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Merge pull request #3592 from ReinUsesLisp/ipa 

shader_decompiler: Remove FragCoord.w hack and change IPA implementation
nce_cpp
Fernando Sahmkow 6 years ago
committed by GitHub
parent
5e8119cf04 d66cae7bd5
commit
f6d6689b13
4 changed files with 74 additions and 68 deletions
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  1. 55
      src/video_core/engines/shader_header.h
  2. 34
      src/video_core/renderer_opengl/gl_shader_decompiler.cpp
  3. 17
      src/video_core/renderer_vulkan/vk_shader_decompiler.cpp
  4. 36
      src/video_core/shader/decode/other.cpp

55
src/video_core/engines/shader_header.h
View File

@ -4,6 +4,9 @@
#pragma once
#include <array>
#include <optional>
#include "common/bit_field.h"
#include "common/common_funcs.h"
#include "common/common_types.h"
@ -16,7 +19,7 @@ enum class OutputTopology : u32 {
TriangleStrip = 7,
};
enum class AttributeUse : u8 {
enum class PixelImap : u8 {
Unused = 0,
Constant = 1,
Perspective = 2,
@ -24,7 +27,7 @@ enum class AttributeUse : u8 {
};
// Documentation in:
// http://download.nvidia.com/open-gpu-doc/Shader-Program-Header/1/Shader-Program-Header.html#ImapTexture
// http://download.nvidia.com/open-gpu-doc/Shader-Program-Header/1/Shader-Program-Header.html
struct Header {
union {
BitField<0, 5, u32> sph_type;
@ -59,8 +62,8 @@ struct Header {
union {
BitField<0, 12, u32> max_output_vertices;
BitField<12, 8, u32> store_req_start; // NOTE: not used by geometry shaders.
BitField<24, 4, u32> reserved;
BitField<12, 8, u32> store_req_end; // NOTE: not used by geometry shaders.
BitField<20, 4, u32> reserved;
BitField<24, 8, u32> store_req_end; // NOTE: not used by geometry shaders.
} common4{};
union {
@ -93,17 +96,20 @@ struct Header {
struct {
INSERT_UNION_PADDING_BYTES(3); // ImapSystemValuesA
INSERT_UNION_PADDING_BYTES(1); // ImapSystemValuesB
union {
BitField<0, 2, AttributeUse> x;
BitField<2, 2, AttributeUse> y;
BitField<4, 2, AttributeUse> w;
BitField<6, 2, AttributeUse> z;
BitField<0, 2, PixelImap> x;
BitField<2, 2, PixelImap> y;
BitField<4, 2, PixelImap> z;
BitField<6, 2, PixelImap> w;
u8 raw;
} imap_generic_vector[32];
INSERT_UNION_PADDING_BYTES(2); // ImapColor
INSERT_UNION_PADDING_BYTES(2); // ImapSystemValuesC
INSERT_UNION_PADDING_BYTES(10); // ImapFixedFncTexture[10]
INSERT_UNION_PADDING_BYTES(2); // ImapReserved
struct {
u32 target;
union {
@ -112,31 +118,30 @@ struct Header {
BitField<2, 30, u32> reserved;
};
} omap;
bool IsColorComponentOutputEnabled(u32 render_target, u32 component) const {
const u32 bit = render_target * 4 + component;
return omap.target & (1 << bit);
}
AttributeUse GetAttributeIndexUse(u32 attribute, u32 index) const {
return static_cast<AttributeUse>(
(imap_generic_vector[attribute].raw >> (index * 2)) & 0x03);
}
AttributeUse GetAttributeUse(u32 attribute) const {
AttributeUse result = AttributeUse::Unused;
for (u32 i = 0; i < 4; i++) {
const auto index = GetAttributeIndexUse(attribute, i);
if (index == AttributeUse::Unused) {
continue;
}
if (result == AttributeUse::Unused || result == index) {
result = index;
PixelImap GetPixelImap(u32 attribute) const {
const auto get_index = [this, attribute](u32 index) {
return static_cast<PixelImap>(
(imap_generic_vector[attribute].raw >> (index * 2)) & 3);
};
std::optional<PixelImap> result;
for (u32 component = 0; component < 4; ++component) {
const PixelImap index = get_index(component);
if (index == PixelImap::Unused) {
continue;
}
LOG_CRITICAL(HW_GPU, "Generic Attribute Conflict in Interpolation Mode");
if (index == AttributeUse::Perspective) {
result = index;
if (result && result != index) {
LOG_CRITICAL(HW_GPU, "Generic attribute conflict in interpolation mode");
}
result = index;
}
return result;
return result.value_or(PixelImap::Unused);
}
} ps;

34
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
View File

@ -31,11 +31,11 @@ namespace {
using Tegra::Engines::ShaderType;
using Tegra::Shader::Attribute;
using Tegra::Shader::AttributeUse;
using Tegra::Shader::Header;
using Tegra::Shader::IpaInterpMode;
using Tegra::Shader::IpaMode;
using Tegra::Shader::IpaSampleMode;
using Tegra::Shader::PixelImap;
using Tegra::Shader::Register;
using VideoCommon::Shader::BuildTransformFeedback;
using VideoCommon::Shader::Registry;
@ -702,20 +702,19 @@ private:
code.AddNewLine();
}
std::string GetInputFlags(AttributeUse attribute) {
const char* GetInputFlags(PixelImap attribute) {
switch (attribute) {
case AttributeUse::Perspective:
// Default, Smooth
return {};
case AttributeUse::Constant:
return "flat ";
case AttributeUse::ScreenLinear:
return "noperspective ";
default:
case AttributeUse::Unused:
UNIMPLEMENTED_MSG("Unknown attribute usage index={}", static_cast<u32>(attribute));
return {};
case PixelImap::Perspective:
return "smooth";
case PixelImap::Constant:
return "flat";
case PixelImap::ScreenLinear:
return "noperspective";
case PixelImap::Unused:
break;
}
UNIMPLEMENTED_MSG("Unknown attribute usage index={}", static_cast<int>(attribute));
return {};
}
void DeclareInputAttributes() {
@ -749,8 +748,8 @@ private:
std::string suffix;
if (stage == ShaderType::Fragment) {
const auto input_mode{header.ps.GetAttributeUse(location)};
if (skip_unused && input_mode == AttributeUse::Unused) {
const auto input_mode{header.ps.GetPixelImap(location)};
if (input_mode == PixelImap::Unused) {
return;
}
suffix = GetInputFlags(input_mode);
@ -927,7 +926,7 @@ private:
const u32 address{generic_base + index * generic_stride + element * element_stride};
const bool declared = stage != ShaderType::Fragment ||
header.ps.GetAttributeUse(index) != AttributeUse::Unused;
header.ps.GetPixelImap(index) != PixelImap::Unused;
const std::string value =
declared ? ReadAttribute(attribute, element).AsFloat() : "0.0f";
code.AddLine("case 0x{:X}U: return {};", address, value);
@ -1142,8 +1141,7 @@ private:
GetSwizzle(element)),
Type::Float};
case ShaderType::Fragment:
return {element == 3 ? "1.0f" : ("gl_FragCoord"s + GetSwizzle(element)),
Type::Float};
return {"gl_FragCoord"s + GetSwizzle(element), Type::Float};
default:
UNREACHABLE();
}

17
src/video_core/renderer_vulkan/vk_shader_decompiler.cpp
View File

@ -35,7 +35,7 @@ namespace {
using Sirit::Id;
using Tegra::Engines::ShaderType;
using Tegra::Shader::Attribute;
using Tegra::Shader::AttributeUse;
using Tegra::Shader::PixelImap;
using Tegra::Shader::Register;
using namespace VideoCommon::Shader;
@ -752,16 +752,16 @@ private:
if (stage != ShaderType::Fragment) {
continue;
}
switch (header.ps.GetAttributeUse(location)) {
case AttributeUse::Constant:
switch (header.ps.GetPixelImap(location)) {
case PixelImap::Constant:
Decorate(id, spv::Decoration::Flat);
break;
case AttributeUse::ScreenLinear:
Decorate(id, spv::Decoration::NoPerspective);
break;
case AttributeUse::Perspective:
case PixelImap::Perspective:
// Default
break;
case PixelImap::ScreenLinear:
Decorate(id, spv::Decoration::NoPerspective);
break;
default:
UNREACHABLE_MSG("Unused attribute being fetched");
}
@ -1145,9 +1145,6 @@ private:
switch (attribute) {
case Attribute::Index::Position: {
if (stage == ShaderType::Fragment) {
if (element == 3) {
return {Constant(t_float, 1.0f), Type::Float};
}
return {OpLoad(t_float, AccessElement(t_in_float, frag_coord, element)),
Type::Float};
}

36
src/video_core/shader/decode/other.cpp
View File

@ -11,12 +11,17 @@
namespace VideoCommon::Shader {
using std::move;
using Tegra::Shader::ConditionCode;
using Tegra::Shader::Instruction;
using Tegra::Shader::IpaInterpMode;
using Tegra::Shader::OpCode;
using Tegra::Shader::PixelImap;
using Tegra::Shader::Register;
using Tegra::Shader::SystemVariable;
using Index = Tegra::Shader::Attribute::Index;
u32 ShaderIR::DecodeOther(NodeBlock& bb, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
@ -213,27 +218,28 @@ u32 ShaderIR::DecodeOther(NodeBlock& bb, u32 pc) {
}
case OpCode::Id::IPA: {
const bool is_physical = instr.ipa.idx && instr.gpr8.Value() != 0xff;
const auto attribute = instr.attribute.fmt28;
const Tegra::Shader::IpaMode input_mode{instr.ipa.interp_mode.Value(),
instr.ipa.sample_mode.Value()};
const Index index = attribute.index;
Node value = is_physical ? GetPhysicalInputAttribute(instr.gpr8)
: GetInputAttribute(attribute.index, attribute.element);
const Tegra::Shader::Attribute::Index index = attribute.index.Value();
const bool is_generic = index >= Tegra::Shader::Attribute::Index::Attribute_0 &&
index <= Tegra::Shader::Attribute::Index::Attribute_31;
if (is_generic || is_physical) {
// TODO(Blinkhawk): There are cases where a perspective attribute use PASS.
// In theory by setting them as perspective, OpenGL does the perspective correction.
// A way must figured to reverse the last step of it.
if (input_mode.interpolation_mode == Tegra::Shader::IpaInterpMode::Multiply) {
value = Operation(OperationCode::FMul, PRECISE, value, GetRegister(instr.gpr20));
: GetInputAttribute(index, attribute.element);
// Code taken from Ryujinx.
if (index >= Index::Attribute_0 && index <= Index::Attribute_31) {
const u32 location = static_cast<u32>(index) - static_cast<u32>(Index::Attribute_0);
if (header.ps.GetPixelImap(location) == PixelImap::Perspective) {
Node position_w = GetInputAttribute(Index::Position, 3);
value = Operation(OperationCode::FMul, move(value), move(position_w));
}
}
value = GetSaturatedFloat(value, instr.ipa.saturate);
SetRegister(bb, instr.gpr0, value);
if (instr.ipa.interp_mode == IpaInterpMode::Multiply) {
value = Operation(OperationCode::FMul, move(value), GetRegister(instr.gpr20));
}
value = GetSaturatedFloat(move(value), instr.ipa.saturate);
SetRegister(bb, instr.gpr0, move(value));
break;
}
case OpCode::Id::OUT_R: {

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