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Begin work on lb_emit_asm_template_call

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gingerBill
2026-08-09 21:55:36 +01:00
parent 25ce7e87de
commit 036e38442b
5 changed files with 67 additions and 5 deletions
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43
src/llvm_backend_asm.cpp Normal file
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gb_internal lbValue lb_emit_asm_template_call(lbProcedure *p, Entity *entity, Array<lbValue> const &args) {
GB_ASSERT(entity->kind == Entity_AsmTemplate);
// GB_PANIC("TODO(bill): lb_emit_asm_template_call");
gbString asm_string = gb_string_make(heap_allocator(), "");
gbString constraints = gb_string_make(heap_allocator(), "");
auto *ate = &entity->AsmTemplate;
GB_ASSERT(ate->node->kind == Ast_AsmTemplate);
auto *node = &ate->node->AsmTemplate;
for_array(i, node->instructions) {
auto *instruction = node->instructions[i];
gb_unused(instruction);
}
// asm_string = gb_string_appendc(asm_string, "lock cmpxchg16b $3");
// asm_string = gb_string_appendc(asm_string, "\\0A\\09");
// asm_string = gb_string_appendc(asm_string, "setz $2");
// constraints = gb_string_appendc(constraints, "*m,={ax},={dx},=r,{ax},{dx},{bx},{cx},~{cc},~{memory}");
Type *proc_type = base_type(entity->type);
GB_ASSERT(proc_type->kind == Type_Proc);
LLVMTypeRef llvm_type = lb_type_internal_for_procedures_raw(p->module, proc_type);
gb_printf_err("%s\n", LLVMPrintTypeToString(llvm_type));
LLVMValueRef fn = LLVMGetInlineAsm(llvm_type, asm_string, gb_string_length(asm_string),
constraints, gb_string_length(constraints),
entity->AsmTemplate.has_side_effects,
entity->AsmTemplate.is_align_stack,
LLVMInlineAsmDialectATT, /*CanThrow*/false);
LLVMValueRef *llvm_args = gb_alloc_array(heap_allocator(), LLVMValueRef, args.count);
for_array(i, args) {
llvm_args[i] = args[i].value;
}
LLVMValueRef result = LLVMBuildCall2(p->builder, llvm_type, fn, llvm_args, cast(unsigned)args.count, "");
Type *result_type = reduce_tuple_to_single_type(proc_type->Proc.results);
gb_printf_err("%s\n", LLVMPrintValueToString(result));
return {result, result_type};
}