fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2025-12-25 08:40:11 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

radeonsi: Prevent geometry shader from emitting too many vertices

Browse source
This commit is contained in:
Michel Daenzer 2014-02-13 15:37:11 +09:00 • committed by Michel Dänzer
parent b3094d9927
commit 59936a49dd
1 changed files with 16 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
src/gallium/drivers/radeonsi/si_shader.c
View file

@ -1905,6 +1905,7 @@ static void si_llvm_emit_vertex(
LLVMValueRef soffset = LLVMGetParam(si_shader_ctx->radeon_bld.main_fn,
SI_PARAM_GS2VS_OFFSET);
LLVMValueRef gs_next_vertex;
LLVMValueRef can_emit, kill;
LLVMValueRef t_list_ptr;
LLVMValueRef t_list;
LLVMValueRef args[2];
@ -1934,6 +1935,21 @@ static void si_llvm_emit_vertex(
/* Write vertex attribute values to GSVS ring */
gs_next_vertex = LLVMBuildLoad(gallivm->builder, si_shader_ctx->gs_next_vertex, "");
/* If this thread has already emitted the declared maximum number of
* vertices, kill it: excessive vertex emissions are not supposed to
* have any effect, and GS threads have no externally observable
* effects other than emitting vertices.
*/
can_emit = LLVMBuildICmp(gallivm->builder, LLVMIntULE, gs_next_vertex,
lp_build_const_int32(gallivm,
shader->gs_max_out_vertices), "");
kill = lp_build_select(&bld_base->base, can_emit,
lp_build_const_float(gallivm, 1.0f),
lp_build_const_float(gallivm, -1.0f));
build_intrinsic(gallivm->builder, "llvm.AMDGPU.kill",
LLVMVoidTypeInContext(gallivm->context), &kill, 1, 0);
for (i = 0; i < shader->noutput; i++) {
LLVMValueRef *out_ptr =
si_shader_ctx->radeon_bld.soa.outputs[shader->output[i].index];