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Diagnose in an asm template instead of aborting with SIGILL

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kalsprite
2026-08-23 22:36:57 -07:00
parent 965970af71
commit b6c64c28b5
4 changed files with 32 additions and 1 deletions
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7
src/check_asm.cpp
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@@ -825,6 +825,11 @@ gb_internal bool check_register(AsmCtx *asm_ctx, Operand *operand, AstAsmRegiste
u16 width_in_bits = asm_ctx->reg_size(r);
switch (width_in_bits) {
case 0:
// a register whose class the width table cannot describe, `%rip` being the only one.
// anchored on the name rather than the operand, which clobbers and pins do not have
error(asm_reg->name, "Asm registers with no operand width are not supported: %%%.*s", LIT(name));
return false;
case 8:
operand->type = t_u8;
break;
@@ -838,7 +843,7 @@ gb_internal bool check_register(AsmCtx *asm_ctx, Operand *operand, AstAsmRegiste
operand->type = t_u64;
break;
case 80:
error(operand->expr, "80-bit width asm registers are not supported");
error(asm_reg->name, "80-bit width asm registers are not supported");
return false;
case 128:
operand->type = alloc_type_simd_vector(4, t_f32);