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emit_spirv: Workaround VK_KHR_shader_float_controls on fp16 Nvidia 

Fix regression on Fire Emblem: Three Houses when using native fp16.
master
ReinUsesLisp 2021-06-29 18:42:17 +07:00 committed by ameerj
parent 1b27a2b597
commit 8722668b3c
4 changed files with 12 additions and 5 deletions
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13
src/shader_recompiler/backend/spirv/emit_spirv.cpp
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@ -319,7 +319,7 @@ void SetupDenormControl(const Profile& profile, const IR::Program& program, Emit
Id main_func) {
const Info& info{program.info};
if (info.uses_fp32_denorms_flush && info.uses_fp32_denorms_preserve) {
LOG_WARNING(Shader_SPIRV, "Fp32 denorm flush and preserve on the same shader");
LOG_DEBUG(Shader_SPIRV, "Fp32 denorm flush and preserve on the same shader");
} else if (info.uses_fp32_denorms_flush) {
if (profile.support_fp32_denorm_flush) {
ctx.AddCapability(spv::Capability::DenormFlushToZero);
@ -332,15 +332,15 @@ void SetupDenormControl(const Profile& profile, const IR::Program& program, Emit
ctx.AddCapability(spv::Capability::DenormPreserve);
ctx.AddExecutionMode(main_func, spv::ExecutionMode::DenormPreserve, 32U);
} else {
LOG_WARNING(Shader_SPIRV, "Fp32 denorm preserve used in shader without host support");
LOG_DEBUG(Shader_SPIRV, "Fp32 denorm preserve used in shader without host support");
}
}
if (!profile.support_separate_denorm_behavior) {
if (!profile.support_separate_denorm_behavior || profile.has_broken_fp16_float_controls) {
// No separate denorm behavior
return;
}
if (info.uses_fp16_denorms_flush && info.uses_fp16_denorms_preserve) {
LOG_WARNING(Shader_SPIRV, "Fp16 denorm flush and preserve on the same shader");
LOG_DEBUG(Shader_SPIRV, "Fp16 denorm flush and preserve on the same shader");
} else if (info.uses_fp16_denorms_flush) {
if (profile.support_fp16_denorm_flush) {
ctx.AddCapability(spv::Capability::DenormFlushToZero);
@ -353,13 +353,16 @@ void SetupDenormControl(const Profile& profile, const IR::Program& program, Emit
ctx.AddCapability(spv::Capability::DenormPreserve);
ctx.AddExecutionMode(main_func, spv::ExecutionMode::DenormPreserve, 16U);
} else {
LOG_WARNING(Shader_SPIRV, "Fp16 denorm preserve used in shader without host support");
LOG_DEBUG(Shader_SPIRV, "Fp16 denorm preserve used in shader without host support");
}
}
}
void SetupSignedNanCapabilities(const Profile& profile, const IR::Program& program,
EmitContext& ctx, Id main_func) {
if (profile.has_broken_fp16_float_controls && program.info.uses_fp16) {
return;
}
if (program.info.uses_fp16 && profile.support_fp16_signed_zero_nan_preserve) {
ctx.AddCapability(spv::Capability::SignedZeroInfNanPreserve);
ctx.AddExecutionMode(main_func, spv::ExecutionMode::SignedZeroInfNanPreserve, 16U);

2
src/shader_recompiler/profile.h
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@ -58,6 +58,8 @@ struct Profile {
bool has_broken_unsigned_image_offsets{};
/// Signed instructions with unsigned data types are misinterpreted
bool has_broken_signed_operations{};
/// Float controls break when fp16 is enabled
bool has_broken_fp16_float_controls{};
/// Dynamic vec4 indexing is broken on some OpenGL drivers
bool has_gl_component_indexing_bug{};
/// The precise type qualifier is broken in the fragment stage of some drivers

1
src/video_core/renderer_opengl/gl_shader_cache.cpp
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@ -206,6 +206,7 @@ ShaderCache::ShaderCache(RasterizerOpenGL& rasterizer_, Core::Frontend::EmuWindo
.has_broken_spirv_clamp = true,
.has_broken_unsigned_image_offsets = true,
.has_broken_signed_operations = true,
.has_broken_fp16_float_controls = false,
.has_gl_component_indexing_bug = device.HasComponentIndexingBug(),
.has_gl_precise_bug = device.HasPreciseBug(),
.ignore_nan_fp_comparisons = true,

1
src/video_core/renderer_vulkan/vk_pipeline_cache.cpp
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@ -315,6 +315,7 @@ PipelineCache::PipelineCache(RasterizerVulkan& rasterizer_, Tegra::Engines::Maxw
.has_broken_spirv_clamp = driver_id == VK_DRIVER_ID_INTEL_PROPRIETARY_WINDOWS_KHR,
.has_broken_unsigned_image_offsets = false,
.has_broken_signed_operations = false,
.has_broken_fp16_float_controls = driver_id == VK_DRIVER_ID_NVIDIA_PROPRIETARY_KHR,
.ignore_nan_fp_comparisons = false,
};
host_info = Shader::HostTranslateInfo{