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Merge pull request #355 from Subv/shader_instr

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ShaderGen: Fixed TEXS overriding its own texcoords and implemented fmul32i
This commit is contained in:
bunnei 2018-04-19 21:09:02 -04:00 committed by GitHub
commit f633b0c875
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 39 additions and 11 deletions
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17
src/video_core/engines/shader_bytecode.h
View file

@ -90,6 +90,7 @@ union OpCode {
enum class Id : u64 {
TEXS = 0x6C,
IPA = 0xE0,
FMUL32_IMM = 0x1E,
FFMA_IMM = 0x65,
FFMA_CR = 0x93,
FFMA_RC = 0xA3,
@ -142,6 +143,7 @@ union OpCode {
switch (op2) {
case Id::IPA:
case Id::FMUL32_IMM:
return op2;
}
@ -235,6 +237,7 @@ union OpCode {
info_table[Id::FMUL_R] = {Type::Arithmetic, "fmul_r"};
info_table[Id::FMUL_C] = {Type::Arithmetic, "fmul_c"};
info_table[Id::FMUL_IMM] = {Type::Arithmetic, "fmul_imm"};
info_table[Id::FMUL32_IMM] = {Type::Arithmetic, "fmul32_imm"};
info_table[Id::FSETP_C] = {Type::Arithmetic, "fsetp_c"};
info_table[Id::FSETP_R] = {Type::Arithmetic, "fsetp_r"};
info_table[Id::EXIT] = {Type::Trivial, "exit"};
@ -309,7 +312,8 @@ union Instruction {
BitField<39, 8, Register> gpr39;
union {
BitField<20, 19, u64> imm20;
BitField<20, 19, u64> imm20_19;
BitField<20, 32, u64> imm20_32;
BitField<45, 1, u64> negate_b;
BitField<46, 1, u64> abs_a;
BitField<48, 1, u64> negate_a;
@ -317,14 +321,21 @@ union Instruction {
BitField<50, 1, u64> abs_d;
BitField<56, 1, u64> negate_imm;
float GetImm20() const {
float GetImm20_19() const {
float result{};
u32 imm{static_cast<u32>(imm20)};
u32 imm{static_cast<u32>(imm20_19)};
imm <<= 12;
imm |= negate_imm ? 0x80000000 : 0;
std::memcpy(&result, &imm, sizeof(imm));
return result;
}
float GetImm20_32() const {
float result{};
u32 imm{static_cast<u32>(imm20_32)};
std::memcpy(&result, &imm, sizeof(imm));
return result;
}
} alu;
union {

33
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
View file

@ -190,9 +190,14 @@ private:
}
}
/// Generates code representing an immediate value
static std::string GetImmediate(const Instruction& instr) {
return std::to_string(instr.alu.GetImm20());
/// Generates code representing a 19-bit immediate value
static std::string GetImmediate19(const Instruction& instr) {
return std::to_string(instr.alu.GetImm20_19());
}
/// Generates code representing a 32-bit immediate value
static std::string GetImmediate32(const Instruction& instr) {
return std::to_string(instr.alu.GetImm20_32());
}
/// Generates code representing a temporary (GPR) register.
@ -276,7 +281,7 @@ private:
std::string op_b = instr.alu.negate_b ? "-" : "";
if (instr.is_b_imm) {
op_b += GetImmediate(instr);
op_b += GetImmediate19(instr);
} else {
if (instr.is_b_gpr) {
op_b += GetRegister(instr.gpr20);
@ -296,6 +301,11 @@ private:
SetDest(0, dest, op_a + " * " + op_b, 1, 1, instr.alu.abs_d);
break;
}
case OpCode::Id::FMUL32_IMM: {
// fmul32i doesn't have abs or neg bits.
SetDest(0, dest, GetRegister(instr.gpr8) + " * " + GetImmediate32(instr), 1, 1);
break;
}
case OpCode::Id::FADD_C:
case OpCode::Id::FADD_R:
case OpCode::Id::FADD_IMM: {
@ -364,7 +374,7 @@ private:
break;
}
case OpCode::Id::FFMA_IMM: {
op_b += GetImmediate(instr);
op_b += GetImmediate19(instr);
op_c += GetRegister(instr.gpr39);
break;
}
@ -399,11 +409,18 @@ private:
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 + ")";
const std::string coord = "vec2 coords = vec2(" + op_a + ", " + op_b + ");";
// Add an extra scope and declare the texture coords inside to prevent overwriting
// them in case they are used as outputs of the texs instruction.
shader.AddLine("{");
++shader.scope;
shader.AddLine(coord);
const std::string texture = "texture(" + sampler + ", coords)";
for (unsigned elem = 0; elem < instr.attribute.fmt20.size; ++elem) {
SetDest(elem, GetRegister(instr.gpr0, elem), texture, 1, 4);
}
--shader.scope;
shader.AddLine("}");
break;
}
default: {
@ -586,7 +603,7 @@ private:
std::set<Attribute::Index> declr_input_attribute;
std::set<Attribute::Index> declr_output_attribute;
std::array<ConstBufferEntry, Maxwell3D::Regs::MaxConstBuffers> declr_const_buffers;
};
}; // namespace Decompiler
std::string GetCommonDeclarations() {
return "bool exec_shader();";