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ILOGB(3clc) | OpenCL Manual | ILOGB(3clc) |
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 GroupCOPYRIGHT¶
Copyright © 2007-2011 The Khronos Group Inc.NOTES¶
- 1.
- OpenCL Specification
page 244, section 6.12.2 - Math Functions
06/18/2014 | The Khronos Group |