__nv_powf( $\pm 0$ , y) returns $\pm \infty$ for y an integer less than 0.

__nv_powf( $\pm 0$ , y) returns $\pm 0$ for y an odd integer greater than 0.

__nv_powf( $\pm 0$ , y) returns +0 for y > 0 and not and odd integer.

__nv_powf(-1, $\pm \infty$ ) returns 1.

__nv_powf(+1, y) returns 1 for any y, even a NaN.

__nv_powf(x, $\pm 0$ ) returns 1 for any x, even a NaN.

__nv_powf(x, y) returns a NaN for finite x < 0 and finite non-integer y.

__nv_powf(x, $-\infty$ ) returns $+\infty$ for $|x|<1$ .

__nv_powf(x, $-\infty$ ) returns +0 for $|x|>1$ .

__nv_powf(x, $+\infty$ ) returns +0 for $|x|<1$ .

__nv_powf(x, $+\infty$ ) returns $+\infty$ for $|x|>1$ .

__nv_powf( $-\infty$ , y) returns -0 for y an odd integer less than 0.

__nv_powf( $-\infty$ , y) returns +0 for y < 0 and not an odd integer.

__nv_powf( $-\infty$ , y) returns $-\infty$ for y an odd integer greater than 0.

__nv_powf( $-\infty$ , y) returns $+\infty$ for y > 0 and not an odd integer.

__nv_powf( $+\infty$ , y) returns +0 for y < 0.

__nv_powf( $+\infty$ , y) returns $+\infty$ for y > 0.