3.140. __nv_fma

Prototype:

double @__nv_fma(double %x, double %y, double %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_fma( ± , ± 0 , z) returns NaN.

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

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

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

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