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// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "OutputASM.h"
#include "Common/Math.hpp"
#include "common/debug.h"
#include "InfoSink.h"
#include "libGLESv2/Shader.h"
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <GLES3/gl3.h>
#include <stdlib.h>
namespace
{
GLenum glVariableType(const TType &type)
{
switch(type.getBasicType())
{
case EbtFloat:
if(type.isScalar())
{
return GL_FLOAT;
}
else if(type.isVector())
{
switch(type.getNominalSize())
{
case 2: return GL_FLOAT_VEC2;
case 3: return GL_FLOAT_VEC3;
case 4: return GL_FLOAT_VEC4;
default: UNREACHABLE(type.getNominalSize());
}
}
else if(type.isMatrix())
{
switch(type.getNominalSize())
{
case 2:
switch(type.getSecondarySize())
{
case 2: return GL_FLOAT_MAT2;
case 3: return GL_FLOAT_MAT2x3;
case 4: return GL_FLOAT_MAT2x4;
default: UNREACHABLE(type.getSecondarySize());
}
case 3:
switch(type.getSecondarySize())
{
case 2: return GL_FLOAT_MAT3x2;
case 3: return GL_FLOAT_MAT3;
case 4: return GL_FLOAT_MAT3x4;
default: UNREACHABLE(type.getSecondarySize());
}
case 4:
switch(type.getSecondarySize())
{
case 2: return GL_FLOAT_MAT4x2;
case 3: return GL_FLOAT_MAT4x3;
case 4: return GL_FLOAT_MAT4;
default: UNREACHABLE(type.getSecondarySize());
}
default: UNREACHABLE(type.getNominalSize());
}
}
else UNREACHABLE(0);
break;
case EbtInt:
if(type.isScalar())
{
return GL_INT;
}
else if(type.isVector())
{
switch(type.getNominalSize())
{
case 2: return GL_INT_VEC2;
case 3: return GL_INT_VEC3;
case 4: return GL_INT_VEC4;
default: UNREACHABLE(type.getNominalSize());
}
}
else UNREACHABLE(0);
break;
case EbtUInt:
if(type.isScalar())
{
return GL_UNSIGNED_INT;
}
else if(type.isVector())
{
switch(type.getNominalSize())
{
case 2: return GL_UNSIGNED_INT_VEC2;
case 3: return GL_UNSIGNED_INT_VEC3;
case 4: return GL_UNSIGNED_INT_VEC4;
default: UNREACHABLE(type.getNominalSize());
}
}
else UNREACHABLE(0);
break;
case EbtBool:
if(type.isScalar())
{
return GL_BOOL;
}
else if(type.isVector())
{
switch(type.getNominalSize())
{
case 2: return GL_BOOL_VEC2;
case 3: return GL_BOOL_VEC3;
case 4: return GL_BOOL_VEC4;
default: UNREACHABLE(type.getNominalSize());
}
}
else UNREACHABLE(0);
break;
case EbtSampler2D:
return GL_SAMPLER_2D;
case EbtISampler2D:
return GL_INT_SAMPLER_2D;
case EbtUSampler2D:
return GL_UNSIGNED_INT_SAMPLER_2D;
case EbtSamplerCube:
return GL_SAMPLER_CUBE;
case EbtSampler2DRect:
return GL_SAMPLER_2D_RECT_ARB;
case EbtISamplerCube:
return GL_INT_SAMPLER_CUBE;
case EbtUSamplerCube:
return GL_UNSIGNED_INT_SAMPLER_CUBE;
case EbtSamplerExternalOES:
return GL_SAMPLER_EXTERNAL_OES;
case EbtSampler3D:
return GL_SAMPLER_3D_OES;
case EbtISampler3D:
return GL_INT_SAMPLER_3D;
case EbtUSampler3D:
return GL_UNSIGNED_INT_SAMPLER_3D;
case EbtSampler2DArray:
return GL_SAMPLER_2D_ARRAY;
case EbtISampler2DArray:
return GL_INT_SAMPLER_2D_ARRAY;
case EbtUSampler2DArray:
return GL_UNSIGNED_INT_SAMPLER_2D_ARRAY;
case EbtSampler2DShadow:
return GL_SAMPLER_2D_SHADOW;
case EbtSamplerCubeShadow:
return GL_SAMPLER_CUBE_SHADOW;
case EbtSampler2DArrayShadow:
return GL_SAMPLER_2D_ARRAY_SHADOW;
default:
UNREACHABLE(type.getBasicType());
break;
}
return GL_NONE;
}
GLenum glVariablePrecision(const TType &type)
{
if(type.getBasicType() == EbtFloat)
{
switch(type.getPrecision())
{
case EbpHigh: return GL_HIGH_FLOAT;
case EbpMedium: return GL_MEDIUM_FLOAT;
case EbpLow: return GL_LOW_FLOAT;
case EbpUndefined:
// Should be defined as the default precision by the parser
default: UNREACHABLE(type.getPrecision());
}
}
else if(type.getBasicType() == EbtInt)
{
switch(type.getPrecision())
{
case EbpHigh: return GL_HIGH_INT;
case EbpMedium: return GL_MEDIUM_INT;
case EbpLow: return GL_LOW_INT;
case EbpUndefined:
// Should be defined as the default precision by the parser
default: UNREACHABLE(type.getPrecision());
}
}
// Other types (boolean, sampler) don't have a precision
return GL_NONE;
}
}
namespace glsl
{
// Integer to TString conversion
TString str(int i)
{
char buffer[20];
sprintf(buffer, "%d", i);
return buffer;
}
class Temporary : public TIntermSymbol
{
public:
Temporary(OutputASM *assembler) : TIntermSymbol(TSymbolTableLevel::nextUniqueId(), "tmp", TType(EbtFloat, EbpHigh, EvqTemporary, 4, 1, false)), assembler(assembler)
{
}
~Temporary()
{
assembler->freeTemporary(this);
}
private:
OutputASM *const assembler;
};
class Constant : public TIntermConstantUnion
{
public:
Constant(float x, float y, float z, float w) : TIntermConstantUnion(constants, TType(EbtFloat, EbpHigh, EvqConstExpr, 4, 1, false))
{
constants[0].setFConst(x);
constants[1].setFConst(y);
constants[2].setFConst(z);
constants[3].setFConst(w);
}
Constant(bool b) : TIntermConstantUnion(constants, TType(EbtBool, EbpHigh, EvqConstExpr, 1, 1, false))
{
constants[0].setBConst(b);
}
Constant(int i) : TIntermConstantUnion(constants, TType(EbtInt, EbpHigh, EvqConstExpr, 1, 1, false))
{
constants[0].setIConst(i);
}
~Constant()
{
}
private:
ConstantUnion constants[4];
};
ShaderVariable::ShaderVariable(const TType& type, const std::string& name, int registerIndex) :
type(type.isStruct() ? GL_NONE : glVariableType(type)), precision(glVariablePrecision(type)),
name(name), arraySize(type.getArraySize()), registerIndex(registerIndex)
{
if(type.isStruct())
{
for(const auto& field : type.getStruct()->fields())
{
fields.push_back(ShaderVariable(*(field->type()), field->name().c_str(), -1));
}
}
}
Uniform::Uniform(const TType& type, const std::string &name, int registerIndex, int blockId, const BlockMemberInfo& blockMemberInfo) :
ShaderVariable(type, name, registerIndex), blockId(blockId), blockInfo(blockMemberInfo)
{
}
UniformBlock::UniformBlock(const std::string& name, unsigned int dataSize, unsigned int arraySize,
TLayoutBlockStorage layout, bool isRowMajorLayout, int registerIndex, int blockId) :
name(name), dataSize(dataSize), arraySize(arraySize), layout(layout),
isRowMajorLayout(isRowMajorLayout), registerIndex(registerIndex), blockId(blockId)
{
}
BlockLayoutEncoder::BlockLayoutEncoder()
: mCurrentOffset(0)
{
}
BlockMemberInfo BlockLayoutEncoder::encodeType(const TType &type)
{
int arrayStride;
int matrixStride;
bool isRowMajor = type.getLayoutQualifier().matrixPacking == EmpRowMajor;
getBlockLayoutInfo(type, type.getArraySize(), isRowMajor, &arrayStride, &matrixStride);
const BlockMemberInfo memberInfo(static_cast<int>(mCurrentOffset * BytesPerComponent),
static_cast<int>(arrayStride * BytesPerComponent),
static_cast<int>(matrixStride * BytesPerComponent),
(matrixStride > 0) && isRowMajor);
advanceOffset(type, type.getArraySize(), isRowMajor, arrayStride, matrixStride);
return memberInfo;
}
// static
size_t BlockLayoutEncoder::getBlockRegister(const BlockMemberInfo &info)
{
return (info.offset / BytesPerComponent) / ComponentsPerRegister;
}
// static
size_t BlockLayoutEncoder::getBlockRegisterElement(const BlockMemberInfo &info)
{
return (info.offset / BytesPerComponent) % ComponentsPerRegister;
}
void BlockLayoutEncoder::nextRegister()
{
mCurrentOffset = sw::align(mCurrentOffset, ComponentsPerRegister);
}
Std140BlockEncoder::Std140BlockEncoder() : BlockLayoutEncoder()
{
}
void Std140BlockEncoder::enterAggregateType()
{
nextRegister();
}
void Std140BlockEncoder::exitAggregateType()
{
nextRegister();
}
void Std140BlockEncoder::getBlockLayoutInfo(const TType &type, unsigned int arraySize, bool isRowMajorMatrix, int *arrayStrideOut, int *matrixStrideOut)
{
size_t baseAlignment = 0;
int matrixStride = 0;
int arrayStride = 0;
if(type.isMatrix())
{
baseAlignment = ComponentsPerRegister;
matrixStride = ComponentsPerRegister;
if(arraySize > 0)
{
const int numRegisters = isRowMajorMatrix ? type.getSecondarySize() : type.getNominalSize();
arrayStride = ComponentsPerRegister * numRegisters;
}
}
else if(arraySize > 0)
{
baseAlignment = ComponentsPerRegister;
arrayStride = ComponentsPerRegister;
}
else
{
const size_t numComponents = type.getElementSize();
baseAlignment = (numComponents == 3 ? 4u : numComponents);
}
mCurrentOffset = sw::align(mCurrentOffset, baseAlignment);
*matrixStrideOut = matrixStride;
*arrayStrideOut = arrayStride;
}
void Std140BlockEncoder::advanceOffset(const TType &type, unsigned int arraySize, bool isRowMajorMatrix, int arrayStride, int matrixStride)
{
if(arraySize > 0)
{
mCurrentOffset += arrayStride * arraySize;
}
else if(type.isMatrix())
{
ASSERT(matrixStride == ComponentsPerRegister);
const int numRegisters = isRowMajorMatrix ? type.getSecondarySize() : type.getNominalSize();
mCurrentOffset += ComponentsPerRegister * numRegisters;
}
else
{
mCurrentOffset += type.getElementSize();
}
}
Attribute::Attribute()
{
type = GL_NONE;
arraySize = 0;
registerIndex = 0;
}
Attribute::Attribute(GLenum type, const std::string &name, int arraySize, int location, int registerIndex)
{
this->type = type;
this->name = name;
this->arraySize = arraySize;
this->location = location;
this->registerIndex = registerIndex;
}
sw::PixelShader *Shader::getPixelShader() const
{
return nullptr;
}
sw::VertexShader *Shader::getVertexShader() const
{
return nullptr;
}
OutputASM::TextureFunction::TextureFunction(const TString& nodeName) : method(IMPLICIT), proj(false), offset(false)
{
TString name = TFunction::unmangleName(nodeName);
if(name == "texture2D" || name == "textureCube" || name == "texture" || name == "texture3D" || name == "texture2DRect")
{
method = IMPLICIT;
}
else if(name == "texture2DProj" || name == "textureProj" || name == "texture2DRectProj")
{
method = IMPLICIT;
proj = true;
}
else if(name == "texture2DLod" || name == "textureCubeLod" || name == "textureLod")
{
method = LOD;
}
else if(name == "texture2DProjLod" || name == "textureProjLod")
{
method = LOD;
proj = true;
}
else if(name == "textureSize")
{
method = SIZE;
}
else if(name == "textureOffset")
{
method = IMPLICIT;
offset = true;
}
else if(name == "textureProjOffset")
{
method = IMPLICIT;
offset = true;
proj = true;
}
else if(name == "textureLodOffset")
{
method = LOD;
offset = true;
}
else if(name == "textureProjLodOffset")
{
method = LOD;
proj = true;
offset = true;
}
else if(name == "texelFetch")
{
method = FETCH;
}
else if(name == "texelFetchOffset")
{
method = FETCH;
offset = true;
}
else if(name == "textureGrad")
{
method = GRAD;
}
else if(name == "textureGradOffset")
{
method = GRAD;
offset = true;
}
else if(name == "textureProjGrad")
{
method = GRAD;
proj = true;
}
else if(name == "textureProjGradOffset")
{
method = GRAD;
proj = true;
offset = true;
}
else UNREACHABLE(0);
}
OutputASM::OutputASM(TParseContext &context, Shader *shaderObject) : TIntermTraverser(true, true, true), shaderObject(shaderObject), mContext(context)
{
shader = nullptr;
pixelShader = nullptr;
vertexShader = nullptr;
if(shaderObject)
{
shader = shaderObject->getShader();
pixelShader = shaderObject->getPixelShader();
vertexShader = shaderObject->getVertexShader();
}
functionArray.push_back(Function(0, "main(", nullptr, nullptr));
currentFunction = 0;
outputQualifier = EvqOutput; // Initialize outputQualifier to any value other than EvqFragColor or EvqFragData
}
OutputASM::~OutputASM()
{
}
void OutputASM::output()
{
if(shader)
{
emitShader(GLOBAL);
if(functionArray.size() > 1) // Only call main() when there are other functions
{
Instruction *callMain = emit(sw::Shader::OPCODE_CALL);
callMain->dst.type = sw::Shader::PARAMETER_LABEL;
callMain->dst.index = 0; // main()
emit(sw::Shader::OPCODE_RET);
}
emitShader(FUNCTION);
}
}
void OutputASM::emitShader(Scope scope)
{
emitScope = scope;
currentScope = GLOBAL;
mContext.getTreeRoot()->traverse(this);
}
void OutputASM::freeTemporary(Temporary *temporary)
{
free(temporaries, temporary);
}
sw::Shader::Opcode OutputASM::getOpcode(sw::Shader::Opcode op, TIntermTyped *in) const
{
TBasicType baseType = in->getType().getBasicType();
switch(op)
{
case sw::Shader::OPCODE_NEG:
switch(baseType)
{
case EbtInt:
case EbtUInt:
return sw::Shader::OPCODE_INEG;
case EbtFloat:
default:
return op;
}
case sw::Shader::OPCODE_ABS:
switch(baseType)
{
case EbtInt:
return sw::Shader::OPCODE_IABS;
case EbtFloat:
default:
return op;
}
case sw::Shader::OPCODE_SGN:
switch(baseType)
{
case EbtInt:
return sw::Shader::OPCODE_ISGN;
case EbtFloat:
default:
return op;
}
case sw::Shader::OPCODE_ADD:
switch(baseType)
{
case EbtInt:
case EbtUInt:
return sw::Shader::OPCODE_IADD;
case EbtFloat:
default:
return op;
}
case sw::Shader::OPCODE_SUB:
switch(baseType)
{
case EbtInt:
case EbtUInt:
return sw::Shader::OPCODE_ISUB;
case EbtFloat:
default:
return op;
}
case sw::Shader::OPCODE_MUL:
switch(baseType)
{
case EbtInt:
case EbtUInt:
return sw::Shader::OPCODE_IMUL;
case EbtFloat:
default:
return op;
}
case sw::Shader::OPCODE_DIV:
switch(baseType)
{
case EbtInt:
return sw::Shader::OPCODE_IDIV;
case EbtUInt:
return sw::Shader::OPCODE_UDIV;
case EbtFloat:
default:
return op;
}
case sw::Shader::OPCODE_IMOD:
return baseType == EbtUInt ? sw::Shader::OPCODE_UMOD : op;
case sw::Shader::OPCODE_ISHR:
return baseType == EbtUInt ? sw::Shader::OPCODE_USHR : op;
case sw::Shader::OPCODE_MIN:
switch(baseType)
{
case EbtInt:
return sw::Shader::OPCODE_IMIN;
case EbtUInt:
return sw::Shader::OPCODE_UMIN;
case EbtFloat:
default:
return op;
}
case sw::Shader::OPCODE_MAX:
switch(baseType)
{
case EbtInt:
return sw::Shader::OPCODE_IMAX;
case EbtUInt:
return sw::Shader::OPCODE_UMAX;
case EbtFloat:
default:
return op;
}
default:
return op;
}
}
void OutputASM::visitSymbol(TIntermSymbol *symbol)
{
// The type of vertex outputs and fragment inputs with the same name must match (validated at link time),
// so declare them but don't assign a register index yet (one will be assigned when referenced in reachable code).
switch(symbol->getQualifier())
{
case EvqVaryingIn:
case EvqVaryingOut:
case EvqInvariantVaryingIn:
case EvqInvariantVaryingOut:
case EvqVertexOut:
case EvqFragmentIn:
if(symbol->getBasicType() != EbtInvariant) // Typeless declarations are not new varyings
{
declareVarying(symbol, -1);
}
break;
case EvqFragmentOut:
declareFragmentOutput(symbol);
break;
default:
break;
}
TInterfaceBlock* block = symbol->getType().getInterfaceBlock();
// OpenGL ES 3.0.4 spec, section 2.12.6 Uniform Variables:
// "All members of a named uniform block declared with a shared or std140 layout qualifier
// are considered active, even if they are not referenced in any shader in the program.
// The uniform block itself is also considered active, even if no member of the block is referenced."
if(block && ((block->blockStorage() == EbsShared) || (block->blockStorage() == EbsStd140)))
{
uniformRegister(symbol);
}
}
bool OutputASM::visitBinary(Visit visit, TIntermBinary *node)
{
if(currentScope != emitScope)
{
return false;
}
TIntermTyped *result = node;
TIntermTyped *left = node->getLeft();
TIntermTyped *right = node->getRight();
const TType &leftType = left->getType();
const TType &rightType = right->getType();
if(isSamplerRegister(result))
{
return false; // Don't traverse, the register index is determined statically
}
switch(node->getOp())
{
case EOpAssign:
assert(visit == PreVisit);
right->traverse(this);
assignLvalue(left, right);
copy(result, right);
return false;
case EOpInitialize:
assert(visit == PreVisit);
// Constant arrays go into the constant register file.
if(leftType.getQualifier() == EvqConstExpr && leftType.isArray() && leftType.getArraySize() > 1)
{
for(int i = 0; i < left->totalRegisterCount(); i++)
{
emit(sw::Shader::OPCODE_DEF, left, i, right, i);
}
}
else
{
right->traverse(this);
copy(left, right);
}
return false;
case EOpMatrixTimesScalarAssign:
assert(visit == PreVisit);
right->traverse(this);
for(int i = 0; i < leftType.getNominalSize(); i++)
{
emit(sw::Shader::OPCODE_MUL, result, i, left, i, right);
}
assignLvalue(left, result);
return false;
case EOpVectorTimesMatrixAssign:
assert(visit == PreVisit);
{
right->traverse(this);
int size = leftType.getNominalSize();
for(int i = 0; i < size; i++)
{
Instruction *dot = emit(sw::Shader::OPCODE_DP(size), result, 0, left, 0, right, i);
dot->dst.mask = 1 << i;
}
assignLvalue(left, result);
}
return false;
case EOpMatrixTimesMatrixAssign:
assert(visit == PreVisit);
{
right->traverse(this);
int dim = leftType.getNominalSize();
for(int i = 0; i < dim; i++)
{
Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, i, left, 0, right, i);
mul->src[1].swizzle = 0x00;
for(int j = 1; j < dim; j++)
{
Instruction *mad = emit(sw::Shader::OPCODE_MAD, result, i, left, j, right, i, result, i);
mad->src[1].swizzle = j * 0x55;
}
}
assignLvalue(left, result);
}
return false;
case EOpIndexDirect:
case EOpIndexIndirect:
case EOpIndexDirectStruct:
case EOpIndexDirectInterfaceBlock:
assert(visit == PreVisit);
evaluateRvalue(node);
return false;
case EOpVectorSwizzle:
if(visit == PostVisit)
{
int swizzle = 0;
TIntermAggregate *components = right->getAsAggregate();
if(components)
{
TIntermSequence &sequence = components->getSequence();
int component = 0;
for(TIntermSequence::iterator sit = sequence.begin(); sit != sequence.end(); sit++)
{
TIntermConstantUnion *element = (*sit)->getAsConstantUnion();
if(element)
{
int i = element->getUnionArrayPointer()[0].getIConst();
swizzle |= i << (component * 2);
component++;
}
else UNREACHABLE(0);
}
}
else UNREACHABLE(0);
Instruction *mov = emit(sw::Shader::OPCODE_MOV, result, left);
mov->src[0].swizzle = swizzle;
}
break;
case EOpAddAssign: if(visit == PostVisit) emitAssign(getOpcode(sw::Shader::OPCODE_ADD, result), result, left, left, right); break;
case EOpAdd: if(visit == PostVisit) emitBinary(getOpcode(sw::Shader::OPCODE_ADD, result), result, left, right); break;
case EOpSubAssign: if(visit == PostVisit) emitAssign(getOpcode(sw::Shader::OPCODE_SUB, result), result, left, left, right); break;
case EOpSub: if(visit == PostVisit) emitBinary(getOpcode(sw::Shader::OPCODE_SUB, result), result, left, right); break;
case EOpMulAssign: if(visit == PostVisit) emitAssign(getOpcode(sw::Shader::OPCODE_MUL, result), result, left, left, right); break;
case EOpMul: if(visit == PostVisit) emitBinary(getOpcode(sw::Shader::OPCODE_MUL, result), result, left, right); break;
case EOpDivAssign: if(visit == PostVisit) emitAssign(getOpcode(sw::Shader::OPCODE_DIV, result), result, left, left, right); break;
case EOpDiv: if(visit == PostVisit) emitBinary(getOpcode(sw::Shader::OPCODE_DIV, result), result, left, right); break;
case EOpIModAssign: if(visit == PostVisit) emitAssign(getOpcode(sw::Shader::OPCODE_IMOD, result), result, left, left, right); break;
case EOpIMod: if(visit == PostVisit) emitBinary(getOpcode(sw::Shader::OPCODE_IMOD, result), result, left, right); break;
case EOpBitShiftLeftAssign: if(visit == PostVisit) emitAssign(sw::Shader::OPCODE_SHL, result, left, left, right); break;
case EOpBitShiftLeft: if(visit == PostVisit) emitBinary(sw::Shader::OPCODE_SHL, result, left, right); break;
case EOpBitShiftRightAssign: if(visit == PostVisit) emitAssign(getOpcode(sw::Shader::OPCODE_ISHR, result), result, left, left, right); break;
case EOpBitShiftRight: if(visit == PostVisit) emitBinary(getOpcode(sw::Shader::OPCODE_ISHR, result), result, left, right); break;
case EOpBitwiseAndAssign: if(visit == PostVisit) emitAssign(sw::Shader::OPCODE_AND, result, left, left, right); break;
case EOpBitwiseAnd: if(visit == PostVisit) emitBinary(sw::Shader::OPCODE_AND, result, left, right); break;
case EOpBitwiseXorAssign: if(visit == PostVisit) emitAssign(sw::Shader::OPCODE_XOR, result, left, left, right); break;
case EOpBitwiseXor: if(visit == PostVisit) emitBinary(sw::Shader::OPCODE_XOR, result, left, right); break;
case EOpBitwiseOrAssign: if(visit == PostVisit) emitAssign(sw::Shader::OPCODE_OR, result, left, left, right); break;
case EOpBitwiseOr: if(visit == PostVisit) emitBinary(sw::Shader::OPCODE_OR, result, left, right); break;
case EOpEqual:
if(visit == PostVisit)
{
emitBinary(sw::Shader::OPCODE_EQ, result, left, right);
for(int index = 1; index < left->totalRegisterCount(); index++)
{
Temporary equal(this);
emit(sw::Shader::OPCODE_EQ, &equal, 0, left, index, right, index);
emit(sw::Shader::OPCODE_AND, result, result, &equal);
}
}
break;
case EOpNotEqual:
if(visit == PostVisit)
{
emitBinary(sw::Shader::OPCODE_NE, result, left, right);
for(int index = 1; index < left->totalRegisterCount(); index++)
{
Temporary notEqual(this);
emit(sw::Shader::OPCODE_NE, ¬Equal, 0, left, index, right, index);
emit(sw::Shader::OPCODE_OR, result, result, ¬Equal);
}
}
break;
case EOpLessThan: if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_LT, result, left, right); break;
case EOpGreaterThan: if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_GT, result, left, right); break;
case EOpLessThanEqual: if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_LE, result, left, right); break;
case EOpGreaterThanEqual: if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_GE, result, left, right); break;
case EOpVectorTimesScalarAssign: if(visit == PostVisit) emitAssign(getOpcode(sw::Shader::OPCODE_MUL, left), result, left, left, right); break;
case EOpVectorTimesScalar: if(visit == PostVisit) emit(getOpcode(sw::Shader::OPCODE_MUL, left), result, left, right); break;
case EOpMatrixTimesScalar:
if(visit == PostVisit)
{
if(left->isMatrix())
{
for(int i = 0; i < leftType.getNominalSize(); i++)
{
emit(sw::Shader::OPCODE_MUL, result, i, left, i, right, 0);
}
}
else if(right->isMatrix())
{
for(int i = 0; i < rightType.getNominalSize(); i++)
{
emit(sw::Shader::OPCODE_MUL, result, i, left, 0, right, i);
}
}
else UNREACHABLE(0);
}
break;
case EOpVectorTimesMatrix:
if(visit == PostVisit)
{
sw::Shader::Opcode dpOpcode = sw::Shader::OPCODE_DP(leftType.getNominalSize());
int size = rightType.getNominalSize();
for(int i = 0; i < size; i++)
{
Instruction *dot = emit(dpOpcode, result, 0, left, 0, right, i);
dot->dst.mask = 1 << i;
}
}
break;
case EOpMatrixTimesVector:
if(visit == PostVisit)
{
Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, left, right);
mul->src[1].swizzle = 0x00;
int size = rightType.getNominalSize();
for(int i = 1; i < size; i++)
{
Instruction *mad = emit(sw::Shader::OPCODE_MAD, result, 0, left, i, right, 0, result);
mad->src[1].swizzle = i * 0x55;
}
}
break;
case EOpMatrixTimesMatrix:
if(visit == PostVisit)
{
int dim = leftType.getNominalSize();
int size = rightType.getNominalSize();
for(int i = 0; i < size; i++)
{
Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, i, left, 0, right, i);
mul->src[1].swizzle = 0x00;
for(int j = 1; j < dim; j++)
{
Instruction *mad = emit(sw::Shader::OPCODE_MAD, result, i, left, j, right, i, result, i);
mad->src[1].swizzle = j * 0x55;
}
}
}
break;
case EOpLogicalOr:
if(trivial(right, 6))
{
if(visit == PostVisit)
{
emit(sw::Shader::OPCODE_OR, result, left, right);
}
}
else // Short-circuit evaluation
{
if(visit == InVisit)
{
emit(sw::Shader::OPCODE_MOV, result, left);
Instruction *ifnot = emit(sw::Shader::OPCODE_IF, 0, result);
ifnot->src[0].modifier = sw::Shader::MODIFIER_NOT;
}
else if(visit == PostVisit)
{
emit(sw::Shader::OPCODE_MOV, result, right);
emit(sw::Shader::OPCODE_ENDIF);
}
}
break;
case EOpLogicalXor: if(visit == PostVisit) emit(sw::Shader::OPCODE_XOR, result, left, right); break;
case EOpLogicalAnd:
if(trivial(right, 6))
{
if(visit == PostVisit)
{
emit(sw::Shader::OPCODE_AND, result, left, right);
}
}
else // Short-circuit evaluation
{
if(visit == InVisit)
{
emit(sw::Shader::OPCODE_MOV, result, left);
emit(sw::Shader::OPCODE_IF, 0, result);
}
else if(visit == PostVisit)
{
emit(sw::Shader::OPCODE_MOV, result, right);
emit(sw::Shader::OPCODE_ENDIF);
}
}
break;
default: UNREACHABLE(node->getOp());
}
return true;
}
void OutputASM::emitDeterminant(TIntermTyped *result, TIntermTyped *arg, int size, int col, int row, int outCol, int outRow)
{
switch(size)
{
case 1: // Used for cofactor computation only
{
// For a 2x2 matrix, the cofactor is simply a transposed move or negate
bool isMov = (row == col);
sw::Shader::Opcode op = isMov ? sw::Shader::OPCODE_MOV : sw::Shader::OPCODE_NEG;
Instruction *mov = emit(op, result, outCol, arg, isMov ? 1 - row : row);
mov->src[0].swizzle = 0x55 * (isMov ? 1 - col : col);
mov->dst.mask = 1 << outRow;
}
break;
case 2:
{
static const unsigned int swizzle[3] = { 0x99, 0x88, 0x44 }; // xy?? : yzyz, xzxz, xyxy
bool isCofactor = (col >= 0) && (row >= 0);
int col0 = (isCofactor && (col <= 0)) ? 1 : 0;
int col1 = (isCofactor && (col <= 1)) ? 2 : 1;
bool negate = isCofactor && ((col & 0x01) ^ (row & 0x01));
Instruction *det = emit(sw::Shader::OPCODE_DET2, result, outCol, arg, negate ? col1 : col0, arg, negate ? col0 : col1);
det->src[0].swizzle = det->src[1].swizzle = swizzle[isCofactor ? row : 2];
det->dst.mask = 1 << outRow;
}
break;
case 3:
{
static const unsigned int swizzle[4] = { 0xF9, 0xF8, 0xF4, 0xE4 }; // xyz? : yzww, xzww, xyww, xyzw
bool isCofactor = (col >= 0) && (row >= 0);
int col0 = (isCofactor && (col <= 0)) ? 1 : 0;
int col1 = (isCofactor && (col <= 1)) ? 2 : 1;
int col2 = (isCofactor && (col <= 2)) ? 3 : 2;
bool negate = isCofactor && ((col & 0x01) ^ (row & 0x01));
Instruction *det = emit(sw::Shader::OPCODE_DET3, result, outCol, arg, col0, arg, negate ? col2 : col1, arg, negate ? col1 : col2);
det->src[0].swizzle = det->src[1].swizzle = det->src[2].swizzle = swizzle[isCofactor ? row : 3];
det->dst.mask = 1 << outRow;
}
break;
case 4:
{
Instruction *det = emit(sw::Shader::OPCODE_DET4, result, outCol, arg, 0, arg, 1, arg, 2, arg, 3);
det->dst.mask = 1 << outRow;
}
break;
default:
UNREACHABLE(size);
break;
}
}
bool OutputASM::visitUnary(Visit visit, TIntermUnary *node)
{
if(currentScope != emitScope)
{
return false;
}
TIntermTyped *result = node;
TIntermTyped *arg = node->getOperand();
TBasicType basicType = arg->getType().getBasicType();
union
{
float f;
int i;
} one_value;
if(basicType == EbtInt || basicType == EbtUInt)
{
one_value.i = 1;
}
else
{
one_value.f = 1.0f;
}
Constant one(one_value.f, one_value.f, one_value.f, one_value.f);
Constant rad(1.74532925e-2f, 1.74532925e-2f, 1.74532925e-2f, 1.74532925e-2f);
Constant deg(5.72957795e+1f, 5.72957795e+1f, 5.72957795e+1f, 5.72957795e+1f);
switch(node->getOp())
{
case EOpNegative:
if(visit == PostVisit)
{
sw::Shader::Opcode negOpcode = getOpcode(sw::Shader::OPCODE_NEG, arg);
for(int index = 0; index < arg->totalRegisterCount(); index++)
{
emit(negOpcode, result, index, arg, index);
}
}
break;
case EOpVectorLogicalNot: if(visit == PostVisit) emit(sw::Shader::OPCODE_NOT, result, arg); break;
case EOpLogicalNot: if(visit == PostVisit) emit(sw::Shader::OPCODE_NOT, result, arg); break;
case EOpBitwiseNot: if(visit == PostVisit) emit(sw::Shader::OPCODE_NOT, result, arg); break;
case EOpPostIncrement:
if(visit == PostVisit)
{
copy(result, arg);
sw::Shader::Opcode addOpcode = getOpcode(sw::Shader::OPCODE_ADD, arg);
for(int index = 0; index < arg->totalRegisterCount(); index++)
{
emit(addOpcode, arg, index, arg, index, &one);
}
assignLvalue(arg, arg);
}
break;
case EOpPostDecrement:
if(visit == PostVisit)
{
copy(result, arg);
sw::Shader::Opcode subOpcode = getOpcode(sw::Shader::OPCODE_SUB, arg);
for(int index = 0; index < arg->totalRegisterCount(); index++)
{
emit(subOpcode, arg, index, arg, index, &one);
}
assignLvalue(arg, arg);
}
break;
case EOpPreIncrement:
if(visit == PostVisit)
{
sw::Shader::Opcode addOpcode = getOpcode(sw::Shader::OPCODE_ADD, arg);
for(int index = 0; index < arg->totalRegisterCount(); index++)
{
emit(addOpcode, result, index, arg, index, &one);
}
assignLvalue(arg, result);
}
break;
case EOpPreDecrement:
if(visit == PostVisit)
{
sw::Shader::Opcode subOpcode = getOpcode(sw::Shader::OPCODE_SUB, arg);
for(int index = 0; index < arg->totalRegisterCount(); index++)
{
emit(subOpcode, result, index, arg, index, &one);
}
assignLvalue(arg, result);
}
break;
case EOpRadians: if(visit == PostVisit) emit(sw::Shader::OPCODE_MUL, result, arg, &rad); break;
case EOpDegrees: if(visit == PostVisit) emit(sw::Shader::OPCODE_MUL, result, arg, °); break;
case EOpSin: if(visit == PostVisit) emit(sw::Shader::OPCODE_SIN, result, arg); break;
case EOpCos: if(visit == PostVisit) emit(sw::Shader::OPCODE_COS, result, arg); break;
case EOpTan: if(visit == PostVisit) emit(sw::Shader::OPCODE_TAN, result, arg); break;
case EOpAsin: if(visit == PostVisit) emit(sw::Shader::OPCODE_ASIN, result, arg); break;
case EOpAcos: if(visit == PostVisit) emit(sw::Shader::OPCODE_ACOS, result, arg); break;
case EOpAtan: if(visit == PostVisit) emit(sw::Shader::OPCODE_ATAN, result, arg); break;
case EOpSinh: if(visit == PostVisit) emit(sw::Shader::OPCODE_SINH, result, arg); break;
case EOpCosh: if(visit == PostVisit) emit(sw::Shader::OPCODE_COSH, result, arg); break;
case EOpTanh: if(visit == PostVisit) emit(sw::Shader::OPCODE_TANH, result, arg); break;
case EOpAsinh: if(visit == PostVisit) emit(sw::Shader::OPCODE_ASINH, result, arg); break;
case EOpAcosh: if(visit == PostVisit) emit(sw::Shader::OPCODE_ACOSH, result, arg); break;
case EOpAtanh: if(visit == PostVisit) emit(sw::Shader::OPCODE_ATANH, result, arg); break;
case EOpExp: if(visit == PostVisit) emit(sw::Shader::OPCODE_EXP, result, arg); break;
case EOpLog: if(visit == PostVisit) emit(sw::Shader::OPCODE_LOG, result, arg); break;
case EOpExp2: if(visit == PostVisit) emit(sw::Shader::OPCODE_EXP2, result, arg); break;
case EOpLog2: if(visit == PostVisit) emit(sw::Shader::OPCODE_LOG2, result, arg); break;
case EOpSqrt: if(visit == PostVisit) emit(sw::Shader::OPCODE_SQRT, result, arg); break;
case EOpInverseSqrt: if(visit == PostVisit) emit(sw::Shader::OPCODE_RSQ, result, arg); break;
case EOpAbs: if(visit == PostVisit) emit(getOpcode(sw::Shader::OPCODE_ABS, result), result, arg); break;
case EOpSign: if(visit == PostVisit) emit(getOpcode(sw::Shader::OPCODE_SGN, result), result, arg); break;
case EOpFloor: if(visit == PostVisit) emit(sw::Shader::OPCODE_FLOOR, result, arg); break;
case EOpTrunc: if(visit == PostVisit) emit(sw::Shader::OPCODE_TRUNC, result, arg); break;
case EOpRound: if(visit == PostVisit) emit(sw::Shader::OPCODE_ROUND, result, arg); break;
case EOpRoundEven: if(visit == PostVisit) emit(sw::Shader::OPCODE_ROUNDEVEN, result, arg); break;
case EOpCeil: if(visit == PostVisit) emit(sw::Shader::OPCODE_CEIL, result, arg, result); break;
case EOpFract: if(visit == PostVisit) emit(sw::Shader::OPCODE_FRC, result, arg); break;
case EOpIsNan: if(visit == PostVisit) emit(sw::Shader::OPCODE_ISNAN, result, arg); break;
case EOpIsInf: if(visit == PostVisit) emit(sw::Shader::OPCODE_ISINF, result, arg); break;
case EOpLength: if(visit == PostVisit) emit(sw::Shader::OPCODE_LEN(dim(arg)), result, arg); break;
case EOpNormalize: if(visit == PostVisit) emit(sw::Shader::OPCODE_NRM(dim(arg)), result, arg); break;
case EOpDFdx: if(visit == PostVisit) emit(sw::Shader::OPCODE_DFDX, result, arg); break;
case EOpDFdy: if(visit == PostVisit) emit(sw::Shader::OPCODE_DFDY, result, arg); break;
case EOpFwidth: if(visit == PostVisit) emit(sw::Shader::OPCODE_FWIDTH, result, arg); break;
case EOpAny: if(visit == PostVisit) emit(sw::Shader::OPCODE_ANY, result, arg); break;
case EOpAll: if(visit == PostVisit) emit(sw::Shader::OPCODE_ALL, result, arg); break;
case EOpFloatBitsToInt: if(visit == PostVisit) emit(sw::Shader::OPCODE_FLOATBITSTOINT, result, arg); break;
case EOpFloatBitsToUint: if(visit == PostVisit) emit(sw::Shader::OPCODE_FLOATBITSTOUINT, result, arg); break;
case EOpIntBitsToFloat: if(visit == PostVisit) emit(sw::Shader::OPCODE_INTBITSTOFLOAT, result, arg); break;
case EOpUintBitsToFloat: if(visit == PostVisit) emit(sw::Shader::OPCODE_UINTBITSTOFLOAT, result, arg); break;
case EOpPackSnorm2x16: if(visit == PostVisit) emit(sw::Shader::OPCODE_PACKSNORM2x16, result, arg); break;
case EOpPackUnorm2x16: if(visit == PostVisit) emit(sw::Shader::OPCODE_PACKUNORM2x16, result, arg); break;
case EOpPackHalf2x16: if(visit == PostVisit) emit(sw::Shader::OPCODE_PACKHALF2x16, result, arg); break;
case EOpUnpackSnorm2x16: if(visit == PostVisit) emit(sw::Shader::OPCODE_UNPACKSNORM2x16, result, arg); break;
case EOpUnpackUnorm2x16: if(visit == PostVisit) emit(sw::Shader::OPCODE_UNPACKUNORM2x16, result, arg); break;
case EOpUnpackHalf2x16: if(visit == PostVisit) emit(sw::Shader::OPCODE_UNPACKHALF2x16, result, arg); break;
case EOpTranspose:
if(visit == PostVisit)
{
int numCols = arg->getNominalSize();
int numRows = arg->getSecondarySize();
for(int i = 0; i < numCols; ++i)
{
for(int j = 0; j < numRows; ++j)
{
Instruction *mov = emit(sw::Shader::OPCODE_MOV, result, j, arg, i);
mov->src[0].swizzle = 0x55 * j;
mov->dst.mask = 1 << i;
}
}
}
break;
case EOpDeterminant:
if(visit == PostVisit)
{
int size = arg->getNominalSize();
ASSERT(size == arg->getSecondarySize());
emitDeterminant(result, arg, size);
}
break;
case EOpInverse:
if(visit == PostVisit)
{
int size = arg->getNominalSize();
ASSERT(size == arg->getSecondarySize());
// Compute transposed matrix of cofactors
for(int i = 0; i < size; ++i)
{
for(int j = 0; j < size; ++j)
{
// For a 2x2 matrix, the cofactor is simply a transposed move or negate
// For a 3x3 or 4x4 matrix, the cofactor is a transposed determinant
emitDeterminant(result, arg, size - 1, j, i, i, j);
}
}
// Compute 1 / determinant
Temporary invDet(this);
emitDeterminant(&invDet, arg, size);
Constant one(1.0f, 1.0f, 1.0f, 1.0f);
Instruction *div = emit(sw::Shader::OPCODE_DIV, &invDet, &one, &invDet);
div->src[1].swizzle = 0x00; // xxxx
// Divide transposed matrix of cofactors by determinant
for(int i = 0; i < size; ++i)
{
emit(sw::Shader::OPCODE_MUL, result, i, result, i, &invDet);
}
}
break;
default: UNREACHABLE(node->getOp());
}
return true;
}
bool OutputASM::visitAggregate(Visit visit, TIntermAggregate *node)
{
if(currentScope != emitScope && node->getOp() != EOpFunction && node->getOp() != EOpSequence)
{
return false;
}
Constant zero(0.0f, 0.0f, 0.0f, 0.0f);
TIntermTyped *result = node;
const TType &resultType = node->getType();
TIntermSequence &arg = node->getSequence();
size_t argumentCount = arg.size();
switch(node->getOp())
{
case EOpSequence: break;
case EOpDeclaration: break;
case EOpInvariantDeclaration: break;
case EOpPrototype: break;
case EOpComma:
if(visit == PostVisit)
{
copy(result, arg[1]);
}
break;
case EOpFunction:
if(visit == PreVisit)
{
const TString &name = node->getName();
if(emitScope == FUNCTION)
{
if(functionArray.size() > 1) // No need for a label when there's only main()
{
Instruction *label = emit(sw::Shader::OPCODE_LABEL);
label->dst.type = sw::Shader::PARAMETER_LABEL;
const Function *function = findFunction(name);
ASSERT(function); // Should have been added during global pass
label->dst.index = function->label;
currentFunction = function->label;
}
}
else if(emitScope == GLOBAL)
{
if(name != "main(")
{
TIntermSequence &arguments = node->getSequence()[0]->getAsAggregate()->getSequence();
functionArray.push_back(Function(functionArray.size(), name, &arguments, node));
}
}
else UNREACHABLE(emitScope);
currentScope = FUNCTION;
}
else if(visit == PostVisit)
{
if(emitScope == FUNCTION)
{
if(functionArray.size() > 1) // No need to return when there's only main()
{
emit(sw::Shader::OPCODE_RET);
}
}
currentScope = GLOBAL;
}
break;
case EOpFunctionCall:
if(visit == PostVisit)
{
if(node->isUserDefined())
{
const TString &name = node->getName();
const Function *function = findFunction(name);
if(!function)
{
mContext.error(node->getLine(), "function definition not found", name.c_str());
return false;
}
TIntermSequence &arguments = *function->arg;
for(size_t i = 0; i < argumentCount; i++)
{
TIntermTyped *in = arguments[i]->getAsTyped();
if(in->getQualifier() == EvqIn ||
in->getQualifier() == EvqInOut ||
in->getQualifier() == EvqConstReadOnly)
{
copy(in, arg[i]);
}
}
Instruction *call = emit(sw::Shader::OPCODE_CALL);
call->dst.type = sw::Shader::PARAMETER_LABEL;
call->dst.index = function->label;
if(function->ret && function->ret->getType().getBasicType() != EbtVoid)
{
copy(result, function->ret);
}
for(size_t i = 0; i < argumentCount; i++)
{
TIntermTyped *argument = arguments[i]->getAsTyped();
TIntermTyped *out = arg[i]->getAsTyped();
if(argument->getQualifier() == EvqOut ||
argument->getQualifier() == EvqInOut)
{
assignLvalue(out, argument);
}
}
}
else
{
const TextureFunction textureFunction(node->getName());
TIntermTyped *s = arg[0]->getAsTyped();
TIntermTyped *t = arg[1]->getAsTyped();
Temporary coord(this);
if(textureFunction.proj)
{
Instruction *rcp = emit(sw::Shader::OPCODE_RCPX, &coord, arg[1]);
rcp->src[0].swizzle = 0x55 * (t->getNominalSize() - 1);
rcp->dst.mask = 0x7;
Instruction *mul = emit(sw::Shader::OPCODE_MUL, &coord, arg[1], &coord);
mul->dst.mask = 0x7;
if(IsShadowSampler(s->getBasicType()))
{
ASSERT(s->getBasicType() == EbtSampler2DShadow);
Instruction *mov = emit(sw::Shader::OPCODE_MOV, &coord, &coord);
mov->src[0].swizzle = 0xA4;
}
}
else
{
Instruction *mov = emit(sw::Shader::OPCODE_MOV, &coord, arg[1]);
if(IsShadowSampler(s->getBasicType()) && t->getNominalSize() == 3)
{
ASSERT(s->getBasicType() == EbtSampler2DShadow);
mov->src[0].swizzle = 0xA4;
}
}
switch(textureFunction.method)
{
case TextureFunction::IMPLICIT:
if(!textureFunction.offset)
{
if(argumentCount == 2)
{
emit(sw::Shader::OPCODE_TEX, result, &coord, s);
}
else if(argumentCount == 3) // Bias
{
emit(sw::Shader::OPCODE_TEXBIAS, result, &coord, s, arg[2]);
}
else UNREACHABLE(argumentCount);
}
else // Offset
{
if(argumentCount == 3)
{
emit(sw::Shader::OPCODE_TEXOFFSET, result, &coord, s, arg[2]);
}
else if(argumentCount == 4) // Bias
{
emit(sw::Shader::OPCODE_TEXOFFSETBIAS, result, &coord, s, arg[2], arg[3]);
}
else UNREACHABLE(argumentCount);
}
break;
case TextureFunction::LOD:
if(!textureFunction.offset && argumentCount == 3)
{
emit(sw::Shader::OPCODE_TEXLOD, result, &coord, s, arg[2]);
}
else if(argumentCount == 4) // Offset
{
emit(sw::Shader::OPCODE_TEXLODOFFSET, result, &coord, s, arg[3], arg[2]);
}
else UNREACHABLE(argumentCount);
break;
case TextureFunction::FETCH:
if(!textureFunction.offset && argumentCount == 3)
{
emit(sw::Shader::OPCODE_TEXELFETCH, result, &coord, s, arg[2]);
}
else if(argumentCount == 4) // Offset
{
emit(sw::Shader::OPCODE_TEXELFETCHOFFSET, result, &coord, s, arg[3], arg[2]);
}
else UNREACHABLE(argumentCount);
break;
case TextureFunction::GRAD:
if(!textureFunction.offset && argumentCount == 4)
{
emit(sw::Shader::OPCODE_TEXGRAD, result, &coord, s, arg[2], arg[3]);
}
else if(argumentCount == 5) // Offset
{
emit(sw::Shader::OPCODE_TEXGRADOFFSET, result, &coord, s, arg[2], arg[3], arg[4]);
}
else UNREACHABLE(argumentCount);
break;
case TextureFunction::SIZE:
emit(sw::Shader::OPCODE_TEXSIZE, result, arg[1], s);
break;
default:
UNREACHABLE(textureFunction.method);
}
}
}
break;
case EOpParameters:
break;
case EOpConstructFloat:
case EOpConstructVec2:
case EOpConstructVec3:
case EOpConstructVec4:
case EOpConstructBool:
case EOpConstructBVec2:
case EOpConstructBVec3:
case EOpConstructBVec4:
case EOpConstructInt:
case EOpConstructIVec2:
case EOpConstructIVec3:
case EOpConstructIVec4:
case EOpConstructUInt:
case EOpConstructUVec2:
case EOpConstructUVec3:
case EOpConstructUVec4:
if(visit == PostVisit)
{
int component = 0;
int arrayMaxIndex = result->isArray() ? result->getArraySize() - 1 : 0;
int arrayComponents = result->getType().getElementSize();
for(size_t i = 0; i < argumentCount; i++)
{
TIntermTyped *argi = arg[i]->getAsTyped();
int size = argi->getNominalSize();
int arrayIndex = std::min(component / arrayComponents, arrayMaxIndex);
int swizzle = component - (arrayIndex * arrayComponents);
if(!argi->isMatrix())
{
Instruction *mov = emitCast(result, arrayIndex, argi, 0);
mov->dst.mask = (0xF << swizzle) & 0xF;
mov->src[0].swizzle = readSwizzle(argi, size) << (swizzle * 2);
component += size;
}
else if(!result->isMatrix()) // Construct a non matrix from a matrix
{
Instruction *mov = emitCast(result, arrayIndex, argi, 0);
mov->dst.mask = (0xF << swizzle) & 0xF;
mov->src[0].swizzle = readSwizzle(argi, size) << (swizzle * 2);
// At most one more instruction when constructing a vec3 from a mat2 or a vec4 from a mat2/mat3
if(result->getNominalSize() > size)
{
Instruction *mov = emitCast(result, arrayIndex, argi, 1);
mov->dst.mask = (0xF << (swizzle + size)) & 0xF;
// mat2: xxxy (0x40), mat3: xxxx (0x00)
mov->src[0].swizzle = ((size == 2) ? 0x40 : 0x00) << (swizzle * 2);
}
component += size;
}
else // Matrix
{
int column = 0;
while(component < resultType.getNominalSize())
{
Instruction *mov = emitCast(result, arrayIndex, argi, column);
mov->dst.mask = (0xF << swizzle) & 0xF;
mov->src[0].swizzle = readSwizzle(argi, size) << (swizzle * 2);
column++;
component += size;
}
}
}
}
break;
case EOpConstructMat2:
case EOpConstructMat2x3:
case EOpConstructMat2x4:
case EOpConstructMat3x2:
case EOpConstructMat3:
case EOpConstructMat3x4:
case EOpConstructMat4x2:
case EOpConstructMat4x3:
case EOpConstructMat4:
if(visit == PostVisit)
{
TIntermTyped *arg0 = arg[0]->getAsTyped();
const int outCols = result->getNominalSize();
const int outRows = result->getSecondarySize();
if(arg0->isScalar() && arg.size() == 1) // Construct scale matrix
{
for(int i = 0; i < outCols; i++)
{
emit(sw::Shader::OPCODE_MOV, result, i, &zero);
Instruction *mov = emitCast(result, i, arg0, 0);
mov->dst.mask = 1 << i;
ASSERT(mov->src[0].swizzle == 0x00);
}
}
else if(arg0->isMatrix())
{
int arraySize = result->isArray() ? result->getArraySize() : 1;
for(int n = 0; n < arraySize; n++)
{
TIntermTyped *argi = arg[n]->getAsTyped();
const int inCols = argi->getNominalSize();
const int inRows = argi->getSecondarySize();
for(int i = 0; i < outCols; i++)
{
if(i >= inCols || outRows > inRows)
{
// Initialize to identity matrix
Constant col((i == 0 ? 1.0f : 0.0f), (i == 1 ? 1.0f : 0.0f), (i == 2 ? 1.0f : 0.0f), (i == 3 ? 1.0f : 0.0f));
emitCast(result, i + n * outCols, &col, 0);
}
if(i < inCols)
{
Instruction *mov = emitCast(result, i + n * outCols, argi, i);
mov->dst.mask = 0xF >> (4 - inRows);
}
}
}
}
else
{
int column = 0;
int row = 0;
for(size_t i = 0; i < argumentCount; i++)
{
TIntermTyped *argi = arg[i]->getAsTyped();
int size = argi->getNominalSize();
int element = 0;
while(element < size)
{
Instruction *mov = emitCast(result, column, argi, 0);
mov->dst.mask = (0xF << row) & 0xF;
mov->src[0].swizzle = (readSwizzle(argi, size) << (row * 2)) + 0x55 * element;
int end = row + size - element;
column = end >= outRows ? column + 1 : column;
element = element + outRows - row;
row = end >= outRows ? 0 : end;
}
}
}
}
break;
case EOpConstructStruct:
if(visit == PostVisit)
{
int offset = 0;
for(size_t i = 0; i < argumentCount; i++)
{
TIntermTyped *argi = arg[i]->getAsTyped();
int size = argi->totalRegisterCount();
for(int index = 0; index < size; index++)
{
Instruction *mov = emit(sw::Shader::OPCODE_MOV, result, index + offset, argi, index);
mov->dst.mask = writeMask(result, offset + index);
}
offset += size;
}
}
break;
case EOpLessThan: if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_LT, result, arg[0], arg[1]); break;
case EOpGreaterThan: if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_GT, result, arg[0], arg[1]); break;
case EOpLessThanEqual: if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_LE, result, arg[0], arg[1]); break;
case EOpGreaterThanEqual: if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_GE, result, arg[0], arg[1]); break;
case EOpVectorEqual: if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_EQ, result, arg[0], arg[1]); break;
case EOpVectorNotEqual: if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_NE, result, arg[0], arg[1]); break;
case EOpMod: if(visit == PostVisit) emit(sw::Shader::OPCODE_MOD, result, arg[0], arg[1]); break;
case EOpModf:
if(visit == PostVisit)
{
TIntermTyped* arg1 = arg[1]->getAsTyped();
emit(sw::Shader::OPCODE_TRUNC, arg1, arg[0]);
assignLvalue(arg1, arg1);
emitBinary(sw::Shader::OPCODE_SUB, result, arg[0], arg1);
}
break;
case EOpPow: if(visit == PostVisit) emit(sw::Shader::OPCODE_POW, result, arg[0], arg[1]); break;
case EOpAtan: if(visit == PostVisit) emit(sw::Shader::OPCODE_ATAN2, result, arg[0], arg[1]); break;
case EOpMin: if(visit == PostVisit) emit(getOpcode(sw::Shader::OPCODE_MIN, result), result, arg[0], arg[1]); break;
case EOpMax: if(visit == PostVisit) emit(getOpcode(sw::Shader::OPCODE_MAX, result), result, arg[0], arg[1]); break;
case EOpClamp:
if(visit == PostVisit)
{
emit(getOpcode(sw::Shader::OPCODE_MAX, result), result, arg[0], arg[1]);
emit(getOpcode(sw::Shader::OPCODE_MIN, result), result, result, arg[2]);
}
break;
case EOpMix:
if(visit == PostVisit)
{
if(arg[2]->getAsTyped()->getBasicType() == EbtBool)
{
emit(sw::Shader::OPCODE_SELECT, result, arg[2], arg[1], arg[0]);
}
else
{
emit(sw::Shader::OPCODE_LRP, result, arg[2], arg[1], arg[0]);
}
}
break;
case EOpStep: if(visit == PostVisit) emit(sw::Shader::OPCODE_STEP, result, arg[0], arg[1]); break;
case EOpSmoothStep: if(visit == PostVisit) emit(sw::Shader::OPCODE_SMOOTH, result, arg[0], arg[1], arg[2]); break;
case EOpDistance: if(visit == PostVisit) emit(sw::Shader::OPCODE_DIST(dim(arg[0])), result, arg[0], arg[1]); break;
case EOpDot: if(visit == PostVisit) emit(sw::Shader::OPCODE_DP(dim(arg[0])), result, arg[0], arg[1]); break;
case EOpCross: if(visit == PostVisit) emit(sw::Shader::OPCODE_CRS, result, arg[0], arg[1]); break;
case EOpFaceForward: if(visit == PostVisit) emit(sw::Shader::OPCODE_FORWARD(dim(arg[0])), result, arg[0], arg[1], arg[2]); break;
case EOpReflect: if(visit == PostVisit) emit(sw::Shader::OPCODE_REFLECT(dim(arg[0])), result, arg[0], arg[1]); break;
case EOpRefract: if(visit == PostVisit) emit(sw::Shader::OPCODE_REFRACT(dim(arg[0])), result, arg[0], arg[1], arg[2]); break;
case EOpMul:
if(visit == PostVisit)
{
TIntermTyped *arg0 = arg[0]->getAsTyped();
ASSERT((arg0->getNominalSize() == arg[1]->getAsTyped()->getNominalSize()) &&
(arg0->getSecondarySize() == arg[1]->getAsTyped()->getSecondarySize()));
int size = arg0->getNominalSize();
for(int i = 0; i < size; i++)
{
emit(sw::Shader::OPCODE_MUL, result, i, arg[0], i, arg[1], i);
}
}
break;
case EOpOuterProduct:
if(visit == PostVisit)
{
for(int i = 0; i < dim(arg[1]); i++)
{
Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, i, arg[0], 0, arg[1]);
mul->src[1].swizzle = 0x55 * i;
}
}
break;
default: UNREACHABLE(node->getOp());
}
return true;
}
bool OutputASM::visitSelection(Visit visit, TIntermSelection *node)
{
if(currentScope != emitScope)
{
return false;
}
TIntermTyped *condition = node->getCondition();
TIntermNode *trueBlock = node->getTrueBlock();
TIntermNode *falseBlock = node->getFalseBlock();
TIntermConstantUnion *constantCondition = condition->getAsConstantUnion();
condition->traverse(this);
if(node->usesTernaryOperator())
{
if(constantCondition)
{
bool trueCondition = constantCondition->getUnionArrayPointer()->getBConst();
if(trueCondition)
{
trueBlock->traverse(this);
copy(node, trueBlock);
}
else
{
falseBlock->traverse(this);
copy(node, falseBlock);
}
}
else if(trivial(node, 6)) // Fast to compute both potential results and no side effects
{
trueBlock->traverse(this);
falseBlock->traverse(this);
emit(sw::Shader::OPCODE_SELECT, node, condition, trueBlock, falseBlock);
}
else
{
emit(sw::Shader::OPCODE_IF, 0, condition);
if(trueBlock)
{
trueBlock->traverse(this);
copy(node, trueBlock);
}
if(falseBlock)
{
emit(sw::Shader::OPCODE_ELSE);
falseBlock->traverse(this);
copy(node, falseBlock);
}
emit(sw::Shader::OPCODE_ENDIF);
}
}
else // if/else statement
{
if(constantCondition)
{
bool trueCondition = constantCondition->getUnionArrayPointer()->getBConst();
if(trueCondition)
{
if(trueBlock)
{
trueBlock->traverse(this);
}
}
else
{
if(falseBlock)
{
falseBlock->traverse(this);
}
}
}
else
{
emit(sw::Shader::OPCODE_IF, 0, condition);
if(trueBlock)
{
trueBlock->traverse(this);
}
if(falseBlock)
{
emit(sw::Shader::OPCODE_ELSE);
falseBlock->traverse(this);
}
emit(sw::Shader::OPCODE_ENDIF);
}
}
return false;
}
bool OutputASM::visitLoop(Visit visit, TIntermLoop *node)
{
if(currentScope != emitScope)
{
return false;
}
unsigned int iterations = loopCount(node);
if(iterations == 0)
{
return false;
}
bool unroll = (iterations <= 4);
if(unroll)
{
LoopUnrollable loopUnrollable;
unroll = loopUnrollable.traverse(node);
}
TIntermNode *init = node->getInit();
TIntermTyped *condition = node->getCondition();
TIntermTyped *expression = node->getExpression();
TIntermNode *body = node->getBody();
Constant True(true);
if(node->getType() == ELoopDoWhile)
{
Temporary iterate(this);
emit(sw::Shader::OPCODE_MOV, &iterate, &True);
emit(sw::Shader::OPCODE_WHILE, 0, &iterate); // FIXME: Implement real do-while
if(body)
{
body->traverse(this);
}
emit(sw::Shader::OPCODE_TEST);
condition->traverse(this);
emit(sw::Shader::OPCODE_MOV, &iterate, condition);
emit(sw::Shader::OPCODE_ENDWHILE);
}
else
{
if(init)
{
init->traverse(this);
}
if(unroll)
{
for(unsigned int i = 0; i < iterations; i++)
{
// condition->traverse(this); // Condition could contain statements, but not in an unrollable loop
if(body)
{
body->traverse(this);
}
if(expression)
{
expression->traverse(this);
}
}
}
else
{
if(condition)
{
condition->traverse(this);
}
else
{
condition = &True;
}
emit(sw::Shader::OPCODE_WHILE, 0, condition);
if(body)
{
body->traverse(this);
}
emit(sw::Shader::OPCODE_TEST);
if(expression)
{
expression->traverse(this);
}
if(condition)
{
condition->traverse(this);
}
emit(sw::Shader::OPCODE_ENDWHILE);
}
}
return false;
}
bool OutputASM::visitBranch(Visit visit, TIntermBranch *node)
{
if(currentScope != emitScope)
{
return false;
}
switch(node->getFlowOp())
{
case EOpKill: if(visit == PostVisit) emit(sw::Shader::OPCODE_DISCARD); break;
case EOpBreak: if(visit == PostVisit) emit(sw::Shader::OPCODE_BREAK); break;
case EOpContinue: if(visit == PostVisit) emit(sw::Shader::OPCODE_CONTINUE); break;
case EOpReturn:
if(visit == PostVisit)
{
TIntermTyped *value = node->getExpression();
if(value)
{
copy(functionArray[currentFunction].ret, value);
}
emit(sw::Shader::OPCODE_LEAVE);
}
break;
default: UNREACHABLE(node->getFlowOp());
}
return true;
}
bool OutputASM::visitSwitch(Visit visit, TIntermSwitch *node)
{
if(currentScope != emitScope)
{
return false;
}
TIntermTyped* switchValue = node->getInit();
TIntermAggregate* opList = node->getStatementList();
if(!switchValue || !opList)
{
return false;
}
switchValue->traverse(this);
emit(sw::Shader::OPCODE_SWITCH);
TIntermSequence& sequence = opList->getSequence();
TIntermSequence::iterator it = sequence.begin();
TIntermSequence::iterator defaultIt = sequence.end();
int nbCases = 0;
for(; it != sequence.end(); ++it)
{
TIntermCase* currentCase = (*it)->getAsCaseNode();
if(currentCase)
{
TIntermSequence::iterator caseIt = it;
TIntermTyped* condition = currentCase->getCondition();
if(condition) // non default case
{
if(nbCases != 0)
{
emit(sw::Shader::OPCODE_ELSE);
}
condition->traverse(this);
Temporary result(this);
emitBinary(sw::Shader::OPCODE_EQ, &result, switchValue, condition);
emit(sw::Shader::OPCODE_IF, 0, &result);
nbCases++;
// Emit the code for this case and all subsequent cases until we hit a break statement.
// TODO: This can repeat a lot of code for switches with many fall-through cases.
for(++caseIt; caseIt != sequence.end(); ++caseIt)
{
(*caseIt)->traverse(this);
// Stop if we encounter an unconditional branch (break, continue, return, or kill).
// TODO: This doesn't work if the statement is at a deeper scope level (e.g. {break;}).
// Note that this eliminates useless operations but shouldn't affect correctness.
if((*caseIt)->getAsBranchNode())
{
break;
}
}
}
else
{
defaultIt = it; // The default case might not be the last case, keep it for last
}
}
}
// If there's a default case, traverse it here
if(defaultIt != sequence.end())
{
emit(sw::Shader::OPCODE_ELSE);
for(++defaultIt; defaultIt != sequence.end(); ++defaultIt)
{
(*defaultIt)->traverse(this);
if((*defaultIt)->getAsBranchNode()) // Kill, Break, Continue or Return
{
break;
}
}
}
for(int i = 0; i < nbCases; ++i)
{
emit(sw::Shader::OPCODE_ENDIF);
}
emit(sw::Shader::OPCODE_ENDSWITCH);
return false;
}
Instruction *OutputASM::emit(sw::Shader::Opcode op, TIntermTyped *dst, TIntermNode *src0, TIntermNode *src1, TIntermNode *src2, TIntermNode *src3, TIntermNode *src4)
{
return emit(op, dst, 0, src0, 0, src1, 0, src2, 0, src3, 0, src4, 0);
}
Instruction *OutputASM::emit(sw::Shader::Opcode op, TIntermTyped *dst, int dstIndex, TIntermNode *src0, int index0, TIntermNode *src1, int index1,
TIntermNode *src2, int index2, TIntermNode *src3, int index3, TIntermNode *src4, int index4)
{
Instruction *instruction = new Instruction(op);
if(dst)
{
destination(instruction->dst, dst, dstIndex);
}
if(src0)
{
TIntermTyped* src = src0->getAsTyped();
instruction->dst.partialPrecision = src && (src->getPrecision() <= EbpLow);
}
source(instruction->src[0], src0, index0);
source(instruction->src[1], src1, index1);
source(instruction->src[2], src2, index2);
source(instruction->src[3], src3, index3);
source(instruction->src[4], src4, index4);
shader->append(instruction);
return instruction;
}
Instruction *OutputASM::emitCast(TIntermTyped *dst, TIntermTyped *src)
{
return emitCast(dst, 0, src, 0);
}
Instruction *OutputASM::emitCast(TIntermTyped *dst, int dstIndex, TIntermTyped *src, int srcIndex)
{
switch(src->getBasicType())
{
case EbtBool:
switch(dst->getBasicType())
{
case EbtInt: return emit(sw::Shader::OPCODE_B2I, dst, dstIndex, src, srcIndex);
case EbtUInt: return emit(sw::Shader::OPCODE_B2I, dst, dstIndex, src, srcIndex);
case EbtFloat: return emit(sw::Shader::OPCODE_B2F, dst, dstIndex, src, srcIndex);
default: break;
}
break;
case EbtInt:
switch(dst->getBasicType())
{
case EbtBool: return emit(sw::Shader::OPCODE_I2B, dst, dstIndex, src, srcIndex);
case EbtFloat: return emit(sw::Shader::OPCODE_I2F, dst, dstIndex, src, srcIndex);
default: break;
}
break;
case EbtUInt:
switch(dst->getBasicType())
{
case EbtBool: return emit(sw::Shader::OPCODE_I2B, dst, dstIndex, src, srcIndex);
case EbtFloat: return emit(sw::Shader::OPCODE_U2F, dst, dstIndex, src, srcIndex);
default: break;
}
break;
case EbtFloat:
switch(dst->getBasicType())
{
case EbtBool: return emit(sw::Shader::OPCODE_F2B, dst, dstIndex, src, srcIndex);
case EbtInt: return emit(sw::Shader::OPCODE_F2I, dst, dstIndex, src, srcIndex);
case EbtUInt: return emit(sw::Shader::OPCODE_F2U, dst, dstIndex, src, srcIndex);
default: break;
}
break;
default:
break;
}
ASSERT((src->getBasicType() == dst->getBasicType()) ||
((src->getBasicType() == EbtInt) && (dst->getBasicType() == EbtUInt)) ||
((src->getBasicType() == EbtUInt) && (dst->getBasicType() == EbtInt)));
return emit(sw::Shader::OPCODE_MOV, dst, dstIndex, src, srcIndex);
}
void OutputASM::emitBinary(sw::Shader::Opcode op, TIntermTyped *dst, TIntermNode *src0, TIntermNode *src1, TIntermNode *src2)
{
for(int index = 0; index < dst->elementRegisterCount(); index++)
{
emit(op, dst, index, src0, index, src1, index, src2, index);
}
}
void OutputASM::emitAssign(sw::Shader::Opcode op, TIntermTyped *result, TIntermTyped *lhs, TIntermTyped *src0, TIntermTyped *src1)
{
emitBinary(op, result, src0, src1);
assignLvalue(lhs, result);
}
void OutputASM::emitCmp(sw::Shader::Control cmpOp, TIntermTyped *dst, TIntermNode *left, TIntermNode *right, int index)
{
sw::Shader::Opcode opcode;
switch(left->getAsTyped()->getBasicType())
{
case EbtBool:
case EbtInt:
opcode = sw::Shader::OPCODE_ICMP;
break;
case EbtUInt:
opcode = sw::Shader::OPCODE_UCMP;
break;
default:
opcode = sw::Shader::OPCODE_CMP;
break;
}
Instruction *cmp = emit(opcode, dst, 0, left, index, right, index);
cmp->control = cmpOp;
}
int componentCount(const TType &type, int registers)
{
if(registers == 0)
{
return 0;
}
if(type.isArray() && registers >= type.elementRegisterCount())
{
int index = registers / type.elementRegisterCount();
registers -= index * type.elementRegisterCount();
return index * type.getElementSize() + componentCount(type, registers);
}
if(type.isStruct() || type.isInterfaceBlock())
{
const TFieldList& fields = type.getStruct() ? type.getStruct()->fields() : type.getInterfaceBlock()->fields();
int elements = 0;
for(const auto &field : fields)
{
const TType &fieldType = *(field->type());
if(fieldType.totalRegisterCount() <= registers)
{
registers -= fieldType.totalRegisterCount();
elements += fieldType.getObjectSize();
}
else // Register within this field
{
return elements + componentCount(fieldType, registers);
}
}
}
else if(type.isMatrix())
{
return registers * type.registerSize();
}
UNREACHABLE(0);
return 0;
}
int registerSize(const TType &type, int registers)
{
if(registers == 0)
{
if(type.isStruct())
{
return registerSize(*((*(type.getStruct()->fields().begin()))->type()), 0);
}
else if(type.isInterfaceBlock())
{
return registerSize(*((*(type.getInterfaceBlock()->fields().begin()))->type()), 0);
}
return type.registerSize();
}
if(type.isArray() && registers >= type.elementRegisterCount())
{
int index = registers / type.elementRegisterCount();
registers -= index * type.elementRegisterCount();
return registerSize(type, registers);
}
if(type.isStruct() || type.isInterfaceBlock())
{
const TFieldList& fields = type.getStruct() ? type.getStruct()->fields() : type.getInterfaceBlock()->fields();
int elements = 0;
for(const auto &field : fields)
{
const TType &fieldType = *(field->type());
if(fieldType.totalRegisterCount() <= registers)
{
registers -= fieldType.totalRegisterCount();
elements += fieldType.getObjectSize();
}
else // Register within this field
{
return registerSize(fieldType, registers);
}
}
}
else if(type.isMatrix())
{
return registerSize(type, 0);
}
UNREACHABLE(0);
return 0;
}
int OutputASM::getBlockId(TIntermTyped *arg)
{
if(arg)
{
const TType &type = arg->getType();
TInterfaceBlock* block = type.getInterfaceBlock();
if(block && (type.getQualifier() == EvqUniform))
{
// Make sure the uniform block is declared
uniformRegister(arg);
const char* blockName = block->name().c_str();
// Fetch uniform block index from array of blocks
for(ActiveUniformBlocks::const_iterator it = shaderObject->activeUniformBlocks.begin(); it != shaderObject->activeUniformBlocks.end(); ++it)
{
if(blockName == it->name)
{
return it->blockId;
}
}
ASSERT(false);
}
}
return -1;
}
OutputASM::ArgumentInfo OutputASM::getArgumentInfo(TIntermTyped *arg, int index)
{
const TType &type = arg->getType();
int blockId = getBlockId(arg);
ArgumentInfo argumentInfo(BlockMemberInfo::getDefaultBlockInfo(), type, -1, -1);
if(blockId != -1)
{
argumentInfo.bufferIndex = 0;
for(int i = 0; i < blockId; ++i)
{
int blockArraySize = shaderObject->activeUniformBlocks[i].arraySize;
argumentInfo.bufferIndex += blockArraySize > 0 ? blockArraySize : 1;
}
const BlockDefinitionIndexMap& blockDefinition = blockDefinitions[blockId];
BlockDefinitionIndexMap::const_iterator itEnd = blockDefinition.end();
BlockDefinitionIndexMap::const_iterator it = itEnd;
argumentInfo.clampedIndex = index;
if(type.isInterfaceBlock())
{
// Offset index to the beginning of the selected instance
int blockRegisters = type.elementRegisterCount();
int bufferOffset = argumentInfo.clampedIndex / blockRegisters;
argumentInfo.bufferIndex += bufferOffset;
argumentInfo.clampedIndex -= bufferOffset * blockRegisters;
}
int regIndex = registerIndex(arg);
for(int i = regIndex + argumentInfo.clampedIndex; i >= regIndex; --i)
{
it = blockDefinition.find(i);
if(it != itEnd)
{
argumentInfo.clampedIndex -= (i - regIndex);
break;
}
}
ASSERT(it != itEnd);
argumentInfo.typedMemberInfo = it->second;
int registerCount = argumentInfo.typedMemberInfo.type.totalRegisterCount();
argumentInfo.clampedIndex = (argumentInfo.clampedIndex >= registerCount) ? registerCount - 1 : argumentInfo.clampedIndex;
}
else
{
argumentInfo.clampedIndex = (index >= arg->totalRegisterCount()) ? arg->totalRegisterCount() - 1 : index;
}
return argumentInfo;
}
void OutputASM::source(sw::Shader::SourceParameter ¶meter, TIntermNode *argument, int index)
{
if(argument)
{
TIntermTyped *arg = argument->getAsTyped();
Temporary unpackedUniform(this);
const TType& srcType = arg->getType();
TInterfaceBlock* srcBlock = srcType.getInterfaceBlock();
if(srcBlock && (srcType.getQualifier() == EvqUniform))
{
const ArgumentInfo argumentInfo = getArgumentInfo(arg, index);
const TType &memberType = argumentInfo.typedMemberInfo.type;
if(memberType.getBasicType() == EbtBool)
{
ASSERT(argumentInfo.clampedIndex < (memberType.isArray() ? memberType.getArraySize() : 1)); // index < arraySize
// Convert the packed bool, which is currently an int, to a true bool
Instruction *instruction = new Instruction(sw::Shader::OPCODE_I2B);
instruction->dst.type = sw::Shader::PARAMETER_TEMP;
instruction->dst.index = registerIndex(&unpackedUniform);
instruction->src[0].type = sw::Shader::PARAMETER_CONST;
instruction->src[0].bufferIndex = argumentInfo.bufferIndex;
instruction->src[0].index = argumentInfo.typedMemberInfo.offset + argumentInfo.clampedIndex * argumentInfo.typedMemberInfo.arrayStride;
shader->append(instruction);
arg = &unpackedUniform;
index = 0;
}
else if((memberType.getLayoutQualifier().matrixPacking == EmpRowMajor) && memberType.isMatrix())
{
int numCols = memberType.getNominalSize();
int numRows = memberType.getSecondarySize();
ASSERT(argumentInfo.clampedIndex < (numCols * (memberType.isArray() ? memberType.getArraySize() : 1))); // index < cols * arraySize
unsigned int dstIndex = registerIndex(&unpackedUniform);
unsigned int srcSwizzle = (argumentInfo.clampedIndex % numCols) * 0x55;
int arrayIndex = argumentInfo.clampedIndex / numCols;
int matrixStartOffset = argumentInfo.typedMemberInfo.offset + arrayIndex * argumentInfo.typedMemberInfo.arrayStride;
for(int j = 0; j < numRows; ++j)
{
// Transpose the row major matrix
Instruction *instruction = new Instruction(sw::Shader::OPCODE_MOV);
instruction->dst.type = sw::Shader::PARAMETER_TEMP;
instruction->dst.index = dstIndex;
instruction->dst.mask = 1 << j;
instruction->src[0].type = sw::Shader::PARAMETER_CONST;
instruction->src[0].bufferIndex = argumentInfo.bufferIndex;
instruction->src[0].index = matrixStartOffset + j * argumentInfo.typedMemberInfo.matrixStride;
instruction->src[0].swizzle = srcSwizzle;
shader->append(instruction);
}
arg = &unpackedUniform;
index = 0;
}
}
const ArgumentInfo argumentInfo = getArgumentInfo(arg, index);
const TType &type = argumentInfo.typedMemberInfo.type;
int size = registerSize(type, argumentInfo.clampedIndex);
parameter.type = registerType(arg);
parameter.bufferIndex = argumentInfo.bufferIndex;
if(arg->getAsConstantUnion() && arg->getAsConstantUnion()->getUnionArrayPointer())
{
int component = componentCount(type, argumentInfo.clampedIndex);
ConstantUnion *constants = arg->getAsConstantUnion()->getUnionArrayPointer();
for(int i = 0; i < 4; i++)
{
if(size == 1) // Replicate
{
parameter.value[i] = constants[component + 0].getAsFloat();
}
else if(i < size)
{
parameter.value[i] = constants[component + i].getAsFloat();
}
else
{
parameter.value[i] = 0.0f;
}
}
}
else
{
parameter.index = registerIndex(arg) + argumentInfo.clampedIndex;
if(parameter.bufferIndex != -1)
{
int stride = (argumentInfo.typedMemberInfo.matrixStride > 0) ? argumentInfo.typedMemberInfo.matrixStride : argumentInfo.typedMemberInfo.arrayStride;
parameter.index = argumentInfo.typedMemberInfo.offset + argumentInfo.clampedIndex * stride;
}
}
if(!IsSampler(arg->getBasicType()))
{
parameter.swizzle = readSwizzle(arg, size);
}
}
}
void OutputASM::destination(sw::Shader::DestinationParameter ¶meter, TIntermTyped *arg, int index)
{
parameter.type = registerType(arg);
parameter.index = registerIndex(arg) + index;
parameter.mask = writeMask(arg, index);
}
void OutputASM::copy(TIntermTyped *dst, TIntermNode *src, int offset)
{
for(int index = 0; index < dst->totalRegisterCount(); index++)
{
Instruction *mov = emit(sw::Shader::OPCODE_MOV, dst, index, src, offset + index);
}
}
int swizzleElement(int swizzle, int index)
{
return (swizzle >> (index * 2)) & 0x03;
}
int swizzleSwizzle(int leftSwizzle, int rightSwizzle)
{
return (swizzleElement(leftSwizzle, swizzleElement(rightSwizzle, 0)) << 0) |
(swizzleElement(leftSwizzle, swizzleElement(rightSwizzle, 1)) << 2) |
(swizzleElement(leftSwizzle, swizzleElement(rightSwizzle, 2)) << 4) |
(swizzleElement(leftSwizzle, swizzleElement(rightSwizzle, 3)) << 6);
}
void OutputASM::assignLvalue(TIntermTyped *dst, TIntermTyped *src)
{
if((src->isVector() && (!dst->isVector() || (src->getNominalSize() != dst->getNominalSize()))) ||
(src->isMatrix() && (!dst->isMatrix() || (src->getNominalSize() != dst->getNominalSize()) || (src->getSecondarySize() != dst->getSecondarySize()))))
{
return mContext.error(src->getLine(), "Result type should match the l-value type in compound assignment", src->isVector() ? "vector" : "matrix");
}
TIntermBinary *binary = dst->getAsBinaryNode();
if(binary && binary->getOp() == EOpIndexIndirect && binary->getLeft()->isVector() && dst->isScalar())
{
Instruction *insert = new Instruction(sw::Shader::OPCODE_INSERT);
lvalue(insert->dst, dst);
insert->src[0].type = insert->dst.type;
insert->src[0].index = insert->dst.index;
insert->src[0].rel = insert->dst.rel;
source(insert->src[1], src);
source(insert->src[2], binary->getRight());
shader->append(insert);
}
else
{
Instruction *mov1 = new Instruction(sw::Shader::OPCODE_MOV);
int swizzle = lvalue(mov1->dst, dst);
source(mov1->src[0], src);
mov1->src[0].swizzle = swizzleSwizzle(mov1->src[0].swizzle, swizzle);
shader->append(mov1);
for(int offset = 1; offset < dst->totalRegisterCount(); offset++)
{
Instruction *mov = new Instruction(sw::Shader::OPCODE_MOV);
mov->dst = mov1->dst;
mov->dst.index += offset;
mov->dst.mask = writeMask(dst, offset);
source(mov->src[0], src, offset);
shader->append(mov);
}
}
}
void OutputASM::evaluateRvalue(TIntermTyped *node)
{
TIntermBinary *binary = node->getAsBinaryNode();
if(binary && binary->getOp() == EOpIndexIndirect && binary->getLeft()->isVector() && node->isScalar())
{
Instruction *insert = new Instruction(sw::Shader::OPCODE_EXTRACT);
destination(insert->dst, node);
Temporary address(this);
unsigned char mask;
TIntermTyped *root = nullptr;
unsigned int offset = 0;
int swizzle = lvalue(root, offset, insert->src[0].rel, mask, address, node);
source(insert->src[0], root, offset);
insert->src[0].swizzle = swizzleSwizzle(insert->src[0].swizzle, swizzle);
source(insert->src[1], binary->getRight());
shader->append(insert);
}
else
{
Instruction *mov1 = new Instruction(sw::Shader::OPCODE_MOV);
destination(mov1->dst, node, 0);
Temporary address(this);
unsigned char mask;
TIntermTyped *root = nullptr;
unsigned int offset = 0;
int swizzle = lvalue(root, offset, mov1->src[0].rel, mask, address, node);
source(mov1->src[0], root, offset);
mov1->src[0].swizzle = swizzleSwizzle(mov1->src[0].swizzle, swizzle);
shader->append(mov1);
for(int i = 1; i < node->totalRegisterCount(); i++)
{
Instruction *mov = emit(sw::Shader::OPCODE_MOV, node, i, root, offset + i);
mov->src[0].rel = mov1->src[0].rel;
}
}
}
int OutputASM::lvalue(sw::Shader::DestinationParameter &dst, TIntermTyped *node)
{
Temporary address(this);
TIntermTyped *root = nullptr;
unsigned int offset = 0;
unsigned char mask = 0xF;
int swizzle = lvalue(root, offset, dst.rel, mask, address, node);
dst.type = registerType(root);
dst.index = registerIndex(root) + offset;
dst.mask = mask;
return swizzle;
}
int OutputASM::lvalue(TIntermTyped *&root, unsigned int &offset, sw::Shader::Relative &rel, unsigned char &mask, Temporary &address, TIntermTyped *node)
{
TIntermTyped *result = node;
TIntermBinary *binary = node->getAsBinaryNode();
TIntermSymbol *symbol = node->getAsSymbolNode();
if(binary)
{
TIntermTyped *left = binary->getLeft();
TIntermTyped *right = binary->getRight();
int leftSwizzle = lvalue(root, offset, rel, mask, address, left); // Resolve the l-value of the left side
switch(binary->getOp())
{
case EOpIndexDirect:
{
int rightIndex = right->getAsConstantUnion()->getIConst(0);
if(left->isRegister())
{
int leftMask = mask;
mask = 1;
while((leftMask & mask) == 0)
{
mask = mask << 1;
}
int element = swizzleElement(leftSwizzle, rightIndex);
mask = 1 << element;
return element;
}
else if(left->isArray() || left->isMatrix())
{
offset += rightIndex * result->totalRegisterCount();
return 0xE4;
}
else UNREACHABLE(0);
}
break;
case EOpIndexIndirect:
{
right->traverse(this);
if(left->isRegister())
{
// Requires INSERT instruction (handled by calling function)
}
else if(left->isArray() || left->isMatrix())
{
int scale = result->totalRegisterCount();
if(rel.type == sw::Shader::PARAMETER_VOID) // Use the index register as the relative address directly
{
if(left->totalRegisterCount() > 1)
{
sw::Shader::SourceParameter relativeRegister;
source(relativeRegister, right);
rel.index = relativeRegister.index;
rel.type = relativeRegister.type;
rel.scale = scale;
rel.deterministic = !(vertexShader && left->getQualifier() == EvqUniform);
}
}
else if(rel.index != registerIndex(&address)) // Move the previous index register to the address register
{
if(scale == 1)
{
Constant oldScale((int)rel.scale);
Instruction *mad = emit(sw::Shader::OPCODE_IMAD, &address, &address, &oldScale, right);
mad->src[0].index = rel.index;
mad->src[0].type = rel.type;
}
else
{
Constant oldScale((int)rel.scale);
Instruction *mul = emit(sw::Shader::OPCODE_IMUL, &address, &address, &oldScale);
mul->src[0].index = rel.index;
mul->src[0].type = rel.type;
Constant newScale(scale);
emit(sw::Shader::OPCODE_IMAD, &address, right, &newScale, &address);
}
rel.type = sw::Shader::PARAMETER_TEMP;
rel.index = registerIndex(&address);
rel.scale = 1;
}
else // Just add the new index to the address register
{
if(scale == 1)
{
emit(sw::Shader::OPCODE_IADD, &address, &address, right);
}
else
{
Constant newScale(scale);
emit(sw::Shader::OPCODE_IMAD, &address, right, &newScale, &address);
}
}
}
else UNREACHABLE(0);
}
break;
case EOpIndexDirectStruct:
case EOpIndexDirectInterfaceBlock:
{
const TFieldList& fields = (binary->getOp() == EOpIndexDirectStruct) ?
left->getType().getStruct()->fields() :
left->getType().getInterfaceBlock()->fields();
int index = right->getAsConstantUnion()->getIConst(0);
int fieldOffset = 0;
for(int i = 0; i < index; i++)
{
fieldOffset += fields[i]->type()->totalRegisterCount();
}
offset += fieldOffset;
mask = writeMask(result);
return 0xE4;
}
break;
case EOpVectorSwizzle:
{
ASSERT(left->isRegister());
int leftMask = mask;
int swizzle = 0;
int rightMask = 0;
TIntermSequence &sequence = right->getAsAggregate()->getSequence();
for(unsigned int i = 0; i < sequence.size(); i++)
{
int index = sequence[i]->getAsConstantUnion()->getIConst(0);
int element = swizzleElement(leftSwizzle, index);
rightMask = rightMask | (1 << element);
swizzle = swizzle | swizzleElement(leftSwizzle, i) << (element * 2);
}
mask = leftMask & rightMask;
return swizzle;
}
break;
default:
UNREACHABLE(binary->getOp()); // Not an l-value operator
break;
}
}
else if(symbol)
{
root = symbol;
offset = 0;
mask = writeMask(symbol);
return 0xE4;
}
else
{
node->traverse(this);
root = node;
offset = 0;
mask = writeMask(node);
return 0xE4;
}
return 0xE4;
}
sw::Shader::ParameterType OutputASM::registerType(TIntermTyped *operand)
{
if(isSamplerRegister(operand))
{
return sw::Shader::PARAMETER_SAMPLER;
}
const TQualifier qualifier = operand->getQualifier();
if((qualifier == EvqFragColor) || (qualifier == EvqFragData))
{
if(((qualifier == EvqFragData) && (outputQualifier == EvqFragColor)) ||
((qualifier == EvqFragColor) && (outputQualifier == EvqFragData)))
{
mContext.error(operand->getLine(), "static assignment to both gl_FragData and gl_FragColor", "");
}
outputQualifier = qualifier;
}
if(qualifier == EvqConstExpr && (!operand->getAsConstantUnion() || !operand->getAsConstantUnion()->getUnionArrayPointer()))
{
// Constant arrays are in the constant register file.
if(operand->isArray() && operand->getArraySize() > 1)
{
return sw::Shader::PARAMETER_CONST;
}
else
{
return sw::Shader::PARAMETER_TEMP;
}
}
switch(qualifier)
{
case EvqTemporary: return sw::Shader::PARAMETER_TEMP;
case EvqGlobal: return sw::Shader::PARAMETER_TEMP;
case EvqConstExpr: return sw::Shader::PARAMETER_FLOAT4LITERAL; // All converted to float
case EvqAttribute: return sw::Shader::PARAMETER_INPUT;
case EvqVaryingIn: return sw::Shader::PARAMETER_INPUT;
case EvqVaryingOut: return sw::Shader::PARAMETER_OUTPUT;
case EvqVertexIn: return sw::Shader::PARAMETER_INPUT;
case EvqFragmentOut: return sw::Shader::PARAMETER_COLOROUT;
case EvqVertexOut: return sw::Shader::PARAMETER_OUTPUT;
case EvqFragmentIn: return sw::Shader::PARAMETER_INPUT;
case EvqInvariantVaryingIn: return sw::Shader::PARAMETER_INPUT; // FIXME: Guarantee invariance at the backend
case EvqInvariantVaryingOut: return sw::Shader::PARAMETER_OUTPUT; // FIXME: Guarantee invariance at the backend
case EvqSmooth: return sw::Shader::PARAMETER_OUTPUT;
case EvqFlat: return sw::Shader::PARAMETER_OUTPUT;
case EvqCentroidOut: return sw::Shader::PARAMETER_OUTPUT;
case EvqSmoothIn: return sw::Shader::PARAMETER_INPUT;
case EvqFlatIn: return sw::Shader::PARAMETER_INPUT;
case EvqCentroidIn: return sw::Shader::PARAMETER_INPUT;
case EvqUniform: return sw::Shader::PARAMETER_CONST;
case EvqIn: return sw::Shader::PARAMETER_TEMP;
case EvqOut: return sw::Shader::PARAMETER_TEMP;
case EvqInOut: return sw::Shader::PARAMETER_TEMP;
case EvqConstReadOnly: return sw::Shader::PARAMETER_TEMP;
case EvqPosition: return sw::Shader::PARAMETER_OUTPUT;
case EvqPointSize: return sw::Shader::PARAMETER_OUTPUT;
case EvqInstanceID: return sw::Shader::PARAMETER_MISCTYPE;
case EvqVertexID: return sw::Shader::PARAMETER_MISCTYPE;
case EvqFragCoord: return sw::Shader::PARAMETER_MISCTYPE;
case EvqFrontFacing: return sw::Shader::PARAMETER_MISCTYPE;
case EvqPointCoord: return sw::Shader::PARAMETER_INPUT;
case EvqFragColor: return sw::Shader::PARAMETER_COLOROUT;
case EvqFragData: return sw::Shader::PARAMETER_COLOROUT;
case EvqFragDepth: return sw::Shader::PARAMETER_DEPTHOUT;
default: UNREACHABLE(qualifier);
}
return sw::Shader::PARAMETER_VOID;
}
bool OutputASM::hasFlatQualifier(TIntermTyped *operand)
{
const TQualifier qualifier = operand->getQualifier();
return qualifier == EvqFlat || qualifier == EvqFlatOut || qualifier == EvqFlatIn;
}
unsigned int OutputASM::registerIndex(TIntermTyped *operand)
{
if(isSamplerRegister(operand))
{
return samplerRegister(operand);
}
switch(operand->getQualifier())
{
case EvqTemporary: return temporaryRegister(operand);
case EvqGlobal: return temporaryRegister(operand);
case EvqConstExpr: return temporaryRegister(operand); // Unevaluated constant expression
case EvqAttribute: return attributeRegister(operand);
case EvqVaryingIn: return varyingRegister(operand);
case EvqVaryingOut: return varyingRegister(operand);
case EvqVertexIn: return attributeRegister(operand);
case EvqFragmentOut: return fragmentOutputRegister(operand);
case EvqVertexOut: return varyingRegister(operand);
case EvqFragmentIn: return varyingRegister(operand);
case EvqInvariantVaryingIn: return varyingRegister(operand);
case EvqInvariantVaryingOut: return varyingRegister(operand);
case EvqSmooth: return varyingRegister(operand);
case EvqFlat: return varyingRegister(operand);
case EvqCentroidOut: return varyingRegister(operand);
case EvqSmoothIn: return varyingRegister(operand);
case EvqFlatIn: return varyingRegister(operand);
case EvqCentroidIn: return varyingRegister(operand);
case EvqUniform: return uniformRegister(operand);
case EvqIn: return temporaryRegister(operand);
case EvqOut: return temporaryRegister(operand);
case EvqInOut: return temporaryRegister(operand);
case EvqConstReadOnly: return temporaryRegister(operand);
case EvqPosition: return varyingRegister(operand);
case EvqPointSize: return varyingRegister(operand);
case EvqInstanceID: vertexShader->declareInstanceId(); return sw::Shader::InstanceIDIndex;
case EvqVertexID: vertexShader->declareVertexId(); return sw::Shader::VertexIDIndex;
case EvqFragCoord: pixelShader->declareVPos(); return sw::Shader::VPosIndex;
case EvqFrontFacing: pixelShader->declareVFace(); return sw::Shader::VFaceIndex;
case EvqPointCoord: return varyingRegister(operand);
case EvqFragColor: return 0;
case EvqFragData: return fragmentOutputRegister(operand);
case EvqFragDepth: return 0;
default: UNREACHABLE(operand->getQualifier());
}
return 0;
}
int OutputASM::writeMask(TIntermTyped *destination, int index)
{
if(destination->getQualifier() == EvqPointSize)
{
return 0x2; // Point size stored in the y component
}
return 0xF >> (4 - registerSize(destination->getType(), index));
}
int OutputASM::readSwizzle(TIntermTyped *argument, int size)
{
if(argument->getQualifier() == EvqPointSize)
{
return 0x55; // Point size stored in the y component
}
static const unsigned char swizzleSize[5] = {0x00, 0x00, 0x54, 0xA4, 0xE4}; // (void), xxxx, xyyy, xyzz, xyzw
return swizzleSize[size];
}
// Conservatively checks whether an expression is fast to compute and has no side effects
bool OutputASM::trivial(TIntermTyped *expression, int budget)
{
if(!expression->isRegister())
{
return false;
}
return cost(expression, budget) >= 0;
}
// Returns the remaining computing budget (if < 0 the expression is too expensive or has side effects)
int OutputASM::cost(TIntermNode *expression, int budget)
{
if(budget < 0)
{
return budget;
}
if(expression->getAsSymbolNode())
{
return budget;
}
else if(expression->getAsConstantUnion())
{
return budget;
}
else if(expression->getAsBinaryNode())
{
TIntermBinary *binary = expression->getAsBinaryNode();
switch(binary->getOp())
{
case EOpVectorSwizzle:
case EOpIndexDirect:
case EOpIndexDirectStruct:
case EOpIndexDirectInterfaceBlock:
return cost(binary->getLeft(), budget - 0);
case EOpAdd:
case EOpSub:
case EOpMul:
return cost(binary->getLeft(), cost(binary->getRight(), budget - 1));
default:
return -1;
}
}
else if(expression->getAsUnaryNode())
{
TIntermUnary *unary = expression->getAsUnaryNode();
switch(unary->getOp())
{
case EOpAbs:
case EOpNegative:
return cost(unary->getOperand(), budget - 1);
default:
return -1;
}
}
else if(expression->getAsSelectionNode())
{
TIntermSelection *selection = expression->getAsSelectionNode();
if(selection->usesTernaryOperator())
{
TIntermTyped *condition = selection->getCondition();
TIntermNode *trueBlock = selection->getTrueBlock();
TIntermNode *falseBlock = selection->getFalseBlock();
TIntermConstantUnion *constantCondition = condition->getAsConstantUnion();
if(constantCondition)
{
bool trueCondition = constantCondition->getUnionArrayPointer()->getBConst();
if(trueCondition)
{
return cost(trueBlock, budget - 0);
}
else
{
return cost(falseBlock, budget - 0);
}
}
else
{
return cost(trueBlock, cost(falseBlock, budget - 2));
}
}
}
return -1;
}
const Function *OutputASM::findFunction(const TString &name)
{
for(unsigned int f = 0; f < functionArray.size(); f++)
{
if(functionArray[f].name == name)
{
return &functionArray[f];
}
}
return 0;
}
int OutputASM::temporaryRegister(TIntermTyped *temporary)
{
return allocate(temporaries, temporary);
}
void OutputASM::setPixelShaderInputs(const TType& type, int var, bool flat)
{
if(type.isStruct())
{
const TFieldList &fields = type.getStruct()->fields();
int fieldVar = var;
for(const auto &field : fields)
{
const TType& fieldType = *(field->type());
setPixelShaderInputs(fieldType, fieldVar, flat);
fieldVar += fieldType.totalRegisterCount();
}
}
else
{
for(int i = 0; i < type.totalRegisterCount(); i++)
{
pixelShader->setInput(var + i, type.registerSize(), sw::Shader::Semantic(sw::Shader::USAGE_COLOR, var + i, flat));
}
}
}
int OutputASM::varyingRegister(TIntermTyped *varying)
{
int var = lookup(varyings, varying);
if(var == -1)
{
var = allocate(varyings, varying);
int registerCount = varying->totalRegisterCount();
if(pixelShader)
{
if((var + registerCount) > sw::MAX_FRAGMENT_INPUTS)
{
mContext.error(varying->getLine(), "Varyings packing failed: Too many varyings", "fragment shader");
return 0;
}
if(varying->getQualifier() == EvqPointCoord)
{
ASSERT(varying->isRegister());
pixelShader->setInput(var, varying->registerSize(), sw::Shader::Semantic(sw::Shader::USAGE_TEXCOORD, var));
}
else
{
setPixelShaderInputs(varying->getType(), var, hasFlatQualifier(varying));
}
}
else if(vertexShader)
{
if((var + registerCount) > sw::MAX_VERTEX_OUTPUTS)
{
mContext.error(varying->getLine(), "Varyings packing failed: Too many varyings", "vertex shader");
return 0;
}
if(varying->getQualifier() == EvqPosition)
{
ASSERT(varying->isRegister());
vertexShader->setPositionRegister(var);
}
else if(varying->getQualifier() == EvqPointSize)
{
ASSERT(varying->isRegister());
vertexShader->setPointSizeRegister(var);
}
else
{
// Semantic indexes for user varyings will be assigned during program link to match the pixel shader
}
}
else UNREACHABLE(0);
declareVarying(varying, var);
}
return var;
}
void OutputASM::declareVarying(TIntermTyped *varying, int reg)
{
if(varying->getQualifier() != EvqPointCoord) // gl_PointCoord does not need linking
{
TIntermSymbol *symbol = varying->getAsSymbolNode();
declareVarying(varying->getType(), symbol->getSymbol(), reg);
}
}
void OutputASM::declareVarying(const TType &type, const TString &varyingName, int registerIndex)
{
const char *name = varyingName.c_str();
VaryingList &activeVaryings = shaderObject->varyings;
TStructure* structure = type.getStruct();
if(structure)
{
int fieldRegisterIndex = registerIndex;
const TFieldList &fields = type.getStruct()->fields();
for(const auto &field : fields)
{
const TType& fieldType = *(field->type());
declareVarying(fieldType, varyingName + "." + field->name(), fieldRegisterIndex);
if(fieldRegisterIndex >= 0)
{
fieldRegisterIndex += fieldType.totalRegisterCount();
}
}
}
else
{
// Check if this varying has been declared before without having a register assigned
for(VaryingList::iterator v = activeVaryings.begin(); v != activeVaryings.end(); v++)
{
if(v->name == name)
{
if(registerIndex >= 0)
{
ASSERT(v->registerIndex < 0 || v->registerIndex == registerIndex);
v->registerIndex = registerIndex;
}
return;
}
}
activeVaryings.push_back(glsl::Varying(type, name, registerIndex, 0));
}
}
void OutputASM::declareFragmentOutput(TIntermTyped *fragmentOutput)
{
int requestedLocation = fragmentOutput->getType().getLayoutQualifier().location;
int registerCount = fragmentOutput->totalRegisterCount();
if(requestedLocation < 0)
{
ASSERT(requestedLocation == -1); // All other negative values would have been prevented in TParseContext::parseLayoutQualifier
return; // No requested location
}
else if((requestedLocation + registerCount) > sw::RENDERTARGETS)
{
mContext.error(fragmentOutput->getLine(), "Fragment output location larger or equal to MAX_DRAW_BUFFERS", "fragment shader");
}
else
{
int currentIndex = lookup(fragmentOutputs, fragmentOutput);
if(requestedLocation != currentIndex)
{
if(currentIndex != -1)
{
mContext.error(fragmentOutput->getLine(), "Multiple locations for fragment output", "fragment shader");
}
else
{
if(fragmentOutputs.size() <= (size_t)requestedLocation)
{
while(fragmentOutputs.size() < (size_t)requestedLocation)
{
fragmentOutputs.push_back(nullptr);
}
for(int i = 0; i < registerCount; i++)
{
fragmentOutputs.push_back(fragmentOutput);
}
}
else
{
for(int i = 0; i < registerCount; i++)
{
if(!fragmentOutputs[requestedLocation + i])
{
fragmentOutputs[requestedLocation + i] = fragmentOutput;
}
else
{
mContext.error(fragmentOutput->getLine(), "Fragment output location aliasing", "fragment shader");
return;
}
}
}
}
}
}
}
int OutputASM::uniformRegister(TIntermTyped *uniform)
{
const TType &type = uniform->getType();
ASSERT(!IsSampler(type.getBasicType()));
TInterfaceBlock *block = type.getAsInterfaceBlock();
TIntermSymbol *symbol = uniform->getAsSymbolNode();
ASSERT(symbol || block);
if(symbol || block)
{
TInterfaceBlock* parentBlock = type.getInterfaceBlock();
bool isBlockMember = (!block && parentBlock);
int index = isBlockMember ? lookup(uniforms, parentBlock) : lookup(uniforms, uniform);
if(index == -1 || isBlockMember)
{
if(index == -1)
{
index = allocate(uniforms, uniform);
}
// Verify if the current uniform is a member of an already declared block
const TString &name = symbol ? symbol->getSymbol() : block->name();
int blockMemberIndex = blockMemberLookup(type, name, index);
if(blockMemberIndex == -1)
{
declareUniform(type, name, index, false);
}
else
{
index = blockMemberIndex;
}
}
return index;
}
return 0;
}
int OutputASM::attributeRegister(TIntermTyped *attribute)
{
ASSERT(!attribute->isArray());
int index = lookup(attributes, attribute);
if(index == -1)
{
TIntermSymbol *symbol = attribute->getAsSymbolNode();
ASSERT(symbol);
if(symbol)
{
index = allocate(attributes, attribute);
const TType &type = attribute->getType();
int registerCount = attribute->totalRegisterCount();
sw::VertexShader::AttribType attribType = sw::VertexShader::ATTRIBTYPE_FLOAT;
switch(type.getBasicType())
{
case EbtInt:
attribType = sw::VertexShader::ATTRIBTYPE_INT;
break;
case EbtUInt:
attribType = sw::VertexShader::ATTRIBTYPE_UINT;
break;
case EbtFloat:
default:
break;
}
if(vertexShader && (index + registerCount) <= sw::MAX_VERTEX_INPUTS)
{
for(int i = 0; i < registerCount; i++)
{
vertexShader->setInput(index + i, sw::Shader::Semantic(sw::Shader::USAGE_TEXCOORD, index + i, false), attribType);
}
}
ActiveAttributes &activeAttributes = shaderObject->activeAttributes;
const char *name = symbol->getSymbol().c_str();
activeAttributes.push_back(Attribute(glVariableType(type), name, type.getArraySize(), type.getLayoutQualifier().location, index));
}
}
return index;
}
int OutputASM::fragmentOutputRegister(TIntermTyped *fragmentOutput)
{
return allocate(fragmentOutputs, fragmentOutput);
}
int OutputASM::samplerRegister(TIntermTyped *sampler)
{
const TType &type = sampler->getType();
ASSERT(IsSampler(type.getBasicType()) || type.isStruct()); // Structures can contain samplers
TIntermSymbol *symbol = sampler->getAsSymbolNode();
TIntermBinary *binary = sampler->getAsBinaryNode();
if(symbol)
{
switch(type.getQualifier())
{
case EvqUniform:
return samplerRegister(symbol);
case EvqIn:
case EvqConstReadOnly:
// Function arguments are not (uniform) sampler registers
return -1;
default:
UNREACHABLE(type.getQualifier());
}
}
else if(binary)
{
TIntermTyped *left = binary->getLeft();
TIntermTyped *right = binary->getRight();
const TType &leftType = left->getType();
int index = right->getAsConstantUnion() ? right->getAsConstantUnion()->getIConst(0) : 0;
int offset = 0;
switch(binary->getOp())
{
case EOpIndexDirect:
ASSERT(left->isArray());
offset = index * leftType.samplerRegisterCount();
break;
case EOpIndexDirectStruct:
ASSERT(leftType.isStruct());
{
const TFieldList &fields = leftType.getStruct()->fields();
for(int i = 0; i < index; i++)
{
offset += fields[i]->type()->totalSamplerRegisterCount();
}
}
break;
case EOpIndexIndirect: // Indirect indexing produces a temporary, not a sampler register
return -1;
case EOpIndexDirectInterfaceBlock: // Interface blocks can't contain samplers
default:
UNREACHABLE(binary->getOp());
return -1;
}
int base = samplerRegister(left);
if(base < 0)
{
return -1;
}
return base + offset;
}
UNREACHABLE(0);
return -1; // Not a (uniform) sampler register
}
int OutputASM::samplerRegister(TIntermSymbol *sampler)
{
const TType &type = sampler->getType();
ASSERT(IsSampler(type.getBasicType()) || type.isStruct()); // Structures can contain samplers
int index = lookup(samplers, sampler);
if(index == -1)
{
index = allocate(samplers, sampler, true);
if(sampler->getQualifier() == EvqUniform)
{
const char *name = sampler->getSymbol().c_str();
declareUniform(type, name, index, true);
}
}
return index;
}
bool OutputASM::isSamplerRegister(TIntermTyped *operand)
{
return operand && IsSampler(operand->getBasicType()) && samplerRegister(operand) >= 0;
}
int OutputASM::lookup(VariableArray &list, TIntermTyped *variable)
{
for(unsigned int i = 0; i < list.size(); i++)
{
if(list[i] == variable)
{
return i; // Pointer match
}
}
TIntermSymbol *varSymbol = variable->getAsSymbolNode();
TInterfaceBlock *varBlock = variable->getType().getAsInterfaceBlock();
if(varBlock)
{
for(unsigned int i = 0; i < list.size(); i++)
{
if(list[i])
{
TInterfaceBlock *listBlock = list[i]->getType().getAsInterfaceBlock();
if(listBlock)
{
if(listBlock->name() == varBlock->name())
{
ASSERT(listBlock->arraySize() == varBlock->arraySize());
ASSERT(listBlock->fields() == varBlock->fields());
ASSERT(listBlock->blockStorage() == varBlock->blockStorage());
ASSERT(listBlock->matrixPacking() == varBlock->matrixPacking());
return i;
}
}
}
}
}
else if(varSymbol)
{
for(unsigned int i = 0; i < list.size(); i++)
{
if(list[i])
{
TIntermSymbol *listSymbol = list[i]->getAsSymbolNode();
if(listSymbol)
{
if(listSymbol->getId() == varSymbol->getId())
{
ASSERT(listSymbol->getSymbol() == varSymbol->getSymbol());
ASSERT(listSymbol->getType() == varSymbol->getType());
ASSERT(listSymbol->getQualifier() == varSymbol->getQualifier());
return i;
}
}
}
}
}
return -1;
}
int OutputASM::lookup(VariableArray &list, TInterfaceBlock *block)
{
for(unsigned int i = 0; i < list.size(); i++)
{
if(list[i] && (list[i]->getType().getInterfaceBlock() == block))
{
return i; // Pointer match
}
}
return -1;
}
int OutputASM::allocate(VariableArray &list, TIntermTyped *variable, bool samplersOnly)
{
int index = lookup(list, variable);
if(index == -1)
{
unsigned int registerCount = variable->blockRegisterCount(samplersOnly);
for(unsigned int i = 0; i < list.size(); i++)
{
if(list[i] == 0)
{
unsigned int j = 1;
for( ; j < registerCount && (i + j) < list.size(); j++)
{
if(list[i + j] != 0)
{
break;
}
}
if(j == registerCount) // Found free slots
{
for(unsigned int j = 0; j < registerCount; j++)
{
list[i + j] = variable;
}
return i;
}
}
}
index = list.size();
for(unsigned int i = 0; i < registerCount; i++)
{
list.push_back(variable);
}
}
return index;
}
void OutputASM::free(VariableArray &list, TIntermTyped *variable)
{
int index = lookup(list, variable);
if(index >= 0)
{
list[index] = 0;
}
}
int OutputASM::blockMemberLookup(const TType &type, const TString &name, int registerIndex)
{
const TInterfaceBlock *block = type.getInterfaceBlock();
if(block)
{
ActiveUniformBlocks &activeUniformBlocks = shaderObject->activeUniformBlocks;
const TFieldList& fields = block->fields();
const TString &blockName = block->name();
int fieldRegisterIndex = registerIndex;
if(!type.isInterfaceBlock())
{
// This is a uniform that's part of a block, let's see if the block is already defined
for(size_t i = 0; i < activeUniformBlocks.size(); ++i)
{
if(activeUniformBlocks[i].name == blockName.c_str())
{
// The block is already defined, find the register for the current uniform and return it
for(size_t j = 0; j < fields.size(); j++)
{
const TString &fieldName = fields[j]->name();
if(fieldName == name)
{
return fieldRegisterIndex;
}
fieldRegisterIndex += fields[j]->type()->totalRegisterCount();
}
ASSERT(false);
return fieldRegisterIndex;
}
}
}
}
return -1;
}
void OutputASM::declareUniform(const TType &type, const TString &name, int registerIndex, bool samplersOnly, int blockId, BlockLayoutEncoder* encoder)
{
const TStructure *structure = type.getStruct();
const TInterfaceBlock *block = (type.isInterfaceBlock() || (blockId == -1)) ? type.getInterfaceBlock() : nullptr;
if(!structure && !block)
{
ActiveUniforms &activeUniforms = shaderObject->activeUniforms;
const BlockMemberInfo blockInfo = encoder ? encoder->encodeType(type) : BlockMemberInfo::getDefaultBlockInfo();
if(blockId >= 0)
{
blockDefinitions[blockId].insert(BlockDefinitionIndexMap::value_type(registerIndex, TypedMemberInfo(blockInfo, type)));
shaderObject->activeUniformBlocks[blockId].fields.push_back(activeUniforms.size());
}
int fieldRegisterIndex = encoder ? shaderObject->activeUniformBlocks[blockId].registerIndex + BlockLayoutEncoder::getBlockRegister(blockInfo) : registerIndex;
bool isSampler = IsSampler(type.getBasicType());
if(isSampler && samplersOnly)
{
for(int i = 0; i < type.totalRegisterCount(); i++)
{
shader->declareSampler(fieldRegisterIndex + i);
}
}
if(isSampler == samplersOnly)
{
activeUniforms.push_back(Uniform(type, name.c_str(), fieldRegisterIndex, blockId, blockInfo));
}
}
else if(block)
{
ActiveUniformBlocks &activeUniformBlocks = shaderObject->activeUniformBlocks;
const TFieldList& fields = block->fields();
const TString &blockName = block->name();
int fieldRegisterIndex = registerIndex;
bool isUniformBlockMember = !type.isInterfaceBlock() && (blockId == -1);
blockId = activeUniformBlocks.size();
bool isRowMajor = block->matrixPacking() == EmpRowMajor;
activeUniformBlocks.push_back(UniformBlock(blockName.c_str(), 0, block->arraySize(),
block->blockStorage(), isRowMajor, registerIndex, blockId));
blockDefinitions.push_back(BlockDefinitionIndexMap());
Std140BlockEncoder currentBlockEncoder;
currentBlockEncoder.enterAggregateType();
for(const auto &field : fields)
{
const TType &fieldType = *(field->type());
const TString &fieldName = field->name();
if(isUniformBlockMember && (fieldName == name))
{
registerIndex = fieldRegisterIndex;
}
const TString uniformName = block->hasInstanceName() ? blockName + "." + fieldName : fieldName;
declareUniform(fieldType, uniformName, fieldRegisterIndex, samplersOnly, blockId, ¤tBlockEncoder);
fieldRegisterIndex += fieldType.totalRegisterCount();
}
currentBlockEncoder.exitAggregateType();
activeUniformBlocks[blockId].dataSize = currentBlockEncoder.getBlockSize();
}
else
{
// Store struct for program link time validation
shaderObject->activeUniformStructs.push_back(Uniform(type, name.c_str(), registerIndex, -1, BlockMemberInfo::getDefaultBlockInfo()));
int fieldRegisterIndex = registerIndex;
const TFieldList& fields = structure->fields();
if(type.isArray() && (structure || type.isInterfaceBlock()))
{
for(int i = 0; i < type.getArraySize(); i++)
{
if(encoder)
{
encoder->enterAggregateType();
}
for(const auto &field : fields)
{
const TType &fieldType = *(field->type());
const TString &fieldName = field->name();
const TString uniformName = name + "[" + str(i) + "]." + fieldName;
declareUniform(fieldType, uniformName, fieldRegisterIndex, samplersOnly, blockId, encoder);
fieldRegisterIndex += samplersOnly ? fieldType.totalSamplerRegisterCount() : fieldType.totalRegisterCount();
}
if(encoder)
{
encoder->exitAggregateType();
}
}
}
else
{
if(encoder)
{
encoder->enterAggregateType();
}
for(const auto &field : fields)
{
const TType &fieldType = *(field->type());
const TString &fieldName = field->name();
const TString uniformName = name + "." + fieldName;
declareUniform(fieldType, uniformName, fieldRegisterIndex, samplersOnly, blockId, encoder);
fieldRegisterIndex += samplersOnly ? fieldType.totalSamplerRegisterCount() : fieldType.totalRegisterCount();
}
if(encoder)
{
encoder->exitAggregateType();
}
}
}
}
int OutputASM::dim(TIntermNode *v)
{
TIntermTyped *vector = v->getAsTyped();
ASSERT(vector && vector->isRegister());
return vector->getNominalSize();
}
int OutputASM::dim2(TIntermNode *m)
{
TIntermTyped *matrix = m->getAsTyped();
ASSERT(matrix && matrix->isMatrix() && !matrix->isArray());
return matrix->getSecondarySize();
}
// Returns ~0u if no loop count could be determined
unsigned int OutputASM::loopCount(TIntermLoop *node)
{
// Parse loops of the form:
// for(int index = initial; index [comparator] limit; index += increment)
TIntermSymbol *index = 0;
TOperator comparator = EOpNull;
int initial = 0;
int limit = 0;
int increment = 0;
// Parse index name and intial value
if(node->getInit())
{
TIntermAggregate *init = node->getInit()->getAsAggregate();
if(init)
{
TIntermSequence &sequence = init->getSequence();
TIntermTyped *variable = sequence[0]->getAsTyped();
if(variable && variable->getQualifier() == EvqTemporary && variable->getBasicType() == EbtInt)
{
TIntermBinary *assign = variable->getAsBinaryNode();
if(assign && assign->getOp() == EOpInitialize)
{
TIntermSymbol *symbol = assign->getLeft()->getAsSymbolNode();
TIntermConstantUnion *constant = assign->getRight()->getAsConstantUnion();
if(symbol && constant)
{
if(constant->getBasicType() == EbtInt && constant->getNominalSize() == 1)
{
index = symbol;
initial = constant->getUnionArrayPointer()[0].getIConst();
}
}
}
}
}
}
// Parse comparator and limit value
if(index && node->getCondition())
{
TIntermBinary *test = node->getCondition()->getAsBinaryNode();
TIntermSymbol *left = test ? test->getLeft()->getAsSymbolNode() : nullptr;
if(left && (left->getId() == index->getId()))
{
TIntermConstantUnion *constant = test->getRight()->getAsConstantUnion();
if(constant)
{
if(constant->getBasicType() == EbtInt && constant->getNominalSize() == 1)
{
comparator = test->getOp();
limit = constant->getUnionArrayPointer()[0].getIConst();
}
}
}
}
// Parse increment
if(index && comparator != EOpNull && node->getExpression())
{
TIntermBinary *binaryTerminal = node->getExpression()->getAsBinaryNode();
TIntermUnary *unaryTerminal = node->getExpression()->getAsUnaryNode();
if(binaryTerminal)
{
TOperator op = binaryTerminal->getOp();
TIntermConstantUnion *constant = binaryTerminal->getRight()->getAsConstantUnion();
if(constant)
{
if(constant->getBasicType() == EbtInt && constant->getNominalSize() == 1)
{
int value = constant->getUnionArrayPointer()[0].getIConst();
switch(op)
{
case EOpAddAssign: increment = value; break;
case EOpSubAssign: increment = -value; break;
default: UNIMPLEMENTED();
}
}
}
}
else if(unaryTerminal)
{
TOperator op = unaryTerminal->getOp();
switch(op)
{
case EOpPostIncrement: increment = 1; break;
case EOpPostDecrement: increment = -1; break;
case EOpPreIncrement: increment = 1; break;
case EOpPreDecrement: increment = -1; break;
default: UNIMPLEMENTED();
}
}
}
if(index && comparator != EOpNull && increment != 0)
{
if(comparator == EOpLessThanEqual)
{
comparator = EOpLessThan;
limit += 1;
}
else if(comparator == EOpGreaterThanEqual)
{
comparator = EOpLessThan;
limit -= 1;
std::swap(initial, limit);
increment = -increment;
}
else if(comparator == EOpGreaterThan)
{
comparator = EOpLessThan;
std::swap(initial, limit);
increment = -increment;
}
if(comparator == EOpLessThan)
{
if(!(initial < limit)) // Never loops
{
return 0;
}
int iterations = (limit - initial + abs(increment) - 1) / increment; // Ceiling division
if(iterations < 0)
{
return ~0u;
}
return iterations;
}
else UNIMPLEMENTED(); // Falls through
}
return ~0u;
}
bool LoopUnrollable::traverse(TIntermNode *node)
{
loopDepth = 0;
loopUnrollable = true;
node->traverse(this);
return loopUnrollable;
}
bool LoopUnrollable::visitLoop(Visit visit, TIntermLoop *loop)
{
if(visit == PreVisit)
{
loopDepth++;
}
else if(visit == PostVisit)
{
loopDepth++;
}
return true;
}
bool LoopUnrollable::visitBranch(Visit visit, TIntermBranch *node)
{
if(!loopUnrollable)
{
return false;
}
if(!loopDepth)
{
return true;
}
switch(node->getFlowOp())
{
case EOpKill:
case EOpReturn:
break;
case EOpBreak:
case EOpContinue:
loopUnrollable = false;
break;
default: UNREACHABLE(node->getFlowOp());
}
return loopUnrollable;
}
bool LoopUnrollable::visitAggregate(Visit visit, TIntermAggregate *node)
{
return loopUnrollable;
}
}