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gerrit-public.fairphone.software / platform / external / skia / 71fecc32b1b4f71ef3c6467b1f5e0b55c2a12428 / . / src / sksl / SkSLSPIRVCodeGenerator.cpp
blob: b5cd54abae203f591fecda3f99331c2c18ed82aa [file] [log] [blame]
/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkSLSPIRVCodeGenerator.h"
#include "string.h"
#include "GLSL.std.450.h"
#include "ir/SkSLExpressionStatement.h"
#include "ir/SkSLExtension.h"
#include "ir/SkSLIndexExpression.h"
#include "ir/SkSLVariableReference.h"
#include "SkSLCompiler.h"
namespace SkSL {
#define SPIRV_DEBUG 0
static const int32_t SKSL_MAGIC = 0x0; // FIXME: we should probably register a magic number
void SPIRVCodeGenerator::setupIntrinsics() {
#define ALL_GLSL(x) std::make_tuple(kGLSL_STD_450_IntrinsicKind, GLSLstd450 ## x, GLSLstd450 ## x, \
GLSLstd450 ## x, GLSLstd450 ## x)
#define BY_TYPE_GLSL(ifFloat, ifInt, ifUInt) std::make_tuple(kGLSL_STD_450_IntrinsicKind, \
GLSLstd450 ## ifFloat, \
GLSLstd450 ## ifInt, \
GLSLstd450 ## ifUInt, \
SpvOpUndef)
#define SPECIAL(x) std::make_tuple(kSpecial_IntrinsicKind, k ## x ## _SpecialIntrinsic, \
k ## x ## _SpecialIntrinsic, k ## x ## _SpecialIntrinsic, \
k ## x ## _SpecialIntrinsic)
fIntrinsicMap[SkString("round")] = ALL_GLSL(Round);
fIntrinsicMap[SkString("roundEven")] = ALL_GLSL(RoundEven);
fIntrinsicMap[SkString("trunc")] = ALL_GLSL(Trunc);
fIntrinsicMap[SkString("abs")] = BY_TYPE_GLSL(FAbs, SAbs, SAbs);
fIntrinsicMap[SkString("sign")] = BY_TYPE_GLSL(FSign, SSign, SSign);
fIntrinsicMap[SkString("floor")] = ALL_GLSL(Floor);
fIntrinsicMap[SkString("ceil")] = ALL_GLSL(Ceil);
fIntrinsicMap[SkString("fract")] = ALL_GLSL(Fract);
fIntrinsicMap[SkString("radians")] = ALL_GLSL(Radians);
fIntrinsicMap[SkString("degrees")] = ALL_GLSL(Degrees);
fIntrinsicMap[SkString("sin")] = ALL_GLSL(Sin);
fIntrinsicMap[SkString("cos")] = ALL_GLSL(Cos);
fIntrinsicMap[SkString("tan")] = ALL_GLSL(Tan);
fIntrinsicMap[SkString("asin")] = ALL_GLSL(Asin);
fIntrinsicMap[SkString("acos")] = ALL_GLSL(Acos);
fIntrinsicMap[SkString("atan")] = SPECIAL(Atan);
fIntrinsicMap[SkString("sinh")] = ALL_GLSL(Sinh);
fIntrinsicMap[SkString("cosh")] = ALL_GLSL(Cosh);
fIntrinsicMap[SkString("tanh")] = ALL_GLSL(Tanh);
fIntrinsicMap[SkString("asinh")] = ALL_GLSL(Asinh);
fIntrinsicMap[SkString("acosh")] = ALL_GLSL(Acosh);
fIntrinsicMap[SkString("atanh")] = ALL_GLSL(Atanh);
fIntrinsicMap[SkString("pow")] = ALL_GLSL(Pow);
fIntrinsicMap[SkString("exp")] = ALL_GLSL(Exp);
fIntrinsicMap[SkString("log")] = ALL_GLSL(Log);
fIntrinsicMap[SkString("exp2")] = ALL_GLSL(Exp2);
fIntrinsicMap[SkString("log2")] = ALL_GLSL(Log2);
fIntrinsicMap[SkString("sqrt")] = ALL_GLSL(Sqrt);
fIntrinsicMap[SkString("inversesqrt")] = ALL_GLSL(InverseSqrt);
fIntrinsicMap[SkString("determinant")] = ALL_GLSL(Determinant);
fIntrinsicMap[SkString("matrixInverse")] = ALL_GLSL(MatrixInverse);
fIntrinsicMap[SkString("mod")] = std::make_tuple(kSPIRV_IntrinsicKind, SpvOpFMod,
SpvOpSMod, SpvOpUMod, SpvOpUndef);
fIntrinsicMap[SkString("min")] = BY_TYPE_GLSL(FMin, SMin, UMin);
fIntrinsicMap[SkString("max")] = BY_TYPE_GLSL(FMax, SMax, UMax);
fIntrinsicMap[SkString("clamp")] = BY_TYPE_GLSL(FClamp, SClamp, UClamp);
fIntrinsicMap[SkString("dot")] = std::make_tuple(kSPIRV_IntrinsicKind, SpvOpDot,
SpvOpUndef, SpvOpUndef, SpvOpUndef);
fIntrinsicMap[SkString("mix")] = ALL_GLSL(FMix);
fIntrinsicMap[SkString("step")] = ALL_GLSL(Step);
fIntrinsicMap[SkString("smoothstep")] = ALL_GLSL(SmoothStep);
fIntrinsicMap[SkString("fma")] = ALL_GLSL(Fma);
fIntrinsicMap[SkString("frexp")] = ALL_GLSL(Frexp);
fIntrinsicMap[SkString("ldexp")] = ALL_GLSL(Ldexp);
#define PACK(type) fIntrinsicMap[SkString("pack" #type)] = ALL_GLSL(Pack ## type); \
fIntrinsicMap[SkString("unpack" #type)] = ALL_GLSL(Unpack ## type)
PACK(Snorm4x8);
PACK(Unorm4x8);
PACK(Snorm2x16);
PACK(Unorm2x16);
PACK(Half2x16);
PACK(Double2x32);
fIntrinsicMap[SkString("length")] = ALL_GLSL(Length);
fIntrinsicMap[SkString("distance")] = ALL_GLSL(Distance);
fIntrinsicMap[SkString("cross")] = ALL_GLSL(Cross);
fIntrinsicMap[SkString("normalize")] = ALL_GLSL(Normalize);
fIntrinsicMap[SkString("faceForward")] = ALL_GLSL(FaceForward);
fIntrinsicMap[SkString("reflect")] = ALL_GLSL(Reflect);
fIntrinsicMap[SkString("refract")] = ALL_GLSL(Refract);
fIntrinsicMap[SkString("findLSB")] = ALL_GLSL(FindILsb);
fIntrinsicMap[SkString("findMSB")] = BY_TYPE_GLSL(FindSMsb, FindSMsb, FindUMsb);
fIntrinsicMap[SkString("dFdx")] = std::make_tuple(kSPIRV_IntrinsicKind, SpvOpDPdx,
SpvOpUndef, SpvOpUndef, SpvOpUndef);
fIntrinsicMap[SkString("dFdy")] = std::make_tuple(kSPIRV_IntrinsicKind, SpvOpDPdy,
SpvOpUndef, SpvOpUndef, SpvOpUndef);
fIntrinsicMap[SkString("dFdy")] = std::make_tuple(kSPIRV_IntrinsicKind, SpvOpDPdy,
SpvOpUndef, SpvOpUndef, SpvOpUndef);
fIntrinsicMap[SkString("texture")] = SPECIAL(Texture);
fIntrinsicMap[SkString("texture2D")] = SPECIAL(Texture2D);
fIntrinsicMap[SkString("textureProj")] = SPECIAL(TextureProj);
fIntrinsicMap[SkString("any")] = std::make_tuple(kSPIRV_IntrinsicKind, SpvOpUndef,
SpvOpUndef, SpvOpUndef, SpvOpAny);
fIntrinsicMap[SkString("all")] = std::make_tuple(kSPIRV_IntrinsicKind, SpvOpUndef,
SpvOpUndef, SpvOpUndef, SpvOpAll);
fIntrinsicMap[SkString("equal")] = std::make_tuple(kSPIRV_IntrinsicKind,
SpvOpFOrdEqual, SpvOpIEqual,
SpvOpIEqual, SpvOpLogicalEqual);
fIntrinsicMap[SkString("notEqual")] = std::make_tuple(kSPIRV_IntrinsicKind,
SpvOpFOrdNotEqual, SpvOpINotEqual,
SpvOpINotEqual,
SpvOpLogicalNotEqual);
fIntrinsicMap[SkString("lessThan")] = std::make_tuple(kSPIRV_IntrinsicKind,
SpvOpSLessThan, SpvOpULessThan,
SpvOpFOrdLessThan, SpvOpUndef);
fIntrinsicMap[SkString("lessThanEqual")] = std::make_tuple(kSPIRV_IntrinsicKind,
SpvOpSLessThanEqual,
SpvOpULessThanEqual,
SpvOpFOrdLessThanEqual,
SpvOpUndef);
fIntrinsicMap[SkString("greaterThan")] = std::make_tuple(kSPIRV_IntrinsicKind,
SpvOpSGreaterThan,
SpvOpUGreaterThan,
SpvOpFOrdGreaterThan,
SpvOpUndef);
fIntrinsicMap[SkString("greaterThanEqual")] = std::make_tuple(kSPIRV_IntrinsicKind,
SpvOpSGreaterThanEqual,
SpvOpUGreaterThanEqual,
SpvOpFOrdGreaterThanEqual,
SpvOpUndef);
// interpolateAt* not yet supported...
}
void SPIRVCodeGenerator::writeWord(int32_t word, SkWStream& out) {
#if SPIRV_DEBUG
out << "(" << word << ") ";
#else
out.write((const char*) &word, sizeof(word));
#endif
}
static bool is_float(const Context& context, const Type& type) {
if (type.kind() == Type::kVector_Kind) {
return is_float(context, type.componentType());
}
return type == *context.fFloat_Type || type == *context.fDouble_Type;
}
static bool is_signed(const Context& context, const Type& type) {
if (type.kind() == Type::kVector_Kind) {
return is_signed(context, type.componentType());
}
return type == *context.fInt_Type;
}
static bool is_unsigned(const Context& context, const Type& type) {
if (type.kind() == Type::kVector_Kind) {
return is_unsigned(context, type.componentType());
}
return type == *context.fUInt_Type;
}
static bool is_bool(const Context& context, const Type& type) {
if (type.kind() == Type::kVector_Kind) {
return is_bool(context, type.componentType());
}
return type == *context.fBool_Type;
}
static bool is_out(const Variable& var) {
return (var.fModifiers.fFlags & Modifiers::kOut_Flag) != 0;
}
#if SPIRV_DEBUG
static SkString opcode_text(SpvOp_ opCode) {
switch (opCode) {
case SpvOpNop:
return SkString("Nop");
case SpvOpUndef:
return SkString("Undef");
case SpvOpSourceContinued:
return SkString("SourceContinued");
case SpvOpSource:
return SkString("Source");
case SpvOpSourceExtension:
return SkString("SourceExtension");
case SpvOpName:
return SkString("Name");
case SpvOpMemberName:
return SkString("MemberName");
case SpvOpString:
return SkString("String");
case SpvOpLine:
return SkString("Line");
case SpvOpExtension:
return SkString("Extension");
case SpvOpExtInstImport:
return SkString("ExtInstImport");
case SpvOpExtInst:
return SkString("ExtInst");
case SpvOpMemoryModel:
return SkString("MemoryModel");
case SpvOpEntryPoint:
return SkString("EntryPoint");
case SpvOpExecutionMode:
return SkString("ExecutionMode");
case SpvOpCapability:
return SkString("Capability");
case SpvOpTypeVoid:
return SkString("TypeVoid");
case SpvOpTypeBool:
return SkString("TypeBool");
case SpvOpTypeInt:
return SkString("TypeInt");
case SpvOpTypeFloat:
return SkString("TypeFloat");
case SpvOpTypeVector:
return SkString("TypeVector");
case SpvOpTypeMatrix:
return SkString("TypeMatrix");
case SpvOpTypeImage:
return SkString("TypeImage");
case SpvOpTypeSampler:
return SkString("TypeSampler");
case SpvOpTypeSampledImage:
return SkString("TypeSampledImage");
case SpvOpTypeArray:
return SkString("TypeArray");
case SpvOpTypeRuntimeArray:
return SkString("TypeRuntimeArray");
case SpvOpTypeStruct:
return SkString("TypeStruct");
case SpvOpTypeOpaque:
return SkString("TypeOpaque");
case SpvOpTypePointer:
return SkString("TypePointer");
case SpvOpTypeFunction:
return SkString("TypeFunction");
case SpvOpTypeEvent:
return SkString("TypeEvent");
case SpvOpTypeDeviceEvent:
return SkString("TypeDeviceEvent");
case SpvOpTypeReserveId:
return SkString("TypeReserveId");
case SpvOpTypeQueue:
return SkString("TypeQueue");
case SpvOpTypePipe:
return SkString("TypePipe");
case SpvOpTypeForwardPointer:
return SkString("TypeForwardPointer");
case SpvOpConstantTrue:
return SkString("ConstantTrue");
case SpvOpConstantFalse:
return SkString("ConstantFalse");
case SpvOpConstant:
return SkString("Constant");
case SpvOpConstantComposite:
return SkString("ConstantComposite");
case SpvOpConstantSampler:
return SkString("ConstantSampler");
case SpvOpConstantNull:
return SkString("ConstantNull");
case SpvOpSpecConstantTrue:
return SkString("SpecConstantTrue");
case SpvOpSpecConstantFalse:
return SkString("SpecConstantFalse");
case SpvOpSpecConstant:
return SkString("SpecConstant");
case SpvOpSpecConstantComposite:
return SkString("SpecConstantComposite");
case SpvOpSpecConstantOp:
return SkString("SpecConstantOp");
case SpvOpFunction:
return SkString("Function");
case SpvOpFunctionParameter:
return SkString("FunctionParameter");
case SpvOpFunctionEnd:
return SkString("FunctionEnd");
case SpvOpFunctionCall:
return SkString("FunctionCall");
case SpvOpVariable:
return SkString("Variable");
case SpvOpImageTexelPointer:
return SkString("ImageTexelPointer");
case SpvOpLoad:
return SkString("Load");
case SpvOpStore:
return SkString("Store");
case SpvOpCopyMemory:
return SkString("CopyMemory");
case SpvOpCopyMemorySized:
return SkString("CopyMemorySized");
case SpvOpAccessChain:
return SkString("AccessChain");
case SpvOpInBoundsAccessChain:
return SkString("InBoundsAccessChain");
case SpvOpPtrAccessChain:
return SkString("PtrAccessChain");
case SpvOpArrayLength:
return SkString("ArrayLength");
case SpvOpGenericPtrMemSemantics:
return SkString("GenericPtrMemSemantics");
case SpvOpInBoundsPtrAccessChain:
return SkString("InBoundsPtrAccessChain");
case SpvOpDecorate:
return SkString("Decorate");
case SpvOpMemberDecorate:
return SkString("MemberDecorate");
case SpvOpDecorationGroup:
return SkString("DecorationGroup");
case SpvOpGroupDecorate:
return SkString("GroupDecorate");
case SpvOpGroupMemberDecorate:
return SkString("GroupMemberDecorate");
case SpvOpVectorExtractDynamic:
return SkString("VectorExtractDynamic");
case SpvOpVectorInsertDynamic:
return SkString("VectorInsertDynamic");
case SpvOpVectorShuffle:
return SkString("VectorShuffle");
case SpvOpCompositeConstruct:
return SkString("CompositeConstruct");
case SpvOpCompositeExtract:
return SkString("CompositeExtract");
case SpvOpCompositeInsert:
return SkString("CompositeInsert");
case SpvOpCopyObject:
return SkString("CopyObject");
case SpvOpTranspose:
return SkString("Transpose");
case SpvOpSampledImage:
return SkString("SampledImage");
case SpvOpImageSampleImplicitLod:
return SkString("ImageSampleImplicitLod");
case SpvOpImageSampleExplicitLod:
return SkString("ImageSampleExplicitLod");
case SpvOpImageSampleDrefImplicitLod:
return SkString("ImageSampleDrefImplicitLod");
case SpvOpImageSampleDrefExplicitLod:
return SkString("ImageSampleDrefExplicitLod");
case SpvOpImageSampleProjImplicitLod:
return SkString("ImageSampleProjImplicitLod");
case SpvOpImageSampleProjExplicitLod:
return SkString("ImageSampleProjExplicitLod");
case SpvOpImageSampleProjDrefImplicitLod:
return SkString("ImageSampleProjDrefImplicitLod");
case SpvOpImageSampleProjDrefExplicitLod:
return SkString("ImageSampleProjDrefExplicitLod");
case SpvOpImageFetch:
return SkString("ImageFetch");
case SpvOpImageGather:
return SkString("ImageGather");
case SpvOpImageDrefGather:
return SkString("ImageDrefGather");
case SpvOpImageRead:
return SkString("ImageRead");
case SpvOpImageWrite:
return SkString("ImageWrite");
case SpvOpImage:
return SkString("Image");
case SpvOpImageQueryFormat:
return SkString("ImageQueryFormat");
case SpvOpImageQueryOrder:
return SkString("ImageQueryOrder");
case SpvOpImageQuerySizeLod:
return SkString("ImageQuerySizeLod");
case SpvOpImageQuerySize:
return SkString("ImageQuerySize");
case SpvOpImageQueryLod:
return SkString("ImageQueryLod");
case SpvOpImageQueryLevels:
return SkString("ImageQueryLevels");
case SpvOpImageQuerySamples:
return SkString("ImageQuerySamples");
case SpvOpConvertFToU:
return SkString("ConvertFToU");
case SpvOpConvertFToS:
return SkString("ConvertFToS");
case SpvOpConvertSToF:
return SkString("ConvertSToF");
case SpvOpConvertUToF:
return SkString("ConvertUToF");
case SpvOpUConvert:
return SkString("UConvert");
case SpvOpSConvert:
return SkString("SConvert");
case SpvOpFConvert:
return SkString("FConvert");
case SpvOpQuantizeToF16:
return SkString("QuantizeToF16");
case SpvOpConvertPtrToU:
return SkString("ConvertPtrToU");
case SpvOpSatConvertSToU:
return SkString("SatConvertSToU");
case SpvOpSatConvertUToS:
return SkString("SatConvertUToS");
case SpvOpConvertUToPtr:
return SkString("ConvertUToPtr");
case SpvOpPtrCastToGeneric:
return SkString("PtrCastToGeneric");
case SpvOpGenericCastToPtr:
return SkString("GenericCastToPtr");
case SpvOpGenericCastToPtrExplicit:
return SkString("GenericCastToPtrExplicit");
case SpvOpBitcast:
return SkString("Bitcast");
case SpvOpSNegate:
return SkString("SNegate");
case SpvOpFNegate:
return SkString("FNegate");
case SpvOpIAdd:
return SkString("IAdd");
case SpvOpFAdd:
return SkString("FAdd");
case SpvOpISub:
return SkString("ISub");
case SpvOpFSub:
return SkString("FSub");
case SpvOpIMul:
return SkString("IMul");
case SpvOpFMul:
return SkString("FMul");
case SpvOpUDiv:
return SkString("UDiv");
case SpvOpSDiv:
return SkString("SDiv");
case SpvOpFDiv:
return SkString("FDiv");
case SpvOpUMod:
return SkString("UMod");
case SpvOpSRem:
return SkString("SRem");
case SpvOpSMod:
return SkString("SMod");
case SpvOpFRem:
return SkString("FRem");
case SpvOpFMod:
return SkString("FMod");
case SpvOpVectorTimesScalar:
return SkString("VectorTimesScalar");
case SpvOpMatrixTimesScalar:
return SkString("MatrixTimesScalar");
case SpvOpVectorTimesMatrix:
return SkString("VectorTimesMatrix");
case SpvOpMatrixTimesVector:
return SkString("MatrixTimesVector");
case SpvOpMatrixTimesMatrix:
return SkString("MatrixTimesMatrix");
case SpvOpOuterProduct:
return SkString("OuterProduct");
case SpvOpDot:
return SkString("Dot");
case SpvOpIAddCarry:
return SkString("IAddCarry");
case SpvOpISubBorrow:
return SkString("ISubBorrow");
case SpvOpUMulExtended:
return SkString("UMulExtended");
case SpvOpSMulExtended:
return SkString("SMulExtended");
case SpvOpAny:
return SkString("Any");
case SpvOpAll:
return SkString("All");
case SpvOpIsNan:
return SkString("IsNan");
case SpvOpIsInf:
return SkString("IsInf");
case SpvOpIsFinite:
return SkString("IsFinite");
case SpvOpIsNormal:
return SkString("IsNormal");
case SpvOpSignBitSet:
return SkString("SignBitSet");
case SpvOpLessOrGreater:
return SkString("LessOrGreater");
case SpvOpOrdered:
return SkString("Ordered");
case SpvOpUnordered:
return SkString("Unordered");
case SpvOpLogicalEqual:
return SkString("LogicalEqual");
case SpvOpLogicalNotEqual:
return SkString("LogicalNotEqual");
case SpvOpLogicalOr:
return SkString("LogicalOr");
case SpvOpLogicalAnd:
return SkString("LogicalAnd");
case SpvOpLogicalNot:
return SkString("LogicalNot");
case SpvOpSelect:
return SkString("Select");
case SpvOpIEqual:
return SkString("IEqual");
case SpvOpINotEqual:
return SkString("INotEqual");
case SpvOpUGreaterThan:
return SkString("UGreaterThan");
case SpvOpSGreaterThan:
return SkString("SGreaterThan");
case SpvOpUGreaterThanEqual:
return SkString("UGreaterThanEqual");
case SpvOpSGreaterThanEqual:
return SkString("SGreaterThanEqual");
case SpvOpULessThan:
return SkString("ULessThan");
case SpvOpSLessThan:
return SkString("SLessThan");
case SpvOpULessThanEqual:
return SkString("ULessThanEqual");
case SpvOpSLessThanEqual:
return SkString("SLessThanEqual");
case SpvOpFOrdEqual:
return SkString("FOrdEqual");
case SpvOpFUnordEqual:
return SkString("FUnordEqual");
case SpvOpFOrdNotEqual:
return SkString("FOrdNotEqual");
case SpvOpFUnordNotEqual:
return SkString("FUnordNotEqual");
case SpvOpFOrdLessThan:
return SkString("FOrdLessThan");
case SpvOpFUnordLessThan:
return SkString("FUnordLessThan");
case SpvOpFOrdGreaterThan:
return SkString("FOrdGreaterThan");
case SpvOpFUnordGreaterThan:
return SkString("FUnordGreaterThan");
case SpvOpFOrdLessThanEqual:
return SkString("FOrdLessThanEqual");
case SpvOpFUnordLessThanEqual:
return SkString("FUnordLessThanEqual");
case SpvOpFOrdGreaterThanEqual:
return SkString("FOrdGreaterThanEqual");
case SpvOpFUnordGreaterThanEqual:
return SkString("FUnordGreaterThanEqual");
case SpvOpShiftRightLogical:
return SkString("ShiftRightLogical");
case SpvOpShiftRightArithmetic:
return SkString("ShiftRightArithmetic");
case SpvOpShiftLeftLogical:
return SkString("ShiftLeftLogical");
case SpvOpBitwiseOr:
return SkString("BitwiseOr");
case SpvOpBitwiseXor:
return SkString("BitwiseXor");
case SpvOpBitwiseAnd:
return SkString("BitwiseAnd");
case SpvOpNot:
return SkString("Not");
case SpvOpBitFieldInsert:
return SkString("BitFieldInsert");
case SpvOpBitFieldSExtract:
return SkString("BitFieldSExtract");
case SpvOpBitFieldUExtract:
return SkString("BitFieldUExtract");
case SpvOpBitReverse:
return SkString("BitReverse");
case SpvOpBitCount:
return SkString("BitCount");
case SpvOpDPdx:
return SkString("DPdx");
case SpvOpDPdy:
return SkString("DPdy");
case SpvOpFwidth:
return SkString("Fwidth");
case SpvOpDPdxFine:
return SkString("DPdxFine");
case SpvOpDPdyFine:
return SkString("DPdyFine");
case SpvOpFwidthFine:
return SkString("FwidthFine");
case SpvOpDPdxCoarse:
return SkString("DPdxCoarse");
case SpvOpDPdyCoarse:
return SkString("DPdyCoarse");
case SpvOpFwidthCoarse:
return SkString("FwidthCoarse");
case SpvOpEmitVertex:
return SkString("EmitVertex");
case SpvOpEndPrimitive:
return SkString("EndPrimitive");
case SpvOpEmitStreamVertex:
return SkString("EmitStreamVertex");
case SpvOpEndStreamPrimitive:
return SkString("EndStreamPrimitive");
case SpvOpControlBarrier:
return SkString("ControlBarrier");
case SpvOpMemoryBarrier:
return SkString("MemoryBarrier");
case SpvOpAtomicLoad:
return SkString("AtomicLoad");
case SpvOpAtomicStore:
return SkString("AtomicStore");
case SpvOpAtomicExchange:
return SkString("AtomicExchange");
case SpvOpAtomicCompareExchange:
return SkString("AtomicCompareExchange");
case SpvOpAtomicCompareExchangeWeak:
return SkString("AtomicCompareExchangeWeak");
case SpvOpAtomicIIncrement:
return SkString("AtomicIIncrement");
case SpvOpAtomicIDecrement:
return SkString("AtomicIDecrement");
case SpvOpAtomicIAdd:
return SkString("AtomicIAdd");
case SpvOpAtomicISub:
return SkString("AtomicISub");
case SpvOpAtomicSMin:
return SkString("AtomicSMin");
case SpvOpAtomicUMin:
return SkString("AtomicUMin");
case SpvOpAtomicSMax:
return SkString("AtomicSMax");
case SpvOpAtomicUMax:
return SkString("AtomicUMax");
case SpvOpAtomicAnd:
return SkString("AtomicAnd");
case SpvOpAtomicOr:
return SkString("AtomicOr");
case SpvOpAtomicXor:
return SkString("AtomicXor");
case SpvOpPhi:
return SkString("Phi");
case SpvOpLoopMerge:
return SkString("LoopMerge");
case SpvOpSelectionMerge:
return SkString("SelectionMerge");
case SpvOpLabel:
return SkString("Label");
case SpvOpBranch:
return SkString("Branch");
case SpvOpBranchConditional:
return SkString("BranchConditional");
case SpvOpSwitch:
return SkString("Switch");
case SpvOpKill:
return SkString("Kill");
case SpvOpReturn:
return SkString("Return");
case SpvOpReturnValue:
return SkString("ReturnValue");
case SpvOpUnreachable:
return SkString("Unreachable");
case SpvOpLifetimeStart:
return SkString("LifetimeStart");
case SpvOpLifetimeStop:
return SkString("LifetimeStop");
case SpvOpGroupAsyncCopy:
return SkString("GroupAsyncCopy");
case SpvOpGroupWaitEvents:
return SkString("GroupWaitEvents");
case SpvOpGroupAll:
return SkString("GroupAll");
case SpvOpGroupAny:
return SkString("GroupAny");
case SpvOpGroupBroadcast:
return SkString("GroupBroadcast");
case SpvOpGroupIAdd:
return SkString("GroupIAdd");
case SpvOpGroupFAdd:
return SkString("GroupFAdd");
case SpvOpGroupFMin:
return SkString("GroupFMin");
case SpvOpGroupUMin:
return SkString("GroupUMin");
case SpvOpGroupSMin:
return SkString("GroupSMin");
case SpvOpGroupFMax:
return SkString("GroupFMax");
case SpvOpGroupUMax:
return SkString("GroupUMax");
case SpvOpGroupSMax:
return SkString("GroupSMax");
case SpvOpReadPipe:
return SkString("ReadPipe");
case SpvOpWritePipe:
return SkString("WritePipe");
case SpvOpReservedReadPipe:
return SkString("ReservedReadPipe");
case SpvOpReservedWritePipe:
return SkString("ReservedWritePipe");
case SpvOpReserveReadPipePackets:
return SkString("ReserveReadPipePackets");
case SpvOpReserveWritePipePackets:
return SkString("ReserveWritePipePackets");
case SpvOpCommitReadPipe:
return SkString("CommitReadPipe");
case SpvOpCommitWritePipe:
return SkString("CommitWritePipe");
case SpvOpIsValidReserveId:
return SkString("IsValidReserveId");
case SpvOpGetNumPipePackets:
return SkString("GetNumPipePackets");
case SpvOpGetMaxPipePackets:
return SkString("GetMaxPipePackets");
case SpvOpGroupReserveReadPipePackets:
return SkString("GroupReserveReadPipePackets");
case SpvOpGroupReserveWritePipePackets:
return SkString("GroupReserveWritePipePackets");
case SpvOpGroupCommitReadPipe:
return SkString("GroupCommitReadPipe");
case SpvOpGroupCommitWritePipe:
return SkString("GroupCommitWritePipe");
case SpvOpEnqueueMarker:
return SkString("EnqueueMarker");
case SpvOpEnqueueKernel:
return SkString("EnqueueKernel");
case SpvOpGetKernelNDrangeSubGroupCount:
return SkString("GetKernelNDrangeSubGroupCount");
case SpvOpGetKernelNDrangeMaxSubGroupSize:
return SkString("GetKernelNDrangeMaxSubGroupSize");
case SpvOpGetKernelWorkGroupSize:
return SkString("GetKernelWorkGroupSize");
case SpvOpGetKernelPreferredWorkGroupSizeMultiple:
return SkString("GetKernelPreferredWorkGroupSizeMultiple");
case SpvOpRetainEvent:
return SkString("RetainEvent");
case SpvOpReleaseEvent:
return SkString("ReleaseEvent");
case SpvOpCreateUserEvent:
return SkString("CreateUserEvent");
case SpvOpIsValidEvent:
return SkString("IsValidEvent");
case SpvOpSetUserEventStatus:
return SkString("SetUserEventStatus");
case SpvOpCaptureEventProfilingInfo:
return SkString("CaptureEventProfilingInfo");
case SpvOpGetDefaultQueue:
return SkString("GetDefaultQueue");
case SpvOpBuildNDRange:
return SkString("BuildNDRange");
case SpvOpImageSparseSampleImplicitLod:
return SkString("ImageSparseSampleImplicitLod");
case SpvOpImageSparseSampleExplicitLod:
return SkString("ImageSparseSampleExplicitLod");
case SpvOpImageSparseSampleDrefImplicitLod:
return SkString("ImageSparseSampleDrefImplicitLod");
case SpvOpImageSparseSampleDrefExplicitLod:
return SkString("ImageSparseSampleDrefExplicitLod");
case SpvOpImageSparseSampleProjImplicitLod:
return SkString("ImageSparseSampleProjImplicitLod");
case SpvOpImageSparseSampleProjExplicitLod:
return SkString("ImageSparseSampleProjExplicitLod");
case SpvOpImageSparseSampleProjDrefImplicitLod:
return SkString("ImageSparseSampleProjDrefImplicitLod");
case SpvOpImageSparseSampleProjDrefExplicitLod:
return SkString("ImageSparseSampleProjDrefExplicitLod");
case SpvOpImageSparseFetch:
return SkString("ImageSparseFetch");
case SpvOpImageSparseGather:
return SkString("ImageSparseGather");
case SpvOpImageSparseDrefGather:
return SkString("ImageSparseDrefGather");
case SpvOpImageSparseTexelsResident:
return SkString("ImageSparseTexelsResident");
case SpvOpNoLine:
return SkString("NoLine");
case SpvOpAtomicFlagTestAndSet:
return SkString("AtomicFlagTestAndSet");
case SpvOpAtomicFlagClear:
return SkString("AtomicFlagClear");
case SpvOpImageSparseRead:
return SkString("ImageSparseRead");
default:
ABORT("unsupported SPIR-V op");
}
}
#endif
void SPIRVCodeGenerator::writeOpCode(SpvOp_ opCode, int length, SkWStream& out) {
ASSERT(opCode != SpvOpUndef);
switch (opCode) {
case SpvOpReturn: // fall through
case SpvOpReturnValue: // fall through
case SpvOpKill: // fall through
case SpvOpBranch: // fall through
case SpvOpBranchConditional:
ASSERT(fCurrentBlock);
fCurrentBlock = 0;
break;
case SpvOpConstant: // fall through
case SpvOpConstantTrue: // fall through
case SpvOpConstantFalse: // fall through
case SpvOpConstantComposite: // fall through
case SpvOpTypeVoid: // fall through
case SpvOpTypeInt: // fall through
case SpvOpTypeFloat: // fall through
case SpvOpTypeBool: // fall through
case SpvOpTypeVector: // fall through
case SpvOpTypeMatrix: // fall through
case SpvOpTypeArray: // fall through
case SpvOpTypePointer: // fall through
case SpvOpTypeFunction: // fall through
case SpvOpTypeRuntimeArray: // fall through
case SpvOpTypeStruct: // fall through
case SpvOpTypeImage: // fall through
case SpvOpTypeSampledImage: // fall through
case SpvOpVariable: // fall through
case SpvOpFunction: // fall through
case SpvOpFunctionParameter: // fall through
case SpvOpFunctionEnd: // fall through
case SpvOpExecutionMode: // fall through
case SpvOpMemoryModel: // fall through
case SpvOpCapability: // fall through
case SpvOpExtInstImport: // fall through
case SpvOpEntryPoint: // fall through
case SpvOpSource: // fall through
case SpvOpSourceExtension: // fall through
case SpvOpName: // fall through
case SpvOpMemberName: // fall through
case SpvOpDecorate: // fall through
case SpvOpMemberDecorate:
break;
default:
ASSERT(fCurrentBlock);
}
#if SPIRV_DEBUG
out << std::endl << opcode_text(opCode) << " ";
#else
this->writeWord((length << 16) | opCode, out);
#endif
}
void SPIRVCodeGenerator::writeLabel(SpvId label, SkWStream& out) {
fCurrentBlock = label;
this->writeInstruction(SpvOpLabel, label, out);
}
void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, SkWStream& out) {
this->writeOpCode(opCode, 1, out);
}
void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, int32_t word1, SkWStream& out) {
this->writeOpCode(opCode, 2, out);
this->writeWord(word1, out);
}
void SPIRVCodeGenerator::writeString(const char* string, SkWStream& out) {
size_t length = strlen(string);
out.writeText(string);
switch (length % 4) {
case 1:
out.write8(0);
// fall through
case 2:
out.write8(0);
// fall through
case 3:
out.write8(0);
break;
default:
this->writeWord(0, out);
}
}
void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, const char* string, SkWStream& out) {
int32_t length = (int32_t) strlen(string);
this->writeOpCode(opCode, 1 + (length + 4) / 4, out);
this->writeString(string, out);
}
void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, int32_t word1, const char* string,
SkWStream& out) {
int32_t length = (int32_t) strlen(string);
this->writeOpCode(opCode, 2 + (length + 4) / 4, out);
this->writeWord(word1, out);
this->writeString(string, out);
}
void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, int32_t word1, int32_t word2,
const char* string, SkWStream& out) {
int32_t length = (int32_t) strlen(string);
this->writeOpCode(opCode, 3 + (length + 4) / 4, out);
this->writeWord(word1, out);
this->writeWord(word2, out);
this->writeString(string, out);
}
void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, int32_t word1, int32_t word2,
SkWStream& out) {
this->writeOpCode(opCode, 3, out);
this->writeWord(word1, out);
this->writeWord(word2, out);
}
void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, int32_t word1, int32_t word2,
int32_t word3, SkWStream& out) {
this->writeOpCode(opCode, 4, out);
this->writeWord(word1, out);
this->writeWord(word2, out);
this->writeWord(word3, out);
}
void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, int32_t word1, int32_t word2,
int32_t word3, int32_t word4, SkWStream& out) {
this->writeOpCode(opCode, 5, out);
this->writeWord(word1, out);
this->writeWord(word2, out);
this->writeWord(word3, out);
this->writeWord(word4, out);
}
void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, int32_t word1, int32_t word2,
int32_t word3, int32_t word4, int32_t word5,
SkWStream& out) {
this->writeOpCode(opCode, 6, out);
this->writeWord(word1, out);
this->writeWord(word2, out);
this->writeWord(word3, out);
this->writeWord(word4, out);
this->writeWord(word5, out);
}
void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, int32_t word1, int32_t word2,
int32_t word3, int32_t word4, int32_t word5,
int32_t word6, SkWStream& out) {
this->writeOpCode(opCode, 7, out);
this->writeWord(word1, out);
this->writeWord(word2, out);
this->writeWord(word3, out);
this->writeWord(word4, out);
this->writeWord(word5, out);
this->writeWord(word6, out);
}
void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, int32_t word1, int32_t word2,
int32_t word3, int32_t word4, int32_t word5,
int32_t word6, int32_t word7, SkWStream& out) {
this->writeOpCode(opCode, 8, out);
this->writeWord(word1, out);
this->writeWord(word2, out);
this->writeWord(word3, out);
this->writeWord(word4, out);
this->writeWord(word5, out);
this->writeWord(word6, out);
this->writeWord(word7, out);
}
void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, int32_t word1, int32_t word2,
int32_t word3, int32_t word4, int32_t word5,
int32_t word6, int32_t word7, int32_t word8,
SkWStream& out) {
this->writeOpCode(opCode, 9, out);
this->writeWord(word1, out);
this->writeWord(word2, out);
this->writeWord(word3, out);
this->writeWord(word4, out);
this->writeWord(word5, out);
this->writeWord(word6, out);
this->writeWord(word7, out);
this->writeWord(word8, out);
}
void SPIRVCodeGenerator::writeCapabilities(SkWStream& out) {
for (uint64_t i = 0, bit = 1; i <= kLast_Capability; i++, bit <<= 1) {
if (fCapabilities & bit) {
this->writeInstruction(SpvOpCapability, (SpvId) i, out);
}
}
}
SpvId SPIRVCodeGenerator::nextId() {
return fIdCount++;
}
void SPIRVCodeGenerator::writeStruct(const Type& type, SpvId resultId) {
this->writeInstruction(SpvOpName, resultId, type.name().c_str(), fNameBuffer);
// go ahead and write all of the field types, so we don't inadvertently write them while we're
// in the middle of writing the struct instruction
std::vector<SpvId> types;
for (const auto& f : type.fields()) {
types.push_back(this->getType(*f.fType));
}
this->writeOpCode(SpvOpTypeStruct, 2 + (int32_t) types.size(), fConstantBuffer);
this->writeWord(resultId, fConstantBuffer);
for (SpvId id : types) {
this->writeWord(id, fConstantBuffer);
}
size_t offset = 0;
for (int32_t i = 0; i < (int32_t) type.fields().size(); i++) {
size_t size = type.fields()[i].fType->size();
size_t alignment = type.fields()[i].fType->alignment();
size_t mod = offset % alignment;
if (mod != 0) {
offset += alignment - mod;
}
this->writeInstruction(SpvOpMemberName, resultId, i, type.fields()[i].fName.c_str(),
fNameBuffer);
this->writeLayout(type.fields()[i].fModifiers.fLayout, resultId, i);
if (type.fields()[i].fModifiers.fLayout.fBuiltin < 0) {
this->writeInstruction(SpvOpMemberDecorate, resultId, (SpvId) i, SpvDecorationOffset,
(SpvId) offset, fDecorationBuffer);
}
if (type.fields()[i].fType->kind() == Type::kMatrix_Kind) {
this->writeInstruction(SpvOpMemberDecorate, resultId, i, SpvDecorationColMajor,
fDecorationBuffer);
this->writeInstruction(SpvOpMemberDecorate, resultId, i, SpvDecorationMatrixStride,
(SpvId) type.fields()[i].fType->stride(), fDecorationBuffer);
}
offset += size;
Type::Kind kind = type.fields()[i].fType->kind();
if ((kind == Type::kArray_Kind || kind == Type::kStruct_Kind) && offset % alignment != 0) {
offset += alignment - offset % alignment;
}
}
}
SpvId SPIRVCodeGenerator::getType(const Type& type) {
auto entry = fTypeMap.find(type.name());
if (entry == fTypeMap.end()) {
SpvId result = this->nextId();
switch (type.kind()) {
case Type::kScalar_Kind:
if (type == *fContext.fBool_Type) {
this->writeInstruction(SpvOpTypeBool, result, fConstantBuffer);
} else if (type == *fContext.fInt_Type) {
this->writeInstruction(SpvOpTypeInt, result, 32, 1, fConstantBuffer);
} else if (type == *fContext.fUInt_Type) {
this->writeInstruction(SpvOpTypeInt, result, 32, 0, fConstantBuffer);
} else if (type == *fContext.fFloat_Type) {
this->writeInstruction(SpvOpTypeFloat, result, 32, fConstantBuffer);
} else if (type == *fContext.fDouble_Type) {
this->writeInstruction(SpvOpTypeFloat, result, 64, fConstantBuffer);
} else {
ASSERT(false);
}
break;
case Type::kVector_Kind:
this->writeInstruction(SpvOpTypeVector, result,
this->getType(type.componentType()),
type.columns(), fConstantBuffer);
break;
case Type::kMatrix_Kind:
this->writeInstruction(SpvOpTypeMatrix, result,
this->getType(index_type(fContext, type)),
type.columns(), fConstantBuffer);
break;
case Type::kStruct_Kind:
this->writeStruct(type, result);
break;
case Type::kArray_Kind: {
if (type.columns() > 0) {
IntLiteral count(fContext, Position(), type.columns());
this->writeInstruction(SpvOpTypeArray, result,
this->getType(type.componentType()),
this->writeIntLiteral(count), fConstantBuffer);
this->writeInstruction(SpvOpDecorate, result, SpvDecorationArrayStride,
(int32_t) type.stride(), fDecorationBuffer);
} else {
ABORT("runtime-sized arrays are not yet supported");
this->writeInstruction(SpvOpTypeRuntimeArray, result,
this->getType(type.componentType()), fConstantBuffer);
}
break;
}
case Type::kSampler_Kind: {
SpvId image = this->nextId();
this->writeInstruction(SpvOpTypeImage, image, this->getType(*fContext.fFloat_Type),
type.dimensions(), type.isDepth(), type.isArrayed(),
type.isMultisampled(), type.isSampled(),
SpvImageFormatUnknown, fConstantBuffer);
this->writeInstruction(SpvOpTypeSampledImage, result, image, fConstantBuffer);
break;
}
default:
if (type == *fContext.fVoid_Type) {
this->writeInstruction(SpvOpTypeVoid, result, fConstantBuffer);
} else {
ABORT("invalid type: %s", type.description().c_str());
}
}
fTypeMap[type.name()] = result;
return result;
}
return entry->second;
}
SpvId SPIRVCodeGenerator::getFunctionType(const FunctionDeclaration& function) {
SkString key = function.fReturnType.description() + "(";
SkString separator;
for (size_t i = 0; i < function.fParameters.size(); i++) {
key += separator;
separator = ", ";
key += function.fParameters[i]->fType.description();
}
key += ")";
auto entry = fTypeMap.find(key);
if (entry == fTypeMap.end()) {
SpvId result = this->nextId();
int32_t length = 3 + (int32_t) function.fParameters.size();
SpvId returnType = this->getType(function.fReturnType);
std::vector<SpvId> parameterTypes;
for (size_t i = 0; i < function.fParameters.size(); i++) {
// glslang seems to treat all function arguments as pointers whether they need to be or
// not. I was initially puzzled by this until I ran bizarre failures with certain
// patterns of function calls and control constructs, as exemplified by this minimal
// failure case:
//
// void sphere(float x) {
// }
//
// void map() {
// sphere(1.0);
// }
//
// void main() {
// for (int i = 0; i < 1; i++) {
// map();
// }
// }
//
// As of this writing, compiling this in the "obvious" way (with sphere taking a float)
// crashes. Making it take a float* and storing the argument in a temporary variable,
// as glslang does, fixes it. It's entirely possible I simply missed whichever part of
// the spec makes this make sense.
// if (is_out(function->fParameters[i])) {
parameterTypes.push_back(this->getPointerType(function.fParameters[i]->fType,
SpvStorageClassFunction));
// } else {
// parameterTypes.push_back(this->getType(function.fParameters[i]->fType));
// }
}
this->writeOpCode(SpvOpTypeFunction, length, fConstantBuffer);
this->writeWord(result, fConstantBuffer);
this->writeWord(returnType, fConstantBuffer);
for (SpvId id : parameterTypes) {
this->writeWord(id, fConstantBuffer);
}
fTypeMap[key] = result;
return result;
}
return entry->second;
}
SpvId SPIRVCodeGenerator::getPointerType(const Type& type,
SpvStorageClass_ storageClass) {
SkString key = type.description() + "*" + to_string(storageClass);
auto entry = fTypeMap.find(key);
if (entry == fTypeMap.end()) {
SpvId result = this->nextId();
this->writeInstruction(SpvOpTypePointer, result, storageClass,
this->getType(type), fConstantBuffer);
fTypeMap[key] = result;
return result;
}
return entry->second;
}
SpvId SPIRVCodeGenerator::writeExpression(const Expression& expr, SkWStream& out) {
switch (expr.fKind) {
case Expression::kBinary_Kind:
return this->writeBinaryExpression((BinaryExpression&) expr, out);
case Expression::kBoolLiteral_Kind:
return this->writeBoolLiteral((BoolLiteral&) expr);
case Expression::kConstructor_Kind:
return this->writeConstructor((Constructor&) expr, out);
case Expression::kIntLiteral_Kind:
return this->writeIntLiteral((IntLiteral&) expr);
case Expression::kFieldAccess_Kind:
return this->writeFieldAccess(((FieldAccess&) expr), out);
case Expression::kFloatLiteral_Kind:
return this->writeFloatLiteral(((FloatLiteral&) expr));
case Expression::kFunctionCall_Kind:
return this->writeFunctionCall((FunctionCall&) expr, out);
case Expression::kPrefix_Kind:
return this->writePrefixExpression((PrefixExpression&) expr, out);
case Expression::kPostfix_Kind:
return this->writePostfixExpression((PostfixExpression&) expr, out);
case Expression::kSwizzle_Kind:
return this->writeSwizzle((Swizzle&) expr, out);
case Expression::kVariableReference_Kind:
return this->writeVariableReference((VariableReference&) expr, out);
case Expression::kTernary_Kind:
return this->writeTernaryExpression((TernaryExpression&) expr, out);
case Expression::kIndex_Kind:
return this->writeIndexExpression((IndexExpression&) expr, out);
default:
ABORT("unsupported expression: %s", expr.description().c_str());
}
return -1;
}
SpvId SPIRVCodeGenerator::writeIntrinsicCall(const FunctionCall& c, SkWStream& out) {
auto intrinsic = fIntrinsicMap.find(c.fFunction.fName);
ASSERT(intrinsic != fIntrinsicMap.end());
const Type& type = c.fArguments[0]->fType;
int32_t intrinsicId;
if (std::get<0>(intrinsic->second) == kSpecial_IntrinsicKind || is_float(fContext, type)) {
intrinsicId = std::get<1>(intrinsic->second);
} else if (is_signed(fContext, type)) {
intrinsicId = std::get<2>(intrinsic->second);
} else if (is_unsigned(fContext, type)) {
intrinsicId = std::get<3>(intrinsic->second);
} else if (is_bool(fContext, type)) {
intrinsicId = std::get<4>(intrinsic->second);
} else {
ABORT("invalid call %s, cannot operate on '%s'", c.description().c_str(),
type.description().c_str());
}
switch (std::get<0>(intrinsic->second)) {
case kGLSL_STD_450_IntrinsicKind: {
SpvId result = this->nextId();
std::vector<SpvId> arguments;
for (size_t i = 0; i < c.fArguments.size(); i++) {
arguments.push_back(this->writeExpression(*c.fArguments[i], out));
}
this->writeOpCode(SpvOpExtInst, 5 + (int32_t) arguments.size(), out);
this->writeWord(this->getType(c.fType), out);
this->writeWord(result, out);
this->writeWord(fGLSLExtendedInstructions, out);
this->writeWord(intrinsicId, out);
for (SpvId id : arguments) {
this->writeWord(id, out);
}
return result;
}
case kSPIRV_IntrinsicKind: {
SpvId result = this->nextId();
std::vector<SpvId> arguments;
for (size_t i = 0; i < c.fArguments.size(); i++) {
arguments.push_back(this->writeExpression(*c.fArguments[i], out));
}
this->writeOpCode((SpvOp_) intrinsicId, 3 + (int32_t) arguments.size(), out);
this->writeWord(this->getType(c.fType), out);
this->writeWord(result, out);
for (SpvId id : arguments) {
this->writeWord(id, out);
}
return result;
}
case kSpecial_IntrinsicKind:
return this->writeSpecialIntrinsic(c, (SpecialIntrinsic) intrinsicId, out);
default:
ABORT("unsupported intrinsic kind");
}
}
SpvId SPIRVCodeGenerator::writeSpecialIntrinsic(const FunctionCall& c, SpecialIntrinsic kind,
SkWStream& out) {
SpvId result = this->nextId();
switch (kind) {
case kAtan_SpecialIntrinsic: {
std::vector<SpvId> arguments;
for (size_t i = 0; i < c.fArguments.size(); i++) {
arguments.push_back(this->writeExpression(*c.fArguments[i], out));
}
this->writeOpCode(SpvOpExtInst, 5 + (int32_t) arguments.size(), out);
this->writeWord(this->getType(c.fType), out);
this->writeWord(result, out);
this->writeWord(fGLSLExtendedInstructions, out);
this->writeWord(arguments.size() == 2 ? GLSLstd450Atan2 : GLSLstd450Atan, out);
for (SpvId id : arguments) {
this->writeWord(id, out);
}
return result;
}
case kTexture_SpecialIntrinsic: {
SpvId type = this->getType(c.fType);
SpvId sampler = this->writeExpression(*c.fArguments[0], out);
SpvId uv = this->writeExpression(*c.fArguments[1], out);
if (c.fArguments.size() == 3) {
this->writeInstruction(SpvOpImageSampleImplicitLod, type, result, sampler, uv,
SpvImageOperandsBiasMask,
this->writeExpression(*c.fArguments[2], out),
out);
} else {
ASSERT(c.fArguments.size() == 2);
this->writeInstruction(SpvOpImageSampleImplicitLod, type, result, sampler, uv, out);
}
break;
}
case kTextureProj_SpecialIntrinsic: {
SpvId type = this->getType(c.fType);
SpvId sampler = this->writeExpression(*c.fArguments[0], out);
SpvId uv = this->writeExpression(*c.fArguments[1], out);
if (c.fArguments.size() == 3) {
this->writeInstruction(SpvOpImageSampleProjImplicitLod, type, result, sampler, uv,
SpvImageOperandsBiasMask,
this->writeExpression(*c.fArguments[2], out),
out);
} else {
ASSERT(c.fArguments.size() == 2);
this->writeInstruction(SpvOpImageSampleProjImplicitLod, type, result, sampler, uv,
out);
}
break;
}
case kTexture2D_SpecialIntrinsic: {
SpvId img = this->writeExpression(*c.fArguments[0], out);
SpvId coords = this->writeExpression(*c.fArguments[1], out);
this->writeInstruction(SpvOpImageSampleImplicitLod,
this->getType(c.fType),
result,
img,
coords,
out);
break;
}
}
return result;
}
SpvId SPIRVCodeGenerator::writeFunctionCall(const FunctionCall& c, SkWStream& out) {
const auto& entry = fFunctionMap.find(&c.fFunction);
if (entry == fFunctionMap.end()) {
return this->writeIntrinsicCall(c, out);
}
// stores (variable, type, lvalue) pairs to extract and save after the function call is complete
std::vector<std::tuple<SpvId, SpvId, std::unique_ptr<LValue>>> lvalues;
std::vector<SpvId> arguments;
for (size_t i = 0; i < c.fArguments.size(); i++) {
// id of temporary variable that we will use to hold this argument, or 0 if it is being
// passed directly
SpvId tmpVar;
// if we need a temporary var to store this argument, this is the value to store in the var
SpvId tmpValueId;
if (is_out(*c.fFunction.fParameters[i])) {
std::unique_ptr<LValue> lv = this->getLValue(*c.fArguments[i], out);
SpvId ptr = lv->getPointer();
if (ptr) {
arguments.push_back(ptr);
continue;
} else {
// lvalue cannot simply be read and written via a pointer (e.g. a swizzle). Need to
// copy it into a temp, call the function, read the value out of the temp, and then
// update the lvalue.
tmpValueId = lv->load(out);
tmpVar = this->nextId();
lvalues.push_back(std::make_tuple(tmpVar, this->getType(c.fArguments[i]->fType),
std::move(lv)));
}
} else {
// see getFunctionType for an explanation of why we're always using pointer parameters
tmpValueId = this->writeExpression(*c.fArguments[i], out);
tmpVar = this->nextId();
}
this->writeInstruction(SpvOpVariable,
this->getPointerType(c.fArguments[i]->fType,
SpvStorageClassFunction),
tmpVar,
SpvStorageClassFunction,
fVariableBuffer);
this->writeInstruction(SpvOpStore, tmpVar, tmpValueId, out);
arguments.push_back(tmpVar);
}
SpvId result = this->nextId();
this->writeOpCode(SpvOpFunctionCall, 4 + (int32_t) c.fArguments.size(), out);
this->writeWord(this->getType(c.fType), out);
this->writeWord(result, out);
this->writeWord(entry->second, out);
for (SpvId id : arguments) {
this->writeWord(id, out);
}
// now that the call is complete, we may need to update some lvalues with the new values of out
// arguments
for (const auto& tuple : lvalues) {
SpvId load = this->nextId();
this->writeInstruction(SpvOpLoad, std::get<1>(tuple), load, std::get<0>(tuple), out);
std::get<2>(tuple)->store(load, out);
}
return result;
}
SpvId SPIRVCodeGenerator::writeConstantVector(const Constructor& c) {
ASSERT(c.fType.kind() == Type::kVector_Kind && c.isConstant());
SpvId result = this->nextId();
std::vector<SpvId> arguments;
for (size_t i = 0; i < c.fArguments.size(); i++) {
arguments.push_back(this->writeExpression(*c.fArguments[i], fConstantBuffer));
}
SpvId type = this->getType(c.fType);
if (c.fArguments.size() == 1) {
// with a single argument, a vector will have all of its entries equal to the argument
this->writeOpCode(SpvOpConstantComposite, 3 + c.fType.columns(), fConstantBuffer);
this->writeWord(type, fConstantBuffer);
this->writeWord(result, fConstantBuffer);
for (int i = 0; i < c.fType.columns(); i++) {
this->writeWord(arguments[0], fConstantBuffer);
}
} else {
this->writeOpCode(SpvOpConstantComposite, 3 + (int32_t) c.fArguments.size(),
fConstantBuffer);
this->writeWord(type, fConstantBuffer);
this->writeWord(result, fConstantBuffer);
for (SpvId id : arguments) {
this->writeWord(id, fConstantBuffer);
}
}
return result;
}
SpvId SPIRVCodeGenerator::writeFloatConstructor(const Constructor& c, SkWStream& out) {
ASSERT(c.fType == *fContext.fFloat_Type);
ASSERT(c.fArguments.size() == 1);
ASSERT(c.fArguments[0]->fType.isNumber());
SpvId result = this->nextId();
SpvId parameter = this->writeExpression(*c.fArguments[0], out);
if (c.fArguments[0]->fType == *fContext.fInt_Type) {
this->writeInstruction(SpvOpConvertSToF, this->getType(c.fType), result, parameter,
out);
} else if (c.fArguments[0]->fType == *fContext.fUInt_Type) {
this->writeInstruction(SpvOpConvertUToF, this->getType(c.fType), result, parameter,
out);
} else if (c.fArguments[0]->fType == *fContext.fFloat_Type) {
return parameter;
}
return result;
}
SpvId SPIRVCodeGenerator::writeIntConstructor(const Constructor& c, SkWStream& out) {
ASSERT(c.fType == *fContext.fInt_Type);
ASSERT(c.fArguments.size() == 1);
ASSERT(c.fArguments[0]->fType.isNumber());
SpvId result = this->nextId();
SpvId parameter = this->writeExpression(*c.fArguments[0], out);
if (c.fArguments[0]->fType == *fContext.fFloat_Type) {
this->writeInstruction(SpvOpConvertFToS, this->getType(c.fType), result, parameter,
out);
} else if (c.fArguments[0]->fType == *fContext.fUInt_Type) {
this->writeInstruction(SpvOpSatConvertUToS, this->getType(c.fType), result, parameter,
out);
} else if (c.fArguments[0]->fType == *fContext.fInt_Type) {
return parameter;
}
return result;
}
SpvId SPIRVCodeGenerator::writeMatrixConstructor(const Constructor& c, SkWStream& out) {
ASSERT(c.fType.kind() == Type::kMatrix_Kind);
// go ahead and write the arguments so we don't try to write new instructions in the middle of
// an instruction
std::vector<SpvId> arguments;
for (size_t i = 0; i < c.fArguments.size(); i++) {
arguments.push_back(this->writeExpression(*c.fArguments[i], out));
}
SpvId result = this->nextId();
int rows = c.fType.rows();
int columns = c.fType.columns();
// FIXME this won't work to create a matrix from another matrix
if (arguments.size() == 1) {
// with a single argument, a matrix will have all of its diagonal entries equal to the
// argument and its other values equal to zero
// FIXME this won't work for int matrices
FloatLiteral zero(fContext, Position(), 0);
SpvId zeroId = this->writeFloatLiteral(zero);
std::vector<SpvId> columnIds;
for (int column = 0; column < columns; column++) {
this->writeOpCode(SpvOpCompositeConstruct, 3 + c.fType.rows(),
out);
this->writeWord(this->getType(c.fType.componentType().toCompound(fContext, rows, 1)),
out);
SpvId columnId = this->nextId();
this->writeWord(columnId, out);
columnIds.push_back(columnId);
for (int row = 0; row < c.fType.columns(); row++) {
this->writeWord(row == column ? arguments[0] : zeroId, out);
}
}
this->writeOpCode(SpvOpCompositeConstruct, 3 + columns,
out);
this->writeWord(this->getType(c.fType), out);
this->writeWord(result, out);
for (SpvId id : columnIds) {
this->writeWord(id, out);
}
} else {
std::vector<SpvId> columnIds;
int currentCount = 0;
for (size_t i = 0; i < arguments.size(); i++) {
if (c.fArguments[i]->fType.kind() == Type::kVector_Kind) {
ASSERT(currentCount == 0);
columnIds.push_back(arguments[i]);
currentCount = 0;
} else {
ASSERT(c.fArguments[i]->fType.kind() == Type::kScalar_Kind);
if (currentCount == 0) {
this->writeOpCode(SpvOpCompositeConstruct, 3 + c.fType.rows(), out);
this->writeWord(this->getType(c.fType.componentType().toCompound(fContext, rows,
1)),
out);
SpvId id = this->nextId();
this->writeWord(id, out);
columnIds.push_back(id);
}
this->writeWord(arguments[i], out);
currentCount = (currentCount + 1) % rows;
}
}
ASSERT(columnIds.size() == (size_t) columns);
this->writeOpCode(SpvOpCompositeConstruct, 3 + columns, out);
this->writeWord(this->getType(c.fType), out);
this->writeWord(result, out);
for (SpvId id : columnIds) {
this->writeWord(id, out);
}
}
return result;
}
SpvId SPIRVCodeGenerator::writeVectorConstructor(const Constructor& c, SkWStream& out) {
ASSERT(c.fType.kind() == Type::kVector_Kind);
if (c.isConstant()) {
return this->writeConstantVector(c);
}
// go ahead and write the arguments so we don't try to write new instructions in the middle of
// an instruction
std::vector<SpvId> arguments;
for (size_t i = 0; i < c.fArguments.size(); i++) {
arguments.push_back(this->writeExpression(*c.fArguments[i], out));
}
SpvId result = this->nextId();
if (arguments.size() == 1 && c.fArguments[0]->fType.kind() == Type::kScalar_Kind) {
this->writeOpCode(SpvOpCompositeConstruct, 3 + c.fType.columns(), out);
this->writeWord(this->getType(c.fType), out);
this->writeWord(result, out);
for (int i = 0; i < c.fType.columns(); i++) {
this->writeWord(arguments[0], out);
}
} else {
this->writeOpCode(SpvOpCompositeConstruct, 3 + (int32_t) c.fArguments.size(), out);
this->writeWord(this->getType(c.fType), out);
this->writeWord(result, out);
for (SpvId id : arguments) {
this->writeWord(id, out);
}
}
return result;
}
SpvId SPIRVCodeGenerator::writeConstructor(const Constructor& c, SkWStream& out) {
if (c.fType == *fContext.fFloat_Type) {
return this->writeFloatConstructor(c, out);
} else if (c.fType == *fContext.fInt_Type) {
return this->writeIntConstructor(c, out);
}
switch (c.fType.kind()) {
case Type::kVector_Kind:
return this->writeVectorConstructor(c, out);
case Type::kMatrix_Kind:
return this->writeMatrixConstructor(c, out);
default:
ABORT("unsupported constructor: %s", c.description().c_str());
}
}
SpvStorageClass_ get_storage_class(const Modifiers& modifiers) {
if (modifiers.fFlags & Modifiers::kIn_Flag) {
return SpvStorageClassInput;
} else if (modifiers.fFlags & Modifiers::kOut_Flag) {
return SpvStorageClassOutput;
} else if (modifiers.fFlags & Modifiers::kUniform_Flag) {
return SpvStorageClassUniform;
} else {
return SpvStorageClassFunction;
}
}
SpvStorageClass_ get_storage_class(const Expression& expr) {
switch (expr.fKind) {
case Expression::kVariableReference_Kind:
return get_storage_class(((VariableReference&) expr).fVariable.fModifiers);
case Expression::kFieldAccess_Kind:
return get_storage_class(*((FieldAccess&) expr).fBase);
case Expression::kIndex_Kind:
return get_storage_class(*((IndexExpression&) expr).fBase);
default:
return SpvStorageClassFunction;
}
}
std::vector<SpvId> SPIRVCodeGenerator::getAccessChain(const Expression& expr, SkWStream& out) {
std::vector<SpvId> chain;
switch (expr.fKind) {
case Expression::kIndex_Kind: {
IndexExpression& indexExpr = (IndexExpression&) expr;
chain = this->getAccessChain(*indexExpr.fBase, out);
chain.push_back(this->writeExpression(*indexExpr.fIndex, out));
break;
}
case Expression::kFieldAccess_Kind: {
FieldAccess& fieldExpr = (FieldAccess&) expr;
chain = this->getAccessChain(*fieldExpr.fBase, out);
IntLiteral index(fContext, Position(), fieldExpr.fFieldIndex);
chain.push_back(this->writeIntLiteral(index));
break;
}
default:
chain.push_back(this->getLValue(expr, out)->getPointer());
}
return chain;
}
class PointerLValue : public SPIRVCodeGenerator::LValue {
public:
PointerLValue(SPIRVCodeGenerator& gen, SpvId pointer, SpvId type)
: fGen(gen)
, fPointer(pointer)
, fType(type) {}
virtual SpvId getPointer() override {
return fPointer;
}
virtual SpvId load(SkWStream& out) override {
SpvId result = fGen.nextId();
fGen.writeInstruction(SpvOpLoad, fType, result, fPointer, out);
return result;
}
virtual void store(SpvId value, SkWStream& out) override {
fGen.writeInstruction(SpvOpStore, fPointer, value, out);
}
private:
SPIRVCodeGenerator& fGen;
const SpvId fPointer;
const SpvId fType;
};
class SwizzleLValue : public SPIRVCodeGenerator::LValue {
public:
SwizzleLValue(SPIRVCodeGenerator& gen, SpvId vecPointer, const std::vector<int>& components,
const Type& baseType, const Type& swizzleType)
: fGen(gen)
, fVecPointer(vecPointer)
, fComponents(components)
, fBaseType(baseType)
, fSwizzleType(swizzleType) {}
virtual SpvId getPointer() override {
return 0;
}
virtual SpvId load(SkWStream& out) override {
SpvId base = fGen.nextId();
fGen.writeInstruction(SpvOpLoad, fGen.getType(fBaseType), base, fVecPointer, out);
SpvId result = fGen.nextId();
fGen.writeOpCode(SpvOpVectorShuffle, 5 + (int32_t) fComponents.size(), out);
fGen.writeWord(fGen.getType(fSwizzleType), out);
fGen.writeWord(result, out);
fGen.writeWord(base, out);
fGen.writeWord(base, out);
for (int component : fComponents) {
fGen.writeWord(component, out);
}
return result;
}
virtual void store(SpvId value, SkWStream& out) override {
// use OpVectorShuffle to mix and match the vector components. We effectively create
// a virtual vector out of the concatenation of the left and right vectors, and then
// select components from this virtual vector to make the result vector. For
// instance, given:
// vec3 L = ...;
// vec3 R = ...;
// L.xz = R.xy;
// we end up with the virtual vector (L.x, L.y, L.z, R.x, R.y, R.z). Then we want
// our result vector to look like (R.x, L.y, R.y), so we need to select indices
// (3, 1, 4).
SpvId base = fGen.nextId();
fGen.writeInstruction(SpvOpLoad, fGen.getType(fBaseType), base, fVecPointer, out);
SpvId shuffle = fGen.nextId();
fGen.writeOpCode(SpvOpVectorShuffle, 5 + fBaseType.columns(), out);
fGen.writeWord(fGen.getType(fBaseType), out);
fGen.writeWord(shuffle, out);
fGen.writeWord(base, out);
fGen.writeWord(value, out);
for (int i = 0; i < fBaseType.columns(); i++) {
// current offset into the virtual vector, defaults to pulling the unmodified
// value from the left side
int offset = i;
// check to see if we are writing this component
for (size_t j = 0; j < fComponents.size(); j++) {
if (fComponents[j] == i) {
// we're writing to this component, so adjust the offset to pull from
// the correct component of the right side instead of preserving the
// value from the left
offset = (int) (j + fBaseType.columns());
break;
}
}
fGen.writeWord(offset, out);
}
fGen.writeInstruction(SpvOpStore, fVecPointer, shuffle, out);
}
private:
SPIRVCodeGenerator& fGen;
const SpvId fVecPointer;
const std::vector<int>& fComponents;
const Type& fBaseType;
const Type& fSwizzleType;
};
std::unique_ptr<SPIRVCodeGenerator::LValue> SPIRVCodeGenerator::getLValue(const Expression& expr,
SkWStream& out) {
switch (expr.fKind) {
case Expression::kVariableReference_Kind: {
const Variable& var = ((VariableReference&) expr).fVariable;
auto entry = fVariableMap.find(&var);
ASSERT(entry != fVariableMap.end());
return std::unique_ptr<SPIRVCodeGenerator::LValue>(new PointerLValue(
*this,
entry->second,
this->getType(expr.fType)));
}
case Expression::kIndex_Kind: // fall through
case Expression::kFieldAccess_Kind: {
std::vector<SpvId> chain = this->getAccessChain(expr, out);
SpvId member = this->nextId();
this->writeOpCode(SpvOpAccessChain, (SpvId) (3 + chain.size()), out);
this->writeWord(this->getPointerType(expr.fType, get_storage_class(expr)), out);
this->writeWord(member, out);
for (SpvId idx : chain) {
this->writeWord(idx, out);
}
return std::unique_ptr<SPIRVCodeGenerator::LValue>(new PointerLValue(
*this,
member,
this->getType(expr.fType)));
}
case Expression::kSwizzle_Kind: {
Swizzle& swizzle = (Swizzle&) expr;
size_t count = swizzle.fComponents.size();
SpvId base = this->getLValue(*swizzle.fBase, out)->getPointer();
ASSERT(base);
if (count == 1) {
IntLiteral index(fContext, Position(), swizzle.fComponents[0]);
SpvId member = this->nextId();
this->writeInstruction(SpvOpAccessChain,
this->getPointerType(swizzle.fType,
get_storage_class(*swizzle.fBase)),
member,
base,
this->writeIntLiteral(index),
out);
return std::unique_ptr<SPIRVCodeGenerator::LValue>(new PointerLValue(
*this,
member,
this->getType(expr.fType)));
} else {
return std::unique_ptr<SPIRVCodeGenerator::LValue>(new SwizzleLValue(
*this,
base,
swizzle.fComponents,
swizzle.fBase->fType,
expr.fType));
}
}
default:
// expr isn't actually an lvalue, create a dummy variable for it. This case happens due
// to the need to store values in temporary variables during function calls (see
// comments in getFunctionType); erroneous uses of rvalues as lvalues should have been
// caught by IRGenerator
SpvId result = this->nextId();
SpvId type = this->getPointerType(expr.fType, SpvStorageClassFunction);
this->writeInstruction(SpvOpVariable, type, result, SpvStorageClassFunction,
fVariableBuffer);
this->writeInstruction(SpvOpStore, result, this->writeExpression(expr, out), out);
return std::unique_ptr<SPIRVCodeGenerator::LValue>(new PointerLValue(
*this,
result,
this->getType(expr.fType)));
}
}
SpvId SPIRVCodeGenerator::writeVariableReference(const VariableReference& ref, SkWStream& out) {
auto entry = fVariableMap.find(&ref.fVariable);
ASSERT(entry != fVariableMap.end());
SpvId var = entry->second;
SpvId result = this->nextId();
this->writeInstruction(SpvOpLoad, this->getType(ref.fVariable.fType), result, var, out);
return result;
}
SpvId SPIRVCodeGenerator::writeIndexExpression(const IndexExpression& expr, SkWStream& out) {
return getLValue(expr, out)->load(out);
}
SpvId SPIRVCodeGenerator::writeFieldAccess(const FieldAccess& f, SkWStream& out) {
return getLValue(f, out)->load(out);
}
SpvId SPIRVCodeGenerator::writeSwizzle(const Swizzle& swizzle, SkWStream& out) {
SpvId base = this->writeExpression(*swizzle.fBase, out);
SpvId result = this->nextId();
size_t count = swizzle.fComponents.size();
if (count == 1) {
this->writeInstruction(SpvOpCompositeExtract, this->getType(swizzle.fType), result, base,
swizzle.fComponents[0], out);
} else {
this->writeOpCode(SpvOpVectorShuffle, 5 + (int32_t) count, out);
this->writeWord(this->getType(swizzle.fType), out);
this->writeWord(result, out);
this->writeWord(base, out);
this->writeWord(base, out);
for (int component : swizzle.fComponents) {
this->writeWord(component, out);
}
}
return result;
}
SpvId SPIRVCodeGenerator::writeBinaryOperation(const Type& resultType,
const Type& operandType, SpvId lhs,
SpvId rhs, SpvOp_ ifFloat, SpvOp_ ifInt,
SpvOp_ ifUInt, SpvOp_ ifBool, SkWStream& out) {
SpvId result = this->nextId();
if (is_float(fContext, operandType)) {
this->writeInstruction(ifFloat, this->getType(resultType), result, lhs, rhs, out);
} else if (is_signed(fContext, operandType)) {
this->writeInstruction(ifInt, this->getType(resultType), result, lhs, rhs, out);
} else if (is_unsigned(fContext, operandType)) {
this->writeInstruction(ifUInt, this->getType(resultType), result, lhs, rhs, out);
} else if (operandType == *fContext.fBool_Type) {
this->writeInstruction(ifBool, this->getType(resultType), result, lhs, rhs, out);
} else {
ABORT("invalid operandType: %s", operandType.description().c_str());
}
return result;
}
bool is_assignment(Token::Kind op) {
switch (op) {
case Token::EQ: // fall through
case Token::PLUSEQ: // fall through
case Token::MINUSEQ: // fall through
case Token::STAREQ: // fall through
case Token::SLASHEQ: // fall through
case Token::PERCENTEQ: // fall through
case Token::SHLEQ: // fall through
case Token::SHREQ: // fall through
case Token::BITWISEOREQ: // fall through
case Token::BITWISEXOREQ: // fall through
case Token::BITWISEANDEQ: // fall through
case Token::LOGICALOREQ: // fall through
case Token::LOGICALXOREQ: // fall through
case Token::LOGICALANDEQ:
return true;
default:
return false;
}
}
SpvId SPIRVCodeGenerator::writeBinaryExpression(const BinaryExpression& b, SkWStream& out) {
// handle cases where we don't necessarily evaluate both LHS and RHS
switch (b.fOperator) {
case Token::EQ: {
SpvId rhs = this->writeExpression(*b.fRight, out);
this->getLValue(*b.fLeft, out)->store(rhs, out);
return rhs;
}
case Token::LOGICALAND:
return this->writeLogicalAnd(b, out);
case Token::LOGICALOR:
return this->writeLogicalOr(b, out);
default:
break;
}
// "normal" operators
const Type& resultType = b.fType;
std::unique_ptr<LValue> lvalue;
SpvId lhs;
if (is_assignment(b.fOperator)) {
lvalue = this->getLValue(*b.fLeft, out);
lhs = lvalue->load(out);
} else {
lvalue = nullptr;
lhs = this->writeExpression(*b.fLeft, out);
}
SpvId rhs = this->writeExpression(*b.fRight, out);
// component type we are operating on: float, int, uint
const Type* operandType;
// IR allows mismatched types in expressions (e.g. vec2 * float), but they need special handling
// in SPIR-V
if (b.fLeft->fType != b.fRight->fType) {
if (b.fLeft->fType.kind() == Type::kVector_Kind &&
b.fRight->fType.isNumber()) {
// promote number to vector
SpvId vec = this->nextId();
this->writeOpCode(SpvOpCompositeConstruct, 3 + b.fType.columns(), out);
this->writeWord(this->getType(resultType), out);
this->writeWord(vec, out);
for (int i = 0; i < resultType.columns(); i++) {
this->writeWord(rhs, out);
}
rhs = vec;
operandType = &b.fRight->fType;
} else if (b.fRight->fType.kind() == Type::kVector_Kind &&
b.fLeft->fType.isNumber()) {
// promote number to vector
SpvId vec = this->nextId();
this->writeOpCode(SpvOpCompositeConstruct, 3 + b.fType.columns(), out);
this->writeWord(this->getType(resultType), out);
this->writeWord(vec, out);
for (int i = 0; i < resultType.columns(); i++) {
this->writeWord(lhs, out);
}
lhs = vec;
ASSERT(!lvalue);
operandType = &b.fLeft->fType;
} else if (b.fLeft->fType.kind() == Type::kMatrix_Kind) {
SpvOp_ op;
if (b.fRight->fType.kind() == Type::kMatrix_Kind) {
op = SpvOpMatrixTimesMatrix;
} else if (b.fRight->fType.kind() == Type::kVector_Kind) {
op = SpvOpMatrixTimesVector;
} else {
ASSERT(b.fRight->fType.kind() == Type::kScalar_Kind);
op = SpvOpMatrixTimesScalar;
}
SpvId result = this->nextId();
this->writeInstruction(op, this->getType(b.fType), result, lhs, rhs, out);
if (b.fOperator == Token::STAREQ) {
lvalue->store(result, out);
} else {
ASSERT(b.fOperator == Token::STAR);
}
return result;
} else if (b.fRight->fType.kind() == Type::kMatrix_Kind) {
SpvId result = this->nextId();
if (b.fLeft->fType.kind() == Type::kVector_Kind) {
this->writeInstruction(SpvOpVectorTimesMatrix, this->getType(b.fType), result,
lhs, rhs, out);
} else {
ASSERT(b.fLeft->fType.kind() == Type::kScalar_Kind);
this->writeInstruction(SpvOpMatrixTimesScalar, this->getType(b.fType), result, rhs,
lhs, out);
}
if (b.fOperator == Token::STAREQ) {
lvalue->store(result, out);
} else {
ASSERT(b.fOperator == Token::STAR);
}
return result;
} else {
ABORT("unsupported binary expression: %s", b.description().c_str());
}
} else {
operandType = &b.fLeft->fType;
ASSERT(*operandType == b.fRight->fType);
}
switch (b.fOperator) {
case Token::EQEQ:
ASSERT(resultType == *fContext.fBool_Type);
return this->writeBinaryOperation(resultType, *operandType, lhs, rhs, SpvOpFOrdEqual,
SpvOpIEqual, SpvOpIEqual, SpvOpLogicalEqual, out);
case Token::NEQ:
ASSERT(resultType == *fContext.fBool_Type);
return this->writeBinaryOperation(resultType, *operandType, lhs, rhs, SpvOpFOrdNotEqual,
SpvOpINotEqual, SpvOpINotEqual, SpvOpLogicalNotEqual,
out);
case Token::GT:
ASSERT(resultType == *fContext.fBool_Type);
return this->writeBinaryOperation(resultType, *operandType, lhs, rhs,
SpvOpFOrdGreaterThan, SpvOpSGreaterThan,
SpvOpUGreaterThan, SpvOpUndef, out);
case Token::LT:
ASSERT(resultType == *fContext.fBool_Type);
return this->writeBinaryOperation(resultType, *operandType, lhs, rhs, SpvOpFOrdLessThan,
SpvOpSLessThan, SpvOpULessThan, SpvOpUndef, out);
case Token::GTEQ:
ASSERT(resultType == *fContext.fBool_Type);
return this->writeBinaryOperation(resultType, *operandType, lhs, rhs,
SpvOpFOrdGreaterThanEqual, SpvOpSGreaterThanEqual,
SpvOpUGreaterThanEqual, SpvOpUndef, out);
case Token::LTEQ:
ASSERT(resultType == *fContext.fBool_Type);
return this->writeBinaryOperation(resultType, *operandType, lhs, rhs,
SpvOpFOrdLessThanEqual, SpvOpSLessThanEqual,
SpvOpULessThanEqual, SpvOpUndef, out);
case Token::PLUS:
return this->writeBinaryOperation(resultType, *operandType, lhs, rhs, SpvOpFAdd,
SpvOpIAdd, SpvOpIAdd, SpvOpUndef, out);
case Token::MINUS:
return this->writeBinaryOperation(resultType, *operandType, lhs, rhs, SpvOpFSub,
SpvOpISub, SpvOpISub, SpvOpUndef, out);
case Token::STAR:
if (b.fLeft->fType.kind() == Type::kMatrix_Kind &&
b.fRight->fType.kind() == Type::kMatrix_Kind) {
// matrix multiply
SpvId result = this->nextId();
this->writeInstruction(SpvOpMatrixTimesMatrix, this->getType(resultType), result,
lhs, rhs, out);
return result;
}
return this->writeBinaryOperation(resultType, *operandType, lhs, rhs, SpvOpFMul,
SpvOpIMul, SpvOpIMul, SpvOpUndef, out);
case Token::SLASH:
return this->writeBinaryOperation(resultType, *operandType, lhs, rhs, SpvOpFDiv,
SpvOpSDiv, SpvOpUDiv, SpvOpUndef, out);
case Token::PLUSEQ: {
SpvId result = this->writeBinaryOperation(resultType, *operandType, lhs, rhs, SpvOpFAdd,
SpvOpIAdd, SpvOpIAdd, SpvOpUndef, out);
ASSERT(lvalue);
lvalue->store(result, out);
return result;
}
case Token::MINUSEQ: {
SpvId result = this->writeBinaryOperation(resultType, *operandType, lhs, rhs, SpvOpFSub,
SpvOpISub, SpvOpISub, SpvOpUndef, out);
ASSERT(lvalue);
lvalue->store(result, out);
return result;
}
case Token::STAREQ: {
if (b.fLeft->fType.kind() == Type::kMatrix_Kind &&
b.fRight->fType.kind() == Type::kMatrix_Kind) {
// matrix multiply
SpvId result = this->nextId();
this->writeInstruction(SpvOpMatrixTimesMatrix, this->getType(resultType), result,
lhs, rhs, out);
ASSERT(lvalue);
lvalue->store(result, out);
return result;
}
SpvId result = this->writeBinaryOperation(resultType, *operandType, lhs, rhs, SpvOpFMul,
SpvOpIMul, SpvOpIMul, SpvOpUndef, out);
ASSERT(lvalue);
lvalue->store(result, out);
return result;
}
case Token::SLASHEQ: {
SpvId result = this->writeBinaryOperation(resultType, *operandType, lhs, rhs, SpvOpFDiv,
SpvOpSDiv, SpvOpUDiv, SpvOpUndef, out);
ASSERT(lvalue);
lvalue->store(result, out);
return result;
}
default:
// FIXME: missing support for some operators (bitwise, &&=, ||=, shift...)
ABORT("unsupported binary expression: %s", b.description().c_str());
}
}
SpvId SPIRVCodeGenerator::writeLogicalAnd(const BinaryExpression& a, SkWStream& out) {
ASSERT(a.fOperator == Token::LOGICALAND);
BoolLiteral falseLiteral(fContext, Position(), false);
SpvId falseConstant = this->writeBoolLiteral(falseLiteral);
SpvId lhs = this->writeExpression(*a.fLeft, out);
SpvId rhsLabel = this->nextId();
SpvId end = this->nextId();
SpvId lhsBlock = fCurrentBlock;
this->writeInstruction(SpvOpSelectionMerge, end, SpvSelectionControlMaskNone, out);
this->writeInstruction(SpvOpBranchConditional, lhs, rhsLabel, end, out);
this->writeLabel(rhsLabel, out);
SpvId rhs = this->writeExpression(*a.fRight, out);
SpvId rhsBlock = fCurrentBlock;
this->writeInstruction(SpvOpBranch, end, out);
this->writeLabel(end, out);
SpvId result = this->nextId();
this->writeInstruction(SpvOpPhi, this->getType(*fContext.fBool_Type), result, falseConstant,
lhsBlock, rhs, rhsBlock, out);
return result;
}
SpvId SPIRVCodeGenerator::writeLogicalOr(const BinaryExpression& o, SkWStream& out) {
ASSERT(o.fOperator == Token::LOGICALOR);
BoolLiteral trueLiteral(fContext, Position(), true);
SpvId trueConstant = this->writeBoolLiteral(trueLiteral);
SpvId lhs = this->writeExpression(*o.fLeft, out);
SpvId rhsLabel = this->nextId();
SpvId end = this->nextId();
SpvId lhsBlock = fCurrentBlock;
this->writeInstruction(SpvOpSelectionMerge, end, SpvSelectionControlMaskNone, out);
this->writeInstruction(SpvOpBranchConditional, lhs, end, rhsLabel, out);
this->writeLabel(rhsLabel, out);
SpvId rhs = this->writeExpression(*o.fRight, out);
SpvId rhsBlock = fCurrentBlock;
this->writeInstruction(SpvOpBranch, end, out);
this->writeLabel(end, out);
SpvId result = this->nextId();
this->writeInstruction(SpvOpPhi, this->getType(*fContext.fBool_Type), result, trueConstant,
lhsBlock, rhs, rhsBlock, out);
return result;
}
SpvId SPIRVCodeGenerator::writeTernaryExpression(const TernaryExpression& t, SkWStream& out) {
SpvId test = this->writeExpression(*t.fTest, out);
if (t.fIfTrue->isConstant() && t.fIfFalse->isConstant()) {
// both true and false are constants, can just use OpSelect
SpvId result = this->nextId();
SpvId trueId = this->writeExpression(*t.fIfTrue, out);
SpvId falseId = this->writeExpression(*t.fIfFalse, out);
this->writeInstruction(SpvOpSelect, this->getType(t.fType), result, test, trueId, falseId,
out);
return result;
}
// was originally using OpPhi to choose the result, but for some reason that is crashing on
// Adreno. Switched to storing the result in a temp variable as glslang does.
SpvId var = this->nextId();
this->writeInstruction(SpvOpVariable, this->getPointerType(t.fType, SpvStorageClassFunction),
var, SpvStorageClassFunction, fVariableBuffer);
SpvId trueLabel = this->nextId();
SpvId falseLabel = this->nextId();
SpvId end = this->nextId();
this->writeInstruction(SpvOpSelectionMerge, end, SpvSelectionControlMaskNone, out);
this->writeInstruction(SpvOpBranchConditional, test, trueLabel, falseLabel, out);
this->writeLabel(trueLabel, out);
this->writeInstruction(SpvOpStore, var, this->writeExpression(*t.fIfTrue, out), out);
this->writeInstruction(SpvOpBranch, end, out);
this->writeLabel(falseLabel, out);
this->writeInstruction(SpvOpStore, var, this->writeExpression(*t.fIfFalse, out), out);
this->writeInstruction(SpvOpBranch, end, out);
this->writeLabel(end, out);
SpvId result = this->nextId();
this->writeInstruction(SpvOpLoad, this->getType(t.fType), result, var, out);
return result;
}
std::unique_ptr<Expression> create_literal_1(const Context& context, const Type& type) {
if (type == *context.fInt_Type) {
return std::unique_ptr<Expression>(new IntLiteral(context, Position(), 1));
}
else if (type == *context.fFloat_Type) {
return std::unique_ptr<Expression>(new FloatLiteral(context, Position(), 1.0));
} else {
ABORT("math is unsupported on type '%s'")
}
}
SpvId SPIRVCodeGenerator::writePrefixExpression(const PrefixExpression& p, SkWStream& out) {
if (p.fOperator == Token::MINUS) {
SpvId result = this->nextId();
SpvId typeId = this->getType(p.fType);
SpvId expr = this->writeExpression(*p.fOperand, out);
if (is_float(fContext, p.fType)) {
this->writeInstruction(SpvOpFNegate, typeId, result, expr, out);
} else if (is_signed(fContext, p.fType)) {
this->writeInstruction(SpvOpSNegate, typeId, result, expr, out);
} else {
ABORT("unsupported prefix expression %s", p.description().c_str());
};
return result;
}
switch (p.fOperator) {
case Token::PLUS:
return this->writeExpression(*p.fOperand, out);
case Token::PLUSPLUS: {
std::unique_ptr<LValue> lv = this->getLValue(*p.fOperand, out);
SpvId one = this->writeExpression(*create_literal_1(fContext, p.fType), out);
SpvId result = this->writeBinaryOperation(p.fType, p.fType, lv->load(out), one,
SpvOpFAdd, SpvOpIAdd, SpvOpIAdd, SpvOpUndef,
out);
lv->store(result, out);
return result;
}
case Token::MINUSMINUS: {
std::unique_ptr<LValue> lv = this->getLValue(*p.fOperand, out);
SpvId one = this->writeExpression(*create_literal_1(fContext, p.fType), out);
SpvId result = this->writeBinaryOperation(p.fType, p.fType, lv->load(out), one,
SpvOpFSub, SpvOpISub, SpvOpISub, SpvOpUndef,
out);
lv->store(result, out);
return result;
}
case Token::LOGICALNOT: {
ASSERT(p.fOperand->fType == *fContext.fBool_Type);
SpvId result = this->nextId();
this->writeInstruction(SpvOpLogicalNot, this->getType(p.fOperand->fType), result,
this->writeExpression(*p.fOperand, out), out);
return result;
}
case Token::BITWISENOT: {
SpvId result = this->nextId();
this->writeInstruction(SpvOpNot, this->getType(p.fOperand->fType), result,
this->writeExpression(*p.fOperand, out), out);
return result;
}
default:
ABORT("unsupported prefix expression: %s", p.description().c_str());
}
}
SpvId SPIRVCodeGenerator::writePostfixExpression(const PostfixExpression& p, SkWStream& out) {
std::unique_ptr<LValue> lv = this->getLValue(*p.fOperand, out);
SpvId result = lv->load(out);
SpvId one = this->writeExpression(*create_literal_1(fContext, p.fType), out);
switch (p.fOperator) {
case Token::PLUSPLUS: {
SpvId temp = this->writeBinaryOperation(p.fType, p.fType, result, one, SpvOpFAdd,
SpvOpIAdd, SpvOpIAdd, SpvOpUndef, out);
lv->store(temp, out);
return result;
}
case Token::MINUSMINUS: {
SpvId temp = this->writeBinaryOperation(p.fType, p.fType, result, one, SpvOpFSub,
SpvOpISub, SpvOpISub, SpvOpUndef, out);
lv->store(temp, out);
return result;
}
default:
ABORT("unsupported postfix expression %s", p.description().c_str());
}
}
SpvId SPIRVCodeGenerator::writeBoolLiteral(const BoolLiteral& b) {
if (b.fValue) {
if (fBoolTrue == 0) {
fBoolTrue = this->nextId();
this->writeInstruction(SpvOpConstantTrue, this->getType(b.fType), fBoolTrue,
fConstantBuffer);
}
return fBoolTrue;
} else {
if (fBoolFalse == 0) {
fBoolFalse = this->nextId();
this->writeInstruction(SpvOpConstantFalse, this->getType(b.fType), fBoolFalse,
fConstantBuffer);
}
return fBoolFalse;
}
}
SpvId SPIRVCodeGenerator::writeIntLiteral(const IntLiteral& i) {
if (i.fType == *fContext.fInt_Type) {
auto entry = fIntConstants.find(i.fValue);
if (entry == fIntConstants.end()) {
SpvId result = this->nextId();
this->writeInstruction(SpvOpConstant, this->getType(i.fType), result, (SpvId) i.fValue,
fConstantBuffer);
fIntConstants[i.fValue] = result;
return result;
}
return entry->second;
} else {
ASSERT(i.fType == *fContext.fUInt_Type);
auto entry = fUIntConstants.find(i.fValue);
if (entry == fUIntConstants.end()) {
SpvId result = this->nextId();
this->writeInstruction(SpvOpConstant, this->getType(i.fType), result, (SpvId) i.fValue,
fConstantBuffer);
fUIntConstants[i.fValue] = result;
return result;
}
return entry->second;
}
}
SpvId SPIRVCodeGenerator::writeFloatLiteral(const FloatLiteral& f) {
if (f.fType == *fContext.fFloat_Type) {
float value = (float) f.fValue;
auto entry = fFloatConstants.find(value);
if (entry == fFloatConstants.end()) {
SpvId result = this->nextId();
uint32_t bits;
ASSERT(sizeof(bits) == sizeof(value));
memcpy(&bits, &value, sizeof(bits));
this->writeInstruction(SpvOpConstant, this->getType(f.fType), result, bits,
fConstantBuffer);
fFloatConstants[value] = result;
return result;
}
return entry->second;
} else {
ASSERT(f.fType == *fContext.fDouble_Type);
auto entry = fDoubleConstants.find(f.fValue);
if (entry == fDoubleConstants.end()) {
SpvId result = this->nextId();
uint64_t bits;
ASSERT(sizeof(bits) == sizeof(f.fValue));
memcpy(&bits, &f.fValue, sizeof(bits));
this->writeInstruction(SpvOpConstant, this->getType(f.fType), result,
bits & 0xffffffff, bits >> 32, fConstantBuffer);
fDoubleConstants[f.fValue] = result;
return result;
}
return entry->second;
}
}
SpvId SPIRVCodeGenerator::writeFunctionStart(const FunctionDeclaration& f, SkWStream& out) {
SpvId result = fFunctionMap[&f];
this->writeInstruction(SpvOpFunction, this->getType(f.fReturnType), result,
SpvFunctionControlMaskNone, this->getFunctionType(f), out);
this->writeInstruction(SpvOpName, result, f.fName.c_str(), fNameBuffer);
for (size_t i = 0; i < f.fParameters.size(); i++) {
SpvId id = this->nextId();
fVariableMap[f.fParameters[i]] = id;
SpvId type;
type = this->getPointerType(f.fParameters[i]->fType, SpvStorageClassFunction);
this->writeInstruction(SpvOpFunctionParameter, type, id, out);
}
return result;
}
SpvId SPIRVCodeGenerator::writeFunction(const FunctionDefinition& f, SkWStream& out) {
SpvId result = this->writeFunctionStart(f.fDeclaration, out);
this->writeLabel(this->nextId(), out);
if (f.fDeclaration.fName == "main") {
write_data(*fGlobalInitializersBuffer.detachAsData(), out);
}
SkDynamicMemoryWStream bodyBuffer;
this->writeBlock(*f.fBody, bodyBuffer);
write_data(*fVariableBuffer.detachAsData(), out);
write_data(*bodyBuffer.detachAsData(), out);
if (fCurrentBlock) {
this->writeInstruction(SpvOpReturn, out);
}
this->writeInstruction(SpvOpFunctionEnd, out);
return result;
}
void SPIRVCodeGenerator::writeLayout(const Layout& layout, SpvId target) {
if (layout.fLocation >= 0) {
this->writeInstruction(SpvOpDecorate, target, SpvDecorationLocation, layout.fLocation,
fDecorationBuffer);
}
if (layout.fBinding >= 0) {
this->writeInstruction(SpvOpDecorate, target, SpvDecorationBinding, layout.fBinding,
fDecorationBuffer);
}
if (layout.fIndex >= 0) {
this->writeInstruction(SpvOpDecorate, target, SpvDecorationIndex, layout.fIndex,
fDecorationBuffer);
}
if (layout.fSet >= 0) {
this->writeInstruction(SpvOpDecorate, target, SpvDecorationDescriptorSet, layout.fSet,
fDecorationBuffer);
}
if (layout.fBuiltin >= 0 && layout.fBuiltin != SK_FRAGCOLOR_BUILTIN) {
this->writeInstruction(SpvOpDecorate, target, SpvDecorationBuiltIn, layout.fBuiltin,
fDecorationBuffer);
}
}
void SPIRVCodeGenerator::writeLayout(const Layout& layout, SpvId target, int member) {
if (layout.fLocation >= 0) {
this->writeInstruction(SpvOpMemberDecorate, target, member, SpvDecorationLocation,
layout.fLocation, fDecorationBuffer);
}
if (layout.fBinding >= 0) {
this->writeInstruction(SpvOpMemberDecorate, target, member, SpvDecorationBinding,
layout.fBinding, fDecorationBuffer);
}
if (layout.fIndex >= 0) {
this->writeInstruction(SpvOpMemberDecorate, target, member, SpvDecorationIndex,
layout.fIndex, fDecorationBuffer);
}
if (layout.fSet >= 0) {
this->writeInstruction(SpvOpMemberDecorate, target, member, SpvDecorationDescriptorSet,
layout.fSet, fDecorationBuffer);
}
if (layout.fBuiltin >= 0) {
this->writeInstruction(SpvOpMemberDecorate, target, member, SpvDecorationBuiltIn,
layout.fBuiltin, fDecorationBuffer);
}
}
SpvId SPIRVCodeGenerator::writeInterfaceBlock(const InterfaceBlock& intf) {
SpvId type = this->getType(intf.fVariable.fType);
SpvId result = this->nextId();
this->writeInstruction(SpvOpDecorate, type, SpvDecorationBlock, fDecorationBuffer);
SpvStorageClass_ storageClass = get_storage_class(intf.fVariable.fModifiers);
SpvId ptrType = this->nextId();
this->writeInstruction(SpvOpTypePointer, ptrType, storageClass, type, fConstantBuffer);
this->writeInstruction(SpvOpVariable, ptrType, result, storageClass, fConstantBuffer);
this->writeLayout(intf.fVariable.fModifiers.fLayout, result);
fVariableMap[&intf.fVariable] = result;
return result;
}
#define BUILTIN_IGNORE 9999
void SPIRVCodeGenerator::writeGlobalVars(Program::Kind kind, const VarDeclarations& decl,
SkWStream& out) {
for (size_t i = 0; i < decl.fVars.size(); i++) {
const VarDeclaration& varDecl = decl.fVars[i];
const Variable* var = varDecl.fVar;
if (var->fModifiers.fLayout.fBuiltin == BUILTIN_IGNORE) {
continue;
}
if (var->fModifiers.fLayout.fBuiltin == SK_FRAGCOLOR_BUILTIN &&
kind != Program::kFragment_Kind) {
continue;
}
if (!var->fIsReadFrom && !var->fIsWrittenTo &&
!(var->fModifiers.fFlags & (Modifiers::kIn_Flag |
Modifiers::kOut_Flag |
Modifiers::kUniform_Flag))) {
// variable is dead and not an input / output var (the Vulkan debug layers complain if
// we elide an interface var, even if it's dead)
continue;
}
SpvStorageClass_ storageClass;
if (var->fModifiers.fFlags & Modifiers::kIn_Flag) {
storageClass = SpvStorageClassInput;
} else if (var->fModifiers.fFlags & Modifiers::kOut_Flag) {
storageClass = SpvStorageClassOutput;
} else if (var->fModifiers.fFlags & Modifiers::kUniform_Flag) {
if (var->fType.kind() == Type::kSampler_Kind) {
storageClass = SpvStorageClassUniformConstant;
} else {
storageClass = SpvStorageClassUniform;
}
} else {
storageClass = SpvStorageClassPrivate;
}
SpvId id = this->nextId();
fVariableMap[var] = id;
SpvId type = this->getPointerType(var->fType, storageClass);
this->writeInstruction(SpvOpVariable, type, id, storageClass, fConstantBuffer);
this->writeInstruction(SpvOpName, id, var->fName.c_str(), fNameBuffer);
if (var->fType.kind() == Type::kMatrix_Kind) {
this->writeInstruction(SpvOpMemberDecorate, id, (SpvId) i, SpvDecorationColMajor,
fDecorationBuffer);
this->writeInstruction(SpvOpMemberDecorate, id, (SpvId) i, SpvDecorationMatrixStride,
(SpvId) var->fType.stride(), fDecorationBuffer);
}
if (varDecl.fValue) {
ASSERT(!fCurrentBlock);
fCurrentBlock = -1;
SpvId value = this->writeExpression(*varDecl.fValue, fGlobalInitializersBuffer);
this->writeInstruction(SpvOpStore, id, value, fGlobalInitializersBuffer);
fCurrentBlock = 0;
}
this->writeLayout(var->fModifiers.fLayout, id);
}
}
void SPIRVCodeGenerator::writeVarDeclarations(const VarDeclarations& decl, SkWStream& out) {
for (const auto& varDecl : decl.fVars) {
const Variable* var = varDecl.fVar;
SpvId id = this->nextId();
fVariableMap[var] = id;
SpvId type = this->getPointerType(var->fType, SpvStorageClassFunction);
this->writeInstruction(SpvOpVariable, type, id, SpvStorageClassFunction, fVariableBuffer);
this->writeInstruction(SpvOpName, id, var->fName.c_str(), fNameBuffer);
if (varDecl.fValue) {
SpvId value = this->writeExpression(*varDecl.fValue, out);
this->writeInstruction(SpvOpStore, id, value, out);
}
}
}
void SPIRVCodeGenerator::writeStatement(const Statement& s, SkWStream& out) {
switch (s.fKind) {
case Statement::kBlock_Kind:
this->writeBlock((Block&) s, out);
break;
case Statement::kExpression_Kind:
this->writeExpression(*((ExpressionStatement&) s).fExpression, out);
break;
case Statement::kReturn_Kind:
this->writeReturnStatement((ReturnStatement&) s, out);
break;
case Statement::kVarDeclarations_Kind:
this->writeVarDeclarations(*((VarDeclarationsStatement&) s).fDeclaration, out);
break;
case Statement::kIf_Kind:
this->writeIfStatement((IfStatement&) s, out);
break;
case Statement::kFor_Kind:
this->writeForStatement((ForStatement&) s, out);
break;
case Statement::kBreak_Kind:
this->writeInstruction(SpvOpBranch, fBreakTarget.top(), out);
break;
case Statement::kContinue_Kind:
this->writeInstruction(SpvOpBranch, fContinueTarget.top(), out);
break;
case Statement::kDiscard_Kind:
this->writeInstruction(SpvOpKill, out);
break;
default:
ABORT("unsupported statement: %s", s.description().c_str());
}
}
void SPIRVCodeGenerator::writeBlock(const Block& b, SkWStream& out) {
for (size_t i = 0; i < b.fStatements.size(); i++) {
this->writeStatement(*b.fStatements[i], out);
}
}
void SPIRVCodeGenerator::writeIfStatement(const IfStatement& stmt, SkWStream& out) {
SpvId test = this->writeExpression(*stmt.fTest, out);
SpvId ifTrue = this->nextId();
SpvId ifFalse = this->nextId();
if (stmt.fIfFalse) {
SpvId end = this->nextId();
this->writeInstruction(SpvOpSelectionMerge, end, SpvSelectionControlMaskNone, out);
this->writeInstruction(SpvOpBranchConditional, test, ifTrue, ifFalse, out);
this->writeLabel(ifTrue, out);
this->writeStatement(*stmt.fIfTrue, out);
if (fCurrentBlock) {
this->writeInstruction(SpvOpBranch, end, out);
}
this->writeLabel(ifFalse, out);
this->writeStatement(*stmt.fIfFalse, out);
if (fCurrentBlock) {
this->writeInstruction(SpvOpBranch, end, out);
}
this->writeLabel(end, out);
} else {
this->writeInstruction(SpvOpSelectionMerge, ifFalse, SpvSelectionControlMaskNone, out);
this->writeInstruction(SpvOpBranchConditional, test, ifTrue, ifFalse, out);
this->writeLabel(ifTrue, out);
this->writeStatement(*stmt.fIfTrue, out);
if (fCurrentBlock) {
this->writeInstruction(SpvOpBranch, ifFalse, out);
}
this->writeLabel(ifFalse, out);
}
}
void SPIRVCodeGenerator::writeForStatement(const ForStatement& f, SkWStream& out) {
if (f.fInitializer) {
this->writeStatement(*f.fInitializer, out);
}
SpvId header = this->nextId();
SpvId start = this->nextId();
SpvId body = this->nextId();
SpvId next = this->nextId();
fContinueTarget.push(next);
SpvId end = this->nextId();
fBreakTarget.push(end);
this->writeInstruction(SpvOpBranch, header, out);
this->writeLabel(header, out);
this->writeInstruction(SpvOpLoopMerge, end, next, SpvLoopControlMaskNone, out);
this->writeInstruction(SpvOpBranch, start, out);
this->writeLabel(start, out);
if (f.fTest) {
SpvId test = this->writeExpression(*f.fTest, out);
this->writeInstruction(SpvOpBranchConditional, test, body, end, out);
}
this->writeLabel(body, out);
this->writeStatement(*f.fStatement, out);
if (fCurrentBlock) {
this->writeInstruction(SpvOpBranch, next, out);
}
this->writeLabel(next, out);
if (f.fNext) {
this->writeExpression(*f.fNext, out);
}
this->writeInstruction(SpvOpBranch, header, out);
this->writeLabel(end, out);
fBreakTarget.pop();
fContinueTarget.pop();
}
void SPIRVCodeGenerator::writeReturnStatement(const ReturnStatement& r, SkWStream& out) {
if (r.fExpression) {
this->writeInstruction(SpvOpReturnValue, this->writeExpression(*r.fExpression, out),
out);
} else {
this->writeInstruction(SpvOpReturn, out);
}
}
void SPIRVCodeGenerator::writeInstructions(const Program& program, SkWStream& out) {
fGLSLExtendedInstructions = this->nextId();
SkDynamicMemoryWStream body;
std::vector<SpvId> interfaceVars;
// assign IDs to functions
for (size_t i = 0; i < program.fElements.size(); i++) {
if (program.fElements[i]->fKind == ProgramElement::kFunction_Kind) {
FunctionDefinition& f = (FunctionDefinition&) *program.fElements[i];
fFunctionMap[&f.fDeclaration] = this->nextId();
}
}
for (size_t i = 0; i < program.fElements.size(); i++) {
if (program.fElements[i]->fKind == ProgramElement::kInterfaceBlock_Kind) {
InterfaceBlock& intf = (InterfaceBlock&) *program.fElements[i];
SpvId id = this->writeInterfaceBlock(intf);
if ((intf.fVariable.fModifiers.fFlags & Modifiers::kIn_Flag) ||
(intf.fVariable.fModifiers.fFlags & Modifiers::kOut_Flag)) {
interfaceVars.push_back(id);
}
}
}
for (size_t i = 0; i < program.fElements.size(); i++) {
if (program.fElements[i]->fKind == ProgramElement::kVar_Kind) {
this->writeGlobalVars(program.fKind, ((VarDeclarations&) *program.fElements[i]),
body);
}
}
for (size_t i = 0; i < program.fElements.size(); i++) {
if (program.fElements[i]->fKind == ProgramElement::kFunction_Kind) {
this->writeFunction(((FunctionDefinition&) *program.fElements[i]), body);
}
}
const FunctionDeclaration* main = nullptr;
for (auto entry : fFunctionMap) {
if (entry.first->fName == "main") {
main = entry.first;
}
}
ASSERT(main);
for (auto entry : fVariableMap) {
const Variable* var = entry.first;
if (var->fStorage == Variable::kGlobal_Storage &&
((var->fModifiers.fFlags & Modifiers::kIn_Flag) ||
(var->fModifiers.fFlags & Modifiers::kOut_Flag))) {
interfaceVars.push_back(entry.second);
}
}
this->writeCapabilities(out);
this->writeInstruction(SpvOpExtInstImport, fGLSLExtendedInstructions, "GLSL.std.450", out);
this->writeInstruction(SpvOpMemoryModel, SpvAddressingModelLogical, SpvMemoryModelGLSL450, out);
this->writeOpCode(SpvOpEntryPoint, (SpvId) (3 + (strlen(main->fName.c_str()) + 4) / 4) +
(int32_t) interfaceVars.size(), out);
switch (program.fKind) {
case Program::kVertex_Kind:
this->writeWord(SpvExecutionModelVertex, out);
break;
case Program::kFragment_Kind:
this->writeWord(SpvExecutionModelFragment, out);
break;
}
this->writeWord(fFunctionMap[main], out);
this->writeString(main->fName.c_str(), out);
for (int var : interfaceVars) {
this->writeWord(var, out);
}
if (program.fKind == Program::kFragment_Kind) {
this->writeInstruction(SpvOpExecutionMode,
fFunctionMap[main],
SpvExecutionModeOriginUpperLeft,
out);
}
for (size_t i = 0; i < program.fElements.size(); i++) {
if (program.fElements[i]->fKind == ProgramElement::kExtension_Kind) {
this->writeInstruction(SpvOpSourceExtension,
((Extension&) *program.fElements[i]).fName.c_str(),
out);
}
}
write_data(*fNameBuffer.detachAsData(), out);
write_data(*fDecorationBuffer.detachAsData(), out);
write_data(*fConstantBuffer.detachAsData(), out);
write_data(*fExternalFunctionsBuffer.detachAsData(), out);
write_data(*body.detachAsData(), out);
}
void SPIRVCodeGenerator::generateCode(const Program& program, SkWStream& out) {
this->writeWord(SpvMagicNumber, out);
this->writeWord(SpvVersion, out);
this->writeWord(SKSL_MAGIC, out);
SkDynamicMemoryWStream buffer;
this->writeInstructions(program, buffer);
this->writeWord(fIdCount, out);
this->writeWord(0, out); // reserved, always zero
write_data(*buffer.detachAsData(), out);
}
}