src/compiler/translator/Operator.h

//
// Copyright (c) 2002-2015 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//

#ifndef COMPILER_TRANSLATOR_OPERATOR_H_
#define COMPILER_TRANSLATOR_OPERATOR_H_

//
// Operators used by the high-level (parse tree) representation.
//
enum TOperator
{
    EOpNull,  // if in a node, should only mean a node is still being built

    // Call a function defined in the AST. This might be a user-defined function or a function
    // inserted by an AST transformation.
    EOpCallFunctionInAST,

    // Call an internal helper function with a raw implementation - the implementation can't be
    // subject to AST transformations. Raw functions have a few constraints to keep them compatible
    // with AST traversers:
    // * They should not return arrays.
    // * They should not have out parameters.
    EOpCallInternalRawFunction,

    // Call a built-in function like a texture or image function.
    EOpCallBuiltInFunction,

    //
    // Unary operators
    //

    EOpNegative,
    EOpPositive,
    EOpLogicalNot,
    EOpBitwiseNot,

    EOpPostIncrement,
    EOpPostDecrement,
    EOpPreIncrement,
    EOpPreDecrement,

    //
    // binary operations (ones with special GLSL syntax are used in TIntermBinary nodes, others in
    // TIntermAggregate nodes)
    //

    EOpAdd,
    EOpSub,
    EOpMul,
    EOpDiv,
    EOpIMod,

    EOpEqual,
    EOpNotEqual,
    EOpLessThan,
    EOpGreaterThan,
    EOpLessThanEqual,
    EOpGreaterThanEqual,

    EOpEqualComponentWise,
    EOpNotEqualComponentWise,
    EOpLessThanComponentWise,
    EOpLessThanEqualComponentWise,
    EOpGreaterThanComponentWise,
    EOpGreaterThanEqualComponentWise,

    EOpComma,

    EOpVectorTimesScalar,
    EOpVectorTimesMatrix,
    EOpMatrixTimesVector,
    EOpMatrixTimesScalar,
    EOpMatrixTimesMatrix,

    EOpLogicalOr,
    EOpLogicalXor,
    EOpLogicalAnd,

    EOpBitShiftLeft,
    EOpBitShiftRight,

    EOpBitwiseAnd,
    EOpBitwiseXor,
    EOpBitwiseOr,

    EOpIndexDirect,
    EOpIndexIndirect,
    EOpIndexDirectStruct,
    EOpIndexDirectInterfaceBlock,

    //
    // Built-in functions mapped to operators (either unary or with multiple parameters)
    //

    EOpRadians,
    EOpDegrees,
    EOpSin,
    EOpCos,
    EOpTan,
    EOpAsin,
    EOpAcos,
    EOpAtan,

    EOpSinh,
    EOpCosh,
    EOpTanh,
    EOpAsinh,
    EOpAcosh,
    EOpAtanh,

    EOpPow,
    EOpExp,
    EOpLog,
    EOpExp2,
    EOpLog2,
    EOpSqrt,
    EOpInverseSqrt,

    EOpAbs,
    EOpSign,
    EOpFloor,
    EOpTrunc,
    EOpRound,
    EOpRoundEven,
    EOpCeil,
    EOpFract,
    EOpMod,
    EOpModf,
    EOpMin,
    EOpMax,
    EOpClamp,
    EOpMix,
    EOpStep,
    EOpSmoothStep,
    EOpIsNan,
    EOpIsInf,

    EOpFloatBitsToInt,
    EOpFloatBitsToUint,
    EOpIntBitsToFloat,
    EOpUintBitsToFloat,

    EOpFrexp,
    EOpLdexp,

    EOpPackSnorm2x16,
    EOpPackUnorm2x16,
    EOpPackHalf2x16,
    EOpUnpackSnorm2x16,
    EOpUnpackUnorm2x16,
    EOpUnpackHalf2x16,

    EOpPackUnorm4x8,
    EOpPackSnorm4x8,
    EOpUnpackUnorm4x8,
    EOpUnpackSnorm4x8,

    EOpLength,
    EOpDistance,
    EOpDot,
    EOpCross,
    EOpNormalize,
    EOpFaceForward,
    EOpReflect,
    EOpRefract,

    EOpDFdx,    // Fragment only, OES_standard_derivatives extension
    EOpDFdy,    // Fragment only, OES_standard_derivatives extension
    EOpFwidth,  // Fragment only, OES_standard_derivatives extension

    EOpMulMatrixComponentWise,
    EOpOuterProduct,
    EOpTranspose,
    EOpDeterminant,
    EOpInverse,

    EOpAny,
    EOpAll,
    EOpLogicalNotComponentWise,

    EOpBitfieldExtract,
    EOpBitfieldInsert,
    EOpBitfieldReverse,
    EOpBitCount,
    EOpFindLSB,
    EOpFindMSB,
    EOpUaddCarry,
    EOpUsubBorrow,
    EOpUmulExtended,
    EOpImulExtended,

    //
    // Branch
    //

    EOpKill,  // Fragment only
    EOpReturn,
    EOpBreak,
    EOpContinue,

    //
    // Constructors
    //

    // Used by ParseContext to denote any constructor.
    EOpConstruct,

    // In the AST, constructors are stored using the below more specific op codes.
    EOpConstructInt,
    EOpConstructUInt,
    EOpConstructBool,
    EOpConstructFloat,
    EOpConstructVec2,
    EOpConstructVec3,
    EOpConstructVec4,
    EOpConstructBVec2,
    EOpConstructBVec3,
    EOpConstructBVec4,
    EOpConstructIVec2,
    EOpConstructIVec3,
    EOpConstructIVec4,
    EOpConstructUVec2,
    EOpConstructUVec3,
    EOpConstructUVec4,
    EOpConstructMat2,
    EOpConstructMat2x3,
    EOpConstructMat2x4,
    EOpConstructMat3x2,
    EOpConstructMat3,
    EOpConstructMat3x4,
    EOpConstructMat4x2,
    EOpConstructMat4x3,
    EOpConstructMat4,
    EOpConstructStruct,

    //
    // moves
    //

    EOpAssign,
    EOpInitialize,
    EOpAddAssign,
    EOpSubAssign,

    EOpMulAssign,
    EOpVectorTimesMatrixAssign,
    EOpVectorTimesScalarAssign,
    EOpMatrixTimesScalarAssign,
    EOpMatrixTimesMatrixAssign,

    EOpDivAssign,
    EOpIModAssign,
    EOpBitShiftLeftAssign,
    EOpBitShiftRightAssign,
    EOpBitwiseAndAssign,
    EOpBitwiseXorAssign,
    EOpBitwiseOrAssign,

    //  barriers
    EOpBarrier,
    EOpMemoryBarrier,
    EOpMemoryBarrierAtomicCounter,
    EOpMemoryBarrierBuffer,
    EOpMemoryBarrierImage,
    EOpMemoryBarrierShared,
    EOpGroupMemoryBarrier
};

// Returns the string corresponding to the operator in GLSL
const char *GetOperatorString(TOperator op);

// Say whether or not a binary or unary operation changes the value of a variable.
bool IsAssignment(TOperator op);

#endif  // COMPILER_TRANSLATOR_OPERATOR_H_