Mesa (main): ac/llvm: add a callback to ac_cull_triangle to generate code in inner-most block
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Sun Jun 20 05:43:00 UTC 2021
Module: Mesa
Branch: main
Commit: 12d2df15f178591d45193b6cc3e093281e2ea0aa
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=12d2df15f178591d45193b6cc3e093281e2ea0aa
Author: Marek Olšák <marek.olsak at amd.com>
Date: Tue Jun 1 01:09:57 2021 -0400
ac/llvm: add a callback to ac_cull_triangle to generate code in inner-most block
This will reduce jumps in culling code.
Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer at amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11486>
---
src/amd/llvm/ac_llvm_cull.c | 13 ++++++++++---
src/amd/llvm/ac_llvm_cull.h | 7 ++++++-
src/gallium/drivers/radeonsi/gfx10_shader_ngg.c | 2 +-
src/gallium/drivers/radeonsi/si_compute_prim_discard.c | 3 ++-
4 files changed, 19 insertions(+), 6 deletions(-)
diff --git a/src/amd/llvm/ac_llvm_cull.c b/src/amd/llvm/ac_llvm_cull.c
index 3c185d69650..028e125b386 100644
--- a/src/amd/llvm/ac_llvm_cull.c
+++ b/src/amd/llvm/ac_llvm_cull.c
@@ -120,7 +120,8 @@ static LLVMValueRef cull_bbox(struct ac_llvm_context *ctx, LLVMValueRef pos[3][4
LLVMValueRef vp_scale[2], LLVMValueRef vp_translate[2],
LLVMValueRef small_prim_precision, bool cull_view_xy,
bool cull_view_near_z, bool cull_view_far_z, bool cull_small_prims,
- bool use_halfz_clip_space)
+ bool use_halfz_clip_space, ac_cull_accept_func accept_func,
+ void *userdata)
{
LLVMBuilderRef builder = ctx->builder;
@@ -200,6 +201,9 @@ static LLVMValueRef cull_bbox(struct ac_llvm_context *ctx, LLVMValueRef pos[3][4
accepted = LLVMBuildAnd(builder, accepted, visible, "");
}
+ if (accept_func)
+ accept_func(ctx, accepted, userdata);
+
LLVMBuildStore(builder, accepted, accepted_var);
}
ac_build_endif(ctx, 10000000);
@@ -222,11 +226,13 @@ static LLVMValueRef cull_bbox(struct ac_llvm_context *ctx, LLVMValueRef pos[3][4
* the rasterizer. Set to num_samples / 2^subpixel_bits.
* subpixel_bits are defined by the quantization mode.
* \param options See ac_cull_options.
+ * \param accept_func Callback invoked in the inner-most branch where the primitive is accepted.
*/
LLVMValueRef ac_cull_triangle(struct ac_llvm_context *ctx, LLVMValueRef pos[3][4],
LLVMValueRef initially_accepted, LLVMValueRef vp_scale[2],
LLVMValueRef vp_translate[2], LLVMValueRef small_prim_precision,
- struct ac_cull_options *options)
+ struct ac_cull_options *options, ac_cull_accept_func accept_func,
+ void *userdata)
{
struct ac_position_w_info w;
ac_analyze_position_w(ctx, pos, &w);
@@ -244,6 +250,7 @@ LLVMValueRef ac_cull_triangle(struct ac_llvm_context *ctx, LLVMValueRef pos[3][4
/* View culling and small primitive elimination. */
accepted = cull_bbox(ctx, pos, accepted, &w, vp_scale, vp_translate, small_prim_precision,
options->cull_view_xy, options->cull_view_near_z, options->cull_view_far_z,
- options->cull_small_prims, options->use_halfz_clip_space);
+ options->cull_small_prims, options->use_halfz_clip_space, accept_func,
+ userdata);
return accepted;
}
diff --git a/src/amd/llvm/ac_llvm_cull.h b/src/amd/llvm/ac_llvm_cull.h
index 2c4b7f7da05..5e35111733f 100644
--- a/src/amd/llvm/ac_llvm_cull.h
+++ b/src/amd/llvm/ac_llvm_cull.h
@@ -48,9 +48,14 @@ struct ac_cull_options {
bool use_halfz_clip_space;
};
+/* Callback invoked in the inner-most branch where the primitive is accepted. */
+typedef void (*ac_cull_accept_func)(struct ac_llvm_context *ctx, LLVMValueRef accepted,
+ void *userdata);
+
LLVMValueRef ac_cull_triangle(struct ac_llvm_context *ctx, LLVMValueRef pos[3][4],
LLVMValueRef initially_accepted, LLVMValueRef vp_scale[2],
LLVMValueRef vp_translate[2], LLVMValueRef small_prim_precision,
- struct ac_cull_options *options);
+ struct ac_cull_options *options, ac_cull_accept_func accept_func,
+ void *userdata);
#endif
diff --git a/src/gallium/drivers/radeonsi/gfx10_shader_ngg.c b/src/gallium/drivers/radeonsi/gfx10_shader_ngg.c
index d72c72e748a..0bcd8b4b3d9 100644
--- a/src/gallium/drivers/radeonsi/gfx10_shader_ngg.c
+++ b/src/gallium/drivers/radeonsi/gfx10_shader_ngg.c
@@ -985,7 +985,7 @@ void gfx10_emit_ngg_culling_epilogue(struct ac_shader_abi *abi, unsigned max_out
/* Tell ES threads whether their vertex survived. */
ac_build_ifcc(&ctx->ac,
ac_cull_triangle(&ctx->ac, pos, ctx->ac.i1true, vp_scale, vp_translate,
- small_prim_precision, &options),
+ small_prim_precision, &options, NULL, NULL),
16003);
{
LLVMBuildStore(builder, ctx->ac.i32_1, gs_accepted);
diff --git a/src/gallium/drivers/radeonsi/si_compute_prim_discard.c b/src/gallium/drivers/radeonsi/si_compute_prim_discard.c
index c830a857f66..a75086606f4 100644
--- a/src/gallium/drivers/radeonsi/si_compute_prim_discard.c
+++ b/src/gallium/drivers/radeonsi/si_compute_prim_discard.c
@@ -673,7 +673,8 @@ void si_build_prim_discard_compute_shader(struct si_shader_context *ctx)
LLVMValueRef accepted =
ac_cull_triangle(&ctx->ac, pos, prim_restart_accepted, vp_scale, vp_translate,
- ac_get_arg(&ctx->ac, param_smallprim_precision), &options);
+ ac_get_arg(&ctx->ac, param_smallprim_precision), &options,
+ NULL, NULL);
ac_build_optimization_barrier(&ctx->ac, &accepted, false);
LLVMValueRef accepted_threadmask = ac_get_i1_sgpr_mask(&ctx->ac, accepted);
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