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Support segment overrides on asm memory operands

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This commit is contained in:
gingerBill
2026-08-18 14:44:24 +01:00
parent 12c89ee2bf
commit fd9ccd7b10
4 changed files with 76 additions and 14 deletions
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17
src/llvm_backend_asm.cpp
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@@ -146,6 +146,11 @@ struct lbAsmGenerate {
case_ast_node(label, AsmLabelDecl, op);
asm_string = write_label(asm_string, &label->name->Ident);
case_end;
case_ast_node(reg, AsmRegister, op);
asm_string = gb_string_appendc(asm_string, "%");
asm_string = gb_string_append_length(asm_string, reg->name.string.text, reg->name.string.len);
case_end;
default:
GB_PANIC("TODO(bill): write_operand for '%s'", expr_to_string(op));
break;
@@ -287,6 +292,11 @@ struct lbAsmGenerate_amd64 : lbAsmGenerate {
gbString write_memory_operand(gbString asm_string, Slice<i32> const &op_number, AstAsmMemoryOperand *mem_op, u32 flags) override {
if (mem_op->segment_override != nullptr) {
asm_string = this->write_operand(asm_string, op_number, mem_op->segment_override, flags);
asm_string = gb_string_appendc(asm_string, ":");
}
if (mem_op->disp) {
u32 disp_flags = flags;
disp_flags &= ~WriteOperandFlag_PrintPrefixes;
@@ -297,8 +307,9 @@ struct lbAsmGenerate_amd64 : lbAsmGenerate {
asm_string = this->write_operand(asm_string, op_number, mem_op->disp, disp_flags);
}
asm_string = gb_string_appendc(asm_string, "(");
GB_ASSERT(mem_op->base != nullptr);
asm_string = this->write_operand(asm_string, op_number, mem_op->base, flags);
if (mem_op->base != nullptr) {
asm_string = this->write_operand(asm_string, op_number, mem_op->base, flags);
}
if (mem_op->index) {
u32 index_flags = flags;
if (mem_op->index_op.kind == Token_Sub) {
@@ -657,7 +668,7 @@ struct lbAsmGenerate_amd64 : lbAsmGenerate {
LLVMValueRef call = LLVMBuildCall2(p->builder, fn_ty, ia, call_args.data, cast(unsigned)call_args.count, "");
if (true) {
if (false) {
// DEBUG PRINT!!!
// DEBUG PRINT!!!
// DEBUG PRINT!!!