libclc/generic/lib/math/log.cl

   1 #include <clc/clc.h>
   2 #include <clc/clcmacro.h>
   3
   4 /*
   5  *log(x) = log2(x) * (1/log2(e))
   6  */
   7
   8 _CLC_OVERLOAD _CLC_DEF float log(float x)
   9 {
  10     return log2(x) * (1.0f / M_LOG2E_F);
  11 }
  12
  13 _CLC_UNARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, float, log, float);
  14
  15 #ifdef cl_khr_fp64
  16
  17 #pragma OPENCL EXTENSION cl_khr_fp64 : enable
  18
  19 _CLC_OVERLOAD _CLC_DEF double log(double x)
  20 {
  21     return log2(x) * (1.0 / M_LOG2E);
  22 }
  23
  24 _CLC_UNARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, double, log, double);
  25
  26 #endif // cl_khr_fp64