shithub: scc

Info  •  Files  •  Log  •  Branches

Add LDI instruction

This instruction is used for immediate loads.

--- a/cc2/cc2.h

+++ b/cc2/cc2.h

@@ -112,7 +112,17 @@

 enum {

-	LDW, LDL, LDH, MOV, ADD, PUSH, POP, RET, NOP, INC

+	LDW,

+	LDL,

+	LDH,

+	MOV,

+	LDI,

+	ADD,

+	PUSH,

+	POP,

+	RET,

+	NOP,

+	INC

 };

 enum {

--- a/cc2/cgen.c

+++ b/cc2/cgen.c

@@ -122,8 +122,17 @@

 	Symbol *sym;

 	switch (np->op) {

-	case AUTO:

 	case CONST:

+		switch (np->type.size) {

+		case 1:

+		case 2:

+			code(LDI, regs[reg], np);

+			break;

+		default:

+			abort();

+		}

+		break;

+	case AUTO:

 		sym = np->u.sym;

 		switch (np->type.size) {

 		case 1:

--- a/cc2/code.c

+++ b/cc2/code.c

@@ -24,6 +24,7 @@

 	[LDW] = inst2,

 	[LDL] = inst2,

 	[LDH] = inst2,

+	[LDI] = inst2,

 	[MOV] = inst2,

 	[ADD] = inst2,

 	[PUSH] = inst1,

@@ -37,6 +38,7 @@

 	[LDW] = "LD",

 	[LDL] = "LD",

 	[LDH] = "LD",

+	[LDI] = "LD",

 	[MOV] = "LD",

 	[ADD] = "ADD",

 	[PUSH] = "PUSH",