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pan/bi: Simplify TEXC codegen for sr_count=0

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Obscure case.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11123>
This commit is contained in:
Alyssa Rosenzweig 2021-05-05 15:48:35 -04:00 • committed by Marge Bot
parent de8fe8c0b1
commit 246beb15cf
1 changed files with 9 additions and 7 deletions
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16
src/panfrost/bifrost/bifrost_compile.c
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@ -2501,7 +2501,6 @@ bi_emit_texc(bi_builder *b, nir_tex_instr *instr)
/* Allocate staging registers contiguously by compacting the array.
* Index is not SSA (tied operands) */
bi_index idx = bi_temp_reg(b->shader);
unsigned sr_count = 0;
for (unsigned i = 0; i < ARRAY_SIZE(dregs); ++i) {
@ -2509,19 +2508,22 @@ bi_emit_texc(bi_builder *b, nir_tex_instr *instr)
dregs[sr_count++] = dregs[i];
}
bi_index idx = sr_count ? bi_temp_reg(b->shader) : bi_null();
if (sr_count)
bi_make_vec_to(b, idx, dregs, NULL, sr_count, 32);
else
bi_mov_i32_to(b, idx, bi_zero()); /* XXX: shouldn't be necessary */
uint32_t desc_u = 0;
memcpy(&desc_u, &desc, sizeof(desc_u));
bi_texc_to(b, idx, idx, cx, cy, bi_imm_u32(desc_u), sr_count);
bi_texc_to(b, sr_count ? idx : bi_dest_index(&instr->dest),
idx, cx, cy, bi_imm_u32(desc_u), sr_count);
/* Explicit copy to facilitate tied operands */
bi_index srcs[4] = { idx, idx, idx, idx };
unsigned channels[4] = { 0, 1, 2, 3 };
bi_make_vec_to(b, bi_dest_index(&instr->dest), srcs, channels, 4, 32);
if (sr_count) {
bi_index srcs[4] = { idx, idx, idx, idx };
unsigned channels[4] = { 0, 1, 2, 3 };
bi_make_vec_to(b, bi_dest_index(&instr->dest), srcs, channels, 4, 32);
}
}
/* Simple textures ops correspond to NIR tex or txl with LOD = 0 on 2D/cube