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Support [base + index<<scale] and [base + index>>scale]; Support syntax for [base]:u8 (not implemented yet)

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gingerBill
2026-08-12 09:03:31 +01:00
parent 21ad041232
commit c80fedc070
5 changed files with 103 additions and 27 deletions
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48
src/check_asm.cpp
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@@ -991,14 +991,40 @@ gb_internal void check_asm_instruction_operand(AsmCtx *asm_ctx, CheckerContext *
break;
} else {
i64 v = exact_value_to_i64(scale.value);
switch (v) {
case 1: case 2: case 4: case 8:
// okay
Token op = mem_op->scale_op;
switch (op.kind) {
case Token_Mul:
switch (v) {
case 1: case 2: case 4: case 8:
// okay
break;
default:
error(scale.expr, "A scale using '*' must be a constant integer or an immediate with the value 1, 2, 4, or 8, got %s", s);
break;
}
break;
case Token_Shl:
case Token_Shr:
switch (v) {
case 0: case 1: case 2: case 3:
// okay
break;
default:
error(scale.expr, "A shifting scale using '%.*s' must be a constant integer or an immediate with the value 0, 1, 2, or 3, got %s", LIT(op.string), s);
break;
}
break;
default:
error(scale.expr, "A scale must be a constant integer or an immediate with the value 1, 2, 4, or 8, got %s", s);
error(op, "Unknown/unhandled scaling operator '%.*s'", LIT(op.string));
break;
}
if (op.kind == Token_Shr) {
if (build_context.metrics.arch != TargetArch_arm64) {
error(op, "The target platform does not support '%.*s' for shifting scale parameters in memory operands", LIT(op.string));
}
}
}
} else {
Entity *param_entity = entity_of_node(scale.expr);
@@ -1065,6 +1091,20 @@ gb_internal void check_asm_instruction_operand(AsmCtx *asm_ctx, CheckerContext *
}
}
if (mem_op->type) {
Type *type_interpretation = check_type(ctx, mem_op->type);
if (type_interpretation != nullptr && type_interpretation != t_invalid) {
operand->type = alloc_type_pointer(type_interpretation);
if (!is_valid_asm_parameter_type(type_interpretation) ||
is_type_pointer(type_interpretation)) { // do not allow pointers even if they are valid asm parameter types
gbString s = type_to_string(type_interpretation);
error(mem_op->type, "Asm memory operands type interpretation must be either an integer, boolean, float, or #simd vector, got %s", s);
gb_string_free(s);
}
}
}
return;
case_end;
case_ast_node(label, AsmLabelDecl, expr);