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pan/bi: Use position shader ST_CVT path 

We need to use a preload instead of the LEA_ATTR. Not sure why.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14154>
This commit is contained in:
Alyssa Rosenzweig 2021-12-10 13:35:41 -05:00 committed by Marge Bot
parent fe8ec31114
commit a211d2b4e4
1 changed files with 11 additions and 1 deletions
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12
src/panfrost/bifrost/bifrost_compile.c
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@ -726,7 +726,17 @@ bi_emit_store_vary(bi_builder *b, nir_intrinsic_instr *instr)
bi_index data = bi_src_index(&instr->src[0]);
if (immediate) {
if (b->shader->arch <= 8 && b->shader->idvs == BI_IDVS_POSITION) {
/* Bifrost position shaders have a fast path */
assert(T == nir_type_float16 || T == nir_type_float32);
unsigned regfmt = (T == nir_type_float16) ? 0 : 1;
unsigned identity = (b->shader->arch == 6) ? 0x688 : 0;
unsigned snap4 = 0x5E;
uint32_t format = identity | (snap4 << 12) | (regfmt << 24);
bi_st_cvt(b, data, bi_register(58), bi_register(59),
bi_imm_u32(format), regfmt, nr - 1);
} else if (immediate) {
bi_index address = bi_lea_attr_imm(b,
bi_register(61), bi_register(62),
regfmt, imm_index);