tests/llvmpipe/glsl/binaryoperator.h

   1 /*
   2  * Copyright © 2012-2021 VMware, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #pragma once
  25
  26 #include "operator.h"
  27 #include "constant.h"
  28
  29 namespace glsl
  30 {
  31    class BinaryOperator : public Operator
  32    {
  33    public:
  34       enum bOperator {
  35          ADD,
  36          SUB,
  37          MUL,
  38          DIV,
  39          MOV
  40       };
  41
  42    public:
  43       BinaryOperator(bOperator op, Operator* left, Operator* right)
  44          : Operator(Operator::BINARY), mOperator(op), mLeft(left), mRight(right)
  45       {
  46       }
  47
  48       ~BinaryOperator()
  49       {
  50          if (mLeft)
  51             delete mLeft;
  52
  53          if (mRight)
  54             delete mRight;
  55       }
  56
  57       virtual Value execute(ShaderState& state) const
  58       {
  59          switch (mOperator) {
  60             case ADD:
  61                return mLeft->execute(state) + mRight->execute(state);
  62             case SUB:
  63                return mLeft->execute(state) - mRight->execute(state);
  64             case MUL:
  65                return mLeft->execute(state) * mRight->execute(state);
  66             case DIV:
  67                return mLeft->execute(state) / mRight->execute(state);
  68             case MOV:
  69                assert(mLeft->operatorType() == Operator::CONSTANT);
  70                ((Constant*)mLeft)->setValue(state, mRight->execute(state));
  71                return mLeft->execute(state);
  72             default:
  73                return Value::vec4;
  74          }
  75       }
  76
  77       virtual std::string toGLSL() const
  78       {
  79          std::string glsl = mLeft->toGLSL() + " " + toOperatorString() + " " + mRight->toGLSL();
  80
  81          if (mOperator != MOV && (mLeft->operatorType() == Operator::BINARY || mRight->operatorType() == Operator::BINARY))
  82             return std::string("(") + glsl + ")";
  83          else
  84             return glsl;
  85       }
  86
  87       bOperator op() const
  88       {
  89          return mOperator;
  90       }
  91
  92       Operator* left() const
  93       {
  94          return mLeft;
  95       }
  96
  97       Operator* right() const
  98       {
  99          return mRight;
 100       }
 101
 102    protected:
 103       std::string toOperatorString() const
 104       {
 105          static const char* names[] = {
 106             "+",
 107             "-",
 108             "*",
 109             "/",
 110             "="
 111          };
 112
 113          return names[mOperator];
 114       }
 115
 116    protected:
 117       bOperator mOperator;
 118       Operator* mLeft;
 119       Operator* mRight;
 120    };
 121 }