## 3.144. __nv_fma_rz

Prototype:

double @__nv_fma_rz(double %x, double %y, double %z)

Description:

Computes the value of $x×y+z$ as a single ternary operation, rounding the result once in round-towards-zero mode.

Returns:

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

• __nv_fma_rz( $±0$ , $±\infty$ , z) returns NaN.

• __nv_fma_rz(x, y, $-\infty$ ) returns NaN if $x×y$ is an exact $+\infty$

• __nv_fma_rz(x, y, $+\infty$ ) returns NaN if $x×y$ is an exact $-\infty$

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