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aco: use s_delay_alu skip field

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fossil-db (gfx1100):
Totals from 130066 (96.65% of 134574) affected shaders:
Instrs: 80208817 -> 71420648 (-10.96%)
CodeSize: 403523036 -> 368370360 (-8.71%)
Latency: 658064779 -> 657935384 (-0.02%); split: -0.02%, +0.00%
InvThroughput: 87698268 -> 87693326 (-0.01%); split: -0.01%, +0.00%

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Georg Lehmann <dadschoorse@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20512>
This commit is contained in:
Rhys Perry
2023-01-03 16:35:17 +00:00
committed by Marge Bot
parent e2f083c0a7
commit b64afc1d37
1 changed files with 27 additions and 0 deletions
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27
src/amd/compiler/aco_insert_waitcnt.cpp
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@@ -1097,6 +1097,33 @@ insert_wait_states(Program* program)
out_ctx[current.index] = std::move(ctx);
}
/* Combine s_delay_alu using the skip field. */
if (program->gfx_level >= GFX11) {
for (Block& block : program->blocks) {
int i = 0;
int prev_delay_alu = -1;
for (aco_ptr<Instruction>& instr : block.instructions) {
if (instr->opcode != aco_opcode::s_delay_alu) {
block.instructions[i++] = std::move(instr);
continue;
}
uint16_t imm = instr->sopp().imm;
int skip = i - prev_delay_alu - 1;
if (imm >> 7 || prev_delay_alu < 0 || skip >= 6) {
if (imm >> 7 == 0)
prev_delay_alu = i;
block.instructions[i++] = std::move(instr);
continue;
}
block.instructions[prev_delay_alu]->sopp().imm |= (skip << 4) | (imm << 7);
prev_delay_alu = -1;
}
block.instructions.resize(i);
}
}
}
} // namespace aco