diff options
Diffstat (limited to 'math/s_clogf.c')
| -rw-r--r-- | math/s_clogf.c | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/math/s_clogf.c b/math/s_clogf.c index bae0fe60ac..cc565398e6 100644 --- a/math/s_clogf.c +++ b/math/s_clogf.c @@ -1,5 +1,5 @@ /* Compute complex natural logarithm. - Copyright (C) 1997-2015 Free Software Foundation, Inc. + Copyright (C) 1997-2016 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. @@ -65,15 +65,8 @@ __clogf (__complex__ float x) if (absx == 1.0f && scale == 0) { - float absy2 = absy * absy; - if (absy2 <= FLT_MIN * 2.0f) - { - float force_underflow = absy2 * absy2; - __real__ result = absy2 / 2.0f; - math_force_eval (force_underflow); - } - else - __real__ result = __log1pf (absy2) / 2.0f; + __real__ result = __log1pf (absy * absy) / 2.0f; + math_check_force_underflow_nonneg (__real__ result); } else if (absx > 1.0f && absx < 2.0f && absy < 1.0f && scale == 0) { @@ -83,14 +76,17 @@ __clogf (__complex__ float x) __real__ result = __log1pf (d2m1) / 2.0f; } else if (absx < 1.0f - && absx >= 0.75f + && absx >= 0.5f && absy < FLT_EPSILON / 2.0f && scale == 0) { float d2m1 = (absx - 1.0f) * (absx + 1.0f); __real__ result = __log1pf (d2m1) / 2.0f; } - else if (absx < 1.0f && (absx >= 0.75f || absy >= 0.5f) && scale == 0) + else if (absx < 1.0f + && absx >= 0.5f + && scale == 0 + && absx * absx + absy * absy >= 0.5f) { float d2m1 = __x2y2m1f (absx, absy); __real__ result = __log1pf (d2m1) / 2.0f; |