scc

commit 8ab588d0ba2eaa191b6b93fdb4053db29fdcf8fa
parent c4db51782e98cba3cd7b4203447db47dca8fa398
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Mon, 16 Feb 2015 15:29:42 +0100

Add Inst data type in cc2

This type is the base for the instruction in the memory.
The idea is to have a list of these instructions, so we can
optimize them before of any operation.

Diffstat:
M
cc2/code.c
 | 
35
+++++++++++++++++++++++++++++++++++

1 file changed, 35 insertions(+), 0 deletions(-)
diff --git a/cc2/code.c b/cc2/code.c
@@ -8,6 +8,23 @@
 #include "../inc/cc.h"
 #include "cc2.h"
 
+typedef struct inst Inst;
+typedef struct addr Addr;
+
+struct addr {
+	char kind;
+	union {
+		char reg;
+		Inst *pc;
+		Symbol *sym;
+	} u;
+};
+
+struct inst {
+	char op;
+	Addr from, to;
+	Inst *next;
+};
 
 static char *opnames[] = {
 	[PUSH] = "PUSH", [POP] = "POP", [LD]  = "LD", [ADD] = "ADD",
@@ -36,6 +53,24 @@ static char *opfmt[] = {
 	[LDX]  = "\to\t(r+i),r",
 };
 
+Inst *prog, *pc;
+
+Inst *
+inst(uint8_t op)
+{
+	Inst *new;
+
+	new = xmalloc(sizeof(*new));
+	if (!pc)
+		prog = new;
+	else
+		pc->next = new;
+	pc = new;
+	pc->op = op;
+	pc->next = NULL;
+	return pc;
+}
+
 void
 code(char op, ...)
 {