libclc/generic/lib/common/sign.cl

   1 #include <clc/clc.h>
   2 #include "../clcmacro.h"
   3
   4 #define SIGN(TYPE, F) \
   5 _CLC_DEF _CLC_OVERLOAD TYPE sign(TYPE x) { \
   6   if (isnan(x)) { \
   7     return 0.0F;   \
   8   }               \
   9   if (x > 0.0F) { \
  10     return 1.0F;  \
  11   }               \
  12   if (x < 0.0F) { \
  13     return -1.0F; \
  14   }               \
  15   return x; /* -0.0 or +0.0 */  \
  16 }
  17
  18 SIGN(float, f)
  19 _CLC_UNARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, float, sign, float)
  20
  21 #ifdef cl_khr_fp64
  22
  23 #pragma OPENCL EXTENSION cl_khr_fp64 : enable
  24
  25 SIGN(double, )
  26 _CLC_UNARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, double, sign, double)
  27
  28 #endif