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authorUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
committerUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
commita334319f6530564d22e775935d9c91663623a1b4 (patch)
treeb5877475619e4c938e98757d518bb1e9cbead751 /math/divtc3.c
parent0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (diff)
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(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.
Diffstat (limited to 'math/divtc3.c')
-rw-r--r--math/divtc3.c75
1 files changed, 0 insertions, 75 deletions
diff --git a/math/divtc3.c b/math/divtc3.c
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--- a/math/divtc3.c
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@@ -1,75 +0,0 @@
-/* Copyright (C) 2005, 2006 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Richard Henderson <rth@redhat.com>, 2005.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
-#include <stdbool.h>
-#include <math.h>
-#include <complex.h>
-
-attribute_hidden
-long double _Complex
-__divtc3 (long double a, long double b, long double c, long double d)
-{
- long double denom, ratio, x, y;
-
- /* ??? We can get better behavior from logarithmic scaling instead of
- the division. But that would mean starting to link libgcc against
- libm. We could implement something akin to ldexp/frexp as gcc builtins
- fairly easily... */
- if (fabsl (c) < fabsl (d))
- {
- ratio = c / d;
- denom = (c * ratio) + d;
- x = ((a * ratio) + b) / denom;
- y = ((b * ratio) - a) / denom;
- }
- else
- {
- ratio = d / c;
- denom = (d * ratio) + c;
- x = ((b * ratio) + a) / denom;
- y = (b - (a * ratio)) / denom;
- }
-
- /* Recover infinities and zeros that computed as NaN+iNaN; the only cases
- are nonzero/zero, infinite/finite, and finite/infinite. */
- if (isnan (x) && isnan (y))
- {
- if (denom == 0.0 && (!isnan (a) || !isnan (b)))
- {
- x = __copysignl (INFINITY, c) * a;
- y = __copysignl (INFINITY, c) * b;
- }
- else if ((isinf (a) || isinf (b)) && isfinite (c) && isfinite (d))
- {
- a = __copysignl (isinf (a) ? 1 : 0, a);
- b = __copysignl (isinf (b) ? 1 : 0, b);
- x = INFINITY * (a * c + b * d);
- y = INFINITY * (b * c - a * d);
- }
- else if ((isinf (c) || isinf (d)) && isfinite (a) && isfinite (b))
- {
- c = __copysignl (isinf (c) ? 1 : 0, c);
- d = __copysignl (isinf (d) ? 1 : 0, d);
- x = 0.0 * (a * c + b * d);
- y = 0.0 * (b * c - a * d);
- }
- }
-
- return x + I * y;
-}