blob: 00ab25cf0a0f4fb96ec752b300f5885ef6527e66 [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 "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[String("round")] = ALL_GLSL(Round);
fIntrinsicMap[String("roundEven")] = ALL_GLSL(RoundEven);
fIntrinsicMap[String("trunc")] = ALL_GLSL(Trunc);
fIntrinsicMap[String("abs")] = BY_TYPE_GLSL(FAbs, SAbs, SAbs);
fIntrinsicMap[String("sign")] = BY_TYPE_GLSL(FSign, SSign, SSign);
fIntrinsicMap[String("floor")] = ALL_GLSL(Floor);
fIntrinsicMap[String("ceil")] = ALL_GLSL(Ceil);
fIntrinsicMap[String("fract")] = ALL_GLSL(Fract);
fIntrinsicMap[String("radians")] = ALL_GLSL(Radians);
fIntrinsicMap[String("degrees")] = ALL_GLSL(Degrees);
fIntrinsicMap[String("sin")] = ALL_GLSL(Sin);
fIntrinsicMap[String("cos")] = ALL_GLSL(Cos);
fIntrinsicMap[String("tan")] = ALL_GLSL(Tan);
fIntrinsicMap[String("asin")] = ALL_GLSL(Asin);
fIntrinsicMap[String("acos")] = ALL_GLSL(Acos);
fIntrinsicMap[String("atan")] = SPECIAL(Atan);
fIntrinsicMap[String("sinh")] = ALL_GLSL(Sinh);
fIntrinsicMap[String("cosh")] = ALL_GLSL(Cosh);
fIntrinsicMap[String("tanh")] = ALL_GLSL(Tanh);
fIntrinsicMap[String("asinh")] = ALL_GLSL(Asinh);
fIntrinsicMap[String("acosh")] = ALL_GLSL(Acosh);
fIntrinsicMap[String("atanh")] = ALL_GLSL(Atanh);
fIntrinsicMap[String("pow")] = ALL_GLSL(Pow);
fIntrinsicMap[String("exp")] = ALL_GLSL(Exp);
fIntrinsicMap[String("log")] = ALL_GLSL(Log);
fIntrinsicMap[String("exp2")] = ALL_GLSL(Exp2);
fIntrinsicMap[String("log2")] = ALL_GLSL(Log2);
fIntrinsicMap[String("sqrt")] = ALL_GLSL(Sqrt);
fIntrinsicMap[String("inversesqrt")] = ALL_GLSL(InverseSqrt);
fIntrinsicMap[String("determinant")] = ALL_GLSL(Determinant);
fIntrinsicMap[String("matrixInverse")] = ALL_GLSL(MatrixInverse);
fIntrinsicMap[String("mod")] = std::make_tuple(kSPIRV_IntrinsicKind, SpvOpFMod,
SpvOpSMod, SpvOpUMod, SpvOpUndef);
fIntrinsicMap[String("min")] = BY_TYPE_GLSL(FMin, SMin, UMin);
fIntrinsicMap[String("max")] = BY_TYPE_GLSL(FMax, SMax, UMax);
fIntrinsicMap[String("clamp")] = BY_TYPE_GLSL(FClamp, SClamp, UClamp);
fIntrinsicMap[String("dot")] = std::make_tuple(kSPIRV_IntrinsicKind, SpvOpDot,
SpvOpUndef, SpvOpUndef, SpvOpUndef);
fIntrinsicMap[String("mix")] = ALL_GLSL(FMix);
fIntrinsicMap[String("step")] = ALL_GLSL(Step);
fIntrinsicMap[String("smoothstep")] = ALL_GLSL(SmoothStep);
fIntrinsicMap[String("fma")] = ALL_GLSL(Fma);
fIntrinsicMap[String("frexp")] = ALL_GLSL(Frexp);
fIntrinsicMap[String("ldexp")] = ALL_GLSL(Ldexp);
#define PACK(type) fIntrinsicMap[String("pack" #type)] = ALL_GLSL(Pack ## type); \
fIntrinsicMap[String("unpack" #type)] = ALL_GLSL(Unpack ## type)
PACK(Snorm4x8);
PACK(Unorm4x8);
PACK(Snorm2x16);
PACK(Unorm2x16);
PACK(Half2x16);
PACK(Double2x32);
fIntrinsicMap[String("length")] = ALL_GLSL(Length);
fIntrinsicMap[String("distance")] = ALL_GLSL(Distance);
fIntrinsicMap[String("cross")] = ALL_GLSL(Cross);
fIntrinsicMap[String("normalize")] = ALL_GLSL(Normalize);
fIntrinsicMap[String("faceForward")] = ALL_GLSL(FaceForward);
fIntrinsicMap[String("reflect")] = ALL_GLSL(Reflect);
fIntrinsicMap[String("refract")] = ALL_GLSL(Refract);
fIntrinsicMap[String("findLSB")] = ALL_GLSL(FindILsb);
fIntrinsicMap[String("findMSB")] = BY_TYPE_GLSL(FindSMsb, FindSMsb, FindUMsb);
fIntrinsicMap[String("dFdx")] = std::make_tuple(kSPIRV_IntrinsicKind, SpvOpDPdx,
SpvOpUndef, SpvOpUndef, SpvOpUndef);
fIntrinsicMap[String("dFdy")] = std::make_tuple(kSPIRV_IntrinsicKind, SpvOpDPdy,
SpvOpUndef, SpvOpUndef, SpvOpUndef);
fIntrinsicMap[String("dFdy")] = std::make_tuple(kSPIRV_IntrinsicKind, SpvOpDPdy,
SpvOpUndef, SpvOpUndef, SpvOpUndef);
fIntrinsicMap[String("texture")] = SPECIAL(Texture);
fIntrinsicMap[String("texelFetch")] = SPECIAL(TexelFetch);
fIntrinsicMap[String("subpassLoad")] = SPECIAL(SubpassLoad);
fIntrinsicMap[String("any")] = std::make_tuple(kSPIRV_IntrinsicKind, SpvOpUndef,
SpvOpUndef, SpvOpUndef, SpvOpAny);
fIntrinsicMap[String("all")] = std::make_tuple(kSPIRV_IntrinsicKind, SpvOpUndef,
SpvOpUndef, SpvOpUndef, SpvOpAll);
fIntrinsicMap[String("equal")] = std::make_tuple(kSPIRV_IntrinsicKind,
SpvOpFOrdEqual, SpvOpIEqual,
SpvOpIEqual, SpvOpLogicalEqual);
fIntrinsicMap[String("notEqual")] = std::make_tuple(kSPIRV_IntrinsicKind,
SpvOpFOrdNotEqual, SpvOpINotEqual,
SpvOpINotEqual,
SpvOpLogicalNotEqual);
fIntrinsicMap[String("lessThan")] = std::make_tuple(kSPIRV_IntrinsicKind,
SpvOpSLessThan, SpvOpULessThan,
SpvOpFOrdLessThan, SpvOpUndef);
fIntrinsicMap[String("lessThanEqual")] = std::make_tuple(kSPIRV_IntrinsicKind,
SpvOpSLessThanEqual,
SpvOpULessThanEqual,
SpvOpFOrdLessThanEqual,
SpvOpUndef);
fIntrinsicMap[String("greaterThan")] = std::make_tuple(kSPIRV_IntrinsicKind,
SpvOpSGreaterThan,
SpvOpUGreaterThan,
SpvOpFOrdGreaterThan,
SpvOpUndef);
fIntrinsicMap[String("greaterThanEqual")] = std::make_tuple(kSPIRV_IntrinsicKind,
SpvOpSGreaterThanEqual,
SpvOpUGreaterThanEqual,
SpvOpFOrdGreaterThanEqual,
SpvOpUndef);
// interpolateAt* not yet supported...
}
void SPIRVCodeGenerator::writeWord(int32_t word, OutputStream& 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 String opcode_text(SpvOp_ opCode) {
switch (opCode) {
case SpvOpNop:
return String("Nop");
case SpvOpUndef:
return String("Undef");
case SpvOpSourceContinued:
return String("SourceContinued");
case SpvOpSource:
return String("Source");
case SpvOpSourceExtension:
return String("SourceExtension");
case SpvOpName:
return String("Name");
case SpvOpMemberName:
return String("MemberName");
case SpvOpString:
return String("String");
case SpvOpLine:
return String("Line");
case SpvOpExtension:
return String("Extension");
case SpvOpExtInstImport:
return String("ExtInstImport");
case SpvOpExtInst:
return String("ExtInst");
case SpvOpMemoryModel:
return String("MemoryModel");
case SpvOpEntryPoint:
return String("EntryPoint");
case SpvOpExecutionMode:
return String("ExecutionMode");
case SpvOpCapability:
return String("Capability");
case SpvOpTypeVoid:
return String("TypeVoid");
case SpvOpTypeBool:
return String("TypeBool");
case SpvOpTypeInt:
return String("TypeInt");
case SpvOpTypeFloat:
return String("TypeFloat");
case SpvOpTypeVector:
return String("TypeVector");
case SpvOpTypeMatrix:
return String("TypeMatrix");
case SpvOpTypeImage:
return String("TypeImage");
case SpvOpTypeSampler:
return String("TypeSampler");
case SpvOpTypeSampledImage:
return String("TypeSampledImage");
case SpvOpTypeArray:
return String("TypeArray");
case SpvOpTypeRuntimeArray:
return String("TypeRuntimeArray");
case SpvOpTypeStruct:
return String("TypeStruct");
case SpvOpTypeOpaque:
return String("TypeOpaque");
case SpvOpTypePointer:
return String("TypePointer");
case SpvOpTypeFunction:
return String("TypeFunction");
case SpvOpTypeEvent:
return String("TypeEvent");
case SpvOpTypeDeviceEvent:
return String("TypeDeviceEvent");
case SpvOpTypeReserveId:
return String("TypeReserveId");
case SpvOpTypeQueue:
return String("TypeQueue");
case SpvOpTypePipe:
return String("TypePipe");
case SpvOpTypeForwardPointer:
return String("TypeForwardPointer");
case SpvOpConstantTrue:
return String("ConstantTrue");
case SpvOpConstantFalse:
return String("ConstantFalse");
case SpvOpConstant:
return String("Constant");
case SpvOpConstantComposite:
return String("ConstantComposite");
case SpvOpConstantSampler:
return String("ConstantSampler");
case SpvOpConstantNull:
return String("ConstantNull");
case SpvOpSpecConstantTrue:
return String("SpecConstantTrue");
case SpvOpSpecConstantFalse:
return String("SpecConstantFalse");
case SpvOpSpecConstant:
return String("SpecConstant");
case SpvOpSpecConstantComposite:
return String("SpecConstantComposite");
case SpvOpSpecConstantOp:
return String("SpecConstantOp");
case SpvOpFunction:
return String("Function");
case SpvOpFunctionParameter:
return String("FunctionParameter");
case SpvOpFunctionEnd:
return String("FunctionEnd");
case SpvOpFunctionCall:
return String("FunctionCall");
case SpvOpVariable:
return String("Variable");
case SpvOpImageTexelPointer:
return String("ImageTexelPointer");
case SpvOpLoad:
return String("Load");
case SpvOpStore:
return String("Store");
case SpvOpCopyMemory:
return String("CopyMemory");
case SpvOpCopyMemorySized:
return String("CopyMemorySized");
case SpvOpAccessChain:
return String("AccessChain");
case SpvOpInBoundsAccessChain:
return String("InBoundsAccessChain");
case SpvOpPtrAccessChain:
return String("PtrAccessChain");
case SpvOpArrayLength:
return String("ArrayLength");
case SpvOpGenericPtrMemSemantics:
return String("GenericPtrMemSemantics");
case SpvOpInBoundsPtrAccessChain:
return String("InBoundsPtrAccessChain");
case SpvOpDecorate:
return String("Decorate");
case SpvOpMemberDecorate:
return String("MemberDecorate");
case SpvOpDecorationGroup:
return String("DecorationGroup");
case SpvOpGroupDecorate:
return String("GroupDecorate");
case SpvOpGroupMemberDecorate:
return String("GroupMemberDecorate");
case SpvOpVectorExtractDynamic:
return String("VectorExtractDynamic");
case SpvOpVectorInsertDynamic:
return String("VectorInsertDynamic");
case SpvOpVectorShuffle:
return String("VectorShuffle");
case SpvOpCompositeConstruct:
return String("CompositeConstruct");
case SpvOpCompositeExtract:
return String("CompositeExtract");
case SpvOpCompositeInsert:
return String("CompositeInsert");
case SpvOpCopyObject:
return String("CopyObject");
case SpvOpTranspose:
return String("Transpose");
case SpvOpSampledImage:
return String("SampledImage");
case SpvOpImageSampleImplicitLod:
return String("ImageSampleImplicitLod");
case SpvOpImageSampleExplicitLod:
return String("ImageSampleExplicitLod");
case SpvOpImageSampleDrefImplicitLod:
return String("ImageSampleDrefImplicitLod");
case SpvOpImageSampleDrefExplicitLod:
return String("ImageSampleDrefExplicitLod");
case SpvOpImageSampleProjImplicitLod:
return String("ImageSampleProjImplicitLod");
case SpvOpImageSampleProjExplicitLod:
return String("ImageSampleProjExplicitLod");
case SpvOpImageSampleProjDrefImplicitLod:
return String("ImageSampleProjDrefImplicitLod");
case SpvOpImageSampleProjDrefExplicitLod:
return String("ImageSampleProjDrefExplicitLod");
case SpvOpImageFetch:
return String("ImageFetch");
case SpvOpImageGather:
return String("ImageGather");
case SpvOpImageDrefGather:
return String("ImageDrefGather");
case SpvOpImageRead:
return String("ImageRead");
case SpvOpImageWrite:
return String("ImageWrite");
case SpvOpImage:
return String("Image");
case SpvOpImageQueryFormat:
return String("ImageQueryFormat");
case SpvOpImageQueryOrder:
return String("ImageQueryOrder");
case SpvOpImageQuerySizeLod:
return String("ImageQuerySizeLod");
case SpvOpImageQuerySize:
return String("ImageQuerySize");
case SpvOpImageQueryLod:
return String("ImageQueryLod");
case SpvOpImageQueryLevels:
return String("ImageQueryLevels");
case SpvOpImageQuerySamples:
return String("ImageQuerySamples");
case SpvOpConvertFToU:
return String("ConvertFToU");
case SpvOpConvertFToS:
return String("ConvertFToS");
case SpvOpConvertSToF:
return String("ConvertSToF");
case SpvOpConvertUToF:
return String("ConvertUToF");
case SpvOpUConvert:
return String("UConvert");
case SpvOpSConvert:
return String("SConvert");
case SpvOpFConvert:
return String("FConvert");
case SpvOpQuantizeToF16:
return String("QuantizeToF16");
case SpvOpConvertPtrToU:
return String("ConvertPtrToU");
case SpvOpSatConvertSToU:
return String("SatConvertSToU");
case SpvOpSatConvertUToS:
return String("SatConvertUToS");
case SpvOpConvertUToPtr:
return String("ConvertUToPtr");
case SpvOpPtrCastToGeneric:
return String("PtrCastToGeneric");
case SpvOpGenericCastToPtr:
return String("GenericCastToPtr");
case SpvOpGenericCastToPtrExplicit:
return String("GenericCastToPtrExplicit");
case SpvOpBitcast:
return String("Bitcast");
case SpvOpSNegate:
return String("SNegate");
case SpvOpFNegate:
return String("FNegate");
case SpvOpIAdd:
return String("IAdd");
case SpvOpFAdd:
return String("FAdd");
case SpvOpISub:
return String("ISub");
case SpvOpFSub:
return String("FSub");
case SpvOpIMul:
return String("IMul");
case SpvOpFMul:
return String("FMul");
case SpvOpUDiv:
return String("UDiv");
case SpvOpSDiv:
return String("SDiv");
case SpvOpFDiv:
return String("FDiv");
case SpvOpUMod:
return String("UMod");
case SpvOpSRem:
return String("SRem");
case SpvOpSMod:
return String("SMod");
case SpvOpFRem:
return String("FRem");
case SpvOpFMod:
return String("FMod");
case SpvOpVectorTimesScalar:
return String("VectorTimesScalar");
case SpvOpMatrixTimesScalar:
return String("MatrixTimesScalar");
case SpvOpVectorTimesMatrix:
return String("VectorTimesMatrix");
case SpvOpMatrixTimesVector:
return String("MatrixTimesVector");
case SpvOpMatrixTimesMatrix:
return String("MatrixTimesMatrix");
case SpvOpOuterProduct:
return String("OuterProduct");
case SpvOpDot:
return String("Dot");
case SpvOpIAddCarry:
return String("IAddCarry");
case SpvOpISubBorrow:
return String("ISubBorrow");
case SpvOpUMulExtended:
return String("UMulExtended");
case SpvOpSMulExtended:
return String("SMulExtended");
case SpvOpAny:
return String("Any");
case SpvOpAll:
return String("All");
case SpvOpIsNan:
return String("IsNan");
case SpvOpIsInf:
return String("IsInf");
case SpvOpIsFinite:
return String("IsFinite");
case SpvOpIsNormal:
return String("IsNormal");
case SpvOpSignBitSet:
return String("SignBitSet");
case SpvOpLessOrGreater:
return String("LessOrGreater");
case SpvOpOrdered:
return String("Ordered");
case SpvOpUnordered:
return String("Unordered");
case SpvOpLogicalEqual:
return String("LogicalEqual");
case SpvOpLogicalNotEqual:
return String("LogicalNotEqual");
case SpvOpLogicalOr:
return String("LogicalOr");
case SpvOpLogicalAnd:
return String("LogicalAnd");
case SpvOpLogicalNot:
return String("LogicalNot");
case SpvOpSelect:
return String("Select");
case SpvOpIEqual:
return String("IEqual");
case SpvOpINotEqual:
return String("INotEqual");
case SpvOpUGreaterThan:
return String("UGreaterThan");
case SpvOpSGreaterThan:
return String("SGreaterThan");
case SpvOpUGreaterThanEqual:
return String("UGreaterThanEqual");
case SpvOpSGreaterThanEqual:
return String("SGreaterThanEqual");
case SpvOpULessThan:
return String("ULessThan");
case SpvOpSLessThan:
return String("SLessThan");
case SpvOpULessThanEqual:
return String("ULessThanEqual");
case SpvOpSLessThanEqual:
return String("SLessThanEqual");
case SpvOpFOrdEqual:
return String("FOrdEqual");
case SpvOpFUnordEqual:
return String("FUnordEqual");
case SpvOpFOrdNotEqual:
return String("FOrdNotEqual");
case SpvOpFUnordNotEqual:
return String("FUnordNotEqual");
case SpvOpFOrdLessThan:
return String("FOrdLessThan");
case SpvOpFUnordLessThan:
return String("FUnordLessThan");
case SpvOpFOrdGreaterThan:
return String("FOrdGreaterThan");
case SpvOpFUnordGreaterThan:
return String("FUnordGreaterThan");
case SpvOpFOrdLessThanEqual:
return String("FOrdLessThanEqual");
case SpvOpFUnordLessThanEqual:
return String("FUnordLessThanEqual");
case SpvOpFOrdGreaterThanEqual:
return String("FOrdGreaterThanEqual");
case SpvOpFUnordGreaterThanEqual:
return String("FUnordGreaterThanEqual");
case SpvOpShiftRightLogical:
return String("ShiftRightLogical");
case SpvOpShiftRightArithmetic:
return String("ShiftRightArithmetic");
case SpvOpShiftLeftLogical:
return String("ShiftLeftLogical");
case SpvOpBitwiseOr:
return String("BitwiseOr");
case SpvOpBitwiseXor:
return String("BitwiseXor");
case SpvOpBitwiseAnd:
return String("BitwiseAnd");
case SpvOpNot:
return String("Not");
case SpvOpBitFieldInsert:
return String("BitFieldInsert");
case SpvOpBitFieldSExtract:
return String("BitFieldSExtract");
case SpvOpBitFieldUExtract:
return String("BitFieldUExtract");
case SpvOpBitReverse:
return String("BitReverse");
case SpvOpBitCount:
return String("BitCount");
case SpvOpDPdx:
return String("DPdx");
case SpvOpDPdy:
return String("DPdy");
case SpvOpFwidth:
return String("Fwidth");
case SpvOpDPdxFine:
return String("DPdxFine");
case SpvOpDPdyFine:
return String("DPdyFine");
case SpvOpFwidthFine:
return String("FwidthFine");
case SpvOpDPdxCoarse:
return String("DPdxCoarse");
case SpvOpDPdyCoarse:
return String("DPdyCoarse");
case SpvOpFwidthCoarse:
return String("FwidthCoarse");
case SpvOpEmitVertex:
return String("EmitVertex");
case SpvOpEndPrimitive:
return String("EndPrimitive");
case SpvOpEmitStreamVertex:
return String("EmitStreamVertex");
case SpvOpEndStreamPrimitive:
return String("EndStreamPrimitive");
case SpvOpControlBarrier:
return String("ControlBarrier");
case SpvOpMemoryBarrier:
return String("MemoryBarrier");
case SpvOpAtomicLoad:
return String("AtomicLoad");
case SpvOpAtomicStore:
return String("AtomicStore");
case SpvOpAtomicExchange:
return String("AtomicExchange");
case SpvOpAtomicCompareExchange:
return String("AtomicCompareExchange");
case SpvOpAtomicCompareExchangeWeak:
return String("AtomicCompareExchangeWeak");
case SpvOpAtomicIIncrement:
return String("AtomicIIncrement");
case SpvOpAtomicIDecrement:
return String("AtomicIDecrement");
case SpvOpAtomicIAdd:
return String("AtomicIAdd");
case SpvOpAtomicISub:
return String("AtomicISub");
case SpvOpAtomicSMin:
return String("AtomicSMin");
case SpvOpAtomicUMin:
return String("AtomicUMin");
case SpvOpAtomicSMax:
return String("AtomicSMax");
case SpvOpAtomicUMax:
return String("AtomicUMax");
case SpvOpAtomicAnd:
return String("AtomicAnd");
case SpvOpAtomicOr:
return String("AtomicOr");
case SpvOpAtomicXor:
return String("AtomicXor");
case SpvOpPhi:
return String("Phi");
case SpvOpLoopMerge:
return String("LoopMerge");
case SpvOpSelectionMerge:
return String("SelectionMerge");
case SpvOpLabel:
return String("Label");
case SpvOpBranch:
return String("Branch");
case SpvOpBranchConditional:
return String("BranchConditional");
case SpvOpSwitch:
return String("Switch");
case SpvOpKill:
return String("Kill");
case SpvOpReturn:
return String("Return");
case SpvOpReturnValue:
return String("ReturnValue");
case SpvOpUnreachable:
return String("Unreachable");
case SpvOpLifetimeStart:
return String("LifetimeStart");
case SpvOpLifetimeStop:
return String("LifetimeStop");
case SpvOpGroupAsyncCopy:
return String("GroupAsyncCopy");
case SpvOpGroupWaitEvents:
return String("GroupWaitEvents");
case SpvOpGroupAll:
return String("GroupAll");
case SpvOpGroupAny:
return String("GroupAny");
case SpvOpGroupBroadcast:
return String("GroupBroadcast");
case SpvOpGroupIAdd:
return String("GroupIAdd");
case SpvOpGroupFAdd:
return String("GroupFAdd");
case SpvOpGroupFMin:
return String("GroupFMin");
case SpvOpGroupUMin:
return String("GroupUMin");
case SpvOpGroupSMin:
return String("GroupSMin");
case SpvOpGroupFMax:
return String("GroupFMax");
case SpvOpGroupUMax:
return String("GroupUMax");
case SpvOpGroupSMax:
return String("GroupSMax");
case SpvOpReadPipe:
return String("ReadPipe");
case SpvOpWritePipe:
return String("WritePipe");
case SpvOpReservedReadPipe:
return String("ReservedReadPipe");
case SpvOpReservedWritePipe:
return String("ReservedWritePipe");
case SpvOpReserveReadPipePackets:
return String("ReserveReadPipePackets");
case SpvOpReserveWritePipePackets:
return String("ReserveWritePipePackets");
case SpvOpCommitReadPipe:
return String("CommitReadPipe");
case SpvOpCommitWritePipe:
return String("CommitWritePipe");
case SpvOpIsValidReserveId:
return String("IsValidReserveId");
case SpvOpGetNumPipePackets:
return String("GetNumPipePackets");
case SpvOpGetMaxPipePackets:
return String("GetMaxPipePackets");
case SpvOpGroupReserveReadPipePackets:
return String("GroupReserveReadPipePackets");
case SpvOpGroupReserveWritePipePackets:
return String("GroupReserveWritePipePackets");
case SpvOpGroupCommitReadPipe:
return String("GroupCommitReadPipe");
case SpvOpGroupCommitWritePipe:
return String("GroupCommitWritePipe");
case SpvOpEnqueueMarker:
return String("EnqueueMarker");
case SpvOpEnqueueKernel:
return String("EnqueueKernel");
case SpvOpGetKernelNDrangeSubGroupCount:
return String("GetKernelNDrangeSubGroupCount");
case SpvOpGetKernelNDrangeMaxSubGroupSize:
return String("GetKernelNDrangeMaxSubGroupSize");
case SpvOpGetKernelWorkGroupSize:
return String("GetKernelWorkGroupSize");
case SpvOpGetKernelPreferredWorkGroupSizeMultiple:
return String("GetKernelPreferredWorkGroupSizeMultiple");
case SpvOpRetainEvent:
return String("RetainEvent");
case SpvOpReleaseEvent:
return String("ReleaseEvent");
case SpvOpCreateUserEvent:
return String("CreateUserEvent");
case SpvOpIsValidEvent:
return String("IsValidEvent");
case SpvOpSetUserEventStatus:
return String("SetUserEventStatus");
case SpvOpCaptureEventProfilingInfo:
return String("CaptureEventProfilingInfo");
case SpvOpGetDefaultQueue:
return String("GetDefaultQueue");
case SpvOpBuildNDRange:
return String("BuildNDRange");
case SpvOpImageSparseSampleImplicitLod:
return String("ImageSparseSampleImplicitLod");
case SpvOpImageSparseSampleExplicitLod:
return String("ImageSparseSampleExplicitLod");
case SpvOpImageSparseSampleDrefImplicitLod:
return String("ImageSparseSampleDrefImplicitLod");
case SpvOpImageSparseSampleDrefExplicitLod:
return String("ImageSparseSampleDrefExplicitLod");
case SpvOpImageSparseSampleProjImplicitLod:
return String("ImageSparseSampleProjImplicitLod");
case SpvOpImageSparseSampleProjExplicitLod:
return String("ImageSparseSampleProjExplicitLod");
case SpvOpImageSparseSampleProjDrefImplicitLod:
return String("ImageSparseSampleProjDrefImplicitLod");
case SpvOpImageSparseSampleProjDrefExplicitLod:
return String("ImageSparseSampleProjDrefExplicitLod");
case SpvOpImageSparseFetch:
return String("ImageSparseFetch");
case SpvOpImageSparseGather:
return String("ImageSparseGather");
case SpvOpImageSparseDrefGather:
return String("ImageSparseDrefGather");
case SpvOpImageSparseTexelsResident:
return String("ImageSparseTexelsResident");
case SpvOpNoLine:
return String("NoLine");
case SpvOpAtomicFlagTestAndSet:
return String("AtomicFlagTestAndSet");
case SpvOpAtomicFlagClear:
return String("AtomicFlagClear");
case SpvOpImageSparseRead:
return String("ImageSparseRead");
default:
ABORT("unsupported SPIR-V op");
}
}
#endif
void SPIRVCodeGenerator::writeOpCode(SpvOp_ opCode, int length, OutputStream& 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, OutputStream& out) {
fCurrentBlock = label;
this->writeInstruction(SpvOpLabel, label, out);
}
void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, OutputStream& out) {
this->writeOpCode(opCode, 1, out);
}
void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, int32_t word1, OutputStream& out) {
this->writeOpCode(opCode, 2, out);
this->writeWord(word1, out);
}
void SPIRVCodeGenerator::writeString(const char* string, OutputStream& out) {
size_t length = strlen(string);
out.write(string, length);
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, OutputStream& 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,
OutputStream& 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, OutputStream& 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,
OutputStream& 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, OutputStream& 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, OutputStream& 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,
OutputStream& 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, OutputStream& 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, OutputStream& 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,
OutputStream& 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(OutputStream& 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, const MemoryLayout& memoryLayout,
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, memoryLayout));
}
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 = memoryLayout.size(*type.fields()[i].fType);
size_t alignment = memoryLayout.alignment(*type.fields()[i].fType);
const Layout& fieldLayout = type.fields()[i].fModifiers.fLayout;
if (fieldLayout.fOffset >= 0) {
if (fieldLayout.fOffset < (int) offset) {
fErrors.error(type.fPosition,
"offset of field '" + type.fields()[i].fName + "' must be at "
"least " + to_string((int) offset));
}
if (fieldLayout.fOffset % alignment) {
fErrors.error(type.fPosition,
"offset of field '" + type.fields()[i].fName + "' must be a multiple"
" of " + to_string((int) alignment));
}
offset = fieldLayout.fOffset;
} else {
size_t mod = offset % alignment;
if (mod) {
offset += alignment - mod;
}
}
this->writeInstruction(SpvOpMemberName, resultId, i, type.fields()[i].fName.c_str(),
fNameBuffer);
this->writeLayout(fieldLayout, 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) memoryLayout.stride(*type.fields()[i].fType),
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) {
return this->getType(type, fDefaultLayout);
}
SpvId SPIRVCodeGenerator::getType(const Type& type, const MemoryLayout& layout) {
String key = type.name() + to_string((int) layout.fStd);
auto entry = fTypeMap.find(key);
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(), layout),
type.columns(), fConstantBuffer);
break;
case Type::kMatrix_Kind:
this->writeInstruction(SpvOpTypeMatrix, result,
this->getType(index_type(fContext, type), layout),
type.columns(), fConstantBuffer);
break;
case Type::kStruct_Kind:
this->writeStruct(type, layout, result);
break;
case Type::kArray_Kind: {
if (type.columns() > 0) {
IntLiteral count(fContext, Position(), type.columns());
this->writeInstruction(SpvOpTypeArray, result,
this->getType(type.componentType(), layout),
this->writeIntLiteral(count), fConstantBuffer);
this->writeInstruction(SpvOpDecorate, result, SpvDecorationArrayStride,
(int32_t) layout.stride(type),
fDecorationBuffer);
} else {
this->writeInstruction(SpvOpTypeRuntimeArray, result,
this->getType(type.componentType(), layout),
fConstantBuffer);
this->writeInstruction(SpvOpDecorate, result, SpvDecorationArrayStride,
(int32_t) layout.stride(type),
fDecorationBuffer);
}
break;
}
case Type::kSampler_Kind: {
SpvId image = result;
if (SpvDimSubpassData != type.dimensions()) {
image = this->nextId();
}
if (SpvDimBuffer == type.dimensions()) {
fCapabilities |= (((uint64_t) 1) << SpvCapabilitySampledBuffer);
}
this->writeInstruction(SpvOpTypeImage, image,
this->getType(*fContext.fFloat_Type, layout),
type.dimensions(), type.isDepth(), type.isArrayed(),
type.isMultisampled(), type.isSampled() ? 1 : 2,
SpvImageFormatUnknown, fConstantBuffer);
fImageTypeMap[key] = image;
if (SpvDimSubpassData != type.dimensions()) {
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[key] = result;
return result;
}
return entry->second;
}
SpvId SPIRVCodeGenerator::getImageType(const Type& type) {
ASSERT(type.kind() == Type::kSampler_Kind);
this->getType(type);
String key = type.name() + to_string((int) fDefaultLayout.fStd);
ASSERT(fImageTypeMap.find(key) != fImageTypeMap.end());
return fImageTypeMap[key];
}
SpvId SPIRVCodeGenerator::getFunctionType(const FunctionDeclaration& function) {
String key = function.fReturnType.description() + "(";
String 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) {
return this->getPointerType(type, fDefaultLayout, storageClass);
}
SpvId SPIRVCodeGenerator::getPointerType(const Type& type, const MemoryLayout& layout,
SpvStorageClass_ storageClass) {
String key = type.description() + "*" + to_string(layout.fStd) + 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, OutputStream& 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, OutputStream& 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,
OutputStream& 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);
}
break;
}
case kSubpassLoad_SpecialIntrinsic: {
SpvId img = this->writeExpression(*c.fArguments[0], out);
std::vector<std::unique_ptr<Expression>> args;
args.emplace_back(new FloatLiteral(fContext, Position(), 0.0));
args.emplace_back(new FloatLiteral(fContext, Position(), 0.0));
Constructor ctor(Position(), *fContext.fVec2_Type, std::move(args));
SpvId coords = this->writeConstantVector(ctor);
if (1 == c.fArguments.size()) {
this->writeInstruction(SpvOpImageRead,
this->getType(c.fType),
result,
img,
coords,
out);
} else {
ASSERT(2 == c.fArguments.size());
SpvId sample = this->writeExpression(*c.fArguments[1], out);
this->writeInstruction(SpvOpImageRead,
this->getType(c.fType),
result,
img,
coords,
SpvImageOperandsSampleMask,
sample,
out);
}
break;
}
case kTexelFetch_SpecialIntrinsic: {
ASSERT(c.fArguments.size() == 2);
SpvId image = this->nextId();
this->writeInstruction(SpvOpImage,
this->getImageType(c.fArguments[0]->fType),
image,
this->writeExpression(*c.fArguments[0], out),
out);
this->writeInstruction(SpvOpImageFetch,
this->getType(c.fType),
result,
image,
this->writeExpression(*c.fArguments[1], out),
out);
break;
}
case kTexture_SpecialIntrinsic: {
SpvOp_ op = SpvOpImageSampleImplicitLod;
switch (c.fArguments[0]->fType.dimensions()) {
case SpvDim1D:
if (c.fArguments[1]->fType == *fContext.fVec2_Type) {
op = SpvOpImageSampleProjImplicitLod;
} else {
ASSERT(c.fArguments[1]->fType == *fContext.fFloat_Type);
}
break;
case SpvDim2D:
if (c.fArguments[1]->fType == *fContext.fVec3_Type) {
op = SpvOpImageSampleProjImplicitLod;
} else {
ASSERT(c.fArguments[1]->fType == *fContext.fVec2_Type);
}
break;
case SpvDim3D:
if (c.fArguments[1]->fType == *fContext.fVec4_Type) {
op = SpvOpImageSampleProjImplicitLod;
} else {
ASSERT(c.fArguments[1]->fType == *fContext.fVec3_Type);
}
break;
case SpvDimCube: // fall through
case SpvDimRect: // fall through
case SpvDimBuffer: // fall through
case SpvDimSubpassData:
break;
}
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(op, type, result, sampler, uv,
SpvImageOperandsBiasMask,
this->writeExpression(*c.fArguments[2], out),
out);
} else {
ASSERT(c.fArguments.size() == 2);
this->writeInstruction(op, type, result, sampler, uv,
out);
}
break;
}
}
return result;
}
SpvId SPIRVCodeGenerator::writeFunctionCall(const FunctionCall& c, OutputStream& 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, OutputStream& 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, OutputStream& 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;
}
void SPIRVCodeGenerator::writeUniformScaleMatrix(SpvId id, SpvId diagonal, const Type& type,
OutputStream& out) {
FloatLiteral zero(fContext, Position(), 0);
SpvId zeroId = this->writeFloatLiteral(zero);
std::vector<SpvId> columnIds;
for (int column = 0; column < type.columns(); column++) {
this->writeOpCode(SpvOpCompositeConstruct, 3 + type.rows(),
out);
this->writeWord(this->getType(type.componentType().toCompound(fContext, type.rows(), 1)),
out);
SpvId columnId = this->nextId();
this->writeWord(columnId, out);
columnIds.push_back(columnId);
for (int row = 0; row < type.columns(); row++) {
this->writeWord(row == column ? diagonal : zeroId, out);
}
}
this->writeOpCode(SpvOpCompositeConstruct, 3 + type.columns(),
out);
this->writeWord(this->getType(type), out);
this->writeWord(id, out);
for (SpvId id : columnIds) {
this->writeWord(id, out);
}
}
void SPIRVCodeGenerator::writeMatrixCopy(SpvId id, SpvId src, const Type& srcType,
const Type& dstType, OutputStream& out) {
ABORT("unimplemented");
}
SpvId SPIRVCodeGenerator::writeMatrixConstructor(const Constructor& c, OutputStream& 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();
if (arguments.size() == 1 && c.fArguments[0]->fType.kind() == Type::kScalar_Kind) {
this->writeUniformScaleMatrix(result, arguments[0], c.fType, out);
} else if (arguments.size() == 1 && c.fArguments[0]->fType.kind() == Type::kMatrix_Kind) {
this->writeMatrixCopy(result, arguments[0], c.fArguments[0]->fType, c.fType, 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, OutputStream& 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, OutputStream& 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) {
ASSERT(!modifiers.fLayout.fPushConstant);
return SpvStorageClassInput;
} else if (modifiers.fFlags & Modifiers::kOut_Flag) {
ASSERT(!modifiers.fLayout.fPushConstant);
return SpvStorageClassOutput;
} else if (modifiers.fFlags & Modifiers::kUniform_Flag) {
if (modifiers.fLayout.fPushConstant) {
return SpvStorageClassPushConstant;
}
return SpvStorageClassUniform;
} else {
return SpvStorageClassFunction;
}
}
SpvStorageClass_ get_storage_class(const Expression& expr) {
switch (expr.fKind) {
case Expression::kVariableReference_Kind: {
const Variable& var = ((VariableReference&) expr).fVariable;
if (var.fStorage != Variable::kGlobal_Storage) {
return SpvStorageClassFunction;
}
return get_storage_class(var.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, OutputStream& 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(OutputStream& out) override {
SpvId result = fGen.nextId();
fGen.writeInstruction(SpvOpLoad, fType, result, fPointer, out);
return result;
}
virtual void store(SpvId value, OutputStream& 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(OutputStream& 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, OutputStream& 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,
OutputStream& 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, OutputStream& out) {
SpvId result = this->nextId();
auto entry = fVariableMap.find(&ref.fVariable);
ASSERT(entry != fVariableMap.end());
SpvId var = entry->second;
this->writeInstruction(SpvOpLoad, this->getType(ref.fVariable.fType), result, var, out);
if (ref.fVariable.fModifiers.fLayout.fBuiltin == SK_FRAGCOORD_BUILTIN &&
fProgram.fSettings.fFlipY) {
// need to remap to a top-left coordinate system
if (fRTHeightStructId == (SpvId) -1) {
// height variable hasn't been written yet
std::shared_ptr<SymbolTable> st(new SymbolTable(&fErrors));
ASSERT(fRTHeightFieldIndex == (SpvId) -1);
std::vector<Type::Field> fields;
fields.emplace_back(Modifiers(), String(SKSL_RTHEIGHT_NAME),
fContext.fFloat_Type.get());
String name("sksl_synthetic_uniforms");
Type intfStruct(Position(), name, fields);
Layout layout(-1, -1, 1, -1, -1, -1, -1, false, false, false,
Layout::Format::kUnspecified, false, Layout::kUnspecified_Primitive, -1,
-1);
Variable* intfVar = new Variable(Position(),
Modifiers(layout, Modifiers::kUniform_Flag),
name,
intfStruct,
Variable::kGlobal_Storage);
fSynthetics.takeOwnership(intfVar);
InterfaceBlock intf(Position(), intfVar, name, String(""),
std::vector<std::unique_ptr<Expression>>(), st);
fRTHeightStructId = this->writeInterfaceBlock(intf);
fRTHeightFieldIndex = 0;
}
ASSERT(fRTHeightFieldIndex != (SpvId) -1);
// write vec4(gl_FragCoord.x, u_skRTHeight - gl_FragCoord.y, 0.0, 1.0)
SpvId xId = this->nextId();
this->writeInstruction(SpvOpCompositeExtract, this->getType(*fContext.fFloat_Type), xId,
result, 0, out);
IntLiteral fieldIndex(fContext, Position(), fRTHeightFieldIndex);
SpvId fieldIndexId = this->writeIntLiteral(fieldIndex);
SpvId heightPtr = this->nextId();
this->writeOpCode(SpvOpAccessChain, 5, out);
this->writeWord(this->getPointerType(*fContext.fFloat_Type, SpvStorageClassUniform), out);
this->writeWord(heightPtr, out);
this->writeWord(fRTHeightStructId, out);
this->writeWord(fieldIndexId, out);
SpvId heightRead = this->nextId();
this->writeInstruction(SpvOpLoad, this->getType(*fContext.fFloat_Type), heightRead,
heightPtr, out);
SpvId rawYId = this->nextId();
this->writeInstruction(SpvOpCompositeExtract, this->getType(*fContext.fFloat_Type), rawYId,
result, 1, out);
SpvId flippedYId = this->nextId();
this->writeInstruction(SpvOpFSub, this->getType(*fContext.fFloat_Type), flippedYId,
heightRead, rawYId, out);
FloatLiteral zero(fContext, Position(), 0.0);
SpvId zeroId = writeFloatLiteral(zero);
FloatLiteral one(fContext, Position(), 1.0);
SpvId oneId = writeFloatLiteral(one);
SpvId flipped = this->nextId();
this->writeOpCode(SpvOpCompositeConstruct, 7, out);
this->writeWord(this->getType(*fContext.fVec4_Type), out);
this->writeWord(flipped, out);
this->writeWord(xId, out);
this->writeWord(flippedYId, out);
this->writeWord(zeroId, out);
this->writeWord(oneId, out);
return flipped;
}
return result;
}
SpvId SPIRVCodeGenerator::writeIndexExpression(const IndexExpression& expr, OutputStream& out) {
return getLValue(expr, out)->load(out);
}
SpvId SPIRVCodeGenerator::writeFieldAccess(const FieldAccess& f, OutputStream& out) {
return getLValue(f, out)->load(out);
}
SpvId SPIRVCodeGenerator::writeSwizzle(const Swizzle& swizzle, OutputStream& 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, OutputStream& 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::foldToBool(SpvId id, const Type& operandType, OutputStream& out) {
if (operandType.kind() == Type::kVector_Kind) {
SpvId result = this->nextId();
this->writeInstruction(SpvOpAll, this->getType(*fContext.fBool_Type), result, id, out);
return result;
}
return id;
}
SpvId SPIRVCodeGenerator::writeBinaryExpression(const BinaryExpression& b, OutputStream& 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->foldToBool(this->writeBinaryOperation(resultType, *operandType, lhs, rhs,
SpvOpFOrdEqual, SpvOpIEqual,
SpvOpIEqual, SpvOpLogicalEqual, out),
*operandType, out);
}
case Token::NEQ:
ASSERT(resultType == *fContext.fBool_Type);
return this->foldToBool(this->writeBinaryOperation(resultType, *operandType, lhs, rhs,
SpvOpFOrdNotEqual, SpvOpINotEqual,
SpvOpINotEqual, SpvOpLogicalNotEqual,
out),
*operandType, 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::PERCENT:
return this->writeBinaryOperation(resultType, *operandType, lhs, rhs, SpvOpFMod,
SpvOpSMod, SpvOpUMod, 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);
</