO||p->v->storage_class==REGISTER) |
| emit(f,"(%s),y",mregnames[fp]); |
| else{ |
| if(!zmeqto(l2zm(0L),p->val.vmax)){emitval(f,&p->val,MAXINT);emit(f,"+");} |
| if(p->v->storage_class==STATIC){ |
| emit(f,"%s%ld",labprefix,zm2l(p->v->offset)); |
| }else{ |
| emit(f,"%s%s",idprefix,p->v->identifier); |
| } |
| } |
| } |
| if(p->flags&KONST){ |
| if(/*ieee&&((t&NQ)==DOUBLE||(t&NQ)==LDOUBLE)*/ISFLOAT(t)) |
| emit(f,"%s%d",labprefix,addfpconst(p,t)); |
| else |
| emitval(f,&p->val,t&NU); |
| } |
| if(p->flags&DREFOBJ) emit(f,")%s",noy?"":",y"); |
| } |
| |
| /* Test if there is a sequence of FREEREGs containing FREEREG reg. |
| Used by peephole. */ |
| static int exists_freereg(struct IC *p,int reg) |
| { |
| while(p&&(p->code==FREEREG||p->code==ALLOCREG)){ |
| if(p->code==FREEREG&&p->q1.reg==reg) return 1; |
| p=p->next; |
| } |
| return 0; |
| } |
| |
| char amode_buff[8192]; |
| char *render_amode(struct AddressingMode *am) |
| { |
| return "(amode: not implemented)"; |
| } |
| |
| char val_buff[8192]; |
| char *render_val(union atyps val) |
| { |
| snprintf(val_buff,8192,"(val: %02x...)", |
| val.vuchar); |
| return val_buff; |
| } |
| |
| char var_buff[8192]; |
| char *render_var(struct Var *v) |
| { |
| if (!v) return "<null>"; |
| snprintf(var_buff,8192,"(var id=%s)",v->identifier); |
| return var_buff; |
| } |
| |
| char obj_buff[8192]; |
| char *render_obj(struct obj o) |
| { |
| // XXX Calling render_var() can result in segfaults |
| snprintf(obj_buff,8192,"(flags=%d, reg=%d, dtype=%d, var=%s, amode=%s, val=%s)", |
| o.flags,o.reg,o.dtyp,"render_var(o.v)",render_amode(o.am),render_val(o.val)); |
| return obj_buff; |
| } |
| |
| /* search for possible addressing-modes */ |
| static void peephole(struct IC *p) |
| { |
| int c,c2,r;struct IC *p2;struct AddressingMode *am; |
| |
| fprintf(stderr,"peephole() called.\n"); |
| |
| /* |
| XXX PGS Things to consider adding here: |
| 1. Removal of dead loads when we know a register already has loaded the target we want. |
| 2. Removal of dead stores to local stack variables that never get read before returning from a function? |
| 3. Removal of SP decrement and increment, when no use of local stack is made. |
| 4. Promoting stack variables to global variables where it saves time and/or space? |
| 5. Using Z as a temporary scratch register for local variables, where it doesn't upset |
| other things? |
| */ |
| |
| |
| for(;p;p=p->next){ |
| fprintf(stderr," Instruction @ %p : ",p); |
| fprintf(stderr,"code=%d, ",p->code); |
| fprintf(stderr,"\n q1=%s, ",render_obj(p->q1)); |
| fprintf(stderr,"\n q2=%s, ",render_obj(p->q2)); |
| fprintf(stderr,"\n z=%s, ",render_obj(p->z)); |
| fprintf(stderr,"\n"); |
| |
| c=p->code; |
| if(c!=FREEREG&&c!=ALLOCREG&&(c!=SETRETURN||!isreg(q1)||p->q1.reg!=p->z.reg)) exit_label=0; |
| if(c==LABEL) exit_label=p->typf; |
| |
| /* Try const(reg) */ |
| if((c==ADDI2P||c==SUBIFP)&&isreg(z)&&(p->q2.flags&(KONST|DREFOBJ))==KONST&&!ISFPOINTER(p->typf2)){ |
| int base;zmax of;struct obj *o; |
| eval_const(&p->q2.val,p->typf); |
| if(c==SUBIFP) of=zmsub(l2zm(0L),vmax); else of=vmax; |
| if(zmleq(Z0,of)&&zmleq(of,l2zm(255L))){ |
| r=p->z.reg; |
| if(isreg(q1)&&isptr(p->q1.reg)) base=p->q1.reg; else base=r; |
| o=0; |
| for(p2=p->next;p2;p2=p2->next){ |
| c2=p2->code; |
| if(c2==CALL||c2==LABEL||(c2>=BEQ&&c2<=BRA)) break; |
| if(c2!=FREEREG&&(p2->q1.flags&(REG|DREFOBJ))==REG&&p2->q1.reg==r) break; |
| if(c2!=FREEREG&&(p2->q2.flags&(REG|DREFOBJ))==REG&&p2->q2.reg==r) break; |
| if(c2!=CALL&&(c2<LABEL||c2>BRA)/*&&c2!=ADDRESS*/){ |
| int t,mc; |
| if((c2==ASSIGN|c2==PUSH)&&(p2->typf&NQ)==CHAR&&!zmeqto(p2->q2.val.vmax,Z1)) |
| mc=1; |
| else |
| mc=0; |
| if(!p2->q1.am&&(p2->q1.flags&(REG|DREFOBJ))==(REG|DREFOBJ)&&p2->q1.reg==r){ |
| if(o||mc) break; |
| t=q1typ(p2)&NQ; |
| if(t>POINTER||ISFLOAT(t)) break; |
| o=&p2->q1; |
| } |
| if(!p2->q2.am&&(p2->q2.flags&(REG|DREFOBJ))==(REG|DREFOBJ)&&p2->q2.reg==r){ |
| if(o||mc) break; |
| t=q2typ(p2)&NQ; |
| if(t>POINTER||ISFLOAT(t)) break; |
| o=&p2->q2; |
| } |
| if(!p2->z.am&&(p2->z.flags&(REG|DREFOBJ))==(REG|DREFOBJ)&&p2->z.reg==r){ |
| if(o||mc) break; |
| t=ztyp(p2)&NQ; |
| if(t>POINTER||ISFLOAT(t)) break; |
| o=&p2->z; |
| } |
| } |
| if(c2==FREEREG||(p2->z.flags&(REG|DREFOBJ))==REG){ |
| int m; |
| if(c2==FREEREG) |
| m=p2->q1.reg; |
| else{ |
| m=p2->z.reg; |
| if(o==&p->q1||o==&p->q2) break; |
| } |
| if(m==r){ |
| if(o){ |
| o->am=am=mymalloc(sizeof(*am)); |
| am->flags=IMM_IND; |
| am->base=base; |
| am->offset=(int)zm2l(of); |
| if(isreg(q1)&&isptr(p->q1.reg)){ |
| p->code=c=NOP;p->q1.flags=p->q2.flags=p->z.flags=0; |
| }else{ |
| p->code=c=ASSIGN;p->q2.flags=0; |
| p->typf=p->typf2;p->q2.val.vmax=sizetab[p->typf2&NQ]; |
| } |
| } |
| break; |
| } |
| if(c2!=FREEREG&&m==base) break; |
| continue; |
| } |
| } |
| } |
| } |
| /* Try reg,reg */ |
| if(c==ADDI2P&&(p->typf&NU)==(UNSIGNED|CHAR)&&!ISFPOINTER(p->typf2)&&isreg(q2)&&p->q2.reg!=ra&&isreg(z)&&(isreg(q1)||p->q2.reg!=p->z.reg)){ |
| int base,idx,ind;struct obj *o; |
| r=p->z.reg;idx=p->q2.reg; |
| if(isreg(q1)) base=p->q1.reg; else base=r; |
| if((p->q1.flags&VARADR)||(p->q1.flags&(KONST|DREFOBJ))==KONST) |
| ind=0; |
| else |
| ind=1; |
| o=0; |
| for(p2=p->next;p2;p2=p2->next){ |
| c2=p2->code; |
| if(c2==CALL||c2==LABEL||(c2>=BEQ&&c2<=BRA)) break; |
| if(c2!=FREEREG&&(p2->q1.flags&(REG|DREFOBJ))==REG&&p2->q1.reg==r) break; |
| if(c2!=FREEREG&&(p2->q2.flags&(REG|DREFOBJ))==REG&&p2->q2.reg==r) break; |
| if((p2->z.flags&(REG|DREFOBJ))==REG&&p2->z.reg==idx&&idx!=r) break; |
| |
| if(c2!=CALL&&(c2<LABEL||c2>BRA)/*&&c2!=ADDRESS*/){ |
| if(!p2->q1.am&&(p2->q1.flags&(REG|DREFOBJ))==(REG|DREFOBJ)&&p2->q1.reg==r){ |
| if(o||(ind&&(q1typ(p2)&NQ)!=CHAR)) break; |
| o=&p2->q1; |
| } |
| if(!p2->q2.am&&(p2->q2.flags&(REG|DREFOBJ))==(REG|DREFOBJ)&&p2->q2.reg==r){ |
| if(o||(ind&&(q2typ(p2)&NQ)!=CHAR)) break; |
| o=&p2->q2; |
| } |
| if(!p2->z.am&&(p2->z.flags&(REG|DREFOBJ))==(REG|DREFOBJ)&&p2->z.reg==r){ |
| if(o||(ind&&(ztyp(p2)&NQ)!=CHAR)) break; |
| o=&p2->z; |
| } |
| } |
| if(c2==FREEREG||(p2->z.flags&(REG|DREFOBJ))==REG){ |
| int m; |
| if(c2==FREEREG) |
| m=p2->q1.reg; |
| else |
| m=p2->z.reg; |
| if(m==r){ |
| if(o){ |
| o->am=am=mymalloc(sizeof(*am)); |
| am->idx=idx; |
| if(ind){ |
| am->flags=GPR_IND; |
| am->base=base; |
| if(isreg(q1)){ |
| p->code=c=NOP;p->q1.flags=p->q2.flags=p->z.flags=0; |
| }else{ |
| p->code=c=ASSIGN;p->q2.flags=0; |
| p->typf=p->typf2;p->q2.val.vmax=sizetab[p->typf2&NQ]; |
| } |
| }else{ |
| am->flags=ABS_IND; |
| am->base=0; |
| eval_const(&p->q1.val,MAXINT); |
| am->offset=zm2l(vmax); |
| if(p->q1.flags&VARADR) |
| am->v=p->q1.v; |
| else |
| am->v=0; |
| p->code=c=NOP;p->q1.flags=p->q2.flags=p->z.flags=0; |
| } |
| } |
| break; |
| } |
| if(c2!=FREEREG&&m==base) break; |
| continue; |
| } |
| } |
| } |
| } |
| } |
| |
| static void pr(FILE *f,struct IC *p) |
| { |
| int r; |
| |
| if(zstoreflag){ |
| int off; |
| if(p->z.flags!=VAR||p->z.v!=&bankv) ierror(0); |
| off=(int)zm2l(p->z.val.vmax); |
| p->z=zstore; |
| get_acc(f,p,INT); |
| if(zstore.flags&DREFOBJ){ |
| if(!ISFPOINTER(zstore.dtyp)) ierror(0); |
| zstore.flags&=~DREFOBJ; |
| load_reg(f,LAST_PAIR,&zstore,POINTER); |
| if(indirect(&zstore)){ |
| do_byte3(f,"lda",&zstore,FPOINTER); |
| emit(f,"\ttay\n"); |
| }else |
| do_byte3(f,"ldy",&zstore,FPOINTER); |
| yval=NOVAL; |
| }else{ |
| load_address(f,LAST_PAIR,&zstore,p->typf); |
| r=bank(zstore.v); |
| sety(f,r>=0?r:bankcnum); |
| } |
| emit(f,"\tldx\t#%d\n",off); |
| emit(f,"\tlda\t#%d\n",cbank>=0?cbank:bankcnum); |
| emit(f,"\tjsr\t%s__bankstore%d\n",idprefix,(int)zm2l(sizetab[p->typf&NQ])); |
| yval=NOVAL; |
| zstoreflag=0; |
| } |
| |
| for(r=1;r<=MAXR;r++){ |
| if(regs[r]&8) |
| regs[r]&=~8; |
| } |
| for(r=FIRST_GPR;r<=LAST_GPR;r++){ |
| int ta=0; |
| if(regs[r]&2){ |
| if(regs[ra]&&!pushedacc){ |
| emit(f,"\ttay\n"); |
| yval=NOVAL; |
| ta=1; |
| } |
| emit(f,"\tpla\n"); |
| emit(f,"\tsta\t%s\n",mregnames[r]); |
| regs[r]&=~2; |
| } |
| if(ta) |
| emit(f,"\ttya\n"); |
| } |
| if(pushedx){ |
| emit(f,"\tldx\t%s\n",mregnames[pushedx]); |
| pushedx=0; |
| } |
| |
| reload_acc_opt(f,p->next); |
| } |
| |
| struct cmplist {struct cmplist *next;int from,to,mode;} *first_cmplist; |
| |
| static void add_cmplist(int from, int to, int mode) |
| { |
| struct cmplist *new; |
| new=mymalloc(sizeof(*new)); |
| new->next=first_cmplist; |
| new->from=from; |
| new->to=to; |
| new->mode=mode; |
| first_cmplist=new; |
| } |
| |
| static void incsp(FILE *f,long of) |
| { |
| if(of==0) return; |
| if(of==1||of==-1){ |
| static obj o; |
| o.flags=REG; |
| o.reg=sp; |
| if(of==1) |
| incmem(f,&o,INT,ADD,1); |
| else |
| incmem(f,&o,INT,SUB,1); |
| }else if(of==256){ |
| emit(f,"\tinc\t%s+1\n",mregnames[sp]); |
| }else if(of==-256){ |
| emit(f,"\tdec\t%s+1\n",mregnames[sp]); |
| }else{ |
| long abs; |
| if(of>0){ |
| abs=of; |
| emit(f,"\tclc\n"); |
| }else{ |
| abs=-of; |
| emit(f,"\tsec\n"); |
| } |
| if(abs&255){ |
| emit(f,"\tlda\t%s\n",mregnames[sp]); |
| if(of>0){ |
| emit(f,"\tadc\t#%ld\n",abs&255); |
| }else{ |
| emit(f,"\tsbc\t#%ld\n",abs&255); |
| } |
| emit(f,"\tsta\t%s\n",mregnames[sp]); |
| } |
| if((abs&0xff00)==0){ |
| if(of>0){ |
| emit(f,"\tbcc\t%s%d\n",labprefix,++label); |
| emit(f,"\tinc\t%s+1\n",mregnames[sp]); |
| emit(f,"%s%d:\n",labprefix,label); |
| }else{ |
| emit(f,"\tbcs\t%s%d\n",labprefix,++label); |
| emit(f,"\tdec\t%s+1\n",mregnames[sp]); |
| emit(f,"%s%d:\n",labprefix,label); |
| } |
| }else{ |
| emit(f,"\tlda\t%s+1\n",mregnames[sp]); |
| if(of>0) |
| emit(f,"\tadc\t#%ld\n",(abs>>8)&255); |
| else |
| emit(f,"\tsbc\t#%ld\n",(abs>>8)&255); |
| emit(f,"\tsta\t%s+1\n",mregnames[sp]); |
| } |
| } |
| } |
| |
| /* generates the function entry code */ |
| static void function_top(FILE *f,struct Var *v,long offset) |
| { |
| int i,r,of; |
| rsavesize=0; |
| libsave=1; |
| |
| if(!optsize||(v->tattr&NOCOMPRESS)) emit(f,";vcprmin=10000\n"); |
| if(vlas) emit(f,"___fo\tset\t%ld\n",(long)argsize); |
| r=0; |
| for(i=FIRST_GPR;i<=LAST_GPR;i++){ |
| if((regused[i]&&(in_isr||!regscratch[i]))||(in_isr&&function_calls&®scratch[i]&&!regsa[i])){ |
| if(i!=LAST_GPR-VOL_GPRS+1&&r==0) libsave=0; |
| rsavesize++; |
| r=1; |
| }else{ |
| if(i==LAST_GPR-VOL_GPRS+1) libsave=0; |
| r=0; |
| } |
| } |
| rscnt=rsavesize; |
| if(rscnt&&!SOFTSTACK){ |
| if(optspeed||rscnt<2) |
| rsavesize=0; |
| else if(!optsize&&rscnt<=5) |
| rsavesize=0; |
| } |
| |
| if(!special_section(f,v)){emit(f,codename);ebank(f,bank(v));if(f) section=CODE;} |
| if(v->storage_class==EXTERN){ |
| if((v->flags&(INLINEFUNC|INLINEEXT))!=INLINEFUNC) |
| emit(f,"\tglobal\t%s%s\n",idprefix,v->identifier); |
| emit(f,"%s%s:\n",idprefix,v->identifier); |
| }else |
| emit(f,"%s%ld:\n",labprefix,zm2l(v->offset)); |
| |
| offset=localsize+argsize+rsavesize; |
| |
| if(in_isr){ |
| emit(f,"\tpha\n"); |
| emit(f,"\tphx\n"); |
| emit(f,"\tphy\n"); |
| emit(f,"\tphz\n"); |
| if(offset||function_calls){ |
| emit(f,"\tlda\t%s\n",mregnames[sp]); |
| emit(f,"\tpha\n"); |
| emit(f,"\tlda\t%s+1\n",mregnames[sp]); |
| emit(f,"\tpha\n"); |
| emit(f,"\tlda\t#<(___isrstack-%ld)\n",offset); |
| emit(f,"\tsta\t%s\n",mregnames[sp]); |
| emit(f,"\tlda\t#>(___isrstack-%ld)\n",offset); |
| emit(f,"\tsta\t%s+1\n",mregnames[sp]); |
| } |
| } |
| |
| if(MAINARGS&&v->storage_class==EXTERN&&!strcmp(v->identifier,"main")&&v->vtyp->exact->count>1) |
| emit(f,"\tjsr\tinitmainargs\n"); |
| |
| yval=NOVAL; |
| of=argsize+localsize; |
| |
| if(rsavesize>0&&of+rsavesize>255){ |
| offset-=rsavesize; |
| incsp(f,-rsavesize); |
| of=0; |
| }else{ |
| incsp(f,-offset); |
| offset=0; |
| } |
| |
| |
| if(!libsave||rscnt!=rsavesize||optspeed||rscnt<=1||(rscnt<=3&&(!optsize))) |
| libsave=0; |
| |
| if(libsave){ |
| sety(f,of+rsavesize-1); |
| emit(f,"\tjsr\t%s__rsave%ld\n",idprefix,rscnt); |
| yval=of; |
| }else{ |
| for(i=FIRST_GPR;i<=LAST_GPR;i++){ |
| if((regused[i]&&(in_isr||!regscratch[i]))||(in_isr&&function_calls&®scratch[i]&&!regsa[i])){ |
| if(rscnt!=rsavesize){ |
| emit(f,"\tlda\t%s\n",mregnames[i]); |
| emit(f,"\tpha\n"); |
| }else{ |
| sety(f,of++); |
| emit(f,"\tlda\t%s\n",mregnames[i]); |
| emit(f,"\tsta\t(%s),y\n",mregnames[sp]); |
| } |
| } |
| } |
| } |
| |
| |
| |
| incsp(f,-offset); |
| |
| if(vlas){ |
| emit(f,"\tlda\t%s\n",mregnames[sp]); |
| emit(f,"\tsta\t%s\n",mregnames[fp]); |
| emit(f,"\tlda\t%s\n",mregnames[sp2]); |
| emit(f,"\tsta\t%s\n",mregnames[fp2]); |
| } |
| } |
| |
| /* generates the function exit code */ |
| static void function_bottom(FILE *f,struct Var *v,long offset) |
| { |
| int i,of,ar; |
| struct cmplist *p; |
| offset=localsize+argsize+rsavesize; |
| of=argsize+localsize; |
| |
| i=freturn(v->vtyp->next); |
| if(i==ra||i==rax) ar=1; else ar=0; |
| |
| if(rscnt!=rsavesize){ |
| if(ar&&!pushedacc){ |
| pushedacc=t4; |
| emit(f,"\tsta\t%s\n",mregnames[pushedacc]); |
| } |
| for(i=LAST_GPR;i>=FIRST_GPR;i--){ |
| if((regused[i]&&(in_isr||!regscratch[i]))||(in_isr&&function_calls&®scratch[i]&&!regsa[i])){ |
| emit(f,"\tpla\n"); |
| emit(f,"\tsta\t%s\n",mregnames[i]); |
| } |
| } |
| } |
| if(rsavesize>0&&of+rsavesize>255){ |
| if(of!=1&&ar&&!pushedacc){ |
| pushedacc=t4; |
| emit(f,"\tsta\t%s\n",mregnames[pushedacc]); |
| } |
| incsp(f,of); |
| offset-=of; |
| of=0; |
| } |
| if(rsavesize>0){ |
| if(ar&&!pushedacc){ |
| pushedacc=t4; |
| emit(f,"\tsta\t%s\n",mregnames[pushedacc]); |
| } |
| } |
| if(rsavesize){ |
| if(libsave){ |
| sety(f,of+rsavesize-1); |
| emit(f,"\tjsr\t%s__rload%ld\n",idprefix,rscnt); |
| yval=of; |
| }else{ |
| for(i=FIRST_GPR;i<=LAST_GPR;i++){ |
| if((regused[i]&&(in_isr||!regscratch[i]))||(in_isr&&function_calls&®scratch[i]&&!regsa[i])){ |
| sety(f,of++); |
| emit(f,"\tlda\t(%s),y\n",mregnames[sp]); |
| emit(f,"\tsta\t%s\n",mregnames[i]); |
| } |
| } |
| } |
| } |
| if(in_isr){ |
| if(offset||function_calls){ |
| emit(f,"\tpla\n"); |
| emit(f,"\tsta\t%s+1\n",mregnames[sp]); |
| emit(f,"\tpla\n"); |
| emit(f,"\tsta\t%s\n",mregnames[sp]); |
| } |
| }else if(offset==2&&!pushedacc){ |
| emit(f,"\tinc\t%s\n",mregnames[sp]); |
| emit(f,"\tbeq\t%s%d\n",labprefix,++label); |
| emit(f,"\tinc\t%s\n",mregnames[sp]); |
| emit(f,"\tbeq\t%s%d\n",labprefix,++label); |
| reload_acc(f); |
| emit(f,ret); |
| emit(f,"%s%d:\n",labprefix,label-1); |
| emit(f,"\tinc\t%s\n",mregnames[sp]); |
| emit(f,"%s%d:\n",labprefix,label); |
| emit(f,"\tinc\t%s+1\n",mregnames[sp]); |
| }else{ |
| if(offset!=0&&ar&&!pushedacc){ |
| pushedacc=t4; |
| emit(f,"\tsta\t%s\n",mregnames[pushedacc]); |
| } |
| incsp(f,offset); |
| } |
| |
| reload_acc(f); |
| |
| if(in_isr){ |
| emit(f,"\tplz\n"); |
| emit(f,"\tply\n"); |
| emit(f,"\tplx\n"); |
| emit(f,"\tpla\n"); |
| } |
| emit(f,ret); |
| |
| for(p=first_cmplist;p;){ |
| struct cmplist *m; |
| emit(f,"%s%d:\n",labprefix,p->from); |
| if(p->mode==JMPIND){ |
| /* indirect call */ |
| emit(f,"\tjmp\t(%s)\n",mregnames[p->to]); |
| }else{ |
| pushedacc=p->mode; |
| reload_acc(f); |
| emit(f,"\t%s\t%s%d\n",jmpinst,labprefix,p->to); |
| } |
| m=p; |
| p=p->next; |
| free(m); |
| } |
| first_cmplist=0; |
| pushedacc=0; |
| } |
| |
| /****************************************/ |
| /* End of private data and functions. */ |
| /****************************************/ |
| |
| /* Does necessary initializations for the code-generator. Gets called */ |
| /* once at the beginning and should return 0 in case of problems. */ |
| int init_cg(void) |
| { |
| int i; |
| /* Initialize some values which cannot be statically initialized */ |
| /* because they are stored in the target's arithmetic. */ |
| maxalign=l2zm(1L); |
| char_bit=l2zm(8L); |
| stackalign=l2zm(1); |
| |
| if(IEEE){ |
| ieee=1; |
| msizetab[DOUBLE]=msizetab[LDOUBLE]=l2zm(8L); |
| } |
| |
| |
| mregnames[0]=regnames[0]="noreg"; |
| for(i=FIRST_GPR;i<=LAST_GPR;i++){ |
| regnames[i]=mymalloc(10); |
| sprintf(regnames[i],"r%d",i-FIRST_GPR); |
| mregnames[i]=regnames[i]; |
| regsize[i]=l2zm(1L); |
| regtype[i]=&ctyp; |
| } |
| for(i=FIRST_PAIR;i<=LAST_PAIR;i++){ |
| int sr=(i-FIRST_PAIR)*2+FIRST_GPR; |
| regnames[i]=mymalloc(10); |
| sprintf(regnames[i],"%s/%s",mregnames[sr],mregnames[sr+1]); |
| mregnames[i]=regnames[sr]; |
| regsize[i]=l2zm(2L); |
| regtype[i]=&ityp; |
| } |
| for(i=FIRST_BIG;i<=LAST_BIG;i++){ |
| regnames[i]=mymalloc(10); |
| sprintf(regnames[i],"btmp%d",i-FIRST_BIG); |
| mregnames[i]=regnames[i]; |
| regsize[i]=msizetab[FLOAT]; |
| regtype[i]=&ftyp; |
| regsa[i]=0; |
| regscratch[i]=1; |
| } |
| for(i=FIRST_BIGP;i<=LAST_BIGP;i++){ |
| int sr=(i-FIRST_BIGP)*2+FIRST_BIG; |
| regnames[i]=mymalloc(20); |
| sprintf(regnames[i],"%s/%s",mregnames[sr],mregnames[sr+1]); |
| mregnames[i]=regnames[sr]; |
| regsize[i]=msizetab[LLONG]; |
| regtype[i]=&lltyp; |
| regsa[i]=0; |
| regscratch[i]=1; |
| } |
| |
| mregnames[ra] = regnames[ra] = "a"; |
| mregnames[rx] = regnames[rx] = "x"; |
| mregnames[ry] = regnames[ry] = "y"; |
| mregnames[rz] = regnames[rz] = "z"; |
| regsize[ra]=regsize[rx]=regsize[ry]=regsize[rz]=l2zm(1L); |
| regtype[ra]=regtype[rx]=regtype[ry]=regtype[rz]=&ctyp; |
| mregnames[sp]=regnames[sp] = "sp"; |
| mregnames[sp1]=regnames[sp1] = "sp"; |
| mregnames[sp2]=regnames[sp2] = "sp+1"; |
| |
| mregnames[rax]=regnames[rax] = "ax"; |
| regsize[rax]=regsize[sp]=l2zm(2L); |
| regtype[rax]=regtype[sp]=&ityp; |
| |
| reg_prio[ra]=reg_prio[rax]=100; |
| reg_prio[rx]=50; |
| reg_prio[rz]=50; |
| |
| mregnames[raxyz]=regnames[raxyz] = "axyz"; |
| regsize[raxyz]=l2zm(4L); |
| regtype[raxyz]=&ftyp; |
| |
| /* Use multiple ccs. */ |
| multiple_ccs=0; |
| |
| short_push=1; |
| |
| static_cse=0; |
| |
| dref_cse=1; |
| |
| /*prefer_statics=1; TODO */ |
| |
| |
| if(optsize){ |
| clist_copy_stack=2; |
| clist_copy_pointer=2; |
| clist_copy_static=2; |
| }else if(optspeed){ |
| clist_copy_stack=64; |
| clist_copy_pointer=64; |
| clist_copy_static=64; |
| }else{ |
| clist_copy_stack=8; |
| clist_copy_pointer=8; |
| clist_copy_static=8; |
| } |
| |
| /* Initialize the min/max-settings. Note that the types of the */ |
| /* host system may be different from the target system and you may */ |
| /* only use the smallest maximum values ANSI guarantees if you */ |
| /* want to be portable. */ |
| /* That's the reason for the subtraction in t_min[INT]. Long could */ |
| /* be unable to represent -2147483648 on the host system. */ |
| t_min[CHAR]=l2zm(-128L); |
| t_min[SHORT]=l2zm(-32768L); |
| t_min[LONG]=zmsub(l2zm(-2147483647L),l2zm(1L)); |
| t_min[INT]=t_min(SHORT); |
| t_min[LLONG]=zmlshift(l2zm(1L),l2zm(63L)); |
| t_min[MAXINT]=t_min(LLONG); |
| t_max[CHAR]=ul2zum(127L); |
| t_max[SHORT]=ul2zum(32767UL); |
| t_max[LONG]=ul2zum(2147483647UL); |
| t_max[INT]=t_max(SHORT); |
| t_max[LLONG]=zumrshift(zumkompl(ul2zum(0UL)),ul2zum(1UL)); |
| t_max[MAXINT]=t_max(LLONG); |
| tu_max[CHAR]=ul2zum(255UL); |
| tu_max[SHORT]=ul2zum(65535UL); |
| tu_max[LONG]=ul2zum(4294967295UL); |
| tu_max[INT]=t_max(UNSIGNED|SHORT); |
| tu_max[LLONG]=zumkompl(ul2zum(0UL)); |
| tu_max[MAXINT]=t_max(UNSIGNED|LLONG); |
| |
| /* Reserve a few registers for use by the code-generator. */ |
| /* This is not optimal but simple. */ |
| regsa[raxyz]=regsa[ry]=regsa[sp]=regsa[sp1]=regsa[sp2]=REGSA_NEVER; |
| regsa[t1]=regsa[t2]=regsa[t3]=regsa[t4]=REGSA_NEVER; |
| regscratch[ra]=regscratch[rx]=regscratch[rax]=1; |
| if(!GLOBACC) |
| regsa[ra]=/*regsa[rx]=*/regsa[rax]=REGSA_TEMPS; |
| regscratch[sp]=regscratch[sp1]=regscratch[sp2]=regscratch[ry]=regscratch[rz]=0; |
| regscratch[t1]=regscratch[t2]=regscratch[t3]=regscratch[t4]=1; |
| |
| for(i=FIRST_GPR;i<=LAST_GPR-VOL_GPRS;i++){ |
| regscratch[i]=1; |
| if(i&1) |
| regscratch[FIRST_PAIR+(i-FIRST_GPR)/2]=1; |
| } |
| |
| target_macros=marray; |
| |
| declare_builtin("__mulint16",INT,INT,FIRST_PAIR,INT,FIRST_PAIR+1,1,0); |
| declare_builtin("__muluint16",UNSIGNED|INT,UNSIGNED|INT,FIRST_PAIR,UNSIGNED|INT,FIRST_PAIR+1,1,0); |
| declare_builtin("__divuint16",UNSIGNED|INT,UNSIGNED|INT,FIRST_PAIR,UNSIGNED|INT,FIRST_PAIR+1,1,0); |
| declare_builtin("__divint16",INT,INT,FIRST_PAIR,INT,FIRST_PAIR+1,1,0); |
| declare_builtin("__moduint16",UNSIGNED|INT,UNSIGNED|INT,FIRST_PAIR,UNSIGNED|INT,FIRST_PAIR+1,1,0); |
| declare_builtin("__modint16",INT,INT,FIRST_PAIR,INT,FIRST_PAIR+1,1,0); |
| |
| declare_builtin("__mulint32",LONG,LONG,FIRST_BIG+1,LONG,FIRST_BIG+2,1,0); |
| declare_builtin("__muluint32",UNSIGNED|LONG,UNSIGNED|LONG,FIRST_BIG+1,UNSIGNED|LONG,FIRST_BIG+2,1,0); |
| declare_builtin("__divint32",LONG,LONG,FIRST_BIG,LONG,FIRST_BIG+1,1,0); |
| declare_builtin("__divuint32",UNSIGNED|LONG,UNSIGNED|LONG,FIRST_BIG,UNSIGNED|LONG,FIRST_BIG+1,1,0); |
| declare_builtin("__modint32",LONG,LONG,FIRST_BIG,LONG,FIRST_BIG+1,1,0); |
| declare_builtin("__moduint32",UNSIGNED|LONG,UNSIGNED|LONG,FIRST_BIG,UNSIGNED|LONG,FIRST_BIG+1,1,0); |
| |
| declare_builtin("__mulint64",LLONG,LLONG,0,LLONG,0,1,0); |
| declare_builtin("__addint64",LLONG,LLONG,0,LLONG,0,1,0); |
| declare_builtin("__subint64",LLONG,LLONG,0,LLONG,0,1,0); |
| declare_builtin("__andint64",LLONG,LLONG,0,LLONG,0,1,0); |
| declare_builtin("__orint64",LLONG,LLONG,0,LLONG,0,1,0); |
| declare_builtin("__eorint64",LLONG,LLONG,0,LLONG,0,1,0); |
| declare_builtin("__negint64",LLONG,LLONG,0,0,0,1,0); |
| declare_builtin("__lslint64",LLONG,LLONG,0,INT,0,1,0); |
| |
| declare_builtin("__divint64",LLONG,LLONG,0,LLONG,0,1,0); |
| declare_builtin("__divuint64",UNSIGNED|LLONG,UNSIGNED|LLONG,0,UNSIGNED|LLONG,0,1,0); |
| declare_builtin("__modint64",LLONG,LLONG,0,LLONG,0,1,0); |
| declare_builtin("__moduint64",UNSIGNED|LLONG,UNSIGNED|LLONG,0,UNSIGNED|LLONG,0,1,0); |
| declare_builtin("__lsrint64",LLONG,LLONG,0,INT,0,1,0); |
| declare_builtin("__lsruint64",UNSIGNED|LLONG,UNSIGNED|LLONG,0,INT,0,1,0); |
| declare_builtin("__cmpsint64",INT,LLONG,0,LLONG,0,1,0); |
| declare_builtin("__cmpuint64",INT,UNSIGNED|LLONG,0,UNSIGNED|LLONG,0,1,0); |
| |
| declare_builtin("__sint32toflt32",FLOAT,LONG,OLDFP?0:FIRST_BIG,0,0,1,0); |
| declare_builtin("__uint32toflt32",FLOAT,UNSIGNED|LONG,OLDFP?0:FIRST_BIG,0,0,1,0); |
| declare_builtin("__flt32tosint32",LONG,FLOAT,OLDFP?0:FIRST_BIG,0,0,1,0); |
| declare_builtin("__flt32touint32",UNSIGNED|LONG,FLOAT,OLDFP?0:FIRST_BIG,0,0,1,0); |
| declare_builtin("__sint16toflt32",FLOAT,INT,FIRST_PAIR,0,0,1,0); |
| declare_builtin("__uint16toflt32",FLOAT,UNSIGNED|INT,FIRST_PAIR,0,0,1,0); |
| declare_builtin("__flt32tosint16",INT,FLOAT,OLDFP?0:FIRST_BIG,0,0,1,0); |
| declare_builtin("__flt32touint16",UNSIGNED|INT,FLOAT,OLDFP?0:FIRST_BIG,0,0,1,0); |
| |
| declare_builtin("__sint32toflt64",DOUBLE,LONG,OLDFP?0:FIRST_BIG,0,0,1,0); |
| declare_builtin("__uint32toflt64",DOUBLE,UNSIGNED|LONG,OLDFP?0:FIRST_BIG,0,0,1,0); |
| declare_builtin("__flt64tosint32",LONG,DOUBLE,OLDFP?0:FIRST_BIGP,0,0,1,0); |
| declare_builtin("__flt64touint32",UNSIGNED|LONG,DOUBLE,OLDFP?0:FIRST_BIGP,0,0,1,0); |
| declare_builtin("__sint16toflt64",DOUBLE,INT,FIRST_PAIR,0,0,1,0); |
| declare_builtin("__uint16toflt64",DOUBLE,UNSIGNED|INT,FIRST_PAIR,0,0,1,0); |
| declare_builtin("__flt64tosint16",INT,DOUBLE,OLDFP?0:FIRST_BIGP,0,0,1,0); |
| declare_builtin("__flt64touint16",UNSIGNED|INT,DOUBLE,OLDFP?0:FIRST_BIGP,0,0,1,0); |
| |
| declare_builtin("__flt64toflt32",FLOAT,DOUBLE,OLDFP?0:FIRST_BIGP,0,0,1,0); |
| declare_builtin("__flt32toflt64",DOUBLE,FLOAT,OLDFP?0:FIRST_BIG,0,0,1,0); |
| |
| declare_builtin("__addflt32",FLOAT,FLOAT,OLDFP?0:FIRST_BIG+1,FLOAT,OLDFP?0:FIRST_BIG,1,0); |
| declare_builtin("__subflt32",FLOAT,FLOAT,OLDFP?0:FIRST_BIG+1,FLOAT,OLDFP?0:FIRST_BIG,1,0); |
| declare_builtin("__mulflt32",FLOAT,FLOAT,OLDFP?0:FIRST_BIG+1,FLOAT,OLDFP?0:FIRST_BIG,1,0); |
| declare_builtin("__divflt32",FLOAT,FLOAT,OLDFP?0:FIRST_BIG+1,FLOAT,OLDFP?0:FIRST_BIG,1,0); |
| declare_builtin("__negflt32",FLOAT,FLOAT,OLDFP?0:FIRST_BIG,0,0,1,0); |
| declare_builtin("__cmpsflt32",CHAR,FLOAT,OLDFP?0:FIRST_BIG+1,FLOAT,OLDFP?0:FIRST_BIG,1,0); |
| |
| #if 0 |
| for(i=1;i<MAXR;i++){ |
| printf("%02d %s scratch=%d ",i,regnames[i],regscratch[i]); |
| if(reg_pair(i,&rp)) |
| printf("pair(%s,%s)",regnames[rp.r1],regnames[rp.r2]); |
| printf("\n"); |
| } |
| #endif |
| |
| if(NOPEEP) nopeep=1; |
| if(CBMASCII) cbmascii=1; |
| if(ATASCII) atascii=1; |
| if(C02){ |
| c02=1; |
| has_zero_reg=1; |
| has_inc_a=1; |
| jmpinst="bra"; |
| }else |
| jmpinst="jmp"; |
| |
| for(i=0;i<=MAX_TYPE;i++){ |
| sizetab[i]=l2zm(msizetab[i]); |
| align[i]=l2zm(malign[i]); |
| } |
| |
| bankv.storage_class=EXTERN; |
| bankv.identifier="__bankv"; |
| bankv.vtyp=new_typ(); |
| bankv.vtyp->flags=CHAR; |
| |
| bankcnum=COMMONBANK; |
| |
| return 1; |
| } |
| |
| void init_db(FILE *f) |
| { |
| } |
| |
| int freturn(struct Typ *t) |
| /* Returns the register in which variables of type t are returned. */ |
| /* If the value cannot be returned in a register returns 0. */ |
| /* A pointer MUST be returned in a register. The code-generator */ |
| /* has to simulate a pseudo register if necessary. */ |
| { |
| int typ=t->flags&NQ; |
| if(ISSTRUCT(typ)||ISUNION(typ)||typ==VOID) |
| return 0; |
| if(OLDFP&&ISFLOAT(typ)) return FIRST_GPR; |
| if(typ==LONG||typ==FLOAT||ISFPOINTER(typ)||(!ieee&&(typ==DOUBLE||typ==LDOUBLE))) |
| return FIRST_BIG; |
| if(typ==LLONG||(ieee&&(typ==DOUBLE||typ==LDOUBLE))) |
| return FIRST_BIGP; |
| if(zmleq(szof(t),l2zm(1L))) |
| return ra; |
| if(zmleq(szof(t),l2zm(2L))) |
| return rax; |
| else |
| return 0; |
| } |
| |
| int reg_pair(int r,struct rpair *p) |
| /* Returns 0 if the register is no register pair. If r */ |
| /* is a register pair non-zero will be returned and the */ |
| /* structure pointed to p will be filled with the two */ |
| /* elements. */ |
| { |
| if(r>=FIRST_PAIR&&r<=LAST_PAIR){ |
| p->r1=(r-FIRST_PAIR)*2+FIRST_GPR; |
| p->r2=p->r1+1; |
| return 1; |
| }else if(r>=FIRST_BIGP&&r<=LAST_BIGP){ |
| p->r1=(r-FIRST_BIGP)*2+FIRST_BIG; |
| p->r2=p->r1+1; |
| return 1; |
| }else if(r==rax){ |
| p->r1=ra; |
| p->r2=rx; |
| return 1; |
| }else if(r==raxyz) { |
| // TODO: PGS: How do we declare a reg pair that is made of 4 regs, not 2? |
| return 0; |
| }else if(r==sp){ |
| p->r1=sp1; |
| p->r2=sp2; |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* estimate the cost-saving if object o from IC p is placed in |
| register r */ |
| int cost_savings(struct IC *p,int r,struct obj *o) |
| { |
| int c=p->code; |
| if(ISIDX(r)){ |
| if(c==ADD||c==SUB||c==ADDI2P||c==SUBIFP){ |
| if(o==&p->q2&&c!=ADDI2P) return -2; |
| }else if(c==ASSIGN){ |
| if(o==&p->q1&&indirect(&p->z)) return 1; |
| if(o==&p->z&&indirect(&p->q1)) return 1; |
| }else if(c==COMPARE){ |
| //if(o==&p->q1&&indirect(&p->q2)) return INT_MIN; |
| //if(o==&p->q2&&indirect(&p->q1)) return INT_MIN; |
| }else if(c==TEST){ |
| }else if(c==SETRETURN||c==GETRETURN){ |
| }else |
| return INT_MIN; |
| } |
| /*TODO: adapt this */ |
| if(o->flags&VKONST){ |
| return 0; |
| if(o==&p->q1&&p->code==ASSIGN&&(p->z.flags&DREFOBJ)) |
| return 4; |
| else |
| return 2; |
| } |
| if(o->flags&DREFOBJ){ |
| if(isptr(r)) |
| return 4; |
| if(r==rax) |
| return INT_MIN; |
| } |
| if(c==SETRETURN&&r==p->z.reg&&!(o->flags&DREFOBJ)) return 6; |
| if(c==GETRETURN&&r==p->q1.reg&&!(o->flags&DREFOBJ)) return 6; |
| if(r==ra) |
| return 5; |
| if(ISIDX(r)) |
| return 4; |
| if(r==rax) |
| return 2; |
| return 2; |
| } |
| |
| int regok(int r,int t,int mode) |
| /* Returns 0 if register r cannot store variables of */ |
| /* type t. If t==POINTER and mode!=0 then it returns */ |
| /* non-zero only if the register can store a pointer */ |
| /* and dereference a pointer to mode. */ |
| { |
| if(r==0) |
| return 0; |
| if(r==rax&&NORAX) |
| return 0; |
| t&=NQ; |
| if(ISCHAR(t)) |
| if(r==ra||(ISIDX(r)&&(optflags&2))||(r>=FIRST_GPR&&r<=LAST_GPR)) |
| return 1; |
| if(ISSHORT(t)){ |
| if(r==rax){ |
| if(t==POINTER&&mode<0) |
| return 1; |
| if(t!=POINTER) |
| return 1; |
| } |
| if(r>=FIRST_PAIR&&r<=LAST_PAIR) |
| return 1; |
| } |
| if(r>=FIRST_BIG&&r<=LAST_BIG){ |
| if(t==LONG||t==FLOAT||((t==DOUBLE||t==LDOUBLE)&&!ieee)) |
| return 1; |
| if(t==FPOINTER) |
| return 1; |
| } |
| if(r>=FIRST_BIGP&&r<=LAST_BIGP){ |
| if(t==LLONG||((t==DOUBLE||t==LDOUBLE)&&ieee)) |
| return 1; |
| } |
| return 0; |
| } |
| |
| int dangerous_IC(struct IC *p) |
| /* Returns zero if the IC p can be safely executed */ |
| /* without danger of exceptions or similar things. */ |
| /* vbcc may generate code in which non-dangerous ICs */ |
| /* are sometimes executed although control-flow may */ |
| /* never reach them (mainly when moving computations */ |
| /* out of loops). */ |
| /* Typical ICs that generate exceptions on some */ |
| /* machines are: */ |
| /* - accesses via pointers */ |
| /* - division/modulo */ |
| /* - overflow on signed integer/floats */ |
| { |
| int c=p->code; |
| if((p->q1.flags&DREFOBJ)||(p->q2.flags&DREFOBJ)||(p->z.flags&DREFOBJ)) |
| return 1; |
| if((c==DIV||c==MOD)&&!isconst(q2)) |
| return 1; |
| return 0; |
| } |
| |
| int must_convert(int o,int t,int const_expr) |
| /* Returns zero if code for converting np to type t */ |
| /* can be omitted. */ |
| /* On the PowerPC cpu pointers and 32bit */ |
| /* integers have the same representation and can use */ |
| /* the same registers. */ |
| { |
| int op=o&NQ,tp=t&NQ; |
| |
| if(op==tp) return 0; |
| if(ISCHAR(op)&&ISCHAR(tp)) return 0; |
| if(ISSHORT(op)&&ISSHORT(tp)) return 0; |
| if(!ieee&&ISFLOAT(op)&&ISFLOAT(tp)) return 0; |
| if(op==DOUBLE&&tp==LDOUBLE) return 0; |
| if(op==LDOUBLE&&tp==DOUBLE) return 0; |
| |
| return 1; |
| } |
| |
| void gen_ds(FILE *f,zmax size,struct Typ *t) |
| /* This function has to create <size> bytes of storage */ |
| /* initialized with zero. */ |
| { |
| if(STDSYNTAX) |
| emit(f,"\tspace\t%ld\n",zm2l(size)); |
| else |
| emit(f,"\treserve\t%ld\n",zm2l(size)); |
| newobj=0; |
| } |
| |
| void gen_align(FILE *f,zmax align) |
| /* This function has to make sure the next data is */ |
| /* aligned to multiples of <align> bytes. */ |
| { |
| if(zm2l(align)>1) emit(f,"\talign 1\n"); |
| } |
| |
| void gen_var_head(FILE *f,struct Var *v) |
| /* This function has to create the head of a variable */ |
| /* definition, i.e. the label and information for */ |
| /* linkage etc. */ |
| { |
| int constflag,b=bank(v);char *sec; |
| if(v->clist) constflag=is_const(v->vtyp); |
| if(v->storage_class==STATIC){ |
| if(ISFUNC(v->vtyp->flags)) return; |
| if(v->tattr&ZPAGE) |
| emit(f,"\tzpage\t%s%ld\n",labprefix,zm2l(v->offset)); |
| if(!special_section(f,v)){ |
| if(v->clist&&(!constflag||(g_flags[2]&USEDFLAG))){emit(f,dataname);ebank(f,b);if(f) section=DATA;} |
| if(v->clist&&constflag&&!(g_flags[2]&USEDFLAG)){emit(f,rodataname);ebank(f,b);if(f) section=RODATA;} |
| if(!v->clist){emit(f,bssname);ebank(f,b);if(f) section=BSS;} |
| } |
| gen_align(f,falign(v->vtyp)); |
| emit(f,"%s%ld:\n",labprefix,zm2l(v->offset)); |
| newobj=1; |
| } |
| if(v->storage_class==EXTERN){ |
| emit(f,"\tglobal\t%s%s\n",idprefix,v->identifier); |
| if(v->tattr&ZPAGE) |
| emit(f,"\tzpage\t%s%s\n",idprefix,v->identifier); |
| if(v->flags&(DEFINED|TENTATIVE)){ |
| if(!special_section(f,v)){ |
| if(v->clist&&(!constflag||(g_flags[2]&USEDFLAG))){emit(f,dataname);ebank(f,b);if(f) section=DATA;} |
| if(v->clist&&constflag&&!(g_flags[2]&USEDFLAG)){emit(f,rodataname);ebank(f,b);if(f) section=RODATA;} |
| if(!v->clist){emit(f,bssname);ebank(f,b);if(f) section=BSS;} |
| } |
| |
| gen_align(f,falign(v->vtyp)); |
| emit(f,"%s%s:\n",idprefix,v->identifier); |
| newobj=1; |
| } |
| } |
| } |
| |
| void gen_dc(FILE *f,int t,struct const_list *p) |
| /* This function has to create static storage */ |
| /* initialized with const-list p. */ |
| { |
| if(ISCHAR(t)) |
| emit(f,"\tbyte\t"); |
| else |
| emit(f,"\tword\t"); |
| if(!p->tree){ |
| if(ISLONG(t)||ISFLOAT(t)){ |
| if(ieee&&ISFLOAT(t)){ |
| emit_ieee(f,&p->val,t&NQ); |
| }else{ |
| eval_const(&p->val,t&NU); |
| if(ISFLOAT(t)) cnv_fp(); |
| gval.vmax=zmand(vmax,l2zm(0xffffL)); |
| emitval(f,&gval,MAXINT); |
| emit(f,","); |
| gval.vmax=zmand(zmrshift(vmax,l2zm(16L)),l2zm(0xffffL)); |
| emitval(f,&gval,MAXINT); |
| } |
| }else{ |
| if(ISFPOINTER(t)){ |
| eval_const(&p->val,t&NU); |
| emit(f,"%ld\n",(long)zm2l(vmax)&0xffff); |
| emit(f,"\tbyte\t%d\n",(int)((zm2l(vmax)>>16)&0xff)); |
| }else |
| emitval(f,&p->val,t&NU); |
| } |
| }else{ |
| emit_obj(f,&p->tree->o,t&NU); |
| if(ISFPOINTER(t)){ |
| int b; |
| if((p->tree->o.flags&(VAR|VARADR))!=(VAR|VARADR)) ierror(0); |
| b=bank(p->tree->o.v); |
| emit(f,"\n\tbyte\t%d",b>=0?b:bankcnum); |
| } |
| } |
| emit(f,"\n");newobj=0; |
| } |
| |
| |
| /* The main code-generation routine. */ |
| /* f is the stream the code should be written to. */ |
| /* p is a pointer to a doubly linked list of ICs */ |
| /* containing the function body to generate code for. */ |
| /* v is a pointer to the function. */ |
| /* offset is the size of the stackframe the function */ |
| /* needs for local variables. */ |
| |
| void gen_code(FILE *f,struct IC *p,struct Var *v,zmax offset) |
| /* The main code-generation. */ |
| { |
| int c,t,i; |
| struct IC *mi; |
| FILE *rf=f; |
| static char *dbgfile; |
| static int dbgline; |
| |
| if(vlas){ |
| fp=FPVLA_REG; |
| if(!reg_pair(fp,&rp)) ierror(0); |
| fp1=rp.r1; |
| fp2=rp.r2; |
| regused[fp]=regused[fp1]=regused[fp2]=1; |
| }else{ |
| fp=sp; |
| fp1=sp1; |
| fp2=sp2; |
| } |
| argsize=0; |
| localsize=offset; |
| if(DEBUG&1) printf("gen_code()\n"); |
| |
| cbank=bank(v); |
| |
| if(!v->fi) v->fi=new_fi(); |
| v->fi->flags|=ALL_REGS; |
| |
| for(pass=0;pass<2;pass++){ |
| |
| if(DEBUG&1) printf("pass %d\n",pass); |
| |
| if(pass==0){ |
| f=0; |
| mi=clone_ic(p); |
| }else |
| f=rf; |
| |
| for(c=1;c<=MAXR;c++) regs[c]=0; /*regsa[c];*/ |
| maxpushed=0; |
| |
| /*FIXME*/ |
| if(v->tattr&INTERRUPT){ |
| ret="\trti\n"; |
| in_isr=1; |
| }else{ |
| ret="\trts\n"; |
| in_isr=0; |
| } |
| |
| if(!nopeep) peephole(pass==0?p:mi); |
| |
| function_top(f,v,localsize); |
| |
| pushed=0; |
| |
| yval=NOVAL; |
| |
| dbgfile=0; |
| dbgline=0; |
| |
| for(p=pass==0?p:mi;p;pr(f,p),p=p->next){ |
| |
| |
| |
| if(DEBUG&1) pric2(stdout,p); |
| |
| if(debug_info){ |
| if(p->file&&p->line){ |
| if(p->file!=dbgfile||p->line!=dbgline){ |
| dbgfile=p->file; |
| dbgline=p->line; |
| emit(f,"; %d \"%s\"\n",dbgline,dbgfile); |
| } |
| } |
| } |
| |
| c=p->code;t=p->typf; |
| |
| if(c==NOP) {p->z.flags=0;continue;} |
| if(c==ALLOCREG){ |
| regs[p->q1.reg]=1; |
| if(reg_pair(p->q1.reg,&rp)){ |
| regs[rp.r1]=1; |
| regs[rp.r2]=1; |
| } |
| continue; |
| } |
| if(c==FREEREG){ |
| regs[p->q1.reg]=0; |
| if(reg_pair(p->q1.reg,&rp)){ |
| regs[rp.r1]=0; |
| regs[rp.r2]=0; |
| } |
| continue; |
| } |
| if(c==LABEL) {emit(f,"%s%d:\n",labprefix,t);yval=NOVAL;continue;} |
| if(c==BRA){ |
| yval=NOVAL; |
| if(t==exit_label&&localsize+argsize+rsavesize+rscnt==0) |
| emit(f,ret); |
| else |
| emit(f,"\t%s\t%s%d\n",jmpinst,labprefix,t); |
| continue; |
| } |
| if(c>=BEQ&&c<BRA){ |
| yval=NOVAL; |
| continue; |
| } |
| |
| if(c==MOVETOREG){ |
| p->code=c=ASSIGN; |
| p->typf=t=regtype[p->z.reg]->flags; |
| p->q2.val.vmax=sizetab[regtype[p->z.reg]->flags]; |
| } |
| if(c==MOVEFROMREG){ |
| p->code=c=ASSIGN; |
| p->typf=t=regtype[p->q1.reg]->flags; |
| p->q2.val.vmax=sizetab[regtype[p->q1.reg]->flags]; |
| } |
| if(c==CONVERT&&ISCHAR(t)&&ISCHAR(p->typf2)){ |
| p->code=c=ASSIGN; |
| p->q2.val.vmax=sizetab[CHAR]; |
| } |
| if(c==CONVERT&&msizetab[t&NQ]==3&&msizetab[p->typf2&NQ]==3){ |
| p->code=c=ASSIGN; |
| p->q2.val.vmax=sizetab[SHORT]; |
| } |
| if(c==CONVERT&&ISSHORT(t)&&ISSHORT(p->typf2)){ |
| p->code=c=ASSIGN; |
| p->q2.val.vmax=sizetab[SHORT]; |
| } |
| if(c==CONVERT&&ISLONG(t)&&ISLONG(p->typf2)){ |
| p->code=c=ASSIGN; |
| p->q2.val.vmax=sizetab[LONG]; |
| } |
| if(c==CONVERT&&ISLLONG(t)&&ISLLONG(p->typf2)){ |
| p->code=c=ASSIGN; |
| p->q2.val.vmax=sizetab[LLONG]; |
| } |
| if(c==CONVERT&&ISFLOAT(t)&&ISFLOAT(p->typf2)){ |
| p->code=c=ASSIGN; |
| p->q2.val.vmax=sizetab[t&NQ]; |
| } |
| |
| |
| /* switch commutative operands if suitable */ |
| if(c==ADD||c==MULT||c==AND||c==XOR||c==OR||(c==ADDI2P&&ISSHORT(t)&&!ISFPOINTER(p->typf2))){ |
| if(compare_objects(&p->q2,&p->z)||isacc(q2)){ |
| struct obj tmp; |
| tmp=p->q1; |
| p->q1=p->q2; |
| p->q2=tmp; |
| } |
| } |
| |
| if(c==COMPARE&&(p->q1.flags&(KONST|DREFOBJ))==KONST){ |
| obj tmp; |
| tmp=p->q1; |
| p->q1=p->q2; |
| p->q2=tmp; |
| } |
| |
| c=p->code; |
| if(c==SUBPFP) c=SUB; |
| /*if(c==ADDI2P) c=ADD;*/ |
| /*if(c==SUBIFP) c=SUB;*/ |
| |
| |
| if(c==MINUS){ |
| if(isacc(q1)&&isacc(z)){ |
| if(ISCHAR(t)){ |
| emit(f,"\tneg\n"); |
| }else{ |
| emit(f,"\teor\t#255\n"); |
| emit(f,"\tclc\n"); |
| emit(f,"\tadc\t#1\n"); |
| } |
| if(!ISCHAR(t)){ |
| emit(f,"\tpha\n"); |
| emit(f,"\ttxa\n"); |
| emit(f,"\teor\t#255\n"); |
| emit(f,"\tadc\t#0\n"); |
| emit(f,"\ttax\n"); |
| emit(f,"\tpla\n"); |
| } |
| continue; |
| } |
| p->code=c=SUB; |
| p->q2=p->q1; |
| p->q1.flags=KONST; |
| p->q1.am=0; |
| gval.vmax=Z0; |
| eval_const(&gval,MAXINT); |
| insert_const(&p->q1.val,t); |
| } |
| |
| preload(f,p); |
| |
| if(c==CONVERT){ |
| int to=q1typ(p)&NU; |
| t&=NU; |
| if(ISCHAR(t)){ |
| get_acc(f,p,CHAR); |
| load_lobyte(f,&p->q1,to); |
| store_lobyte(f,&p->z,t); |
| continue; |
| } |
| if(ISLONG(to)){ |
| if(!isacc(z)) |
| get_acc(f,p,CHAR); |
| if(zm2l(sizetab[t&NQ])==3){ |
| do_byte3(f,"lda",&p->q1,to); |
| do_byte3(f,"sta",&p->z,t); |
| } |
| if(zm2l(sizetab[t&NQ])>=2){ |
| load_hibyte(f,&p->q1,to); |
| store_hibyte(f,&p->z,t); |
| } |
| load_lobyte(f,&p->q1,to); |
| store_lobyte(f,&p->z,t); |
| continue; |
| } |
| if(ISSHORT(to)){ |
| if((t&UNSIGNED)||ISFPOINTER(t)) |
| get_acc(f,p,CHAR); |
| else |
| get_acc(f,p,SHORT); |
| load_lobyte(f,&p->q1,to); |
| store_lobyte(f,&p->z,t); |
| load_hibyte(f,&p->q1,to); |
| store_hibyte(f,&p->z,t); |
| if(ISFPOINTER(t)){ |
| int b=-1; |
| if((p->q1.flags&(VARADR|DREFOBJ))==VARADR) b=bank(p->q1.v); |
| emit(f,"\tlda\t#%d\n",b>=0?b:bankcnum); |
| do_byte3(f,"sta",&p->z,t); |
| continue; |
| } |
| if(to&UNSIGNED){ |
| if(has_zero_reg&&!indirect(&p->z)){ |
| // 65C02 Z is Zero, not a changeable register, so we can |
| // use it to clear upper bytes. |
| // This is NOT the case on 4510/M65, where Z is an index register |
| do_byte3(f,"stz",&p->z,t); |
| do_byte4(f,"stz",&p->z,t); |
| }else{ |
| emit(f,"\tlda\t#0\n"); |
| do_byte3(f,"sta",&p->z,t); |
| do_byte4(f,"sta",&p->z,t); |
| } |
| }else{ |
| emit(f,"\tldx\t#0\n"); |
| emit(f,"\tcmp\t#0\n"); |
| emit(f,"\tbpl\t%s%d\n",labprefix,++label); |
| emit(f,"\tdex\n"); |
| emit(f,"%s%d:\n",labprefix,label); |
| if(indirect(&p->z)){ |
| emit(f,"\ttxa\n"); |
| do_byte3(f,"sta",&p->z,t); |
| do_byte4(f,"sta",&p->z,t); |
| }else{ |
| do_byte3(f,"stx",&p->z,t); |
| do_byte4(f,"stx",&p->z,t); |
| } |
| } |
| continue; |
| } |
| if(ISCHAR(to)){ |
| if(to&UNSIGNED){ |
| get_acc(f,p,CHAR); |
| if(ISLONG(t)){ |
| load_lobyte(f,&p->q1,to); |
| store_lobyte(f,&p->z,t); |
| if(has_zero_reg&&!indirect(&p->z)){ |
| // 65C02 Z is Zero, not a changeable register, so we can |
| // use it to clear upper bytes. |
| // This is NOT the case on 4510/M65, where Z is an index register |
| do_hibyte(f,"stz",&p->z,t); |
| do_byte3(f,"stz",&p->z,t); |
| if(ISLONG(t)) |
| do_byte4(f,"stz",&p->z,t); |
| }else{ |
| emit(f,"\tlda\t#0\n"); |
| store_hibyte(f,&p->z,t); |
| do_byte3(f,"sta",&p->z,t); |
| if(ISLONG(t)) |
| do_byte4(f,"sta",&p->z,t); |
| } |
| continue; |
| } |
| if(isacc(z)) |
| emit(f,"\tldx\t#0\n"); |
| else if(isacc(q1)){ |
| emit(f,"\tldx\t#0\n"); |
| store_acc(f,&p->z,t); |
| continue; |
| }else{ |
| if(has_zero_reg&&!indirect(&p->z)){ |
| // 65C02 Z is Zero, not a changeable register, so we can |
| // use it to clear upper bytes. |
| // This is NOT the case on 4510/M65, where Z is an index register |
| do_hibyte(f,"stz",&p->z,t); |
| }else{ |
| emit(f,"\tlda\t#0\n"); |
| store_hibyte(f,&p->z,t); |
| } |
| } |
| load_lobyte(f,&p->q1,to); |
| store_lobyte(f,&p->z,t); |
| }else{ |
| int l=++label; |
| get_acc(f,p,SHORT); |
| emit(f,"\tldx\t#0\n"); |
| if(isreg(q1)&&p->q1.reg==ra) |
| emit(f,"\tcmp\t#0\n"); |
| else |
| load_lobyte(f,&p->q1,to); |
| emit(f,"\tbpl\t%s%d\n",labprefix,label); |
| emit(f,"\tdex\n"); |
| emit(f,"%s%d:\n",labprefix,label); |
| store_lobyte(f,&p->z,t); |
| if(indirect(&p->z)&&(!isreg(z)||p->z.reg!=rax)){ |
| emit(f,"\ttxa\n"); |
| store_hibyte(f,&p->z,t); |
| if(ISLONG(t)){ |
| do_byte3(f,"sta",&p->z,t); |
| do_byte4(f,"sta",&p->z,t); |
| } |
| }else{ |
| if(!isreg(z)||p->z.reg!=rax){ |
| emit(f,"\tstx\t"); |
| emit_hibyte(f,&p->z,t); |
| emit(f,"\n"); |
| } |
| if(ISLONG(t)){ |
| do_byte3(f,"stx",&p->z,t); |
| do_byte4(f,"stx",&p->z,t); |
| } |
| } |
| } |
| if(ISFPOINTER(t)){ |
| emit(f,"\tlda\t#%d\n",cbank>=0?cbank:bankcnum); |
| do_byte3(f,"sta",&p->z,t); |
| } |
| continue; |
| } |
| if(ISFPOINTER(to)){ |
| get_acc(f,p,CHAR); |
| if(zm2l(sizetab[t&NQ])>=3){ |
| do_byte3(f,"lda",&p->q1,to); |
| do_byte3(f,"sta",&p->z,t); |
| } |
| if(zm2l(sizetab[t&NQ])>=2){ |
| load_hibyte(f,&p->q1,to); |
| store_hibyte(f,&p->z,t); |
| } |
| load_lobyte(f,&p->q1,to); |
| store_lobyte(f,&p->z,t); |
| |
| continue; |
| } |
| ierror(0); |
| } |
| |
| if(c==KOMPLEMENT){ |
| get_acc(f,p,CHAR); |
| if(ISCHAR(t)){ |
| load_acc(f,&p->q1,t); |
| emit(f,"\teor\t#-1\n"); |
| store_acc(f,&p->z,t); |
| }else{ |
| if(isacc(q1)) |
| emit(f,"\tpha\n"); |
| if(ISLONG(t)){ |
| do_byte4(f,"lda",&p->q1,t); |
| emit(f,"\teor\t#-1\n"); |
| do_byte4(f,"sta",&p->z,t); |
| do_byte3(f,"lda",&p->q1,t); |
| emit(f,"\teor\t#-1\n"); |
| do_byte3(f,"sta",&p->z,t); |
| } |
| load_hibyte(f,&p->q1,t); |
| emit(f,"\teor\t#-1\n"); |
| store_hibyte(f,&p->z,t); |
| if(isacc(q1)) |
| emit(f,"\tpla\n"); |
| load_lobyte(f,&p->q1,t); |
| emit(f,"\teor\t#-1\n"); |
| store_lobyte(f,&p->z,t); |
| } |
| continue; |
| } |
| if(c==SETRETURN){ |
| t&=NQ; |
| if(isreg(q1)&&p->q1.reg==p->z.reg) continue; |
| if(t==LONG||t==LLONG||ISFLOAT(t)||ISFPOINTER(t)){ |
| long l=zm2l(p->q2.val.vmax); |
| int zr=p->z.reg; |
| //get_acc(f,p,t); |
| if((optsize||l>4)&&!ISFPOINTER(t)){ |
| int ind=indirect(&p->q1); |
| if(ind) load_address(f,LAST_PAIR,&p->q1,t); |
| BSET(regused,t3); |
| BSET(regused,t4); |
| sety(f,l-1); |
| emit(f,"%s%d:\n",labprefix,++label); |
| if(ind) |
| emit(f,"\tlda\t(%s),y\n",mregnames[LAST_PAIR]); |
| else{ |
| emit(f,"\tlda\t"); |
| if(!ISFLOAT(t)&&(p->q1.flags&(KONST|DREFOBJ))==KONST){ |
| emit(f,"%s%d",labprefix,addfpconst(&p->q1,t)); |
| }else |
| emit_obj(f,&p->q1,t); |
| emit(f,",y\n"); |
| } |
| emit(f,"\tsta\t%s,y\n",mregnames[zr]); |
| emit(f,"\tdey\n"); |
| emit(f,"\tbpl\t%s%d\n",labprefix,label); |
| yval=255; |
| }else{ |
| if((p->q1.flags&(REG|DREFOBJ))==(REG|DREFOBJ)){ |
| if(p->q1.reg==zr){ |
| int r=get_reg(f,p,POINTER); |
| if(r==FIRST_PAIR||r==FIRST_PAIR+1) |
| ierror(0); |
| if(!reg_pair(r,&rp2)) ierror(0); |
| emit(f,"\tlda\t%s\n",mregnames[zr]); |
| emit(f,"\tsta\t%s\n",mregnames[rp2.r1]); |
| emit(f,"\tlda\t%s+1\n",mregnames[zr]); |
| emit(f,"\tsta\t%s\n",mregnames[rp2.r2]); |
| p->q1.reg=r; |
| } |
| } |
| load_lobyte(f,&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[zr]); |
| load_hibyte(f,&p->q1,t); |
| emit(f,"\tsta\t%s+1\n",mregnames[zr]); |
| do_byte3(f,"lda",&p->q1,t); |
| emit(f,"\tsta\t%s+2\n",mregnames[zr]); |
| if(!ISFPOINTER(t)){ |
| do_byte4(f,"lda",&p->q1,t); |
| emit(f,"\tsta\t%s+3\n",mregnames[zr]); |
| } |
| /*TODO:regused OLDFP */ |
| regused[zr]=1; |
| } |
| continue; |
| } |
| //get_acc(f,p,t); |
| load_acc(f,&p->q1,t); |
| regused[ra]=1; |
| regused[rx]=1; |
| continue; |
| } |
| if(c==GETRETURN){ |
| t&=NQ; |
| if(isreg(z)&&p->q1.reg==p->z.reg) continue; |
| if(t==LONG||t==LLONG||ISFLOAT(t)||ISFPOINTER(t)){ |
| long l=zm2l(p->q2.val.vmax); |
| int qr=p->q1.reg; |
| if((optsize||l>4)&&!ISFPOINTER(t)){ |
| int ind=indirect(&p->z); |
| if(ind) load_address(f,LAST_PAIR,&p->z,t); |
| BSET(regused,t3); |
| BSET(regused,t4); |
| sety(f,l-1); |
| emit(f,"%s%d:\n",labprefix,++label); |
| emit(f,"\tlda\t%s,y\n",mregnames[qr]); |
| if(ind) |
| emit(f,"\tsta\t(%s),y\n",mregnames[LAST_PAIR]); |
| else{ |
| emit(f,"\tsta\t"); |
| emit_obj(f,&p->z,t); |
| emit(f,",y\n"); |
| } |
| emit(f,"\tdey\n"); |
| emit(f,"\tbpl\t%s%d\n",labprefix,label); |
| yval=255; |
| }else{ |
| if((p->z.reg&(REG|DREFOBJ))==(REG|DREFOBJ)){ |
| if(p->z.reg==qr) ierror(0); |
| } |
| emit(f,"\tlda\t%s\n",mregnames[qr]); |
| store_lobyte(f,&p->z,t); |
| emit(f,"\tlda\t%s+1\n",mregnames[qr]); |
| store_hibyte(f,&p->z,t); |
| emit(f,"\tlda\t%s+2\n",mregnames[qr]); |
| do_byte3(f,"sta",&p->z,t); |
| if(!ISFPOINTER(t)){ |
| emit(f,"\tlda\t%s+3\n",mregnames[qr]); |
| do_byte4(f,"sta",&p->z,t); |
| } |
| } |
| continue; |
| } |
| if(p->q1.reg) |
| store_acc(f,&p->z,t); |
| continue; |
| } |
| if(c==CALL){ |
| int reg; |
| |
| if(argsize<zm2l(p->q2.val.vmax)) argsize=zm2l(p->q2.val.vmax); |
| |
| /*FIXME*/ |
| #if 0 |
| if(stack_valid&&(p->q1.flags&(VAR|DREFOBJ))==VAR&&p->q1.v->fi&&(p->q1.v->fi->flags&ALL_STACK)){ |
| if(framesize+zum2ul(p->q1.v->fi->stack1)>stack) |
| stack=framesize+zum2ul(p->q1.v->fi->stack1); |
| }else |
| stack_valid=0; |
| #endif |
| if((p->q1.flags&(VAR|DREFOBJ))==VAR&&!strcmp("__va_start",p->q1.v->identifier)){ |
| long of=va_offset(v)+localsize+rsavesize+argsize; |
| emit(f,"\tlda\t%s\n",mregnames[fp]); |
| if(of){ |
| emit(f,"\tclc\n"); |
| if(of&255) |
| emit(f,"\tadc\t#%d\n",(of&255)); |
| } |
| emit(f,"\tldx\t%s+1\n",mregnames[fp]); |
| if(of&0xff00){ |
| emit(f,"\tpha\n"); |
| emit(f,"\ttxa\n"); |
| emit(f,"\tadc\t#%d\n",(of>>8)&255); |
| emit(f,"\ttax\n"); |
| emit(f,"\tpla\n"); |
| }else if(of){ |
| emit(f,"\tbcc\t%s%d\n",labprefix,++label); |
| emit(f,"\tinx\n"); |
| emit(f,"%s%d:\n",labprefix,label); |
| } |
| continue; |
| } |
| if((p->q1.flags&(VAR|DREFOBJ))==VAR&&p->q1.v->fi&&p->q1.v->fi->inline_asm){ |
| emit(f,";startinline\n"); |
| emit_inline_asm(f,p->q1.v->fi->inline_asm); |
| emit(f,";endinline\n"); |
| }else if(p->q1.flags&DREFOBJ){ |
| if(ISFPOINTER(p->q1.dtyp)){ |
| p->q1.flags&=~DREFOBJ; |
| load_reg(f,LAST_PAIR,&p->q1,POINTER); |
| if(indirect(&p->q1)){ |
| do_byte3(f,"lda",&p->q1,FPOINTER); |
| emit(f,"\ttay\n"); |
| }else |
| do_byte3(f,"ldy",&p->q1,FPOINTER); |
| emit(f,"\tlda\t#%d\n",cbank>=0?cbank:bankcnum); |
| emit(f,"\tjsr\t%s__bankjsr\n",idprefix); |
| yval=NOVAL; |
| }else{ |
| if(!(p->q1.flags®)) ierror(0); |
| emit(f,"\tjsr\t%s%d\n",labprefix,++label); |
| yval=NOVAL; |
| add_cmplist(label,p->q1.reg,JMPIND); |
| } |
| }else{ |
| int tbank=-1; |
| if(p->q1.flags&VAR) tbank=bank(p->q1.v); |
| if(tbank!=cbank&&tbank>=0){ |
| if(cbank>=0){ |
| load_address(f,LAST_PAIR,&p->q1,t); |
| sety(f,tbank); |
| emit(f,"\tlda\t#%d\n",cbank); |
| emit(f,"\tjsr\t%s__bankjsr\n",idprefix); |
| yval=NOVAL; |
| continue; |
| } |
| sety(f,tbank); |
| emit(f,"\tjsr\t%s__bankswitch\n",idprefix); |
| yval=NOVAL; |
| } |
| if((p->q1.flags&VAR)&&!strcmp(p->q1.v->identifier,"_fmemcpy")) |
| emit(f,"\tlda\t#%d\n",cbank>=0?cbank:bankcnum); |
| emit(f,"\tjsr\t"); |
| emit_obj(f,&p->q1,t); |
| emit(f,"\n"); |
| } |
| pushed-=zm2l(p->q2.val.vmax); |
| if(!calc_regs(p,f!=0)&&v->fi) v->fi->flags&=~ALL_REGS; |
| yval=NOVAL; |
| continue; |
| } |
| if(c==ASSIGN||c==PUSH){ |
| if(t==0) ierror(0); |
| if((p->q1.flags&(KONST|DREFOBJ))==KONST&&(t&NQ)==LLONG){ |
| int i; |
| eval_const(&p->q1.val,t); |
| for(i=0;i<8;i++){ |
| emit(f,"\tlda\t#%d\n",zm2l(vmax)&255); |
| vmax=zmrshift(vmax,l2zm(8L)); |
| if(c==PUSH||(p->z.flags&DREFOBJ)){ |
| sety(f,i+((c==PUSH)?pushed:0)); |
| emit(f,"\tsta\t(%s),y\n",(c==PUSH)?mregnames[sp]:mregnames[p->z.reg]); |
| }else{ |
| p->z.val.vmax=zmadd(p->z.val.vmax,l2zm((long)i)); |
| emit(f,"\tsta\t"); |
| emit_lobyte(f,&p->z,t); |
| emit(f,"\n"); |
| p->z.val.vmax=zmsub(p->z.val.vmax,l2zm((long)i)); |
| } |
| } |
| if(c==PUSH) pushed+=8; |
| continue; |
| } |
| |
| if(!zmleq(p->q2.val.vmax,l2zm(4L))){ |
| long len=zm2l(p->q2.val.vmax); |
| int r1,r2,loops,looplab; |
| if(len>32767) ierror(0); |
| if(!NOBANKVARS){ |
| int bq=-1,bz=-1,s=-1; |
| if((p->q1.flags&(VAR|DREFOBJ))==VAR) bq=bank(p->q1.v); |
| if((p->z.flags&(VAR|DREFOBJ))==VAR) bz=bank(p->z.v); |
| if(((p->q1.flags&DREFOBJ)&&ISFPOINTER(p->q1.dtyp))|| |
| ((p->z.flags&DREFOBJ)&&ISFPOINTER(p->z.dtyp))){ |
| far_copy(f,p); |
| continue; |
| } |
| if(cbank<0){ |
| if(bq>=0&&bz>=0){ |
| if(bq!=bz){ |
| far_copy(f,p); |
| continue; |
| } |
| s=bq; |
| }else{ |
| if(bq>=0) s=bq; |
| if(bz>=0) s=bz; |
| } |
| if(s>=0){ |
| sety(f,s); |
| emit(f,"\tjsr\t%s__bankswitch\n",idprefix); |
| yval=NOVAL; |
| } |
| }else{ |
| if((bq>=0&&bq!=cbank)||(bz>=0&&bz!=cbank)){ |
| far_copy(f,p); |
| continue; |
| } |
| } |
| } |
| get_acc(f,p,CHAR); |
| if((p->q1.flags&(DREFOBJ|KONST))==DREFOBJ){ |
| if(p->q1.flags®){ |
| r1=p->q1.reg; |
| if(!reg_pair(r1,&rp)) ierror(0); |
| if(len>128){ |
| emit(f,"\tlda\t%s\n",mregnames[rp.r1]); |
| emit(f,"\tclc\n"); |
| if(len&128) |
| emit(f,"\tadc\t#128\n"); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r1]); |
| if(len>255){ |
| emit(f,"\tlda\t%s\n",mregnames[rp.r2]); |
| emit(f,"\tadc\t#%ld\n",(len>>8)&255); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r2]); |
| }else{ |
| emit(f,"\tbcc\t%s%d\n",labprefix,++label); |
| emit(f,"\tinc\t%s\n",mregnames[rp.r2]); |
| emit(f,"%s%d:\n",labprefix,label); |
| } |
| } |
| }else |
| ierror(0); |
| }else if(!indirect(&p->q1)&&len<=128&&(p->q1.flags&(DREFOBJ|KONST))!=KONST){ |
| r1=0; |
| }else{ |
| Var *v=p->q1.v; |
| /*if((p->q1.flags&(VARADR|VAR))!=VAR) ierror(0);*/ |
| r1=get_reg(f,p,POINTER); |
| if(len>128) p->q1.val.vmax=zmadd(p->q1.val.vmax,l2zm(len&0xff80)); |
| load_address(f,r1,&p->q1,t); |
| if(len>128) p->q1.val.vmax=zmsub(p->q1.val.vmax,l2zm(len&0xff80)); |
| } |
| if((p->z.flags&(DREFOBJ|KONST))==DREFOBJ){ |
| if(p->z.flags®){ |
| r2=p->z.reg; |
| if(!reg_pair(r2,&rp)) ierror(0); |
| if(len>128){ |
| emit(f,"\tlda\t%s\n",mregnames[rp.r1]); |
| emit(f,"\tclc\n"); |
| if(len&128) |
| emit(f,"\tadc\t#128\n"); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r1]); |
| if(len>255){ |
| emit(f,"\tlda\t%s\n",mregnames[rp.r2]); |
| emit(f,"\tadc\t#%ld\n",(len>>8)&255); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r2]); |
| }else{ |
| emit(f,"\tbcc\t%s%d\n",labprefix,++label); |
| emit(f,"\tinc\t%s\n",mregnames[rp.r2]); |
| emit(f,"%s%d:\n",labprefix,label); |
| } |
| } |
| }else |
| ierror(0); |
| }else if(c==PUSH){ |
| if(len<=128&&pushed==0){ |
| r2=sp; |
| }else{ |
| r2=get_reg(f,p,POINTER); |
| if(!reg_pair(r2,&rp)) ierror(0); |
| emit(f,"\tlda\t%s\n",mregnames[sp]); |
| emit(f,"\tclc\n"); |
| if(((pushed+(len&128))&255)!=0) |
| emit(f,"\tadc\t#%ld\n",(pushed+(len&128))&255); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r1]); |
| emit(f,"\tlda\t%s\n",mregnames[sp2]); |
| emit(f,"\tadc\t#%ld\n",((pushed+len)>>8)&255); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r2]); |
| } |
| }else if(!indirect(&p->z)&&len<=128){ |
| r2=0; |
| }else{ |
| Var *v=p->z.v; |
| r2=get_reg(f,p,POINTER); |
| if(len>128) p->z.val.vmax=zmadd(p->z.val.vmax,l2zm(len&0xff80)); |
| load_address(f,r2,&p->z,t); |
| if(len>128) p->z.val.vmax=zmsub(p->z.val.vmax,l2zm(len&0xff80)); |
| } |
| if(len>128){ |
| get_acc(f,p,POINTER); /* get x */ |
| emit(f,"\tldx\t#%ld\n",((len>>7)+1)&255); |
| } |
| sety(f,(len-1)&127); |
| if((optsize&&len>4)||len>8){ |
| emit(f,"%s%d:\n",labprefix,looplab=++label); |
| if(optsize) |
| loops=1; |
| else{ |
| if((len&3)==0) |
| loops=4; |
| else if((len&1)==0) |
| loops=2; |
| else |
| loops=1; |
| } |
| }else |
| loops=len; |
| if(r1&&!reg_pair(r1,&rp)) ierror(0); |
| if(r2&&!reg_pair(r2,&rp2)) ierror(0); |
| for(i=0;i<loops;i++){ |
| if(r1) |
| emit(f,"\tlda\t(%s),y\n",mregnames[rp.r1]); |
| else{ |
| emit(f,"\tlda\t"); |
| emit_obj(f,&p->q1,t); |
| emit(f,",y\n"); |
| } |
| if(r2) |
| emit(f,"\tsta\t(%s),y\n",mregnames[rp2.r1]); |
| else{ |
| emit(f,"\tsta\t"); |
| emit_obj(f,&p->z,t); |
| emit(f,",y\n"); |
| } |
| emit(f,"\tdey\n"); |
| } |
| if(loops!=len){ |
| emit(f,"\tbpl\t%s%d\n",labprefix,label); |
| } |
| if(len>128){ |
| emit(f,"\tlda\t%s\n",mregnames[rp.r1]); |
| emit(f,"\tsec\n"); |
| emit(f,"\tsbc\t#128\n"); |
| emit(f,"\tsta\t%s\n",mregnames[rp.r1]); |
| emit(f,"\tbcs\t%s%d\n",labprefix,++label); |
| emit(f,"\tdec\t%s\n",mregnames[rp.r2]); |
| emit(f,"%s%d:\n",labprefix,label); |
| emit(f,"\tlda\t%s\n",mregnames[rp2.r1]); |
| emit(f,"\tsec\n"); |
| emit(f,"\tsbc\t#128\n"); |
| emit(f,"\tsta\t%s\n",mregnames[rp2.r1]); |
| emit(f,"\tbcs\t%s%d\n",labprefix,++label); |
| emit(f,"\tdec\t%s\n",mregnames[rp2.r2]); |
| emit(f,"%s%d:\n",labprefix,label); |
| emit(f,"\tldy\t#127\n"); |
| emit(f,"\tdex\n"); |
| emit(f,"\tbne\t%s%d\n",labprefix,looplab); |
| } |
| yval=NOVAL; |
| if(c==PUSH) |
| pushed+=zm2l(p->q2.val.vmax); |
| continue; |
| } |
| if(c==PUSH){ |
| get_acc(f,p,CHAR); |
| load_lobyte(f,&p->q1,t); |
| if(c02&&pushed==0){ |
| emit(f,"\tsta\t(%s)\n",mregnames[sp]); |
| }else{ |
| sety(f,pushed); |
| emit(f,"\tsta\t(%s),y\n",mregnames[sp]); |
| } |
| if(!zmleq(p->q2.val.vmax,Z1)){ |
| load_hibyte(f,&p->q1,t); |
| sety(f,pushed+1); |
| emit(f,"\tsta\t(%s),y\n",mregnames[sp]); |
| } |
| if(!zmleq(p->q2.val.vmax,l2zm(2L))){ |
| do_byte3(f,"lda",&p->q1,t); |
| sety(f,pushed+2); |
| emit(f,"\tsta\t(%s),y\n",mregnames[sp]); |
| } |
| if(!zmleq(p->q2.val.vmax,l2zm(3L))){ |
| do_byte4(f,"lda",&p->q1,t); |
| sety(f,pushed+3); |
| emit(f,"\tsta\t(%s),y\n",mregnames[sp]); |
| } |
| |
| pushed+=zm2l(p->q2.val.vmax); |
| continue; |
| } |
| if(c==ASSIGN){ |
| int c2m;unsigned long v; |
| if(isreg(q1)&&isreg(z)&&p->q1.reg==p->z.reg) continue; |
| if(isacc(q1)){ |
| if(p->q1.reg==rax) get_acc(f,p,CHAR); |
| store_acc(f,&p->z,t); |
| continue; |
| } |
| if(c02&&!indirect(&p->z)&&(p->q1.flags&(DREFOBJ|KONST))==KONST){ |
| eval_const(&p->q1.val,t); |
| if(ISFLOAT(t)){ |
| cnv_fp(); |
| v=zum2ul(zm2zum(vmax)); |
| }else |
| v=zum2ul(vumax); |
| c2m=1; |
| }else |
| c2m=0; |
| if(!c2m||v!=0) |
| get_acc(f,p,CHAR); |
| if(0/*ISCHAR(t)*/){ |
| load_acc(f,&p->q1,t); |
| store_acc(f,&p->z,t); |
| }else{ |
| // TODO: PGS: Use AXYZ for 32-bit copy if appropriate |
| // TOGO: PGS: Consider using AXYZ for load, even for 16 or 24-bit values |
| if(!zmleq(p->q2.val.vmax,l2zm(3L))){ |
| if(c2m&&(v&0xFF000000)==0){ |
| // 65C02 Z is Zero, not a changeable register, so we can |
| // use it to clear upper bytes. |
| // This is NOT the case on 4510/M65, where Z is an index register |
| do_byte4(f,"stz",&p->z,t); |
| }else{ |
| do_byte4(f,"lda",&p->q1,t); |
| do_byte4(f,"sta",&p->z,t); |
| } |
| } |
| if(!zmleq(p->q2.val.vmax,l2zm(2L))){ |
| if(c2m&&(v&0xFF0000)==0){ |
| // 65C02 Z is Zero, not a changeable register, so we can |
| // use it to clear upper bytes. |
| // This is NOT the case on 4510/M65, where Z is an index register |
| do_byte3(f,"stz",&p->z,t); |
| }else{ |
| do_byte3(f,"lda",&p->q1,t); |
| do_byte3(f,"sta",&p->z,t); |
| } |
| } |
| if(!zmleq(p->q2.val.vmax,l2zm(1L))){ |
| if(c2m&&(v&0xFF00)==0){ |
| // 65C02 Z is Zero, not a changeable register, so we can |
| // use it to clear upper bytes. |
| // This is NOT the case on 4510/M65, where Z is an index register |
| do_hibyte(f,"stz",&p->z,t); |
| }else{ |
| load_hibyte(f,&p->q1,t); |
| store_hibyte(f,&p->z,t); |
| } |
| } |
| if(c2m&&(v&0xFF)==0){ |
| // 65C02 Z is Zero, not a changeable register, so we can |
| // use it to clear upper bytes. |
| // This is NOT the case on 4510/M65, where Z is an index register |
| do_lobyte(f,"stz",&p->z,t); |
| }else{ |
| if(isreg(q1)&&ISIDX(p->q1.reg)){ |
| store_reg(f,p->q1.reg,&p->z,CHAR); |
| }else if(isreg(z)&&ISIDX(p->z.reg)){ |
| load_reg(f,p->z.reg,&p->q1,t); |
| }else{ |
| load_lobyte(f,&p->q1,t); |
| store_lobyte(f,&p->z,t); |
| } |
| } |
| } |
| } |
| continue; |
| } |
| if(c==ADDRESS){ |
| long o=real_offset(&p->q1); |
| get_acc(f,p,CHAR); |
| emit(f,"\tlda\t%s\n",mregnames[fp1]); |
| if(o){ |
| emit(f,"\tclc\n"); |
| if((o&255)!=0) |
| emit(f,"\tadc\t#%ld\n",real_offset(&p->q1)&255); |
| } |
| store_lobyte(f,&p->z,t); |
| if(isacc(z)) emit(f,"\tpha\n"); |
| emit(f,"\tlda\t%s\n",mregnames[fp2]); |
| if(o!=0) |
| emit(f,"\tadc\t#%ld\n",real_offset(&p->q1)>>8&255); |
| store_hibyte(f,&p->z,t); |
| if(isacc(z)) emit(f,"\tpla\n"); |
| continue; |
| } |
| |
| if(c==COMPARE||c==TEST){ |
| IC *branch=p->next; |
| int pacc=0,bc,bout; |
| while(branch){ |
| if(branch->code>=BEQ&&branch->code<BRA) |
| break; |
| if(branch->code!=FREEREG&&branch->code!=ALLOCREG&&branch->code!=NOP) |
| ierror(0); |
| branch=branch->next; |
| } |
| bc=branch->code; |
| bout=branch->typf; |
| if(c==TEST){ |
| p->q2.flags=KONST; |
| gval.vmax=Z0; |
| eval_const(&gval,MAXINT); |
| insert_const(&p->q2.val,t); |
| } |
| if((bc==BLE||bc==BGT)&&(p->q2.flags&(DREFOBJ|KONST))==KONST){ |
| eval_const(&p->q2.val,t); |
| if(!zmeqto(vmax,l2zm(255L))){ |
| vmax=zmadd(vmax,Z1); |
| gval.vmax=vmax; |
| eval_const(&gval,t); |
| insert_const(&p->q2.val,t); |
| if(bc==BLE) bc=BLT; else bc=BGE; |
| branch->code=bc; |
| } |
| } |
| if(ieee&&ISFLOAT(t)){ |
| if(!ieee) ierror(0); |
| t&=NQ; |
| if(regs[LAST_PAIR]) ierror(0); |
| regs[LAST_PAIR]=1; |
| if(regs[ra]||regs[rax]) |
| ierror(0); |
| load_address(f,LAST_PAIR,&p->q2,t); |
| BSET(regused,t3); |
| BSET(regused,t4); |
| emit(f,"\tjsr\t%s__fload%c\n",idprefix,(t==FLOAT?'s':'d')); |
| yval=NOVAL; |
| load_address(f,LAST_PAIR,&p->q1,t); |
| emit(f,"\tjsr\t%s__fcmp%c\n",idprefix,(t==FLOAT?'s':'d')); |
| yval=NOVAL; |
| regs[LAST_PAIR]=0; |
| if(bc==BLT||bc==BLE) |
| emit(f,"\tbmi\t%s%d\n",labprefix,bout); |
| else if(bc==BGT|bc==BGE) |
| emit(f,"\tbvs\t%s%d\n",labprefix,bout); |
| if(bc==BEQ||bc==BLE||bc==BGE) |
| emit(f,"\tbeq\t%s%d\n",labprefix,bout); |
| if(bc==BNE) |
| emit(f,"\tbne\t%s%d\n",labprefix,bout); |
| continue; |
| } |
| if(ISCHAR(t)){ |
| char *s=0; |
| if(isreg(q1)&&ISIDX(p->q1.reg)&&!indirect(&p->q2)&&(bc==BEQ||bc==BNE||(t&UNSIGNED))){ |
| static char buf[4]="cpr"; |
| s=buf;s[2]=mregnames[p->q1.reg][0]; |
| }else{ |
| if(pacc=cmp_get_acc(f,p,branch)) |
| bout=++label; |
| load_acc(f,&p->q1,t); |
| if(bc==BEQ||bc==BNE||(t&UNSIGNED)){ |
| s="cmp"; |
| }else{ |
| if(bc==BLT||bc==BGE) |
| emit(f,"\tsec\n"); |
| else |
| emit(f,"\tclc\n"); |
| s="sbc"; |
| } |
| } |
| if(c==TEST) |
| emit(f,"\t%s\t#0\n",s); |
| else |
| do_lobyte(f,s,&p->q2,t); |
| if(bc==BEQ) |
| emit(f,"\tbeq\t%s%d\n",labprefix,bout); |
| else if(bc==BNE) |
| emit(f,"\tbne\t%s%d\n",labprefix,bout); |
| else if(t&UNSIGNED){ |
| if(bc==BLT) |
| emit(f,"\tbcc\t%s%d\n",labprefix,bout); |
| else if(bc==BGE) |
| emit(f,"\tbcs\t%s%d\n",labprefix,bout); |
| else if(bc==BLE){ |
| emit(f,"\tbcc\t%s%d\n",labprefix,bout); |
| emit(f,"\tbeq\t%s%d\n",labprefix,bout); |
| }else if(bc==BGT){ |
| emit(f,";\n\tbeq\t%s%d\n",labprefix,++label); |
| emit(f,"\tbcs\t%s%d\n",labprefix,bout); |
| emit(f,"%s%d:\n",labprefix,label); |
| }else |
| ierror(0); |
| }else{ |
| emit(f,"\tbvc\t%s%d\n",labprefix,++label); |
| emit(f,"\teor\t#128\n"); |
| emit(f,"%s%d:\n",labprefix,label); |
| if(bc==BLT||bc==BLE) |
| emit(f,"\tbmi\t%s%d\n",labprefix,bout); |
| else |
| emit(f,"\tbpl\t%s%d\n",labprefix,bout); |
| } |
| if(pacc){ |
| reload_acc(f); |
| add_cmplist(bout,branch->typf,pacc); |
| } |
| continue; |
| }else if(bc==BEQ||bc==BNE||(t&UNSIGNED)||ISFPOINTER(t)){ |
| int in=0; |
| if(pacc=cmp_get_acc(f,p,branch)) |
| bout=++label; |
| |
| // PGS Check for special cases of comparing to constants |
| if(!(ISLONG(t)||ISFPOINTER(t)||isacc(q1))) { |
| // Is a 16-bit value |
| if (p->q2.flags&KONST) { |
| if (!(p->q2.flags&DREFOBJ)) { |
| eval_const(&p->q2.val,t); |
| if(ISFLOAT(t)) cnv_fp(); |
| if (zm2l(vmax)==0x100) { |
| if (bc==BGE) { |
| // >= $100 we can check by just reading the 2nd byte |
| // If non-zero, then we take the branch |
| do_hibyte(f,"lda",&p->q1,t); |
| emit(f,"\tbne\t%s%d\n",labprefix,bout); |
| continue; |
| } else if (bc==BLT) { |
| // <$100 we can check by just reading the 2nd byte |
| // And if zero, then we take the branch |
| do_hibyte(f,"lda",&p->q1,t); |
| emit(f,"\tbeq\t%s%d\n",labprefix,bout); |
| continue; |
| } |
| } else if (zm2l(vmax)<0x100) { |
| // Values <$100 we can do almost as simply, but we have to |
| // also check the low byte for exceptions. |
| // XXX PGS TODO |
| |
| } |
| } |
| } |
| } |
| |
| // Far-Pointers are 32-bit on M65 |
| if(ISLONG(t)||ISFPOINTER(t)){ |
| do_byte4(f,"lda",&p->q1,t); |
| if(c==TEST) |
| emit(f,"\tcmp\t#0\n"); |
| else |
| do_byte4(f,"cmp",&p->q2,t); |
| if(bc==BEQ) |
| emit(f,"\tbne\t%s%d\n",labprefix,in=++label); |
| else if(bc==BNE) |
| emit(f,"\tbne\t%s%d\n",labprefix,bout); |
| else if(bc==BLT||bc==BLE){ |
| emit(f,"\tbcc\t%s%d\n",labprefix,bout); |
| emit(f,"\tbne\t%s%d\n",labprefix,in=++label); |
| }else if(bc==BGE||bc==BGT){ |
| emit(f,"\tbcc\t%s%d\n",labprefix,in=++label); |
| emit(f,"\tbne\t%s%d\n",labprefix,bout); |
| }else |
| ierror(0); |
| } |
| if(ISLONG(t)||ISFPOINTER(t)){ |
| do_byte3(f,"lda",&p->q1,t); |
| if(c==TEST) |
| emit(f,"\tcmp\t#0\n"); |
| else |
| do_byte3(f,"cmp",&p->q2,t); |
| if(bc==BEQ) |
| emit(f,"\tbne\t%s%d\n",labprefix,in?in:(in=++label)); |
| else if(bc==BNE) |
| emit(f,"\tbne\t%s%d\n",labprefix,bout); |
| else if(bc==BLT||bc==BLE){ |
| emit(f,"\tbcc\t%s%d\n",labprefix,bout); |
| emit(f,"\tbne\t%s%d\n",labprefix,in?in:(in=++label)); |
| }else if(bc==BGE||bc==BGT){ |
| emit(f,"\tbcc\t%s%d\n",labprefix,in?in:(in=++label)); |
| emit(f,"\tbne\t%s%d\n",labprefix,bout); |
| }else |
| ierror(0); |
| } |
| if(isacc(q1)){ |
| if(!indirect(&p->q2)){ |
| do_hibyte(f,"cpx",&p->q2,t); |
| }else{ |
| int r=get_reg(f,p,CHAR); |
| emit(f,"\tpha\n"); |
| load_hibyte(f,&p->q2,t); |
| emit(f,"\tsta\t%s\n",mregnames[r]); |
| emit(f,"\tpla\n"); |
| emit(f,"\tcpx\t%s\n",mregnames[r]); |
| } |
| }else{ |
| load_hibyte(f,&p->q1,t); |
| if(c==TEST) |
| emit(f,"\tcmp\t#0\n"); |
| else |
| do_hibyte(f,"cmp",&p->q2,t); |
| } |
| if(bc==BEQ) |
| emit(f,"\tbne\t%s%d\n",labprefix,in?in:(in=++label)); |
| else if(bc==BNE) |
| emit(f,"\tbne\t%s%d\n",labprefix,bout); |
| else if(bc==BLT||bc==BLE){ |
| emit(f,"\tbcc\t%s%d\n",labprefix,bout); |
| emit(f,"\tbne\t%s%d\n",labprefix,in?in:(in=++label)); |
| }else if(bc==BGE||bc==BGT){ |
| emit(f,"\tbcc\t%s%d\n",labprefix,in?in:(in=++label)); |
| emit(f,"\tbne\t%s%d\n",labprefix,bout); |
| }else |
| ierror(0); |
| load_lobyte(f,&p->q1,t); |
| if(c==TEST) |
| emit(f,"\tcmp\t#0\n"); |
| else |
| do_lobyte(f,"cmp",&p->q2,t); |
| if(bc==BEQ) |
| emit(f,"\tbeq\t%s%d\n",labprefix,bout); |
| else if(bc==BNE) |
| emit(f,"\tbne\t%s%d\n",labprefix,bout); |
| else if(bc==BLT) |
| emit(f,"\tbcc\t%s%d\n",labprefix,bout); |
| else if(bc==BGE) |
| emit(f,"\tbcs\t%s%d\n",labprefix,bout); |
| else if(bc==BLE){ |
| emit(f,"\tbcc\t%s%d\n",labprefix,bout); |
| emit(f,"\tbeq\t%s%d\n",labprefix,bout); |
| }else if(bc==BGT){ |
| emit(f,"\tbcc\t%s%d\n",labprefix,in); |
| emit(f,"\tbne\t%s%d\n",labprefix,bout); |
| }else |
| ierror(0); |
| if(in) |
| emit(f,"%s%d:\n",labprefix,in); |
| if(pacc){ |
| reload_acc(f); |
| add_cmplist(bout,branch->typf,pacc); |
| } |
| continue; |
| }else{ |
| if(bc==BGT||bc==BLE){ |
| obj o; |
| if(isacc(q1)){ |
| int r; |
| if(pacc=cmp_get_acc(f,p,branch)) |
| bout=++label; |
| r=get_reg(f,p,CHAR); |
| emit(f,"\tsta\t%s\n",mregnames[r]); |
| load_lobyte(f,&p->q2,t); |
| emit(f,"\tcmp\t%s\n",mregnames[r]); |
| emit(f,"\tstx\t%s\n",mregnames[r]); |
| load_hibyte(f,&p->q2,t); |
| emit(f,"\tsbc\t%s\n",mregnames[r]); |
| emit(f,"\tbvc\t%s%d\n",labprefix,++label); |
| emit(f,"\teor\t#128\n"); |
| emit(f,"%s%d:\n",labprefix,label); |
| if(bc==BGT) |
| emit(f,"\tbmi\t%s%d\n",labprefix,bout); |
| else |
| emit(f,"\tbpl\t%s%d\n",labprefix,bout); |
| if(pacc){ |
| reload_acc(f); |
| add_cmplist(bout,branch->typf,pacc); |
| } |
| continue; |
| }else{ |
| o=p->q1;p->q1=p->q2;p->q2=o; |
| if(bc==BGT) bc=BLT; else bc=BGE; |
| } |
| } |
| if(pacc=cmp_get_acc(f,p,branch)) |
| bout=++label; |
| if(ISLONG(t)){ |
| load_lobyte(f,&p->q1,t); |
| do_lobyte(f,"cmp",&p->q2,t); |
| load_hibyte(f,&p->q1,t); |
| do_hibyte(f,"sbc",&p->q2,t); |
| do_byte3(f,"lda",&p->q1,t); |
| do_byte3(f,"sbc",&p->q2,t); |
| do_byte4(f,"lda",&p->q1,t); |
| do_byte4(f,"sbc",&p->q2,t); |
| }else{ |
| load_lobyte(f,&p->q1,t); |
| do_lobyte(f,"cmp",&p->q2,t); |
| load_hibyte(f,&p->q1,t); |
| do_hibyte(f,"sbc",&p->q2,t); |
| } |
| emit(f,"\tbvc\t%s%d\n",labprefix,++label); |
| emit(f,"\teor\t#128\n"); |
| emit(f,"%s%d:\n",labprefix,label); |
| if(bc==BLT) |
| emit(f,"\tbmi\t%s%d\n",labprefix,bout); |
| else if(bc==BGE) |
| emit(f,"\tbpl\t%s%d\n",labprefix,bout); |
| else |
| ierror(0); |
| if(pacc){ |
| reload_acc(f); |
| add_cmplist(bout,branch->typf,pacc); |
| } |
| continue; |
| } |
| ierror(0); |
| } |
| if((c==ADD||c==SUB||c==ADDI2P||c==SUBIFP)&&compare_objects(&p->q1,&p->z)&&(!indirect(&p->q1)||(isreg(q1)&&ISIDX(p->q1.reg)))&&isconst(q2)&&!isacc(z)){ |
| long l; |
| eval_const(&p->q2.val,q2typ(p)); |
| l=zm2l(vmax); |
| if(c==ADDI2P/*&&(t2&NQ)==POINTER*/) {c=ADD;t=UNSIGNED|INT;} |
| if(c==SUBIFP/*&&(t2&NQ)==POINTER*/) {c=SUB;t=UNSIGNED|INT;} |
| if(c==SUB||c==SUBIFP) l=-l; |
| /*TODO: allow larger types */ |
| if(l<3&&l>-3&&(t&NQ)<=INT){ |
| if(l<0){ |
| get_acc(f,p,CHAR); |
| incmem(f,&p->z,t,SUB,-l); |
| }else |
| incmem(f,&p->z,t,ADD,l); |
| continue; |
| } |
| } |
| |
| if((c==LSHIFT||c==RSHIFT)&&isreg(q1)&&isreg(z)&&isconst(q2)&&p->q1.reg==p->z.reg&&p->z.reg!=ra&&p->z.reg!=rax){ |
| long l; |
| eval_const(&p->q2.val,q2typ(p)); |
| l=zm2l(vmax); |
| /*TODO: allow larger types */ |
| if(l<5&&(t&NQ)<=INT){ |
| if(c==RSHIFT&&!(t&UNSIGNED)) |
| get_acc(f,p,CHAR); |
| incmem(f,&p->z,t,c,l); |
| continue; |
| } |
| } |
| |
| if(c==LSHIFT||c==RSHIFT){ |
| long l=-1;int loop=0,r,r2,r3,outl=0; |
| if(isconst(q2)){ |
| eval_const(&p->q2.val,q2typ(p)); |
| l=zm2l(vmax); |
| loop=0; |
| }else |
| loop=1; |
| if(l>=0&&optsize){ |
| if(c==LSHIFT&&(l&7)>6) |
| loop=1; |
| else if(c==RSHIFT&&(t&UNSIGNED)&&(l&7)>3) |
| loop=1; |
| else if(c==RSHIFT&&!(t&UNSIGNED)&&(l&7)>2) |
| loop=1; |
| } |
| |
| if(!ISCHAR(t)) |
| r=get_reg(f,p,CHAR); |
| if(ISLONG(t)){ |
| r2=get_reg(f,p,CHAR); |
| r3=get_reg(f,p,CHAR); |
| } |
| if(ISLONG(t)){ |
| get_acc(f,p,CHAR); |
| if(l>=24){ |
| if(c==LSHIFT){ |
| load_lobyte(f,&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[r3]); |
| emit(f,"\tlda\t#0\n"); |
| emit(f,"\tsta\t%s\n",mregnames[r]); |
| emit(f,"\tsta\t%s\n",mregnames[r2]); |
| }else if(c==RSHIFT&&!(t&UNSIGNED)){ |
| do_byte4(f,"lda",&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[r3]); |
| sety(f,0); |
| emit(f,"\tcmp\t#0\n"); |
| emit(f,"\tbpl\t%s%d\n",labprefix,++label); |
| emit(f,"\tdey\n"); |
| emit(f,"%s%d:\n",labprefix,label); |
| emit(f,"\tsty\t%s\n",mregnames[r]); |
| emit(f,"\tsty\t%s\n",mregnames[r2]); |
| emit(f,"\ttya\n"); |
| yval=NOVAL; |
| }else{ |
| emit(f,"\tlda\t#0\n"); |
| emit(f,"\tsta\t%s\n",mregnames[r3]); |
| emit(f,"\tsta\t%s\n",mregnames[r2]); |
| emit(f,"\tsta\t%s\n",mregnames[r]); |
| do_byte4(f,"lda",&p->q1,t); |
| |
| } |
| }else if(l>=16){ |
| if(c==LSHIFT){ |
| load_lobyte(f,&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[r2]); |
| load_hibyte(f,&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[r3]); |
| emit(f,"\tlda\t#0\n"); |
| emit(f,"\tsta\t%s\n",mregnames[r]); |
| }else if(c==RSHIFT&&!(t&UNSIGNED)){ |
| do_byte3(f,"lda",&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[r3]); |
| do_byte4(f,"lda",&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[r2]); |
| sety(f,0); |
| emit(f,"\tcmp\t#0\n"); |
| emit(f,"\tbpl\t%s%d\n",labprefix,++label); |
| emit(f,"\tdey\n"); |
| emit(f,"%s%d:\n",labprefix,label); |
| emit(f,"\tsty\t%s\n",mregnames[r]); |
| emit(f,"\ttya\n"); |
| yval=NOVAL; |
| }else{ |
| emit(f,"\tlda\t#0\n"); |
| emit(f,"\tsta\t%s\n",mregnames[r2]); |
| emit(f,"\tsta\t%s\n",mregnames[r3]); |
| do_byte4(f,"lda",&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[r]); |
| do_byte3(f,"lda",&p->q1,t); |
| |
| } |
| }else if(l>=8){ |
| if(c==LSHIFT){ |
| load_lobyte(f,&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[r]); |
| load_hibyte(f,&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[r2]); |
| do_byte3(f,"lda",&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[r3]); |
| emit(f,"\tlda\t#0\n"); |
| }else if(c==RSHIFT&&!(t&UNSIGNED)){ |
| load_hibyte(f,&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[r3]); |
| do_byte3(f,"lda",&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[r2]); |
| do_byte4(f,"lda",&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[r]); |
| sety(f,0); |
| emit(f,"\tcmp\t#0\n"); |
| emit(f,"\tbpl\t%s%d\n",labprefix,++label); |
| emit(f,"\tdey\n"); |
| emit(f,"%s%d:\n",labprefix,label); |
| emit(f,"\ttya\n"); |
| yval=NOVAL; |
| }else{ |
| emit(f,"\tlda\t#0\n"); |
| emit(f,"\tsta\t%s\n",mregnames[r3]); |
| do_byte4(f,"lda",&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[r2]); |
| do_byte3(f,"lda",&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[r]); |
| load_hibyte(f,&p->q1,t); |
| |
| } |
| }else if(c==RSHIFT&&!(t&UNSIGNED)){ |
| load_lobyte(f,&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[r3]); |
| load_hibyte(f,&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[r2]); |
| do_byte3(f,"lda",&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[r]); |
| do_byte4(f,"lda",&p->q1,t); |
| }else{ |
| do_byte4(f,"lda",&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[r3]); |
| do_byte3(f,"lda",&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[r2]); |
| load_hibyte(f,&p->q1,t); |
| emit(f,"\tsta\t%s\n",mregnames[r]); |
| load_lobyte(f,&p->q1,t); |
| } |
| }else |
| get_acc(f,p,t); |
| if(!ISLONG(t)){ |
| if(l>=8){ |
| if(!ISSHORT(t)) ierror(0); |
| if(c==LSHIFT){ |
| if(indirect(&p->q1)){ |
| load_lobyte(f,&p->q1,t); |
| emit(f,"\ttax\n"); |
| emit(f,"\tlda\t#0\n"); |
| }else{ |
| if(isacc(q1)) |
| emit(f,"\ttax\n"); |
| else |
| do_lobyte(f,"ldx",&p->q1,t); |
| emit(f,"\tlda\t#0\n"); |
| } |
| }else{ |
| load_hibyte(f,&p->q1,t); |
| emit(f,"\tldx\t#0\n"); |
| if(!(t&UNSIGNED)){ |
| emit(f,"\tcmp\t#0\n"); |
| emit(f,"\tbpl\t%s%d\n",labprefix,++label); |
| emit(f,"\tdex\n"); |
| emit(f,"%s%d:\n",labprefix,label); |
| } |
| } |
| }else |
| load_acc(f,&p->q1,t); |
| } |
| if(ISSHORT(t)) |
| emit(f,"\tstx\t%s\n",mregnames[r]); |
| if(l>=0) l&=7; |
| if(loop){ |
| if(l>=0) |
| sety(f,l); |
| else{ |
| if(indirect(&p->q2)){ |
| emit(f,"\tpha\n"); |
| load_lobyte(f,&p->q2,q2typ(p)); |
| emit(f,"\ttay\n"); |
| emit(f,"\tpla\n"); |
| emit(f,"\tcpy\t#0\n"); |
| }else{ |
| emit(f,"\tldy\t"); |
| emit_lobyte(f,&p->q2,q2typ(p)); |
| emit(f,"\n"); |
| } |
| outl=++label; |
| emit(f,"\tbeq\t%s%d\n",labprefix,outl); |
| } |
| emit(f,"%s%d:\n",labprefix,++label); |
| }else{ |
| if(ISCHAR(t)) |
| l&=7; |
| else if(ISSHORT(t)) |
| l&=15; |
| else |
| l&=31; |
| } |
| while(l>0||loop){ |
| if(c==LSHIFT){ |
| emit(f,"\tasl\n"); |
| if(!ISCHAR(t)) |
| emit(f,"\trol\t%s\n",mregnames[r]); |
| if(ISLONG(t)){ |
| emit(f,"\trol\t%s\n",mregnames[r2]); |
| emit(f,"\trol\t%s\n",mregnames[r3]); |
| } |
| }else if(t&UNSIGNED){ |
| emit(f,"\tclc\n"); |
| if(ISLONG(t)){ |
| emit(f,"\tror\t%s\n",mregnames[r3]); |
| emit(f,"\tror\t%s\n",mregnames[r2]); |
| } |
| if(!ISCHAR(t)) |
| emit(f,"\tror\t%s\n",mregnames[r]); |
| emit(f,"\tror\n"); |
| }else{ |
| if(ISLONG(t)){ |
| emit(f,"\tcmp\t#128\n"); |
| emit(f,"\tror\n"); |
| emit(f,"\tror\t%s\n",mregnames[r]); |
| emit(f,"\tror\t%s\n",mregnames[r2]); |
| emit(f,"\tror\t%s\n",mregnames[r3]); |
| }else{ |
| if(!ISCHAR(t)){ |
| emit(f,"\tcpx\t#128\n"); |
| emit(f,"\tror\t%s\n",mregnames[r]); |
| }else |
| emit(f,"\tcmp\t#128\n"); |
| emit(f,"\tror\n"); |
| } |
| } |
| if(loop){ |
| emit(f,"\tdey\n"); |
| emit(f,"\tbne\t%s%d\n",labprefix,label); |
| if(outl) emit(f,"%s%d:\n",labprefix,outl); |
| yval=0; |
| break; |
| } |
| l--; |
| } |
| if(ISLONG(t)){ |
| if(c==RSHIFT&&!(t&UNSIGNED)){ |
| do_byte4(f,"sta",&p->z,t); |
| emit(f,"\tlda\t%s\n",mregnames[r]); |
| do_byte3(f,"sta",&p->z,t); |
| emit(f,"\tlda\t%s\n",mregnames[r2]); |
| store_hibyte(f,&p->z,t); |
| emit(f,"\tlda\t%s\n",mregnames[r3]); |
| store_lobyte(f,&p->z,t); |
| }else{ |
| store_lobyte(f,&p->z,t); |
| emit(f,"\tlda\t%s\n",mregnames[r]); |
| store_hibyte(f,&p->z,t); |
| emit(f,"\tlda\t%s\n",mregnames[r2]); |
| do_byte3(f,"sta",&p->z,t); |
| emit(f,"\tlda\t%s\n",mregnames[r3]); |
| do_byte4(f,"sta",&p->z,t); |
| } |
| }else{ |
| if(!ISCHAR(t)) |
| emit(f,"\tldx\t%s\n",mregnames[r]); |
| if(ISCHAR(t)||indirect(&p->z)) |
| store_acc(f,&p->z,t); |
| else{ |
| store_lobyte(f,&p->z,t); |
| if(!isreg(z)||p->z.reg!=rax){ |
| emit(f,"\tstx\t"); |
| emit_hibyte(f,&p->z,t); |
| emit(f,"\n"); |
| } |
| } |
| } |
| continue; |
| } |
| |
| if((c>=OR&&c<=AND)||(c>=LSHIFT&&c<=MOD)||c==ADDI2P||c==SUBIFP){ |
| char *s;int t2=t,pt=p->typf2; |
| if(!isacc(z)) |
| get_acc(f,p,CHAR); |
| if(c==ADDI2P||c==SUBIFP){ |
| if(c==ADDI2P) c=ADD; else c=SUB; |
| t=UNSIGNED|INT; |
| if((pt&NQ)==POINTER&&(p->q1.flags&(KONST|DREFOBJ))==KONST){ |
| eval_const(&p->q1.val,POINTER); |
| insert_const(&p->q1.val,UNSIGNED|INT); |
| } |
| } |
| if(c>=OR&&c<=AND) |
| s=logicals[c-OR]; |
| else |
| s=arithmetics[c-LSHIFT]; |
| |
| if(ISFLOAT(t)){ |
| if(!ieee) ierror(0); |
| t&=NQ; |
| if(regs[LAST_PAIR]) ierror(0); |
| get_acc(f,p,INT); |
| regs[LAST_PAIR]=1; |
| load_address(f,LAST_PAIR,&p->q1,t); |
| BSET(regused,t3); |
| BSET(regused,t4); |
| emit(f,"\tjsr\t%s__fload%c\n",idprefix,(t==FLOAT?'s':'d')); |
| yval=NOVAL; |
| load_address(f,LAST_PAIR,&p->q2,t); |
| emit(f,"\tjsr\t%s__f%s%c\n",idprefix,ename[c],(t==FLOAT?'s':'d')); |
| yval=NOVAL; |
| load_address(f,LAST_PAIR,&p->z,t); |
| emit(f,"\tjsr\t%s__fstore%c\n",idprefix,(t==FLOAT?'s':'d')); |
| yval=NOVAL; |
| regs[LAST_PAIR]=0; |
| continue; |
| }else if(ISLONG(t)){ |
| if(c==ADD) emit(f,"\tclc\n"); |
| if(c==SUB) emit(f,"\tsec\n"); |
| load_lobyte(f,&p->q1,t); |
| do_lobyte(f,s,&p->q2,t); |
| store_lobyte(f,&p->z,t); |
| load_hibyte(f,&p->q1,t); |
| do_hibyte(f,s,&p->q2,t); |
| store_hibyte(f,&p->z,t); |
| do_byte3(f,"lda",&p->q1,t); |
| do_byte3(f,s,&p->q2,t); |
| do_byte3(f,"sta",&p->z,t); |
| do_byte4(f,"lda",&p->q1,t); |
| do_byte4(f,s,&p->q2,t); |
| do_byte4(f,"sta",&p->z,t); |
| continue; |
| }else if(ISCHAR(t)){ |
| load_acc(f,&p->q1,t); |
| if(has_inc_a&&(c==ADD||c==SUB)&&(p->q2.flags&(KONST|DREFOBJ))==KONST){ |
| eval_const(&p->q2.val,t); |
| if(zmeqto(vmax,Z1)||zmeqto(vmax,l2zm(2L))){ |
| if(zmeqto(vmax,l2zm(2L))) |
| emit(f,"\t%s\n",c==ADD?"ina":"dea"); |
| emit(f,"\t%s\n",c==ADD?"ina":"dea"); |
| store_acc(f,&p->z,t); |
| continue; |
| } |
| } |
| if(c==ADD) emit(f,"\tclc\n"); |
| if(c==SUB) emit(f,"\tsec\n"); |
| if(isreg(q2)&&ISIDX(p->q2.reg)){ |
| int r=get_reg(f,p,CHAR); |
| emit(f,"\tst%s\t%s\n",mregnames[p->q2.reg],mregnames[r]); |
| p->q2.flags=REG; |
| p->q2.reg=r; |
| } |
| do_lobyte(f,s,&p->q2,t); |
| store_acc(f,&p->z,t); |
| }else if(c==ADD||c==SUB){ |
| int a,r;long l=1; |
| if(isconst(q2)){ |
| eval_const(&p->q2.val,t2); |
| l=zm2l(vmax); |
| l&=0xff00; |
| } |
| if(isreg(z)&&p->z.reg==rax) a=1; else a=0; |
| if((t2&NU)==CHAR&&(p->q2.flags&(KONST|DREFOBJ))!=KONST){ |
| emit(f,"\tldx\t#0\n"); |
| } |
| if((t2&NU)==CHAR&&(p->q2.flags&(KONST|DREFOBJ))!=KONST){ |
| load_lobyte(f,&p->q2,t); |
| emit(f,"\tbpl\t%s%d\n",labprefix,++label); |
| emit(f,"\tdex\n"); |
| emit(f,"%s%d:\n",labprefix,label); |
| if(c==ADD){ |
| if(c==ADD) emit(f,"\tclc\n"); else emit(f,"\tsec\n"); |
| do_lobyte(f,s,&p->q1,t); |
| if(isacc(z)) |
| emit(f,"\tpha\n"); |
| else |
| store_lobyte(f,&p->z,t); |
| emit(f,"\ttxa\n"); |
| do_hibyte(f,s,&p->q1,t); |
| store_hibyte(f,&p->z,t); |
| if(ISFPOINTER(pt)&&!compare_objects(&p->q1,&p->z)){ |
| do_byte3(f,"lda",&p->q1,pt); |
| do_byte3(f,"sta",&p->z,pt); |
| } |
| if(isacc(z)) |
| emit(f,"\tpla\n"); |
| continue; |
| } |
| r=get_reg(f,p,CHAR); |
| emit(f,"\tstx\t%s\n",mregnames[r]); |
| } |
| load_lobyte(f,&p->q1,t); |
| if(c==ADD) emit(f,"\tclc\n"); else emit(f,"\tsec\n"); |
| do_lobyte(f,s,&p->q2,t2); |
| store_lobyte(f,&p->z,t); |
| if(l==0&&isreg(q1)&&isreg(z)&&p->q1.reg==p->z.reg){ |
| if(c==ADD){ |
| emit(f,"\tbcc\t%s%d\n",labprefix,++label); |
| if(a) |
| emit(f,"\tinx\n"); |
| else{ |
| /*if(!reg_pair(p->z.reg,&rp)) ierror(0);*/ |
| emit(f,"\tinc\t%s+1\n",mregnames[p->z.reg]); |
| } |
| }else{ |
| emit(f,"\tbcs\t%s%d\n",labprefix,++label); |
| if(a) |
| emit(f,"\tdex\n"); |
| else{ |
| if(!reg_pair(p->z.reg,&rp)) ierror(0); |
| emit(f,"\tdec\t%s\n",mregnames[rp.r2]); |
| } |
| } |
| emit(f,"%s%d:\n",labprefix,label); |
| }else{ |
| if(a==1) emit(f,"\tpha\n"); |
| if((t2&NQ)==CHAR){ |
| if(t2&UNSIGNED){ |
| load_hibyte(f,&p->q1,t); |
| emit(f,"\t%s\t#0\n",s); |
| }else{ |
| load_hibyte(f,&p->q1,t); |
| if((p->q2.flags&(KONST|DREFOBJ))==KONST){ |
| eval_const(&p->q2.val,t2); |
| if(zmleq(Z0,vmax)) |
| emit(f,"\t%s\t#0\n",s); |
| else |
| emit(f,"\t%s\t#255\n",s); |
| }else{ |
| emit(f,"\t%s\t%s\n",s,mregnames[r]); |
| } |
| } |
| }else{ |
| load_hibyte(f,&p->q1,t); |
| do_hibyte(f,s,&p->q2,t2); |
| } |
| store_hibyte(f,&p->z,t); |
| if(a==1) emit(f,"\tpla\n"); |
| if(ISFPOINTER(pt)&&p->code!=SUBPFP){ |
| if(!compare_objects(&p->q1,&p->z)){ |
| do_byte3(f,"lda",&p->q1,FPOINTER); |
| do_byte3(f,"sta",&p->z,FPOINTER); |
| } |
| } |
| } |
| }else{ |
| if(isacc(q1)) |
| emit(f,"\tpha\n"); |
| load_hibyte(f,&p->q1,t); |
| do_hibyte(f,s,&p->q2,t); |
| store_hibyte(f,&p->z,t); |
| if(isacc(q1)) |
| emit(f,"\tpla\n"); |
| load_lobyte(f,&p->q1,t); |
| do_lobyte(f,s,&p->q2,t); |
| store_lobyte(f,&p->z,t); |
| } |
| continue; |
| } |
| pric2(stdout,p); |
| ierror(0); |
| } |
| |
| function_bottom(f,v,localsize); |
| |
| for(c=1;c<=MAXR;c++){ |
| if(regsa[c]||regused[c]){ |
| BSET(regs_modified,c); |
| } |
| } |
| |
| if(stack_valid){ |
| if(!v->fi) v->fi=new_fi(); |
| v->fi->flags|=ALL_STACK; |
| v->fi->stack1=stack; |
| } |
| } |
| |
| free_IC(mi); |
| |
| emit(f,"; stacksize=%lu%s\n",zum2ul(stack),stack_valid?"":"+??"); |
| } |
| |
| int shortcut(int code,int typ) |
| { |
| if(code==COMPARE/*||code==MULT*/||code==ADD||code==SUB||code==AND||code==OR||code==XOR||code==LSHIFT||code==RSHIFT||code==MINUS||code==KOMPLEMENT||code==NEGATION) |
| return 1; |
| |
| return 0; |
| } |
| |
| static int fattr(type *p,char *s) |
| { |
| if(p->attr&&strstr(p->attr,s)) |
| return 1; |
| if(p->next) |
| return fattr(p->next,s); |
| else |
| return 0; |
| } |
| |
| int reg_parm(struct reg_handle *m, struct Typ *t,int vararg,struct Typ *d) |
| { |
| int f; |
| |
| if(vararg) |
| return 0; |
| f=t->flags&NQ; |
| if(OLDFP&&ISFLOAT(f)) return 0; |
| if(d&&fattr(d,"__stackparms__")) |
| return 0; |
| if(d&&fattr(d,"__cc65__")){ |
| m->regs++; |
| printf("arg=%d cnt=%d\n",m->regs,d->exact->count); |
| if(m->regs==d->exact->count-1){ |
| if(ISCHAR(t->flags)) |
| return ra; |
| if(ISSHORT(t->flags)) |
| return rax; |
| } |
| return 0; |
| } |
| if(ISCHAR(f)){ |
| if(!t->exact){ |
| if(m->regs>=GPR_ARGS-1) |
| return 0; |
| f=FIRST_GPR+m->regs; |
| m->regs+=2; |
| return f; |
| }else{ |
| if(m->regs>=GPR_ARGS) |
| return 0; |
| else |
| return FIRST_GPR+m->regs++; |
| } |
| } |
| if(ISSHORT(f)||f==POINTER){ |
| if(m->regs>=GPR_ARGS-1) |
| return 0; |
| else{ |
| if(m->regs&1) m->regs+=1; |
| m->regs+=2; |
| return FIRST_PAIR+m->regs/2-1; |
| } |
| } |
| if(f==FPOINTER||f==LONG||f==FLOAT||(!ieee&&(f==DOUBLE||f==LDOUBLE))){ |
| if(m->bregs>=4) |
| return 0; |
| else |
| return FIRST_BIG+m->bregs++; |
| } |
| if(f==LLONG||(ieee&&(f==DOUBLE||f==LDOUBLE))){ |
| if(m->bregs>=3) |
| return 0; |
| else{ |
| if(m->bregs&1) m->bregs++; |
| m->bregs+=2; |
| return FIRST_BIGP+m->bregs/2-1; |
| } |
| } |
| return 0; |
| } |
| |
| int handle_pragma(const char *s) |
| { |
| static char sec[SECLEN]; |
| int i; |
| if(sscanf(s,"section %127s",sec)==1){ |
| if(!strcmp(sec,"default")) |
| use_sec=0; |
| else |
| use_sec=sec; |
| return 1; |
| } |
| if(sscanf(s,"bank %d",&i)==1){ |
| use_bank=i; |
| return 1; |
| } |
| } |
| void cleanup_cg(FILE *f) |
| { |
| int i; |
| struct fpconstlist *p=firstfpc; |
| |
| if(f&&p){ |
| emit(f,rodataname);emit(f,"\n"); |
| section=RODATA; |
| } |
| while(p=firstfpc){ |
| emit(f,"%s%d:\n\tword\t",labprefix,p->label); |
| if(ieee) |
| emit_ieee(f,&p->val,p->t); |
| else{ |
| int words=zm2l(sizetab[p->t&NQ])/2; |
| eval_const(&p->val,p->t); |
| if(ISFLOAT(p->t)) cnv_fp(); |
| for(i=0;i<words;i++){ |
| emit(f,"%ld",zm2l(vmax)&0xffff); |
| if(i<words-1){emit(f,",");vmax=zmrshift(vmax,l2zm(16L));} |
| } |
| emit(f,"\n"); |
| /*emit(f,"%ld,%ld\n",zm2l(vmax)&0xffff,zm2l(zmrshift(vmax,l2zm(16L)))&0xffff);*/ |
| } |
| firstfpc=p->next; |
| free(p); |
| } |
| |
| emit(f,"\tzpage\t%s\n",mregnames[sp]); |
| for(i=FIRST_GPR;i<=LAST_GPR;i++) |
| emit(f,"\tzpage\t%s\n",mregnames[i]); |
| for(i=FIRST_BIG;i<=LAST_BIG;i++) |
| emit(f,"\tzpage\t%s\n",mregnames[i]); |
| |
| } |
| void cleanup_db(FILE *f) |
| { |
| if(f) section=-1; |
| } |
| |
| static char *zops[]={ |
| "adc","and","asl","bit","eor","lda","ora", |
| "tax","txa","tay","tya","sbc"}; |
| |
| static int setszflag(char *op) |
| { |
| int i; |
| for(i=0;i<sizeof(zops)/sizeof(zops[0]);i++) |
| if(!strcmp(op,zops[i])) |
| return 1; |
| return 0; |
| } |
| |
| static char *zxops[]={ |
| "tax","txa","ldx","inx","dex"}; |
| |
| static int setszxflag(char *op) |
| { |
| int i; |
| for(i=0;i<sizeof(zxops)/sizeof(zxops[0]);i++) |
| if(!strcmp(op,zxops[i])) |
| return 1; |
| return 0; |
| } |
| |
| enum peepf { NEEDSAME = 1, REMOVE1ST = 2}; |
| struct peeps {char *s1,*s2,*r;enum peepf flags;}; |
| |
| |
| |
| int emit_peephole(void) |
| { |
| int entries,i,j; |
| char *asmline[EMIT_BUF_DEPTH]; |
| char buf1[1024],buf2[1024]; |
| char op1[8],op2[8]; |
| static char ca[1024],cx[1024],cy[1024],cz[1024]; |
| static int rm,disabled; |
| |
| fprintf(stderr,"Called emit_peephole()\n"); |
| |
| static struct peeps elim[]={ |
| "lda","sta",0,NEEDSAME, |
| "ldx","stx",0,NEEDSAME, |
| "sta","sta",0,NEEDSAME, |
| "stx","stx",0,NEEDSAME, |
| "sta","lda",0,NEEDSAME, |
| "stx","ldx",0,NEEDSAME, |
| "txa","tax",0,0, |
| "tax","txa",0,0, |
| "lda","lda",0,REMOVE1ST, |
| "ldx","ldx",0,REMOVE1ST, |
| "ldy","ldy",0,REMOVE1ST, |
| "ldz","ldz",0,REMOVE1ST, |
| "lda","pla",0,REMOVE1ST, |
| "lda","txa",0,REMOVE1ST, |
| "lda","tya",0,REMOVE1ST, |
| "ldx","tax",0,REMOVE1ST, |
| "ldy","tay",0,REMOVE1ST, |
| "tay","ldy",0,REMOVE1ST, |
| "taz","ldz",0,REMOVE1ST, |
| "tax","ldx",0,REMOVE1ST, |
| "txa","lda",0,REMOVE1ST, |
| "tya","lda",0,REMOVE1ST, |
| "tza","lda",0,REMOVE1ST, |
| "lda","ldx","\ttax\n",NEEDSAME, |
| "lda","ldy","\ttay\n",NEEDSAME, |
| "ldx","lda","\ttxa\n",NEEDSAME, |
| "ldy","lda","\ttya\n",NEEDSAME, |
| "sta","ldx","\ttax\n",NEEDSAME, |
| "sta","ldy","\ttay\n",NEEDSAME, |
| "stx","lda","\ttxa\n",NEEDSAME, |
| "sty","lda","\ttya\n",NEEDSAME, |
| |
| }; |
| |
| if(nopeep) return 0; |
| |
| i=emit_l; |
| if(emit_f==0) |
| entries=i-emit_f+1; |
| else |
| entries=EMIT_BUF_DEPTH; |
| asmline[0]=emit_buffer[i]; |
| |
| if(!strcmp(asmline[0],";startinline\n")) disabled=1; |
| if(!strcmp(asmline[0],";endinline\n")) disabled=0; |
| if(disabled) return 0; |
| |
| buf1[0]=0;op1[0]=0; |
| if((j=sscanf(asmline[0]," %6s %999s",op1,buf1))>=1){ |
| printf("a=%s x=%s y=%s, z=%s\n",ca,cx,cy,cz); |
| printf("\t\t%s %s\n",op1,buf1); |
| if(!strcmp(op1,"sta")) { |
| // Work out when we are accessing variables on the stack |
| if (!strcmp(buf1,"(sp),y")) { |
| // We invalidate this when Y changes |
| snprintf(ca,1024,"(sp),y",cy); |
| } |
| } else if(!strcmp(op1,"sta")){ |
| // Remove writes to wherever A was loaded from |
| if (!strcmp(buf1,ca)) { |
| remove_asm(); |
| return rm=1; |
| } |
| } else if(!strcmp(op1,"lda")){ |
| if(buf1[0]=='#'){ |
| if(!rm&&!strcmp(buf1,ca)){remove_asm();return rm=1;} |
| strcpy(ca,buf1); |
| }else { |
| // Work out when we are accessing variables on the stack |
| if (!strcmp(buf1,"(sp),y")) { |
| if(!strcmp(buf1,ca)){ |
| remove_asm(); |
| return rm=1; |
| } |
| snprintf(ca,1024,"(sp),y",cy); |
| } |
| // Similarly look for register loads |
| // We can sometimes remove some of those, too. |
| if ((strlen(buf1)>1)&&(buf1[0]=='r')) { |
| if (strcmp(ca,buf1)) |
| snprintf(ca,1024,"%s",buf1); |
| else { |
| // Don't re-load A with the same contents it already has |
| remove_asm(); |
| return rm=1; |
| } |
| } |
| } |
| }else if(!strcmp(op1,"ldx")){ |
| if(buf1[0]=='#'){ |
| if(!rm&&!strcmp(buf1,cx)){remove_asm();return rm=1;} |
| strcpy(cx,buf1); |
| }else cx[0]=0; |
| }else if(!strcmp(op1,"ldy")){ |
| if(buf1[0]=='#'){ |
| if(!rm&&!strcmp(buf1,cy)){remove_asm();return rm=1;} |
| strcpy(cy,buf1); |
| }else cy[0]=0; |
| }else if(!strcmp(op1,"ldz")){ |
| if(buf1[0]=='#'){ |
| if(!rm&&!strcmp(buf1,cz)){remove_asm();return rm=1;} |
| strcpy(cz,buf1); |
| }else cz[0]=0; |
| }else{ |
| // TODO: PGS: Add the AXYZ operations to the clobber lists. |
| // Will we need to handle them specially? |
| static char clobbernone[]="clc cld cli clv cmp cpx cpy dec inc nop pha php plp sec sed sei sta stx sty stz"; |
| static char clobbera[]="adc and asl eor lsr ora pla rol ror sbc txa tya tza neg"; |
| static char clobberx[]="dex inx tax tsx"; |
| static char clobbery[]="dey iny tay"; |
| static char clobberz[]="dez inz taz"; |
| if(strstr(clobbernone,op1)){ |
| // Invalidate A holding a stack variable byte if SP changes |
| if (strstr(buf1,"sp")) { |
| printf("buf1='%s'\n",buf1); |
| if (strstr(ca,"(sp),y")) ca[0]=0; |
| } |
| }else if(strstr(clobbera,op1)) |
| ca[0]=0; |
| else if(strstr(clobberx,op1)) |
| cx[0]=0; |
| else if(strstr(clobbery,op1)) { |
| cy[0]=0; |
| // Invalidate A holding a stack variable byte if Y changes |
| if (strstr(ca,"(sp),y")) ca[0]=0; |
| } |
| else if(strstr(clobberz,op1)) |
| cz[0]=0; |
| else |
| ca[0]=cx[0]=cy[0]=cz[0]=0; |
| } |
| }else{ |
| ca[0]=cx[0]=cy[0]=cz[0]=0; |
| } |
| |
| rm=0; |
| |
| if(sscanf(asmline[0]," %6s %999s",op1,buf1)==2&&!strcmp(op1,"and")&&!strcmp(buf1,"#0")){ |
| strcpy(asmline[0],"\tlda\t#0\n"); |
| return rm=1; |
| } |
| |
| if(entries>=2){ |
| i--; |
| if(i<0) i=EMIT_BUF_DEPTH-1; |
| asmline[1]=emit_buffer[i]; |
| |
| |
| if(!strcmp(asmline[0],"; volatile barrier\n")&&!strcmp(asmline[0],asmline[1])){ |
| remove_asm(); |
| return rm=1; |
| } |
| |
| if(sscanf(asmline[0]," %6s",op1)==1&&!strcmp(op1,"rts")&& |
| sscanf(asmline[1]," %6s %999s",op2,buf2)==2&&!strcmp(op2,"jsr")){ |
| sprintf(asmline[1],"\tjmp\t%s\n",buf2); |
| remove_asm(); |
| return rm=1; |
| } |
| |
| for(j=0;j<sizeof(elim)/sizeof(elim[0]);j++){ |
| if(elim[j].flags&NEEDSAME){ |
| if(sscanf(asmline[0]," %6s %999s",op2,buf2)==2&& |
| sscanf(asmline[1]," %6s %999s",op1,buf1)==2&& |
| !strcmp(op1,elim[j].s1)&&!strcmp(op2,elim[j].s2)&& |
| !strcmp(buf1,buf2)){ |
| if(elim[j].r){ |
| strcpy(asmline[0],elim[j].r); |
| }else{ |
| if(elim[j].flags&REMOVE1ST) |
| strcpy(asmline[1],asmline[0]); |
| remove_asm(); |
| } |
| return rm=1; |
| } |
| }else{ |
| if(sscanf(asmline[1]," %6s",op1)==1&& |
| sscanf(asmline[0]," %6s",op2)==1&& |
| !strcmp(op1,elim[j].s1)&&!strcmp(op2,elim[j].s2)){ |
| if(elim[j].flags&REMOVE1ST) |
| strcpy(asmline[1],asmline[0]); |
| remove_asm(); |
| return rm=1; |
| } |
| } |
| } |
| |
| |
| } |
| |
| if(entries>=3){ |
| i--; |
| if(i<0) i=EMIT_BUF_DEPTH-1; |
| asmline[2]=emit_buffer[i]; |
| if(sscanf(asmline[0]," %6s %999s",op1,buf1)==2){ |
| #if 0 |
| if(!strcmp(op1,"lda")&&buf1[0]=='#'){ |
| if(sscanf(asmline[1]," %6s %999s",op2,buf2)==2&& |
| !strcmp(op2,"sta")){ |
| if(sscanf(asmline[2]," %6s %999s",op2,buf2)==2&& |
| !strcmp(op2,"lda")&&!strcmp(buf1,buf2)){ |
| remove_asm(); |
| return rm=1; |
| } |
| } |
| } |
| #endif |
| if(!strcmp(op1,"beq")||!strcmp(op1,"bne")){ |
| if(sscanf(asmline[1]," %6s %999s",op2,buf2)==2&& |
| !strcmp(op2,"cmp")&&!strcmp(buf2,"#0")){ |
| if(sscanf(asmline[2]," %6s",op2)==1&& |
| setszflag(op2)){ |
| strcpy(asmline[1],asmline[0]); |
| remove_asm(); |
| return rm=1; |
| } |
| } |
| } |
| if(!strcmp(op1,"beq")||!strcmp(op1,"bne")){ |
| if(sscanf(asmline[1]," %6s %999s",op2,buf2)==2&& |
| !strcmp(op2,"cpx")&&!strcmp(buf2,"#0")){ |
| if(sscanf(asmline[2]," %6s",op2)==1&& |
| setszxflag(op2)){ |
| strcpy(asmline[1],asmline[0]); |
| remove_asm(); |
| return rm=1; |
| } |
| } |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* Return name of library function, if this node should be |
| implemented via libcall. */ |
| char *use_libcall(int c,int t,int t2) |
| { |
| static char fname[16]; |
| char *ret=0; |
| |
| if(c==COMPARE){ |
| if((t&NQ)==LLONG||(ISFLOAT(t)&&!ieee)){ |
| sprintf(fname,"__cmp%s%s%ld",(t&UNSIGNED)?"u":"s",ISFLOAT(t)?"flt":"int",zm2l(sizetab[t&NQ])*8); |
| ret=fname; |
| } |
| }else{ |
| t&=NU; |
| t2&=NU; |
| if(ISSHORT(t)&&c!=MULT&&c!=DIV&&c!=MOD&&!ISFLOAT(t2)) |
| return 0; |
| if(ISLONG(t)&&c!=MULT&&c!=DIV&&c!=MOD&&!ISFLOAT(t2)) |
| return 0; |
| |
| if(!ieee&&ISFLOAT(t)) t=FLOAT; |
| if(t==LDOUBLE) t=DOUBLE; |
| if(t2==LDOUBLE) t2=DOUBLE; |
| if(!ieee&&ISFLOAT(t2)) t2=FLOAT; |
| if(c==CONVERT){ |
| if(t==t2) return 0; |
| if(t==FLOAT&&t2==DOUBLE) return "__flt64toflt32"; |
| if(t==DOUBLE&&t2==FLOAT) return "__flt32toflt64"; |
| |
| if(ISFLOAT(t)){ |
| sprintf(fname,"__%cint%ldtoflt%d",(t2&UNSIGNED)?'u':'s',zm2l(sizetab[t2&NQ])*8,(t==FLOAT)?32:64); |
| ret=fname; |
| } |
| if(ISFLOAT(t2)){ |
| sprintf(fname,"__flt%dto%cint%ld",((t2&NU)==FLOAT)?32:64,(t&UNSIGNED)?'u':'s',zm2l(sizetab[t&NQ])*8); |
| ret=fname; |
| } |
| } |
| if((t&NQ)==INT||(t&NQ)==LONG||(t&NQ)==LLONG||(!ieee&&ISFLOAT(t))){ |
| if((c>=LSHIFT&&c<=MOD)||(c>=OR&&c<=AND)||c==KOMPLEMENT||c==MINUS){ |
| if(t==(UNSIGNED|LLONG)&&(c==MULT||c==DIV||c==MOD||c==RSHIFT)){ |
| sprintf(fname,"__%suint64",ename[c]); |
| ret=fname; |
| }else if((t&NQ)==LLONG){ |
| sprintf(fname,"__%sint64",ename[c]); |
| ret=fname; |
| }else if(t==(UNSIGNED|LONG)&&(c==DIV||c==MOD||c==RSHIFT)){ |
| sprintf(fname,"__%suint32",ename[c]); |
| ret=fname; |
| }else if((t&NQ)==LONG){ |
| sprintf(fname,"__%sint32",ename[c]); |
| ret=fname; |
| }else if(t==(UNSIGNED|INT)&&(c==DIV||c==MOD||c==RSHIFT)){ |
| sprintf(fname,"__%suint16",ename[c]); |
| ret=fname; |
| }else if((t&NQ)==INT){ |
| sprintf(fname,"__%sint16",ename[c]); |
| ret=fname; |
| }else{ |
| sprintf(fname,"__%s%s%s%ld",ename[c],(t&UNSIGNED)?"u":"",ISFLOAT(t)?"flt":"int",zm2l(sizetab[t&NQ])*8); |
| ret=fname; |
| } |
| } |
| } |
| } |
| |
| return ret; |
| } |
| |
| |
| int pointer_varadr(Var *v) |
| { |
| int b=bank(v); |
| if(b>=0&&b!=bankcnum&&!NOBANKVARS){ |
| if(cur_funcv&&bank(cur_funcv)!=b) |
| return FPOINTER; |
| } |
| return pointer_type(v->vtyp); |
| } |
| |
| int pointer_type(struct Typ *p) |
| { |
| struct Typ *merk=p; |
| if(!p) ierror(0); |
| if(LARGE) return FPOINTER; |
| while(ISARRAY(p->flags)||ISFUNC(p->flags)) p=p->next; |
| if(p->attr){ |
| char *s; |
| if(strstr(p->attr,STR_HUGE)) return HPOINTER; |
| if(strstr(p->attr,STR_FAR)) return FPOINTER; |
| if(strstr(p->attr,STR_NEAR)) return POINTER; |
| } |
| return POINTER; |
| } |
| |
| unsigned char cbmconv(unsigned char x) |
| { |
| static unsigned char ctab[256]={ |
| 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x14,0x09,0x0D,0x11,0x93,0x0A,0x0E,0x0F, |
| 0x10,0x0B,0x12,0x13,0x08,0x15,0x16,0x17,0x18,0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F, |
| 0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F, |
| 0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C,0x3D,0x3E,0x3F, |
| 0x40,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, |
| 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0x5B,0xBF,0x5D,0x5E,0xA4, |
| 0xAD,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,0x4D,0x4E,0x4F, |
| 0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5A,0xB3,0xDD,0xAB,0xB1,0xDF, |
| 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, |
| 0x90,0x91,0x92,0x0C,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, |
| 0xA0,0xA1,0xA2,0xA3,0x5F,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0x7D,0xAC,0x60,0xAE,0xAF, |
| 0xB0,0x7E,0xB2,0x7B,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0x5C, |
| 0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F, |
| 0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A,0x7B,0xDC,0x7C,0xDE,0x7F, |
| 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, |
| 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF |
| }; |
| |
| static unsigned char atab[]={0xfd,8,0x7f,0x9b,11,0x7d}; |
| |
| if(cbmascii) |
| return ctab[x&255]; |
| else if(atascii&&x>=7&&x<=12) |
| return atab[x-7]; |
| else |
| return x; |
| } |
| |
| void insert_const(union atyps *p,int t) |
| /* Traegt Konstante in entprechendes Feld ein. */ |
| { |
| if(!p) ierror(0); |
| /* *p = (union atyps) 0 ; /* rfi: clear unused bits */ |
| t&=NU; |
| if(t==CHAR) {p->vchar=vchar;return;} |
| if(t==SHORT) {p->vshort=vshort;return;} |
| if(t==INT) {p->vint=vint;return;} |
| if(t==LONG) {p->vlong=vlong;return;} |
| if(t==LLONG) {p->vllong=vllong;return;} |
| if(t==MAXINT) {p->vmax=vmax;return;} |
| if(t==(UNSIGNED|CHAR)) {p->vuchar=vuchar;return;} |
| if(t==(UNSIGNED|SHORT)) {p->vushort=vushort;return;} |
| if(t==(UNSIGNED|INT)) {p->vuint=vuint;return;} |
| if(t==(UNSIGNED|LONG)) {p->vulong=vulong;return;} |
| if(t==(UNSIGNED|LLONG)) {p->vullong=vullong;return;} |
| if(t==(UNSIGNED|MAXINT)) {p->vumax=vumax;return;} |
| if(t==FLOAT) {p->vfloat=vfloat;return;} |
| if(t==DOUBLE) {p->vdouble=vdouble;return;} |
| if(t==LDOUBLE) {p->vldouble=vldouble;return;} |
| if(t==POINTER) {p->vuint=vuint;return;} |
| if(t==FPOINTER||t==HPOINTER) {p->vulong=vulong;return;} |
| } |
| |
| void eval_const(union atyps *p,int t) |
| /* Weist bestimmten globalen Variablen Wert einer CEXPR zu. */ |
| { |
| int f=t&NQ; |
| if(!p) ierror(0); |
| if(f==MAXINT||(f>=CHAR&&f<=LLONG)){ |
| if(!(t&UNSIGNED)){ |
| if(f==CHAR) vmax=zc2zm(p->vchar); |
| else if(f==SHORT)vmax=zs2zm(p->vshort); |
| else if(f==INT) vmax=zi2zm(p->vint); |
| else if(f==LONG) vmax=zl2zm(p->vlong); |
| else if(f==LLONG) vmax=zll2zm(p->vllong); |
| else if(f==MAXINT) vmax=p->vmax; |
| else ierror(0); |
| vumax=zm2zum(vmax); |
| vldouble=zm2zld(vmax); |
| }else{ |
| if(f==CHAR) vumax=zuc2zum(p->vuchar); |
| else if(f==SHORT)vumax=zus2zum(p->vushort); |
| else if(f==INT) vumax=zui2zum(p->vuint); |
| else if(f==LONG) vumax=zul2zum(p->vulong); |
| else if(f==LLONG) vumax=zull2zum(p->vullong); |
| else if(f==MAXINT) vumax=p->vumax; |
| else ierror(0); |
| vmax=zum2zm(vumax); |
| vldouble=zum2zld(vumax); |
| } |
| }else{ |
| if(ISPOINTER(f)){ |
| if(f==POINTER) |
| vumax=zui2zum(p->vuint); |
| else |
| vumax=zul2zum(p->vulong); |
| vmax=zum2zm(vumax);vldouble=zum2zld(vumax); |
| }else{ |
| if(f==FLOAT) vldouble=zf2zld(p->vfloat); |
| else if(f==DOUBLE) vldouble=zd2zld(p->vdouble); |
| else vldouble=p->vldouble; |
| vmax=zld2zm(vldouble); |
| vumax=zld2zum(vldouble); |
| } |
| } |
| vfloat=zld2zf(vldouble); |
| vdouble=zld2zd(vldouble); |
| vuchar=zum2zuc(vumax); |
| vushort=zum2zus(vumax); |
| vuint=zum2zui(vumax); |
| vulong=zum2zul(vumax); |
| vullong=zum2zull(vumax); |
| vchar=zm2zc(vmax); |
| vshort=zm2zs(vmax); |
| vint=zm2zi(vmax); |
| vlong=zm2zl(vmax); |
| vllong=zm2zll(vmax); |
| } |
| |
| void printval(FILE *f,union atyps *p,int t) |
| /* Gibt atyps aus. */ |
| { |
| t&=NU; |
| if(t==CHAR){fprintf(f,"C");vmax=zc2zm(p->vchar);printzm(f,vmax);} |
| if(t==(UNSIGNED|CHAR)){fprintf(f,"UC");vumax=zuc2zum(p->vuchar);printzum(f,vumax);} |
| if(t==SHORT){fprintf(f,"S");vmax=zs2zm(p->vshort);printzm(f,vmax);} |
| if(t==(UNSIGNED|SHORT)){fprintf(f,"US");vumax=zus2zum(p->vushort);printzum(f,vumax);} |
| if(t==FLOAT){fprintf(f,"F");vldouble=zf2zld(p->vfloat);printzld(f,vldouble);} |
| if(t==DOUBLE){fprintf(f,"D");vldouble=zd2zld(p->vdouble);printzld(f,vldouble);} |
| if(t==LDOUBLE){fprintf(f,"LD");printzld(f,p->vldouble);} |
| if(t==INT){fprintf(f,"I");vmax=zi2zm(p->vint);printzm(f,vmax);} |
| if(t==(UNSIGNED|INT)||t==POINTER){fprintf(f,"UI");vumax=zui2zum(p->vuint);printzum(f,vumax);} |
| if(t==LONG){fprintf(f,"L");vmax=zl2zm(p->vlong);printzm(f,vmax);} |
| if(t==(UNSIGNED|LONG)||t==FPOINTER||t==HPOINTER){fprintf(f,"UL");vumax=zul2zum(p->vulong);printzum(f,vumax);} |
| if(t==LLONG){fprintf(f,"LL");vmax=zll2zm(p->vllong);printzm(f,vmax);} |
| if(t==(UNSIGNED|LLONG)){fprintf(f,"ULL");vumax=zull2zum(p->vullong);printzum(f,vumax);} |
| if(t==MAXINT) printzm(f,p->vmax); |
| if(t==(UNSIGNED|MAXINT)) printzum(f,p->vumax); |
| } |
| |
| void emitval(FILE *f,union atyps *p,int t) |
| /* Gibt atyps aus. */ |
| { |
| t&=NU; |
| if(t==CHAR){vmax=zc2zm(p->vchar);emitzm(f,vmax);} |
| if(t==(UNSIGNED|CHAR)){vumax=zuc2zum(p->vuchar);emitzum(f,vumax);} |
| if(t==SHORT){vmax=zs2zm(p->vshort);emitzm(f,vmax);} |
| if(t==(UNSIGNED|SHORT)){vumax=zus2zum(p->vushort);emitzum(f,vumax);} |
| if(t==FLOAT){vldouble=zf2zld(p->vfloat);emitzld(f,vldouble);} |
| if(t==DOUBLE){vldouble=zd2zld(p->vdouble);emitzld(f,vldouble);} |
| if(t==LDOUBLE){emitzld(f,p->vldouble);} |
| if(t==INT){vmax=zi2zm(p->vint);emitzm(f,vmax);} |
| if(t==(UNSIGNED|INT)||t==POINTER){vumax=zui2zum(p->vuint);emitzum(f,vumax);} |
| if(t==LONG){vmax=zl2zm(p->vlong);emitzm(f,vmax);} |
| if(t==(UNSIGNED|LONG)||t==FPOINTER||t==HPOINTER){vumax=zul2zum(p->vulong);emitzum(f,vumax);} |
| if(t==LLONG){vmax=zll2zm(p->vllong);emitzm(f,vmax);} |
| if(t==(UNSIGNED|LLONG)){vumax=zull2zum(p->vullong);emitzum(f,vumax);} |
| if(t==MAXINT) emitzm(f,p->vmax); |
| if(t==(UNSIGNED|MAXINT)) emitzum(f,p->vumax); |
| } |
| |
| void conv_typ(struct Typ *p) |
| /* Erzeugt extended types in einem Typ. */ |
| { |
| char *attr; |
| while(p){ |
| if(ISPOINTER(p->flags)){ |
| p->flags=((p->flags&~NU)|POINTER_TYPE(p->next)); |
| if(attr=p->next->attr){ |
| if(strstr(attr,STR_NEAR)) |
| p->flags=((p->flags&~NU)|POINTER); |
| if(strstr(attr,STR_FAR)) |
| p->flags=((p->flags&~NU)|FPOINTER); |
| if(strstr(attr,STR_HUGE)) |
| p->flags=((p->flags&~NU)|HPOINTER); |
| } |
| } |
| p=p->next; |
| } |
| } |
| |
| void add_var_hook_post(Var *v) |
| { |
| if(use_sec&&(v->storage_class==STATIC||v->storage_class==EXTERN)){ |
| char buf[SECLEN+32]; |
| sprintf(buf,"section(\"%s\");",use_sec); |
| add_attr(&v->vattr,buf); |
| } |
| if(use_bank>=0&&(v->storage_class==STATIC||v->storage_class==EXTERN)){ |
| char buf[64]; |
| /*sprintf(buf,"section(\"bank%d\");bank(%d)",use_bank,use_bank);*/ |
| sprintf(buf,"bank(%d)",use_bank); |
| add_attr(&v->vattr,buf); |
| } |
| } |
| |
| int decide_reverse(zmax v) |
| { |
| if(zmeqto(v,Z1)||zmeqto(v,l2zm(2L))) |
| return 1; |
| if(optspeed) |
| if(zmeqto(v,l2zm(4L))||zmeqto(v,l2zm(8L))||zmeqto(v,l2zm(256L))||zmeqto(v,l2zm(512L))) |
| return 1; |
| |
| return 0; |
| } |
| |
| static int is_single_eff_ic(struct IC *p) |
| { |
| struct Var *v,*idx; |
| if(p->code!=ADDI2P||(p->typf2&NQ)!=POINTER) |
| return 0; |
| if(!(p->q2.flags&KONST)){ |
| if((p->typf&NU)!=(UNSIGNED|CHAR)) |
| return 0; |
| if((p->q2.flags&(VAR|DREFOBJ))!=VAR) |
| return 0; |
| if(p->q2.v->storage_class!=AUTO&&p->q2.v->storage_class!=REGISTER) |
| return 0; |
| idx=p->q2.v; |
| }else{ |
| idx=0; |
| eval_const(&p->q2.val,p->typf); |
| /* TODO: more precise check considering data type useful? */ |
| if(!zmleq(vumax,l2zm(255L))) |
| return 0; |
| return 1; |
| } |
| if(p->q1.flags&DREFOBJ) |
| return 0; |
| if((p->z.flags&(VAR|DREFOBJ))!=VAR) |
| return 0; |
| if(p->z.v->storage_class==STATIC||p->z.v->storage_class==EXTERN) |
| return 0; |
| v=p->z.v; |
| for(p=p->next;p;p=p->next){ |
| int c=p->code; |
| if(c==LABEL||(c>=BEQ&&c<=BRA)) |
| return 1; /* TODO: how elaborate should we test? */ |
| if((p->q1.flags&VAR)&&p->q1.v==v){ |
| if(p->q1.flags&DREFOBJ) |
| return 1; |
| else |
| return 0; |
| } |
| if((p->q2.flags&VAR)&&p->q2.v==v){ |
| if(p->q2.flags&DREFOBJ) |
| return 1; |
| else |
| return 0; |
| } |
| if((p->z.flags&VAR)&&p->z.v==v){ |
| if(p->z.flags&DREFOBJ) |
| return 1; |
| else |
| return 0; |
| } |
| if((p->z.flags&VAR)&&p->z.v==idx) |
| return 0; |
| } |
| return 0; |
| } |
| |
| void mark_eff_ics(void) |
| { |
| struct IC *p; |
| for(p=first_ic;p;p=p->next){ |
| if(is_single_eff_ic(p)) |
| p->flags|=EFF_IC; |
| else |
| p->flags&=~EFF_IC; |
| } |
| } |