qf/quakeforge
0
0
Fork 0
mirror of https://git.code.sf.net/p/quake/quakeforge synced 2025-02-25 13:11:00 +00:00
Code Issues Projects Releases Packages Wiki Activity

[qfcc] Use a temp for size-changing swizzles

Browse source 
The Ruamoko instruction set has only same-size swizzles, so a staging
temp is needed either before (grow) or after (srink) the swizzle.
Unfortunately, it looks like there might be missed optimization issues,
but at least things seem to be correct.
This commit is contained in:
Bill Currie 2024-09-05 14:26:29 +09:00
parent 24a48ad703
commit 1f3b21a626
1 changed files with 20 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

21
tools/qfcc/source/statements.c
View file

@ -1919,6 +1919,7 @@ expr_swizzle (sblock_t *sblock, const expr_t *e, operand_t **op)
const char *opcode = "swizzle";
statement_t *s;
int swiz = 0;
auto src_type = get_type (e->swizzle.src);
auto res_type = e->swizzle.type;
for (int i = 0; i < 4; i++) {
@ -1934,7 +1935,25 @@ expr_swizzle (sblock_t *sblock, const expr_t *e, operand_t **op)
*op = temp_operand (res_type, e);
}
s->opc = *op;
sblock_add_statement (sblock, s);
if (type_width (res_type) < type_width (src_type)) {
auto tmp = temp_operand (src_type, e);
s->opc = tmp;
sblock_add_statement (sblock, s);
tmp = offset_alias_operand (res_type, 0, tmp, e);
auto stmp = assign_statement (*op, tmp, e);
sblock_add_statement (sblock, stmp);
} else if (type_width (res_type) > type_width (src_type)) {
auto tmp = temp_operand (res_type, e);
auto atmp = offset_alias_operand (src_type, 0, tmp, e);
auto stmp = assign_statement (atmp, s->opa, e);
sblock_add_statement (sblock, stmp);
s->opa = tmp;
sblock_add_statement (sblock, s);
} else {
sblock_add_statement (sblock, s);
}
return sblock;
}