diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/codegen/nasm.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/src/codegen/nasm.c b/src/codegen/nasm.c index 7f70cb6..50db1bc 100644 --- a/src/codegen/nasm.c +++ b/src/codegen/nasm.c @@ -92,10 +92,38 @@ static bool emit_operand(struct Emitter* emitter, struct Expr* expr) return false; } +static void emit_divide(struct Emitter* emitter, struct AssignStatement* assign) +{ + struct Token target = resolve_token(emitter, assign->target); + bool target_is_rax = target.length == 3 && memcmp(target.start, "rax", 3) == 0; + if (assign->target_deref || !target_is_rax) + { + fprintf(emitter->out, "\t; TODO: unsupported division\n"); + return; + } + + fprintf(emitter->out, "\tcqo\n"); + fprintf(emitter->out, "\tidiv "); + emit_operand(emitter, assign->value); + fprintf(emitter->out, "\n"); +} + static void emit_assign(struct Emitter* emitter, struct AssignStatement* assign) { + if (assign->value->kind == EXPR_BINARY) + { + fprintf(emitter->out, "\t; TODO: unsupported assignment\n"); + return; + } + + if (assign->op.type == TOKEN_SLASH_EQUAL) + { + emit_divide(emitter, assign); + return; + } + const char* mnemonic = assign_mnemonic(assign->op.type); - if (mnemonic == NULL || assign->value->kind == EXPR_BINARY) + if (mnemonic == NULL) { fprintf(emitter->out, "\t; TODO: unsupported assignment\n"); return; |