diff options
Diffstat (limited to 'math/s_csqrtf.c')
| -rw-r--r-- | math/s_csqrtf.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/math/s_csqrtf.c b/math/s_csqrtf.c index 7f45cc1320..b30af06e08 100644 --- a/math/s_csqrtf.c +++ b/math/s_csqrtf.c @@ -1,5 +1,5 @@ /* Complex square root of float value. - 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. Based on an algorithm by Stephen L. Moshier <moshier@world.std.com>. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. @@ -104,10 +104,10 @@ __csqrtf (__complex__ float x) __real__ x = 0.0f; __imag__ x = __scalbnf (__imag__ x, -2 * scale); } - else if (fabsf (__real__ x) < FLT_MIN - && fabsf (__imag__ x) < FLT_MIN) + else if (fabsf (__real__ x) < 2.0f * FLT_MIN + && fabsf (__imag__ x) < 2.0f * FLT_MIN) { - scale = -(FLT_MANT_DIG / 2); + scale = -((FLT_MANT_DIG + 1) / 2); __real__ x = __scalbnf (__real__ x, -2 * scale); __imag__ x = __scalbnf (__imag__ x, -2 * scale); } @@ -148,6 +148,9 @@ __csqrtf (__complex__ float x) s = __scalbnf (s, scale); } + math_check_force_underflow (r); + math_check_force_underflow (s); + __real__ res = r; __imag__ res = __copysignf (s, __imag__ x); } |