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radeonsi: if shader culling culls all vertices, cull the primitive exports too 

This was overlooked. It benefits triangle strips the most due to
GS fast launch.

Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11509>
This commit is contained in:
Marek Olšák 2021-06-16 19:31:22 -04:00
parent defc7c92d9
commit 593f3b3a5a
1 changed files with 7 additions and 1 deletions
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8
src/gallium/drivers/radeonsi/gfx10_shader_ngg.c
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@ -1113,9 +1113,15 @@ void gfx10_emit_ngg_culling_epilogue(struct ac_shader_abi *abi, unsigned max_out
}
ac_build_endif(&ctx->ac, 16009);
/* If all vertices are culled, set the primitive count to 0, so that all waves are culled here. */
LLVMValueRef num_primitives = ngg_get_prim_cnt(ctx);
num_primitives = LLVMBuildSelect(builder,
LLVMBuildICmp(builder, LLVMIntEQ, new_num_es_threads,
ctx->ac.i32_0, ""),
ctx->ac.i32_0, num_primitives, "");
/* Kill waves that have inactive threads. */
kill_wave = LLVMBuildICmp(builder, LLVMIntULE,
ac_build_imax(&ctx->ac, new_num_es_threads, ngg_get_prim_cnt(ctx)),
ac_build_imax(&ctx->ac, new_num_es_threads, num_primitives),
LLVMBuildMul(builder, get_wave_id_in_tg(ctx),
LLVMConstInt(ctx->ac.i32, ctx->ac.wave_size, 0), ""),
"");