Mirrors/yuzu
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Merge pull request #3592 from ReinUsesLisp/ipa

Browse source 
shader_decompiler: Remove FragCoord.w hack and change IPA implementation
This commit is contained in:
Fernando Sahmkow 2020-04-05 19:29:40 -04:00 • committed by GitHub
commit 69277de29d
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
4 changed files with 74 additions and 68 deletions
Download patch file Download diff file Expand all files Collapse all files

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: {