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agx: optimize txf with lod 0

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Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29179>
This commit is contained in:
Alyssa Rosenzweig 2024-04-28 22:08:40 -04:00 • committed by Marge Bot
parent 5c898e56b2
commit aad82f4265
1 changed files with 10 additions and 4 deletions
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14
src/asahi/compiler/agx_compile.c
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@ -1960,7 +1960,7 @@ agx_emit_alu(agx_builder *b, nir_alu_instr *instr)
}
static enum agx_lod_mode
agx_lod_mode_for_nir(nir_texop op, bool biased)
agx_lod_mode_for_nir(nir_texop op, bool biased, bool lod_is_zero)
{
switch (op) {
case nir_texop_tex:
@ -1975,9 +1975,10 @@ agx_lod_mode_for_nir(nir_texop op, bool biased)
case nir_texop_txl:
return AGX_LOD_MODE_LOD_MIN;
case nir_texop_txf:
return AGX_LOD_MODE_LOD_MIN;
return lod_is_zero ? AGX_LOD_MODE_AUTO_LOD : AGX_LOD_MODE_LOD_MIN;
case nir_texop_txf_ms:
return AGX_LOD_MODE_AUTO_LOD; /* no mipmapping */
assert(lod_is_zero && "no mipmapping");
return AGX_LOD_MODE_AUTO_LOD;
default:
unreachable("Unhandled texture op");
}
@ -2009,6 +2010,8 @@ agx_emit_tex(agx_builder *b, nir_tex_instr *instr)
sampler = agx_immediate(0), lod = agx_immediate(0),
compare = agx_null(), packed_offset = agx_null();
bool lod_is_zero = true;
for (unsigned i = 0; i < instr->num_srcs; ++i) {
agx_index index = agx_src_index(&instr->src[i].src);
@ -2024,6 +2027,8 @@ agx_emit_tex(agx_builder *b, nir_tex_instr *instr)
case nir_tex_src_lod:
case nir_tex_src_bias:
lod = index;
lod_is_zero = nir_src_is_const(instr->src[i].src) &&
nir_src_as_uint(instr->src[i].src) == 0;
break;
case nir_tex_src_comparator:
@ -2074,7 +2079,8 @@ agx_emit_tex(agx_builder *b, nir_tex_instr *instr)
}
enum agx_lod_mode lod_mode = agx_lod_mode_for_nir(
instr->op, nir_tex_instr_src_index(instr, nir_tex_src_bias) >= 0);
instr->op, nir_tex_instr_src_index(instr, nir_tex_src_bias) >= 0,
lod_is_zero);
if (lod_mode == AGX_LOD_MODE_AUTO_LOD) {
/* Ignored logically but asserted 0 */