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NAME

       ilogb - Exponent as an integer value.

       intn ilogb(floatn x);

       int ilogb(float x);

       intn ilogb(doublen x);

       int ilogb(double x);

       intn ilogb(halfn x);

       int ilogb(half x);

DESCRIPTION

       Returns the exponent as an integer value.

NOTES

       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.

       The built-in math functions take scalar or vector arguments. For any
       specific use of these function, the actual type has to be the same for
       all arguments and the return type unless otherwise specified.

       The generic type name gentype is used to indicate that the function can
       take float, float2, float3, float4, float8, float16, double, double2,
       double3, double4, double8, or double16 as the type for the arguments.

       If extended with cl_khr_fp16(3clc), generic type name gentype may
       indicate half and half{2|3|4|8|16} as arguments and return values.

       The generic type name gentypef is used to indicate that the function
       can take float, float2, float3, float4, float8, or float16 as the type
       for the arguments.

       The generic type name gentyped is used to indicate that the function
       can take double, double2, double3, double4, double8, or double16 as the
       type for the arguments.

       The following macros shall expand to integer constant expressions whose
       values are returned by ilogb(x) if x is zero or NaN, respectively. The
       value of FP_ILOGB0 shall be either {INT_MIN} or - {INT_MAX}. The value
       of FP_ILOGBNAN shall be either {INT_MAX} or {INT_MIN}.

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



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