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radeonsi: enable scratch coalescing

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This makes one particular compute shader 8x faster.

Latest LLVM git is required.

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
This commit is contained in:
Marek Olšák 2016-06-08 13:21:25 +02:00
parent 0c0f841e5d
commit 6e1b12c788
1 changed files with 10 additions and 2 deletions
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12
src/gallium/drivers/radeonsi/si_shader.c
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@ -5903,8 +5903,16 @@ void si_shader_apply_scratch_relocs(struct si_context *sctx,
unsigned i;
uint32_t scratch_rsrc_dword0 = scratch_va;
uint32_t scratch_rsrc_dword1 =
S_008F04_BASE_ADDRESS_HI(scratch_va >> 32)
| S_008F04_STRIDE(config->scratch_bytes_per_wave / 64);
S_008F04_BASE_ADDRESS_HI(scratch_va >> 32);
/* Enable scratch coalescing if LLVM sets ELEMENT_SIZE & INDEX_STRIDE
* correctly.
*/
if (HAVE_LLVM >= 0x0309)
scratch_rsrc_dword1 |= S_008F04_SWIZZLE_ENABLE(1);
else
scratch_rsrc_dword1 |=
S_008F04_STRIDE(config->scratch_bytes_per_wave / 64);
for (i = 0 ; i < shader->binary.reloc_count; i++) {
const struct radeon_shader_reloc *reloc =