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glsl: Implement fswzadd

Browse source 
and wip nv thread shuffle impl
This commit is contained in:
ameerj 2021-06-08 01:55:12 -04:00
parent c542204113
commit 8bb8bbf4ae
5 changed files with 45 additions and 5 deletions
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11
src/shader_recompiler/backend/glsl/emit_context.cpp
View file

@ -306,6 +306,7 @@ EmitContext::EmitContext(IR::Program& program, Bindings& bindings, const Profile
SetupImages(bindings);
SetupTextures(bindings);
DefineHelperFunctions();
DefineConstants();
}
void EmitContext::SetupExtensions(std::string&) {
@ -339,6 +340,9 @@ void EmitContext::SetupExtensions(std::string&) {
if (!info.uses_int64) {
header += "#extension GL_ARB_gpu_shader_int64 : enable\n";
}
if (profile.support_gl_warp_intrinsics) {
header += "#extension GL_NV_shader_thread_shuffle : enable\n";
}
}
if (info.stores_viewport_index && profile.support_viewport_index_layer_non_geometry &&
stage != Stage::Geometry) {
@ -605,4 +609,11 @@ void EmitContext::SetupTextures(Bindings& bindings) {
}
}
void EmitContext::DefineConstants() {
if (info.uses_fswzadd) {
header += "const float FSWZ_A[]=float[4](-1.f,1.f,-1.f,0.f);"
"const float FSWZ_B[]=float[4](-1.f,-1.f,1.f,-1.f);";
}
}
} // namespace Shader::Backend::GLSL

1
src/shader_recompiler/backend/glsl/emit_context.h
View file

@ -167,6 +167,7 @@ private:
void DefineStorageBuffers(Bindings& bindings);
void DefineGenericOutput(size_t index, u32 invocations);
void DefineHelperFunctions();
void DefineConstants();
std::string DefineGlobalMemoryFunctions();
void SetupImages(Bindings& bindings);
void SetupTextures(Bindings& bindings);

36
src/shader_recompiler/backend/glsl/emit_glsl_warp.cpp
View file

@ -35,9 +35,17 @@ std::string GetMaxThreadId(std::string_view thread_id, std::string_view clamp,
const auto min_thread_id{ComputeMinThreadId(thread_id, segmentation_mask)};
return ComputeMaxThreadId(min_thread_id, clamp, not_seg_mask);
}
void UseShuffleNv(EmitContext& ctx, IR::Inst& inst, std::string_view shfl_op,
std::string_view value, std::string_view index,
[[maybe_unused]] std::string_view clamp, std::string_view segmentation_mask) {
const auto width{fmt::format("32u>>(bitCount({}&31u))", segmentation_mask)};
ctx.AddU32("{}={}({},{},{},shfl_in_bounds);", inst, shfl_op, value, index, width);
SetInBoundsFlag(ctx, inst);
}
} // namespace
void EmitLaneId([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] IR::Inst& inst) {
void EmitLaneId(EmitContext& ctx, IR::Inst& inst) {
ctx.AddU32("{}=gl_SubGroupInvocationARB&31u;", inst);
}
@ -103,6 +111,10 @@ void EmitSubgroupGeMask(EmitContext& ctx, IR::Inst& inst) {
void EmitShuffleIndex(EmitContext& ctx, IR::Inst& inst, std::string_view value,
std::string_view index, std::string_view clamp,
std::string_view segmentation_mask) {
if (ctx.profile.support_gl_warp_intrinsics) {
UseShuffleNv(ctx, inst, "shuffleNV", value, index, clamp, segmentation_mask);
return;
}
const auto not_seg_mask{fmt::format("(~{})", segmentation_mask)};
const auto thread_id{"gl_SubGroupInvocationARB"};
const auto min_thread_id{ComputeMinThreadId(thread_id, segmentation_mask)};
@ -117,6 +129,10 @@ void EmitShuffleIndex(EmitContext& ctx, IR::Inst& inst, std::string_view value,
void EmitShuffleUp(EmitContext& ctx, IR::Inst& inst, std::string_view value, std::string_view index,
std::string_view clamp, std::string_view segmentation_mask) {
if (ctx.profile.support_gl_warp_intrinsics) {
UseShuffleNv(ctx, inst, "shuffleUpNV", value, index, clamp, segmentation_mask);
return;
}
const auto thread_id{"gl_SubGroupInvocationARB"};
const auto max_thread_id{GetMaxThreadId(thread_id, clamp, segmentation_mask)};
const auto src_thread_id{fmt::format("({}-{})", thread_id, index)};
@ -128,6 +144,10 @@ void EmitShuffleUp(EmitContext& ctx, IR::Inst& inst, std::string_view value, std
void EmitShuffleDown(EmitContext& ctx, IR::Inst& inst, std::string_view value,
std::string_view index, std::string_view clamp,
std::string_view segmentation_mask) {
if (ctx.profile.support_gl_warp_intrinsics) {
UseShuffleNv(ctx, inst, "shuffleDownNV", value, index, clamp, segmentation_mask);
return;
}
const auto thread_id{"gl_SubGroupInvocationARB"};
const auto max_thread_id{GetMaxThreadId(thread_id, clamp, segmentation_mask)};
const auto src_thread_id{fmt::format("({}+{})", thread_id, index)};
@ -139,6 +159,10 @@ void EmitShuffleDown(EmitContext& ctx, IR::Inst& inst, std::string_view value,
void EmitShuffleButterfly(EmitContext& ctx, IR::Inst& inst, std::string_view value,
std::string_view index, std::string_view clamp,
std::string_view segmentation_mask) {
if (ctx.profile.support_gl_warp_intrinsics) {
UseShuffleNv(ctx, inst, "shuffleXorNV", value, index, clamp, segmentation_mask);
return;
}
const auto thread_id{"gl_SubGroupInvocationARB"};
const auto max_thread_id{GetMaxThreadId(thread_id, clamp, segmentation_mask)};
const auto src_thread_id{fmt::format("({}^{})", thread_id, index)};
@ -147,10 +171,12 @@ void EmitShuffleButterfly(EmitContext& ctx, IR::Inst& inst, std::string_view val
ctx.AddU32("{}=shfl_in_bounds?readInvocationARB({},{}):{};", inst, value, src_thread_id, value);
}
void EmitFSwizzleAdd([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] IR::Inst& inst,
[[maybe_unused]] std::string_view op_a, [[maybe_unused]] std::string_view op_b,
[[maybe_unused]] std::string_view swizzle) {
NotImplemented();
void EmitFSwizzleAdd(EmitContext& ctx, IR::Inst& inst, std::string_view op_a, std::string_view op_b,
std::string_view swizzle) {
const auto mask{fmt::format("({}>>((gl_SubGroupInvocationARB&3)<<1))&3", swizzle)};
const std::string modifier_a = fmt::format("FSWZ_A[{}]", mask);
const std::string modifier_b = fmt::format("FSWZ_B[{}]", mask);
ctx.AddF32("{}=({}*{})+({}*{});", inst, op_a, modifier_a, op_b, modifier_b);
}
void EmitDPdxFine(EmitContext& ctx, IR::Inst& inst, std::string_view op_a) {

1
src/shader_recompiler/profile.h
View file

@ -86,6 +86,7 @@ struct Profile {
bool support_gl_nv_gpu_shader_5{};
bool support_gl_amd_gpu_shader_half_float{};
bool support_gl_texture_shadow_lod{};
bool support_gl_warp_intrinsics{};
bool warp_size_potentially_larger_than_guest{};

1
src/video_core/renderer_opengl/gl_shader_cache.cpp
View file

@ -226,6 +226,7 @@ ShaderCache::ShaderCache(RasterizerOpenGL& rasterizer_, Core::Frontend::EmuWindo
.support_gl_nv_gpu_shader_5 = device.HasNvGpuShader5(),
.support_gl_amd_gpu_shader_half_float = device.HasAmdShaderHalfFloat(),
.support_gl_texture_shadow_lod = device.HasTextureShadowLod(),
.support_gl_warp_intrinsics = false,
.warp_size_potentially_larger_than_guest = device.IsWarpSizePotentiallyLargerThanGuest(),