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Merge pull request #2544 from ZhiqianXia/master

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Replace log2 and exp2 math func.
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greg-lunarg 2021-02-25 10:38:39 -07:00 committed by GitHub
commit 51d672b8a8
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1 changed files with 4 additions and 10 deletions
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14
glslang/MachineIndependent/Constant.cpp
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@ -599,17 +599,11 @@ TIntermTyped* TIntermConstantUnion::fold(TOperator op, const TType& returnType)
newConstArray[i].setDConst(log(unionArray[i].getDConst())); newConstArray[i].setDConst(log(unionArray[i].getDConst()));
break; break;
case EOpExp2: case EOpExp2:
{ newConstArray[i].setDConst(exp2(unionArray[i].getDConst()));
const double inv_log2_e = 0.69314718055994530941723212145818; break;
newConstArray[i].setDConst(exp(unionArray[i].getDConst() * inv_log2_e));
break;
}
case EOpLog2: case EOpLog2:
{ newConstArray[i].setDConst(log2(unionArray[i].getDConst()));
const double log2_e = 1.4426950408889634073599246810019; break;
newConstArray[i].setDConst(log2_e * log(unionArray[i].getDConst()));
break;
}
case EOpSqrt: case EOpSqrt:
newConstArray[i].setDConst(sqrt(unionArray[i].getDConst())); newConstArray[i].setDConst(sqrt(unionArray[i].getDConst()));
break; break;