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Make alignments for struct arguments 8 bytes

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The ABI (http://www.x86-64.org/documentation/abi.pdf) says
"The size of each argument gets rounded up to eightbytes"
This commit is contained in:
Shinichiro Hamaji 2010-12-28 19:09:59 +09:00
parent 83f0a7b6f8
commit 07fd82b411
1 changed files with 4 additions and 4 deletions
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8
x86_64-gen.c
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@ -821,7 +821,7 @@ void gfunc_call(int nb_args)
for(i = 0; i < nb_args; i++) { for(i = 0; i < nb_args; i++) {
if ((vtop[-i].type.t & VT_BTYPE) == VT_STRUCT) { if ((vtop[-i].type.t & VT_BTYPE) == VT_STRUCT) {
args_size += type_size(&vtop[-i].type, &align); args_size += type_size(&vtop[-i].type, &align);
args_size = (args_size + 3) & ~3; args_size = (args_size + 7) & ~7;
} else if ((vtop[-i].type.t & VT_BTYPE) == VT_LDOUBLE) { } else if ((vtop[-i].type.t & VT_BTYPE) == VT_LDOUBLE) {
args_size += 16; args_size += 16;
} else if (is_sse_float(vtop[-i].type.t)) { } else if (is_sse_float(vtop[-i].type.t)) {
@ -855,7 +855,7 @@ void gfunc_call(int nb_args)
if ((vtop->type.t & VT_BTYPE) == VT_STRUCT) { if ((vtop->type.t & VT_BTYPE) == VT_STRUCT) {
size = type_size(&vtop->type, &align); size = type_size(&vtop->type, &align);
/* align to stack align size */ /* align to stack align size */
size = (size + 3) & ~3; size = (size + 7) & ~7;
/* allocate the necessary size on stack */ /* allocate the necessary size on stack */
o(0x48); o(0x48);
oad(0xec81, size); /* sub $xxx, %rsp */ oad(0xec81, size); /* sub $xxx, %rsp */
@ -999,7 +999,7 @@ void gfunc_prolog(CType *func_type)
} }
} else if ((type->t & VT_BTYPE) == VT_STRUCT) { } else if ((type->t & VT_BTYPE) == VT_STRUCT) {
size = type_size(type, &align); size = type_size(type, &align);
size = (size + 3) & ~3; size = (size + 7) & ~7;
seen_stack_size += size; seen_stack_size += size;
} else if ((type->t & VT_BTYPE) == VT_LDOUBLE) { } else if ((type->t & VT_BTYPE) == VT_LDOUBLE) {
seen_stack_size += LDOUBLE_SIZE; seen_stack_size += LDOUBLE_SIZE;
@ -1058,7 +1058,7 @@ void gfunc_prolog(CType *func_type)
while ((sym = sym->next) != NULL) { while ((sym = sym->next) != NULL) {
type = &sym->type; type = &sym->type;
size = type_size(type, &align); size = type_size(type, &align);
size = (size + 3) & ~3; size = (size + 7) & ~7;
if (is_sse_float(type->t)) { if (is_sse_float(type->t)) {
if (sse_param_index < 8) { if (sse_param_index < 8) {
/* save arguments passed by register */ /* save arguments passed by register */