From 8722668b3c027f0132d0be07e867247debd08d30 Mon Sep 17 00:00:00 2001 From: ReinUsesLisp Date: Tue, 29 Jun 2021 18:42:17 -0300 Subject: emit_spirv: Workaround VK_KHR_shader_float_controls on fp16 Nvidia Fix regression on Fire Emblem: Three Houses when using native fp16. --- src/shader_recompiler/backend/spirv/emit_spirv.cpp | 13 ++++++++----- src/shader_recompiler/profile.h | 2 ++ 2 files changed, 10 insertions(+), 5 deletions(-) (limited to 'src/shader_recompiler') diff --git a/src/shader_recompiler/backend/spirv/emit_spirv.cpp b/src/shader_recompiler/backend/spirv/emit_spirv.cpp index ddb86d070..d7a86e270 100644 --- a/src/shader_recompiler/backend/spirv/emit_spirv.cpp +++ b/src/shader_recompiler/backend/spirv/emit_spirv.cpp @@ -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); diff --git a/src/shader_recompiler/profile.h b/src/shader_recompiler/profile.h index ee1887b56..6ff12387b 100644 --- a/src/shader_recompiler/profile.h +++ b/src/shader_recompiler/profile.h @@ -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 -- cgit v1.2.3