diff options
Diffstat (limited to 'math/s_catanf.c')
| -rw-r--r-- | math/s_catanf.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/math/s_catanf.c b/math/s_catanf.c index aa71e5e..698e2af 100644 --- a/math/s_catanf.c +++ b/math/s_catanf.c @@ -78,14 +78,30 @@ __catanf (__complex__ float x) } else { - float r2, num, den, f; + float r2, num, den, f, absx, absy; - r2 = __real__ x * __real__ x; + absx = fabsf (__real__ x); + absy = fabsf (__imag__ x); + if (absx < absy) + { + float t = absx; + absx = absy; + absy = t; + } - den = 1 - r2 - __imag__ x * __imag__ x; + if (absx >= 1.0f) + den = (1.0f - absx) * (1.0f + absx) - absy * absy; + else if (absx >= 0.75f && absy < FLT_EPSILON / 2.0f) + den = (1.0f - absx) * (1.0f + absx); + else if (absx >= 0.75f || absy >= 0.5f) + den = -__x2y2m1f (absx, absy); + else + den = (1.0f - absx) * (1.0f + absx) - absy * absy; __real__ res = 0.5f * __ieee754_atan2f (2.0f * __real__ x, den); + r2 = __real__ x * __real__ x; + num = __imag__ x + 1.0f; num = r2 + num * num; |