3.145. __nv_fmaf

Prototype:

float @__nv_fmaf(float %x, float %y, float %z) 

Description:

Compute the value of x × y + z as a single ternary operation. After computing the value to infinite precision, the value is rounded once.

Returns:

Returns the rounded value of x × y + z as a single operation.
  • __nv_fmaf( ± , ± 0 , z) returns NaN.

  • __nv_fmaf( ± 0 , ± , z) returns NaN.

  • __nv_fmaf(x, y, ) returns NaN if x × y is an exact + .

  • __nv_fmaf(x, y, + ) returns NaN if x × y is an exact .

Note:

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

Library Availability:

Compute 2.0: Yes

Compute 3.0: Yes

Compute 3.5: Yes