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/* OpenCL built-in library: signbit()
Copyright (c) 2011 Erik Schnetter <eschnetter@perimeterinstitute.ca>
Perimeter Institute for Theoretical Physics
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONORDEREDRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
/* Correct, but probably slower */
/* DEFINE_BUILTIN_L_V(signbit) */
#define IMPLEMENT_SIGNBIT_BUILTIN_HALF __builtin_signbitf(a) /* use float */
#define IMPLEMENT_SIGNBIT_BUILTIN_FLOAT __builtin_signbitf(a)
#define IMPLEMENT_SIGNBIT_BUILTIN_DOUBLE __builtin_signbit(a)
#define IMPLEMENT_SIGNBIT_DIRECT \
({ \
int bits = CHAR_BIT * sizeof(stype); \
signbit_as_jtype(a) >> (jtype)(bits-1); \
})
#define IMPLEMENT_DIRECT(NAME, VTYPE, STYPE, JTYPE, EXPR) \
__IF_ASTYPE_HELPERS( \
static _CL_OVERLOADABLE \
JTYPE NAME##_as_jtype(VTYPE a) \
{ \
return as_##JTYPE(a); \
} \
) \
JTYPE _CL_OVERLOADABLE NAME(VTYPE a) \
{ \
typedef VTYPE vtype; \
typedef STYPE stype; \
typedef JTYPE jtype; \
return EXPR; \
}
#ifdef cl_khr_fp16
#define __IF_ASTYPE_HELPERS(X)
IMPLEMENT_DIRECT(signbit, half , half, int , IMPLEMENT_SIGNBIT_BUILTIN_HALF)
#undef __IF_ASTYPE_HELPERS
#define __IF_ASTYPE_HELPERS(X) X
IMPLEMENT_DIRECT(signbit, half2 , half, short2 , IMPLEMENT_SIGNBIT_DIRECT)
IMPLEMENT_DIRECT(signbit, half3 , half, short3 , IMPLEMENT_SIGNBIT_DIRECT)
IMPLEMENT_DIRECT(signbit, half4 , half, short4 , IMPLEMENT_SIGNBIT_DIRECT)
IMPLEMENT_DIRECT(signbit, half8 , half, short8 , IMPLEMENT_SIGNBIT_DIRECT)
IMPLEMENT_DIRECT(signbit, half16, half, short16, IMPLEMENT_SIGNBIT_DIRECT)
#undef __IF_ASTYPE_HELPERS
#endif
#define __IF_ASTYPE_HELPERS(X)
IMPLEMENT_DIRECT(signbit, float , float, int , IMPLEMENT_SIGNBIT_BUILTIN_FLOAT)
#undef __IF_ASTYPE_HELPERS
#define __IF_ASTYPE_HELPERS(X) X
IMPLEMENT_DIRECT(signbit, float2 , float, int2 , IMPLEMENT_SIGNBIT_DIRECT)
IMPLEMENT_DIRECT(signbit, float3 , float, int3 , IMPLEMENT_SIGNBIT_DIRECT)
IMPLEMENT_DIRECT(signbit, float4 , float, int4 , IMPLEMENT_SIGNBIT_DIRECT)
IMPLEMENT_DIRECT(signbit, float8 , float, int8 , IMPLEMENT_SIGNBIT_DIRECT)
IMPLEMENT_DIRECT(signbit, float16, float, int16, IMPLEMENT_SIGNBIT_DIRECT)
#undef __IF_ASTYPE_HELPERS
#ifdef cl_khr_fp64
#define __IF_ASTYPE_HELPERS(X)
IMPLEMENT_DIRECT(signbit, double , double, int , IMPLEMENT_SIGNBIT_BUILTIN_DOUBLE)
#undef __IF_ASTYPE_HELPERS
#define __IF_ASTYPE_HELPERS(X) X
IMPLEMENT_DIRECT(signbit, double2 , double, long2 , IMPLEMENT_SIGNBIT_DIRECT)
IMPLEMENT_DIRECT(signbit, double3 , double, long3 , IMPLEMENT_SIGNBIT_DIRECT)
IMPLEMENT_DIRECT(signbit, double4 , double, long4 , IMPLEMENT_SIGNBIT_DIRECT)
IMPLEMENT_DIRECT(signbit, double8 , double, long8 , IMPLEMENT_SIGNBIT_DIRECT)
IMPLEMENT_DIRECT(signbit, double16, double, long16, IMPLEMENT_SIGNBIT_DIRECT)
#undef __IF_ASTYPE_HELPERS
#endif
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