| #include <clc/clc.h> |
| #include "../clcmacro.h" |
| |
| // This file provides OpenCL C implementations of nextafter for targets that |
| // don't support the clang builtin. |
| |
| #define FLT_NAN 0.0f/0.0f |
| |
| #define NEXTAFTER(FLOAT_TYPE, UINT_TYPE, NAN, ZERO, NEXTAFTER_ZERO) \ |
| _CLC_OVERLOAD _CLC_DEF FLOAT_TYPE __clc_nextafter(FLOAT_TYPE x, FLOAT_TYPE y) { \ |
| union { \ |
| FLOAT_TYPE f; \ |
| UINT_TYPE i; \ |
| } next; \ |
| if (isnan(x) || isnan(y)) { \ |
| return NAN; \ |
| } \ |
| if (x == y) { \ |
| return y; \ |
| } \ |
| next.f = x; \ |
| if (x < y) { \ |
| next.i++; \ |
| } else { \ |
| if (next.f == ZERO) { \ |
| next.i = NEXTAFTER_ZERO; \ |
| } else { \ |
| next.i--; \ |
| } \ |
| } \ |
| return next.f; \ |
| } |
| |
| NEXTAFTER(float, uint, FLT_NAN, 0.0f, 0x80000001) |
| _CLC_BINARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, float, __clc_nextafter, float, float) |
| |
| #ifdef cl_khr_fp64 |
| #pragma OPENCL EXTENSION cl_khr_fp64 : enable |
| #define DBL_NAN 0.0/0.0 |
| |
| NEXTAFTER(double, ulong, DBL_NAN, 0.0, 0x8000000000000001) |
| _CLC_BINARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, double, __clc_nextafter, double, double) |
| #endif |
