Import VBCC source snapshot (29/04/2022)
diff --git a/machines/z/machine.h b/machines/z/machine.h
new file mode 100755
index 0000000..6f43fc8
--- /dev/null
+++ b/machines/z/machine.h
@@ -0,0 +1,81 @@
+/* Z-machine code generator
+ * David Given
+ */
+
+#include "dt.h"
+
+/* Machine specific addressing-modes. Not used. */
+
+struct AddressingMode{
+ int never_used;
+};
+
+/* The number of registers we support. We don't really have any, but we
+ * use local variables instead; we have 14.
+ */
+
+#define MAXR 14
+
+/* Number of command-line options we accept. */
+
+#define MAXGF 6
+
+/* 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
+
+/* The smallest and largest integer type that can be added to a pointer. */
+
+#define MINADDI2P INT
+#define MAXADDI2P INT
+
+/* Big-endian? */
+
+#define BIGENDIAN 1
+
+/* Little-endian? */
+
+#define LITTLEENDIAN 0
+
+/* 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. On the Z-machine, memcpy can be done in `hardware' with the
+ * @copy_table opcode, so always inline them if possible.
+ */
+
+#define INLINEMEMCPY 65536
+
+/* Do we want to pass parameters to functions in registers? */
+
+#define HAVE_REGPARMS 1
+
+/* If so, how many? Max 7 due to the architecture, but one is always xp. */
+
+#define NUM_REGPARMS 6
+
+/* This structure is used to keep track of where register parameters go. */
+
+struct reg_handle {
+ int reg;
+};
+
+/* Do we want to use zuint for size_t rather than the default zulong? */
+
+#define HAVE_INT_SIZET 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