scc

Simple C99 Compiler
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commit c305b6f188a2d59e8ba7e87b6ee6761922d09447
parent 9d132dc59173787dd773ce0e82b55bc4e1c1dffc
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Mon, 16 Mar 2015 09:56:34 +0000

Add LDI instruction

This instruction is used for immediate loads.

Diffstat:
cc2/cc2.h | 12+++++++++++-
cc2/cgen.c | 11++++++++++-
cc2/code.c | 2++
3 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/cc2/cc2.h b/cc2/cc2.h @@ -112,7 +112,17 @@ enum nerrors { enum { - LDW, LDL, LDH, MOV, ADD, PUSH, POP, RET, NOP, INC + LDW, + LDL, + LDH, + MOV, + LDI, + ADD, + PUSH, + POP, + RET, + NOP, + INC }; enum { diff --git a/cc2/cgen.c b/cc2/cgen.c @@ -122,8 +122,17 @@ moveto(Node *np, uint8_t reg) 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: diff --git a/cc2/code.c b/cc2/code.c @@ -24,6 +24,7 @@ static void (*instcode[])(void) = { [LDW] = inst2, [LDL] = inst2, [LDH] = inst2, + [LDI] = inst2, [MOV] = inst2, [ADD] = inst2, [PUSH] = inst1, @@ -37,6 +38,7 @@ static char *insttext[] = { [LDW] = "LD", [LDL] = "LD", [LDH] = "LD", + [LDI] = "LD", [MOV] = "LD", [ADD] = "ADD", [PUSH] = "PUSH",