3.225. __nv_logb

Prototype: 

double @__nv_logb(double %x)

Description:

Calculate the floating point representation of the exponent of the input argument x.

Returns:

  • __nv_logb ± 0 returns − ∞

  • __nv_logb ± ∞ returns + ∞

Note:

For accuracy information see the CUDA C++ Programming Guide, Mathematical Functions Appendix, Double-Precision Floating-Point Functions section.

Library Availability:

Compute 2.0: Yes

Compute 3.0: Yes

Compute 3.5: Yes