| /* |
| * Backend for the Fire16 iCE40 SoftCore |
| * (c) 2019 by Sylvain Munaut |
| */ |
| |
| #include "dt.h" |
| |
| |
| /* This struct can be used to implement machine-specific */ |
| /* addressing-modes. */ |
| struct AddressingMode { |
| int not_used_yet; // FIXME |
| }; |
| |
| /* The number of registers of the target machine. */ |
| /* - 16 rN GPR + 8 pairs |
| * - 16 sN GPR + 8 pairs |
| * - A, X, Y, I |
| */ |
| #define MAXR 52 |
| |
| /* Number of commandline-options the code-generator accepts. */ |
| #define MAXGF 20 |
| |
| /* If this is set to zero vbcc will not generate ICs where the */ |
| /* target operand is the same as the 2nd source operand. */ |
| /* This can sometimes simplify the code-generator, but usually */ |
| /* the code is better if the code-generator allows it. */ |
| #define USEQ2ASZ 1 |
| |
| /* This specifies the smallest integer type that can be added to a */ |
| /* pointer. */ |
| #define MINADDI2P CHAR |
| |
| /* This specifies the smallest integer type that can be added to a */ |
| /* pointer. */ |
| #define MAXADDI2P INT |
| |
| /* If the bytes of an integer are ordered most significant byte */ |
| /* byte first and then decreasing set BIGENDIAN to 1. */ |
| #define BIGENDIAN 0 |
| |
| /* If the bytes of an integer are ordered lest significant byte */ |
| /* byte first and then increasing set LITTLEENDIAN to 1. */ |
| #define LITTLEENDIAN 1 |
| |
| /* Note that BIGENDIAN and LITTLEENDIAN are mutually exclusive. */ |
| |
| /* If switch-statements should be generated as a sequence of */ |
| /* SUB,TST,BEQ ICs rather than COMPARE,BEQ ICs set this to 1. */ |
| /* This can yield better code on some machines. */ |
| #define SWITCHSUBS 0 |
| |
| /* In optimizing compilation certain library memcpy/strcpy-calls */ |
| /* with length known at compile-time will be inlined using an */ |
| /* ASSIGN-IC if the size is less or equal to INLINEMEMCPY. */ |
| /* The type used for the ASSIGN-IC will be UNSIGNED|CHAR. */ |
| #define INLINEMEMCPY 16 |
| |
| /* Parameters are sometimes passed in registers without __reg. */ |
| #define HAVE_REGPARMS 1 |
| |
| /* Structure for reg_parm(). */ |
| struct reg_handle{ |
| unsigned long gpr; |
| }; |
| |
| /* We have register pairs. */ |
| #define HAVE_REGPAIRS 1 |
| |
| /* We use unsigned int as size_t rather than unsigned long which */ |
| /* is the default setting. */ |
| #define HAVE_INT_SIZET 1 |
| |
| /* We have asm_peephole to optimize assembly-output */ |
| #define HAVE_TARGET_PEEPHOLE 0 /* FIXME: not yet */ |
| |
| /* We have some target-specific variable attributes. */ |
| #define HAVE_TARGET_ATTRIBUTES 1 |
| |
| /* We do not have target-specific pragmas */ |
| #undef HAVE_TARGET_PRAGMAS |
| |
| /* We keep track of all registers modified by a function. */ |
| #define HAVE_REGS_MODIFIED 1 |
| |
| /* We have a implement our own cost-functions to adapt |
| register-allocation */ |
| #if 0 /* FIXME */ |
| #define HAVE_TARGET_RALLOC 1 |
| #define cost_move_reg(x,y) XXX |
| #define cost_load_reg(x,y) XXX |
| #define cost_save_reg(x,y) XXX |
| #define cost_pushpop_reg(x) XXX |
| #endif |
| |
| /* we do not have a mark_eff_ics function, this is used to prevent |
| optimizations on code which can already be implemented by efficient |
| assembly */ |
| #undef HAVE_TARGET_EFF_IC |
| |
| /* we do not need extra elements in the IC */ |
| #undef HAVE_EXT_IC |
| |
| /* we need extended types (for pmem/dmem pointers) */ |
| #define HAVE_EXT_TYPES 1 |
| |
| #undef CHAR |
| #undef SHORT |
| #undef INT |
| #undef LONG |
| #undef LLONG |
| #undef FLOAT |
| #undef DOUBLE |
| #undef LDOUBLE |
| #undef VOID |
| #undef POINTER |
| #undef ARRAY |
| #undef STRUCT |
| #undef UNION |
| #undef ENUM |
| #undef FUNKT |
| #undef BOOL |
| #undef MAXINT |
| #undef MAX_TYPE |
| |
| #define CHAR 1 |
| #define SHORT 2 |
| #define INT 3 |
| #define LONG 4 |
| #define LLONG 5 |
| #define FLOAT 6 |
| #define DOUBLE 7 |
| #define LDOUBLE 8 |
| #define VOID 9 |
| #define DPOINTER 10 |
| #define PPOINTER 11 |
| #define ARRAY 12 |
| #define STRUCT 13 |
| #define UNION 14 |
| #define ENUM 15 |
| #define FUNKT 16 |
| #define BOOL 17 |
| #define MAXINT 18 |
| #define MAX_TYPE MAXINT |
| |
| #define POINTER_TYPE(x) pointer_type(x) |
| extern int pointer_type(); |
| #define ISPOINTER(x) ((x&NQ)>=DPOINTER&&(x&NQ)<=PPOINTER) |
| #define ISSCALAR(x) ((x&NQ)>=CHAR&&(x&NQ)<=PPOINTER) |
| #define ISINT(x) ((x&NQ)>=CHAR&&(x&NQ)<=LLONG) |
| #define PTRDIFF_T(x) (INT) |
| |
| typedef zllong zmax; |
| typedef zullong zumax; |
| |
| union atyps{ |
| zchar vchar; |
| zuchar vuchar; |
| zshort vshort; |
| zushort vushort; |
| zint vint; |
| zuint vuint; |
| zlong vlong; |
| zulong vulong; |
| zllong vllong; |
| zullong vullong; |
| zmax vmax; |
| zumax vumax; |
| zfloat vfloat; |
| zdouble vdouble; |
| zldouble vldouble; |
| }; |
| |
| |
| /* we need our own printval */ |
| #define HAVE_TGT_PRINTVAL 1 |
| |
| /* we want to replace some ICs with libcalls */ |
| #define HAVE_LIBCALLS 1 |
| |
| /* we much prefer BNE */ |
| #define HAVE_WANTBNE 1 |
| |
| /* size of buffer for asm-output */ |
| #define EMIT_BUF_LEN 1024 /* should be enough */ |
| |
| /* number of asm-output lines buffered */ |
| #define EMIT_BUF_DEPTH 4 |