aco: allow reading/writing upper halves/bytes when possible

Use SDWA, opsel or a different opcode to achieve this.

shader-db (Navi, fp16 enabled):
Totals from 42 (0.03% of 127638) affected shaders:
VGPRs: 3424 -> 3416 (-0.23%)
CodeSize: 811124 -> 811984 (+0.11%); split: -0.12%, +0.23%
Instrs: 156638 -> 155733 (-0.58%)
Cycles: 1994180 -> 1982568 (-0.58%); split: -0.59%, +0.00%
VMEM: 7019 -> 7187 (+2.39%); split: +3.45%, -1.05%
SMEM: 1771 -> 1770 (-0.06%); split: +0.06%, -0.11%
VClause: 1477 -> 1475 (-0.14%)
Copies: 13216 -> 12406 (-6.13%)
Branches: 5942 -> 5901 (-0.69%)

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5040>

This commit is contained in:

Rhys Perry

2020-05-11 17:49:40 +01:00

committed by

Marge Bot

parent 98060ba0f0

commit 56345b8c61

6 changed files with 424 additions and 69 deletions

									
										src/amd/compiler/aco_instruction_selection_setup.cpp
									
		+1
		
												View File
												
				@@ -1255,6 +1255,7 @@ setup_isel_context(Program* program,

				   ctx.block->kind = block_kind_top_level;

				   setup_xnack(program);

				   program->sram_ecc_enabled = args->options->family == CHIP_ARCTURUS;

				   return ctx;

				}