libdevice User's Guide :: CUDA Toolkit Documentation

3.81. __nv_erfcx

Prototype:

double @__nv_erfcx(double %x)

Description:

Calculate the scaled complementary error function of the input argument x, $e^{x^{2}} \cdot erfc (x)$ .

Returns:

__nv_erfcx( $- \infty$ ) returns $+ \infty$
__nv_erfcx( $+ \infty$ ) returns +0
__nv_erfcx(x) returns $+ \infty$ if the correctly calculated value is outside the double floating point range.

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