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aco: Optimize thread_id_in_threadgroup when there is just one wave.

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Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6964>
This commit is contained in:
Timur Kristóf
2020-09-29 18:06:44 +02:00
parent 5e31fb49a3
commit 57d8799284
1 changed files with 4 additions and 1 deletions
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src/amd/compiler/aco_instruction_selection.cpp
+4 -1
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@@ -3883,9 +3883,12 @@ Temp thread_id_in_threadgroup(isel_context *ctx)
/* tid_in_tg = wave_id * wave_size + tid_in_wave */
Builder bld(ctx->program, ctx->block);
Temp tid_in_wave = emit_mbcnt(ctx, bld.tmp(v1));
if (ctx->program->workgroup_size <= ctx->program->wave_size)
return tid_in_wave;
Temp wave_id_in_tg = wave_id_in_threadgroup(ctx);
Temp tid_in_wave = emit_mbcnt(ctx, bld.tmp(v1));
Temp num_pre_threads = bld.sop2(aco_opcode::s_lshl_b32, bld.def(s1), bld.def(s1, scc), wave_id_in_tg,
Operand(ctx->program->wave_size == 64 ? 6u : 5u));
return bld.vadd32(bld.def(v1), Operand(num_pre_threads), Operand(tid_in_wave));