NAME

       half_recip,_native_recip - Floating point reciprocal.

       gentype half_recip(gentype x);

       gentype native_recip(gentype x);

DESCRIPTION

       The half_recip computes reciprocal.

       native_recip computes reciprocal over an implementation-defined range. The maximum error is
       implementation-defined.

NOTES

       This built-in math function takes scalar or vector arguments. The generic type name gentype is used to
       indicate that the function can take float, float2, float4, float8, or float16 as the type for the
       arguments. For any specific use of these function, the actual type has to be the same for all arguments
       and the return type.

       Functions with the half_ prefix are implemented with a minimum of 10-bits of accuracy i.e. an ULP value
       less than or equal to 8192 ulp.

       Functions with the native__ prefix may map to one or more native device instructions and will typically
       have better performance compared to the corresponding functions (without the native__ prefix). The
       accuracy (and in some cases the input range(s)) of these functions is implementation-defined.

       The vector versions of the math functions operate component-wise. The description is per-component.

       The built-in math functions are not affected by the prevailing rounding mode in the calling environment,
       and always return the same value as they would if called with the round to nearest even rounding mode.

SPECIFICATION

       OpenCL Specification[1]

SEE ALSO

       mathFunctions(3clc)

AUTHORS

       The Khronos Group

COPYRIGHT

       Copyright © 2007-2011 The Khronos Group Inc.
       Permission is hereby granted, free of charge, to any person obtaining a copy of this software and/or
       associated documentation files (the "Materials"), to deal in the Materials without restriction, including
       without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
       copies of the Materials, and to permit persons to whom the Materials are furnished to do so, subject to
       the condition that this copyright notice and permission notice shall be included in all copies or
       substantial portions of the Materials.

NOTES

        1. OpenCL Specification
           page 244, section 6.12.2 - Math Functions