## 3.147. __nv_fmaf_rn

Prototype:

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



Description:

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

Returns:

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

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

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

• __nv_fmaf_rn(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, Single-Precision Floating-Point Functions section.

Library Availability:

Compute 2.0: Yes

Compute 3.0: Yes

Compute 3.5: Yes