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jay/lower_post_ra: drop old 2<-->8 lowering

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this XOR based lowering is no longer needed.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/41064>
This commit is contained in:
Alyssa Rosenzweig 2026-04-20 11:06:01 -04:00 • committed by Marge Bot
parent 915af8e121
commit e5bf153d4f
1 changed files with 5 additions and 33 deletions
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38
src/intel/compiler/jay/jay_lower_post_ra.c
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@ -35,13 +35,6 @@ lower_non_tied_default(jay_builder *b, jay_inst *I, jay_def default_)
}
}
static inline jay_def
hi(jay_def x)
{
x.hi = true;
return x;
}
static bool
lower(jay_builder *b, jay_inst *I)
{
@ -60,33 +53,9 @@ lower(jay_builder *b, jay_inst *I)
return true;
if (I->dst.file == GPR && I->src[0].file == GPR) {
jay_def dst = I->dst, src = I->src[0], tmp4 = jay_bare_reg(GPR, 0);
jay_def dst = I->dst, src = I->src[0];
enum jay_stride dst_stride = jay_def_stride(b->shader, dst);
enum jay_stride src_stride = jay_def_stride(b->shader, src);
assert(jay_def_stride(b->shader, tmp4) == JAY_STRIDE_4 && "ABI");
if (dst_stride == JAY_STRIDE_8 && src_stride == JAY_STRIDE_2) {
jay_MOV(b, dst, tmp4);
jay_MOV(b, tmp4, src)->type = JAY_TYPE_U16;
jay_MOV(b, hi(tmp4), hi(src))->type = JAY_TYPE_U16;
jay_XOR(b, JAY_TYPE_U32, dst, dst, tmp4);
jay_XOR(b, JAY_TYPE_U32, tmp4, dst, tmp4);
jay_XOR(b, JAY_TYPE_U32, dst, dst, tmp4);
return true;
} else if (dst_stride == JAY_STRIDE_2 && src_stride == JAY_STRIDE_8) {
jay_MOV(b, dst, tmp4)->type = JAY_TYPE_U16;
jay_MOV(b, hi(dst), hi(tmp4))->type = JAY_TYPE_U16;
jay_MOV(b, tmp4, src);
for (unsigned i = 0; i < 3; ++i) {
jay_XOR(b, JAY_TYPE_U16, i == 1 ? tmp4 : dst, dst, tmp4);
jay_XOR(b, JAY_TYPE_U16, i == 1 ? hi(tmp4) : hi(dst), hi(dst),
hi(tmp4));
}
return true;
}
/* Lower 4B<-->2B copies. To pack the register file, RA
* sometimes inserts 32-bit copies involving 16-bit strided sources like
@ -100,7 +69,10 @@ lower(jay_builder *b, jay_inst *I)
if (stride_sz < type_sz) {
assert(stride_sz == 16 && type_sz == 32 && "no other case hit");
I->type = JAY_TYPE_U16;
jay_MOV(b, hi(dst), hi(src))->type = JAY_TYPE_U16;
dst.hi = true;
src.hi = true;
jay_MOV(b, dst, src)->type = JAY_TYPE_U16;
}
}