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gl_shader_decompiler: Add support for TEXS instruction.

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This commit is contained in:
bunnei 2018-04-10 01:26:15 -04:00
parent 5ba71369ac
commit 8b4443c966
2 changed files with 43 additions and 12 deletions
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19
src/video_core/engines/shader_bytecode.h
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@ -16,10 +16,6 @@ struct Register {
constexpr Register(u64 value) : value(value) {}
constexpr u64 GetIndex() const {
return value;
}
constexpr operator u64() const {
return value;
}
@ -71,6 +67,19 @@ union Attribute {
u64 value;
};
union Sampler {
Sampler() = default;
constexpr Sampler(u64 value) : value(value) {}
enum class Index : u64 {
Sampler_0 = 8,
};
BitField<36, 13, Index> index;
u64 value;
};
union Uniform {
BitField<20, 14, u64> offset;
BitField<34, 5, u64> index;
@ -295,7 +304,6 @@ union Instruction {
BitField<20, 8, Register> gpr20;
BitField<20, 7, SubOp> sub_op;
BitField<28, 8, Register> gpr28;
BitField<36, 13, u64> imm36;
BitField<39, 8, Register> gpr39;
union {
@ -316,6 +324,7 @@ union Instruction {
Attribute attribute;
Uniform uniform;
Sampler sampler;
u64 hex;
};

36
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
View file

@ -17,6 +17,7 @@ using Tegra::Shader::Attribute;
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
using Tegra::Shader::Register;
using Tegra::Shader::Sampler;
using Tegra::Shader::SubOp;
using Tegra::Shader::Uniform;
@ -186,13 +187,13 @@ private:
}
/// Generates code representing a temporary (GPR) register.
std::string GetRegister(const Register& reg) {
if (stage == Maxwell3D::Regs::ShaderStage::Fragment && reg.GetIndex() < 4) {
std::string GetRegister(const Register& reg, unsigned elem = 0) {
if (stage == Maxwell3D::Regs::ShaderStage::Fragment && reg < 4) {
// GPRs 0-3 are output color for the fragment shader
return std::string{"color."} + "rgba"[reg.GetIndex()];
return std::string{"color."} + "rgba"[reg + elem];
}
return *declr_register.insert("register_" + std::to_string(reg)).first;
return *declr_register.insert("register_" + std::to_string(reg + elem)).first;
}
/// Generates code representing a uniform (C buffer) register.
@ -201,6 +202,15 @@ private:
return 'c' + std::to_string(reg.index) + '[' + std::to_string(reg.offset) + ']';
}
/// Generates code representing a texture sampler.
std::string GetSampler(const Sampler& sampler) const {
// TODO(Subv): Support more than just texture sampler 0
ASSERT_MSG(sampler.index == Sampler::Index::Sampler_0, "unsupported");
const unsigned index{static_cast<unsigned>(sampler.index.Value()) -
static_cast<unsigned>(Sampler::Index::Sampler_0)};
return "tex[" + std::to_string(index) + "]";
}
/**
* Adds code that calls a subroutine.
* @param subroutine the subroutine to call.
@ -245,7 +255,7 @@ private:
switch (OpCode::GetInfo(instr.opcode).type) {
case OpCode::Type::Arithmetic: {
ASSERT(!instr.alu.abs_d);
ASSERT_MSG(!instr.alu.abs_d, "unimplemented");
std::string dest = GetRegister(instr.gpr0);
std::string op_a = instr.alu.negate_a ? "-" : "";
@ -330,15 +340,27 @@ private:
switch (instr.opcode.EffectiveOpCode()) {
case OpCode::Id::LD_A: {
ASSERT(instr.attribute.fmt20.size == 0);
ASSERT_MSG(instr.attribute.fmt20.size == 0, "untested");
SetDest(instr.attribute.fmt20.element, gpr0, GetInputAttribute(attribute), 1, 4);
break;
}
case OpCode::Id::ST_A: {
ASSERT(instr.attribute.fmt20.size == 0);
ASSERT_MSG(instr.attribute.fmt20.size == 0, "untested");
SetDest(instr.attribute.fmt20.element, GetOutputAttribute(attribute), gpr0, 4, 1);
break;
}
case OpCode::Id::TEXS: {
ASSERT_MSG(instr.attribute.fmt20.size == 4, "untested");
const std::string op_a = GetRegister(instr.gpr8);
const std::string op_b = GetRegister(instr.gpr20);
const std::string sampler = GetSampler(instr.sampler);
const std::string coord = "vec2(" + op_a + ", " + op_b + ")";
const std::string texture = "texture(" + sampler + ", " + coord + ")";
for (unsigned elem = 0; elem < instr.attribute.fmt20.size; ++elem) {
SetDest(elem, GetRegister(instr.gpr0, elem), texture, 1, 4);
}
break;
}
default: {
LOG_CRITICAL(HW_GPU, "Unhandled memory instruction: 0x%02x (%s): 0x%08x",
static_cast<unsigned>(instr.opcode.EffectiveOpCode()),