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-rw-r--r--gcc-4.9/libquadmath/math/sincosq.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/gcc-4.9/libquadmath/math/sincosq.c b/gcc-4.9/libquadmath/math/sincosq.c
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+/* Compute sine and cosine of argument.
+ Copyright (C) 1997, 1999 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997 and
+ Jakub Jelinek <jj@ultra.linux.cz>.
+
+ 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 "quadmath-imp.h"
+
+void
+sincosq (__float128 x, __float128 *sinx, __float128 *cosx)
+{
+ int64_t ix;
+
+ /* High word of x. */
+ GET_FLT128_MSW64 (ix, x);
+
+ /* |x| ~< pi/4 */
+ ix &= 0x7fffffffffffffffLL;
+ if (ix <= 0x3ffe921fb54442d1LL)
+ __quadmath_kernel_sincosq (x, 0.0Q, sinx, cosx, 0);
+ else if (ix >= 0x7fff000000000000LL)
+ {
+ /* sin(Inf or NaN) is NaN */
+ *sinx = *cosx = x - x;
+ }
+ else
+ {
+ /* Argument reduction needed. */
+ __float128 y[2];
+ int n;
+
+ n = __quadmath_rem_pio2q (x, y);
+ switch (n & 3)
+ {
+ case 0:
+ __quadmath_kernel_sincosq (y[0], y[1], sinx, cosx, 1);
+ break;
+ case 1:
+ __quadmath_kernel_sincosq (y[0], y[1], cosx, sinx, 1);
+ *cosx = -*cosx;
+ break;
+ case 2:
+ __quadmath_kernel_sincosq (y[0], y[1], sinx, cosx, 1);
+ *sinx = -*sinx;
+ *cosx = -*cosx;
+ break;
+ default:
+ __quadmath_kernel_sincosq (y[0], y[1], cosx, sinx, 1);
+ *sinx = -*sinx;
+ break;
+ }
+ }
+}