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Shader_Ir: Implement F16 Variants of F2F, F2I, I2F.

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This commit takes care of implementing the F16 Variants of the 
conversion instructions and makes sure conversions are done.
This commit is contained in:
Fernando Sahmkow 2019-07-20 17:38:25 -04:00
parent 0a67416971
commit 11f4e739bd
5 changed files with 75 additions and 18 deletions
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2
src/video_core/engines/shader_bytecode.h
View file

@ -1018,8 +1018,6 @@ union Instruction {
} f2i;
union {
BitField<8, 2, Register::Size> src_size;
BitField<10, 2, Register::Size> dst_size;
BitField<39, 4, u64> rounding;
// H0, H1 extract for F16 missing
BitField<41, 1, u64> selector; // Guessed as some games set it, TODO: reverse this value

18
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
View file

@ -1122,6 +1122,16 @@ private:
Type::Float);
}
std::string FCastHalf0(Operation operation) {
const std::string op_a = VisitOperand(operation, 0, Type::HalfFloat);
return fmt::format("({})[0]", op_a);
}
std::string FCastHalf1(Operation operation) {
const std::string op_a = VisitOperand(operation, 0, Type::HalfFloat);
return fmt::format("({})[1]", op_a);
}
template <Type type>
std::string Min(Operation operation) {
return GenerateBinaryCall(operation, "min", type, type, type);
@ -1278,6 +1288,11 @@ private:
return ApplyPrecise(operation, BitwiseCastResult(clamped, Type::HalfFloat));
}
std::string HCastFloat(Operation operation) {
const std::string op_a = VisitOperand(operation, 0, Type::Float);
return fmt::format("fromHalf2(vec2({}, 0.0f))", op_a);
}
std::string HUnpack(Operation operation) {
const std::string operand{VisitOperand(operation, 0, Type::HalfFloat)};
const auto value = [&]() -> std::string {
@ -1718,6 +1733,8 @@ private:
&GLSLDecompiler::Negate<Type::Float>,
&GLSLDecompiler::Absolute<Type::Float>,
&GLSLDecompiler::FClamp,
&GLSLDecompiler::FCastHalf0,
&GLSLDecompiler::FCastHalf1,
&GLSLDecompiler::Min<Type::Float>,
&GLSLDecompiler::Max<Type::Float>,
&GLSLDecompiler::FCos,
@ -1778,6 +1795,7 @@ private:
&GLSLDecompiler::Absolute<Type::HalfFloat>,
&GLSLDecompiler::HNegate,
&GLSLDecompiler::HClamp,
&GLSLDecompiler::HCastFloat,
&GLSLDecompiler::HUnpack,
&GLSLDecompiler::HMergeF32,
&GLSLDecompiler::HMergeH0,

18
src/video_core/renderer_vulkan/vk_shader_decompiler.cpp
View file

@ -735,6 +735,16 @@ private:
return {};
}
Id FCastHalf0(Operation operation) {
UNIMPLEMENTED();
return {};
}
Id FCastHalf1(Operation operation) {
UNIMPLEMENTED();
return {};
}
Id HNegate(Operation operation) {
UNIMPLEMENTED();
return {};
@ -745,6 +755,11 @@ private:
return {};
}
Id HCastFloat(Operation operation) {
UNIMPLEMENTED();
return {};
}
Id HUnpack(Operation operation) {
UNIMPLEMENTED();
return {};
@ -1210,6 +1225,8 @@ private:
&SPIRVDecompiler::Unary<&Module::OpFNegate, Type::Float>,
&SPIRVDecompiler::Unary<&Module::OpFAbs, Type::Float>,
&SPIRVDecompiler::Ternary<&Module::OpFClamp, Type::Float>,
&SPIRVDecompiler::FCastHalf0,
&SPIRVDecompiler::FCastHalf1,
&SPIRVDecompiler::Binary<&Module::OpFMin, Type::Float>,
&SPIRVDecompiler::Binary<&Module::OpFMax, Type::Float>,
&SPIRVDecompiler::Unary<&Module::OpCos, Type::Float>,
@ -1270,6 +1287,7 @@ private:
&SPIRVDecompiler::Unary<&Module::OpFAbs, Type::HalfFloat>,
&SPIRVDecompiler::HNegate,
&SPIRVDecompiler::HClamp,
&SPIRVDecompiler::HCastFloat,
&SPIRVDecompiler::HUnpack,
&SPIRVDecompiler::HMergeF32,
&SPIRVDecompiler::HMergeH0,

30
src/video_core/shader/decode/conversion.cpp
View file

@ -57,7 +57,7 @@ u32 ShaderIR::DecodeConversion(NodeBlock& bb, u32 pc) {
case OpCode::Id::I2F_R:
case OpCode::Id::I2F_C:
case OpCode::Id::I2F_IMM: {
UNIMPLEMENTED_IF(instr.conversion.dst_size != Register::Size::Word);
UNIMPLEMENTED_IF(instr.conversion.dst_size == Register::Size::Long);
UNIMPLEMENTED_IF(instr.conversion.selector);
UNIMPLEMENTED_IF_MSG(instr.generates_cc,
"Condition codes generation in I2F is not implemented");
@ -82,14 +82,19 @@ u32 ShaderIR::DecodeConversion(NodeBlock& bb, u32 pc) {
value = GetOperandAbsNegFloat(value, false, instr.conversion.negate_a);
SetInternalFlagsFromFloat(bb, value, instr.generates_cc);
if (instr.conversion.dst_size == Register::Size::Short) {
value = Operation(OperationCode::HCastFloat, PRECISE, value);
}
SetRegister(bb, instr.gpr0, value);
break;
}
case OpCode::Id::F2F_R:
case OpCode::Id::F2F_C:
case OpCode::Id::F2F_IMM: {
UNIMPLEMENTED_IF(instr.conversion.f2f.dst_size != Register::Size::Word);
UNIMPLEMENTED_IF(instr.conversion.f2f.src_size != Register::Size::Word);
UNIMPLEMENTED_IF(instr.conversion.dst_size == Register::Size::Long);
UNIMPLEMENTED_IF(instr.conversion.src_size == Register::Size::Long);
UNIMPLEMENTED_IF_MSG(instr.generates_cc,
"Condition codes generation in F2F is not implemented");
@ -107,6 +112,11 @@ u32 ShaderIR::DecodeConversion(NodeBlock& bb, u32 pc) {
}
}();
if (instr.conversion.src_size == Register::Size::Short) {
// TODO: figure where extract is sey in the encoding
value = Operation(OperationCode::FCastHalf0, PRECISE, value);
}
value = GetOperandAbsNegFloat(value, instr.conversion.abs_a, instr.conversion.negate_a);
value = [&]() {
@ -124,19 +134,24 @@ u32 ShaderIR::DecodeConversion(NodeBlock& bb, u32 pc) {
default:
UNIMPLEMENTED_MSG("Unimplemented F2F rounding mode {}",
static_cast<u32>(instr.conversion.f2f.rounding.Value()));
return Immediate(0);
return value;
}
}();
value = GetSaturatedFloat(value, instr.alu.saturate_d);
SetInternalFlagsFromFloat(bb, value, instr.generates_cc);
if (instr.conversion.dst_size == Register::Size::Short) {
value = Operation(OperationCode::HCastFloat, PRECISE, value);
}
SetRegister(bb, instr.gpr0, value);
break;
}
case OpCode::Id::F2I_R:
case OpCode::Id::F2I_C:
case OpCode::Id::F2I_IMM: {
UNIMPLEMENTED_IF(instr.conversion.src_size != Register::Size::Word);
UNIMPLEMENTED_IF(instr.conversion.src_size == Register::Size::Long);
UNIMPLEMENTED_IF_MSG(instr.generates_cc,
"Condition codes generation in F2I is not implemented");
Node value = [&]() {
@ -153,6 +168,11 @@ u32 ShaderIR::DecodeConversion(NodeBlock& bb, u32 pc) {
}
}();
if (instr.conversion.src_size == Register::Size::Short) {
// TODO: figure where extract is sey in the encoding
value = Operation(OperationCode::FCastHalf0, PRECISE, value);
}
value = GetOperandAbsNegFloat(value, instr.conversion.abs_a, instr.conversion.negate_a);
value = [&]() {

3
src/video_core/shader/node.h
View file

@ -30,6 +30,8 @@ enum class OperationCode {
FNegate, /// (MetaArithmetic, float a) -> float
FAbsolute, /// (MetaArithmetic, float a) -> float
FClamp, /// (MetaArithmetic, float value, float min, float max) -> float
FCastHalf0, /// (MetaArithmetic, f16vec2 a) -> float
FCastHalf1, /// (MetaArithmetic, f16vec2 a) -> float
FMin, /// (MetaArithmetic, float a, float b) -> float
FMax, /// (MetaArithmetic, float a, float b) -> float
FCos, /// (MetaArithmetic, float a) -> float
@ -89,6 +91,7 @@ enum class OperationCode {
HAbsolute, /// (f16vec2 a) -> f16vec2
HNegate, /// (f16vec2 a, bool first, bool second) -> f16vec2
HClamp, /// (f16vec2 src, float min, float max) -> f16vec2
HCastFloat, /// (MetaArithmetic, float a) -> f16vec2
HUnpack, /// (Tegra::Shader::HalfType, T value) -> f16vec2
HMergeF32, /// (f16vec2 src) -> float
HMergeH0, /// (f16vec2 dest, f16vec2 src) -> f16vec2