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Merge pull request #416 from bunnei/shader-ints-p3 

gl_shader_decompiler: Implement MOV32I, partially implement I2I, I2F
This commit is contained in:
bunnei 2018-04-29 12:56:16 -04:00 committed by GitHub
parent 49d92aa661 0c01c34eff
commit 6c464a2a4a
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 206 additions and 114 deletions
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33
src/video_core/engines/shader_bytecode.h
View File

@ -25,6 +25,13 @@ struct Register {
/// Register 255 is special cased to always be 0
static constexpr size_t ZeroIndex = 255;
enum class Size : u64 {
Byte = 0,
Short = 1,
Word = 2,
Long = 3,
};
constexpr Register() = default;
constexpr Register(u64 value) : value(value) {}
@ -236,6 +243,15 @@ union Instruction {
BitField<56, 1, u64> neg_imm;
} fset;
union {
BitField<10, 2, Register::Size> size;
BitField<13, 1, u64> is_signed;
BitField<41, 2, u64> selector;
BitField<45, 1, u64> negate_a;
BitField<49, 1, u64> abs_a;
BitField<50, 1, u64> saturate_a;
} conversion;
BitField<61, 1, u64> is_b_imm;
BitField<60, 1, u64> is_b_gpr;
BitField<59, 1, u64> is_c_gpr;
@ -290,7 +306,7 @@ public:
MOV_C,
MOV_R,
MOV_IMM,
MOV32I,
MOV32_IMM,
SHR_C,
SHR_R,
SHR_IMM,
@ -314,6 +330,7 @@ public:
FloatSet,
FloatSetPredicate,
IntegerSetPredicate,
Conversion,
Unknown,
};
@ -435,20 +452,20 @@ private:
INST("0100110010110---", Id::F2I_C, Type::Arithmetic, "F2I_C"),
INST("0101110010110---", Id::F2I_R, Type::Arithmetic, "F2I_R"),
INST("0011100-10110---", Id::F2I_IMM, Type::Arithmetic, "F2I_IMM"),
INST("0100110010111---", Id::I2F_C, Type::Arithmetic, "I2F_C"),
INST("0101110010111---", Id::I2F_R, Type::Arithmetic, "I2F_R"),
INST("0011100-10111---", Id::I2F_IMM, Type::Arithmetic, "I2F_IMM"),
INST("0100110011100---", Id::I2I_C, Type::Arithmetic, "I2I_C"),
INST("0101110011100---", Id::I2I_R, Type::Arithmetic, "I2I_R"),
INST("01110001-1000---", Id::I2I_IMM, Type::Arithmetic, "I2I_IMM"),
INST("000001----------", Id::LOP32I, Type::Arithmetic, "LOP32I"),
INST("0100110010011---", Id::MOV_C, Type::Arithmetic, "MOV_C"),
INST("0101110010011---", Id::MOV_R, Type::Arithmetic, "MOV_R"),
INST("0011100-10011---", Id::MOV_IMM, Type::Arithmetic, "MOV_IMM"),
INST("000000010000----", Id::MOV32I, Type::Arithmetic, "MOV32I"),
INST("000000010000----", Id::MOV32_IMM, Type::Arithmetic, "MOV32_IMM"),
INST("0100110000101---", Id::SHR_C, Type::Arithmetic, "SHR_C"),
INST("0101110000101---", Id::SHR_R, Type::Arithmetic, "SHR_R"),
INST("0011100-00101---", Id::SHR_IMM, Type::Arithmetic, "SHR_IMM"),
INST("0100110011100---", Id::I2I_C, Type::Conversion, "I2I_C"),
INST("0101110011100---", Id::I2I_R, Type::Conversion, "I2I_R"),
INST("01110001-1000---", Id::I2I_IMM, Type::Conversion, "I2I_IMM"),
INST("0100110010111---", Id::I2F_C, Type::Conversion, "I2F_C"),
INST("0101110010111---", Id::I2F_R, Type::Conversion, "I2F_R"),
INST("0011100-10111---", Id::I2F_IMM, Type::Conversion, "I2F_IMM"),
INST("01011000--------", Id::FSET_R, Type::FloatSet, "FSET_R"),
INST("0100100---------", Id::FSET_C, Type::FloatSet, "FSET_C"),
INST("0011000---------", Id::FSET_IMM, Type::FloatSet, "FSET_IMM"),

287
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
View File

@ -153,85 +153,61 @@ private:
*/
class GLSLRegister {
public:
GLSLRegister(size_t index, ShaderWriter& shader)
: index{index}, shader{shader}, float_str{"freg_" + std::to_string(index)},
integer_str{"ireg_" + std::to_string(index)} {}
enum class Type {
Float,
Integer,
UnsignedInteger,
};
/// Returns a GLSL string representing the current state of the register
const std::string& GetActiveString() {
declr_type.insert(active_type);
GLSLRegister(size_t index, ShaderWriter& shader) : index{index}, shader{shader} {}
switch (active_type) {
/// Gets the GLSL type string for a register
static std::string GetTypeString(Type type) {
switch (type) {
case Type::Float:
return float_str;
return "float";
case Type::Integer:
return integer_str;
return "int";
case Type::UnsignedInteger:
return "uint";
}
UNREACHABLE();
return float_str;
return {};
}
/// Returns a GLSL string representing the register as a float
const std::string& GetFloatString() const {
ASSERT(IsFloatUsed());
return float_str;
/// Gets the GLSL register prefix string, used for declarations and referencing
static std::string GetPrefixString(Type type) {
return "reg_" + GetTypeString(type) + '_';
}
/// Returns a GLSL string representing the register as an integer
const std::string& GetIntegerString() const {
ASSERT(IsIntegerUsed());
return integer_str;
/// Returns a GLSL string representing the current state of the register
const std::string GetActiveString() {
declr_type.insert(active_type);
return GetPrefixString(active_type) + std::to_string(index);
}
/// Convert the current register state from float to integer
void FloatToInteger() {
ASSERT(active_type == Type::Float);
const std::string src = GetActiveString();
active_type = Type::Integer;
const std::string dest = GetActiveString();
shader.AddLine(dest + " = floatBitsToInt(" + src + ");");
}
/// Convert the current register state from integer to float
void IntegerToFloat() {
ASSERT(active_type == Type::Integer);
const std::string src = GetActiveString();
active_type = Type::Float;
const std::string dest = GetActiveString();
shader.AddLine(dest + " = intBitsToFloat(" + src + ");");
}
/// Returns true if the register was ever used as a float, used for register declarations
bool IsFloatUsed() const {
return declr_type.find(Type::Float) != declr_type.end();
}
/// Returns true if the register was ever used as an integer, used for register declarations
bool IsIntegerUsed() const {
return declr_type.find(Type::Integer) != declr_type.end();
}
/// Returns true if the active type is float
/// Returns true if the active type is a float
bool IsFloat() const {
return active_type == Type::Float;
}
/// Returns true if the active type is integer
/// Returns true if the active type is an integer
bool IsInteger() const {
return active_type == Type::Integer;
}
private:
enum class Type {
Float,
Integer,
};
/// Returns the index of the register
size_t GetIndex() const {
return index;
}
/// Returns a set of the declared types of the register
const std::set<Type>& DeclaredTypes() const {
return declr_type;
}
private:
const size_t index;
const std::string float_str;
const std::string integer_str;
@ -254,18 +230,35 @@ public:
BuildRegisterList();
}
/// Generates code representing a temporary (GPR) register.
std::string GetRegister(const Register& reg, unsigned elem = 0) {
if (reg == Register::ZeroIndex) {
return "0";
}
return regs[reg.GetSwizzledIndex(elem)].GetActiveString();
/**
* Gets a register as an float.
* @param reg The register to get.
* @param elem The element to use for the operation.
* @returns GLSL string corresponding to the register as a float.
*/
std::string GetRegisterAsFloat(const Register& reg, unsigned elem = 0) {
ASSERT(regs[reg].IsFloat());
return GetRegister(reg, elem);
}
/**
* Writes code that does a register assignment to float value operation. Should only be used
* with shader instructions that deal with floats.
* Gets a register as an integer.
* @param reg The register to get.
* @param elem The element to use for the operation.
* @param is_signed Whether to get the register as a signed (or unsigned) integer.
* @returns GLSL string corresponding to the register as an integer.
*/
std::string GetRegisterAsInteger(const Register& reg, unsigned elem = 0,
bool is_signed = true) {
const std::string func = GetGLSLConversionFunc(
GLSLRegister::Type::Float,
is_signed ? GLSLRegister::Type::Integer : GLSLRegister::Type::UnsignedInteger);
return func + '(' + GetRegister(reg, elem) + ')';
}
/**
* Writes code that does a register assignment to float value operation.
* @param reg The destination register to use.
* @param elem The element to use for the operation.
* @param value The code representing the value to assign.
@ -277,21 +270,28 @@ public:
void SetRegisterToFloat(const Register& reg, u64 elem, const std::string& value,
u64 dest_num_components, u64 value_num_components, bool is_abs = false,
u64 dest_elem = 0) {
ASSERT(regs[reg].IsFloat());
SetRegister(reg, elem, value, dest_num_components, value_num_components, is_abs, dest_elem);
}
std::string dest = GetRegister(reg, dest_elem);
if (dest_num_components > 1) {
dest += GetSwizzle(elem);
}
/**
* Writes code that does a register assignment to integer value operation.
* @param reg The destination register to use.
* @param elem The element to use for the operation.
* @param value The code representing the value to assign.
* @param dest_num_components Number of components in the destination.
* @param value_num_components Number of components in the value.
* @param is_abs Optional, when True, applies absolute value to output.
* @param dest_elem Optional, the destination element to use for the operation.
*/
void SetRegisterToInteger(const Register& reg, bool is_signed, u64 elem,
const std::string& value, u64 dest_num_components,
u64 value_num_components, bool is_abs = false, u64 dest_elem = 0) {
const std::string func = GetGLSLConversionFunc(
is_signed ? GLSLRegister::Type::Integer : GLSLRegister::Type::UnsignedInteger,
GLSLRegister::Type::Float);
std::string src = '(' + value + ')';
if (value_num_components > 1) {
src += GetSwizzle(elem);
}
src = is_abs ? "abs(" + src + ')' : src;
shader.AddLine(dest + " = " + src + ';');
SetRegister(reg, elem, func + '(' + value + ')', dest_num_components, value_num_components,
is_abs, dest_elem);
}
/**
@ -302,7 +302,7 @@ public:
* @param attribute The input attibute to use as the source value.
*/
void SetRegisterToInputAttibute(const Register& reg, u64 elem, Attribute::Index attribute) {
std::string dest = GetRegister(reg);
std::string dest = GetRegisterAsFloat(reg);
std::string src = GetInputAttribute(attribute) + GetSwizzle(elem);
if (regs[reg].IsFloat()) {
@ -323,7 +323,7 @@ public:
*/
void SetOutputAttributeToRegister(Attribute::Index attribute, u64 elem, const Register& reg) {
std::string dest = GetOutputAttribute(attribute) + GetSwizzle(elem);
std::string src = GetRegister(reg);
std::string src = GetRegisterAsFloat(reg);
ASSERT_MSG(regs[reg].IsFloat(), "Output attributes must be set to a float");
shader.AddLine(dest + " = " + src + ';');
}
@ -347,11 +347,10 @@ public:
/// Add declarations for registers
void GenerateDeclarations() {
for (const auto& reg : regs) {
if (reg.IsFloatUsed()) {
declarations.AddLine("float " + reg.GetFloatString() + " = 0.0;");
}
if (reg.IsIntegerUsed()) {
declarations.AddLine("int " + reg.GetIntegerString() + " = 0;");
for (const auto& type : reg.DeclaredTypes()) {
declarations.AddLine(GLSLRegister::GetTypeString(type) + ' ' +
GLSLRegister::GetPrefixString(type) +
std::to_string(reg.GetIndex()) + " = 0;");
}
}
declarations.AddNewLine();
@ -395,6 +394,51 @@ public:
}
private:
/// Build GLSL conversion function, e.g. floatBitsToInt, intBitsToFloat, etc.
const std::string GetGLSLConversionFunc(GLSLRegister::Type src, GLSLRegister::Type dest) const {
const std::string src_type = GLSLRegister::GetTypeString(src);
std::string dest_type = GLSLRegister::GetTypeString(dest);
dest_type[0] = toupper(dest_type[0]);
return src_type + "BitsTo" + dest_type;
}
/// Generates code representing a temporary (GPR) register.
std::string GetRegister(const Register& reg, unsigned elem) {
if (reg == Register::ZeroIndex) {
return "0";
}
return regs[reg.GetSwizzledIndex(elem)].GetActiveString();
}
/**
* Writes code that does a register assignment to value operation.
* @param reg The destination register to use.
* @param elem The element to use for the operation.
* @param value The code representing the value to assign.
* @param dest_num_components Number of components in the destination.
* @param value_num_components Number of components in the value.
* @param is_abs Optional, when True, applies absolute value to output.
* @param dest_elem Optional, the destination element to use for the operation.
*/
void SetRegister(const Register& reg, u64 elem, const std::string& value,
u64 dest_num_components, u64 value_num_components, bool is_abs,
u64 dest_elem) {
std::string dest = GetRegister(reg, dest_elem);
if (dest_num_components > 1) {
dest += GetSwizzle(elem);
}
std::string src = '(' + value + ')';
if (value_num_components > 1) {
src += GetSwizzle(elem);
}
src = is_abs ? "abs(" + src + ')' : src;
shader.AddLine(dest + " = " + src + ';');
}
/// Build the GLSL register list.
void BuildRegisterList() {
for (size_t index = 0; index < Register::NumRegisters; ++index) {
@ -598,7 +642,7 @@ private:
switch (opcode->GetType()) {
case OpCode::Type::Arithmetic: {
std::string op_a = instr.alu.negate_a ? "-" : "";
op_a += regs.GetRegister(instr.gpr8);
op_a += regs.GetRegisterAsFloat(instr.gpr8);
if (instr.alu.abs_a) {
op_a = "abs(" + op_a + ')';
}
@ -609,7 +653,7 @@ private:
op_b += GetImmediate19(instr);
} else {
if (instr.is_b_gpr) {
op_b += regs.GetRegister(instr.gpr20);
op_b += regs.GetRegisterAsFloat(instr.gpr20);
} else {
op_b += regs.GetUniform(instr.uniform, instr.gpr0);
}
@ -620,6 +664,11 @@ private:
}
switch (opcode->GetId()) {
case OpCode::Id::MOV32_IMM: {
// mov32i doesn't have abs or neg bits.
regs.SetRegisterToFloat(instr.gpr0, 0, GetImmediate32(instr), 1, 1);
break;
}
case OpCode::Id::FMUL_C:
case OpCode::Id::FMUL_R:
case OpCode::Id::FMUL_IMM: {
@ -629,8 +678,8 @@ private:
case OpCode::Id::FMUL32_IMM: {
// fmul32i doesn't have abs or neg bits.
regs.SetRegisterToFloat(
instr.gpr0, 0, regs.GetRegister(instr.gpr8) + " * " + GetImmediate32(instr), 1,
1);
instr.gpr0, 0,
regs.GetRegisterAsFloat(instr.gpr8) + " * " + GetImmediate32(instr), 1, 1);
break;
}
case OpCode::Id::FADD_C:
@ -687,29 +736,29 @@ private:
break;
}
case OpCode::Type::Ffma: {
std::string op_a = regs.GetRegister(instr.gpr8);
std::string op_a = regs.GetRegisterAsFloat(instr.gpr8);
std::string op_b = instr.ffma.negate_b ? "-" : "";
std::string op_c = instr.ffma.negate_c ? "-" : "";
switch (opcode->GetId()) {
case OpCode::Id::FFMA_CR: {
op_b += regs.GetUniform(instr.uniform, instr.gpr0);
op_c += regs.GetRegister(instr.gpr39);
op_c += regs.GetRegisterAsFloat(instr.gpr39);
break;
}
case OpCode::Id::FFMA_RR: {
op_b += regs.GetRegister(instr.gpr20);
op_c += regs.GetRegister(instr.gpr39);
op_b += regs.GetRegisterAsFloat(instr.gpr20);
op_c += regs.GetRegisterAsFloat(instr.gpr39);
break;
}
case OpCode::Id::FFMA_RC: {
op_b += regs.GetRegister(instr.gpr39);
op_b += regs.GetRegisterAsFloat(instr.gpr39);
op_c += regs.GetUniform(instr.uniform, instr.gpr0);
break;
}
case OpCode::Id::FFMA_IMM: {
op_b += GetImmediate19(instr);
op_c += regs.GetRegister(instr.gpr39);
op_c += regs.GetRegisterAsFloat(instr.gpr39);
break;
}
default: {
@ -721,6 +770,32 @@ private:
regs.SetRegisterToFloat(instr.gpr0, 0, op_a + " * " + op_b + " + " + op_c, 1, 1);
break;
}
case OpCode::Type::Conversion: {
ASSERT_MSG(instr.conversion.size == Register::Size::Word, "Unimplemented");
ASSERT_MSG(!instr.conversion.selector, "Unimplemented");
ASSERT_MSG(!instr.conversion.negate_a, "Unimplemented");
ASSERT_MSG(!instr.conversion.saturate_a, "Unimplemented");
switch (opcode->GetId()) {
case OpCode::Id::I2I_R:
case OpCode::Id::I2F_R: {
std::string op_a =
regs.GetRegisterAsInteger(instr.gpr20, 0, instr.conversion.is_signed);
if (instr.conversion.abs_a) {
op_a = "abs(" + op_a + ')';
}
regs.SetRegisterToInteger(instr.gpr0, instr.conversion.is_signed, 0, op_a, 1, 1);
break;
}
default: {
NGLOG_CRITICAL(HW_GPU, "Unhandled conversion instruction: {}", opcode->GetName());
UNREACHABLE();
}
}
break;
}
case OpCode::Type::Memory: {
const Attribute::Index attribute = instr.attribute.fmt20.index;
@ -739,8 +814,8 @@ private:
}
case OpCode::Id::TEXS: {
ASSERT_MSG(instr.attribute.fmt20.size == 4, "untested");
const std::string op_a = regs.GetRegister(instr.gpr8);
const std::string op_b = regs.GetRegister(instr.gpr20);
const std::string op_a = regs.GetRegisterAsFloat(instr.gpr8);
const std::string op_b = regs.GetRegisterAsFloat(instr.gpr20);
const std::string sampler = GetSampler(instr.sampler);
const std::string coord = "vec2 coords = vec2(" + op_a + ", " + op_b + ");";
// Add an extra scope and declare the texture coords inside to prevent overwriting
@ -765,7 +840,7 @@ private:
}
case OpCode::Type::FloatSetPredicate: {
std::string op_a = instr.fsetp.neg_a ? "-" : "";
op_a += regs.GetRegister(instr.gpr8);
op_a += regs.GetRegisterAsFloat(instr.gpr8);
if (instr.fsetp.abs_a) {
op_a = "abs(" + op_a + ')';
@ -781,7 +856,7 @@ private:
op_b += '(' + GetImmediate19(instr) + ')';
} else {
if (instr.is_b_gpr) {
op_b += regs.GetRegister(instr.gpr20);
op_b += regs.GetRegisterAsFloat(instr.gpr20);
} else {
op_b += regs.GetUniform(instr.uniform, instr.gpr0);
}
@ -816,7 +891,7 @@ private:
}
case OpCode::Type::FloatSet: {
std::string op_a = instr.fset.neg_a ? "-" : "";
op_a += regs.GetRegister(instr.gpr8);
op_a += regs.GetRegisterAsFloat(instr.gpr8);
if (instr.fset.abs_a) {
op_a = "abs(" + op_a + ')';
@ -832,7 +907,7 @@ private:
op_b += imm;
} else {
if (instr.is_b_gpr) {
op_b += regs.GetRegister(instr.gpr20);
op_b += regs.GetRegisterAsFloat(instr.gpr20);
} else {
op_b += regs.GetUniform(instr.uniform, instr.gpr0);
}
@ -877,10 +952,10 @@ private:
// Final color output is currently hardcoded to GPR0-3 for fragment shaders
if (stage == Maxwell3D::Regs::ShaderStage::Fragment) {
shader.AddLine("color.r = " + regs.GetRegister(0) + ';');
shader.AddLine("color.g = " + regs.GetRegister(1) + ';');
shader.AddLine("color.b = " + regs.GetRegister(2) + ';');
shader.AddLine("color.a = " + regs.GetRegister(3) + ';');
shader.AddLine("color.r = " + regs.GetRegisterAsFloat(0) + ';');
shader.AddLine("color.g = " + regs.GetRegisterAsFloat(1) + ';');
shader.AddLine("color.b = " + regs.GetRegisterAsFloat(2) + ';');
shader.AddLine("color.a = " + regs.GetRegisterAsFloat(3) + ';');
}
shader.AddLine("return true;");