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Diffstat (limited to 'sysdeps/libm-ieee754/s_sincosf.c')
-rw-r--r--sysdeps/libm-ieee754/s_sincosf.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/sysdeps/libm-ieee754/s_sincosf.c b/sysdeps/libm-ieee754/s_sincosf.c
new file mode 100644
index 0000000000..0fd7b0ca8b
--- /dev/null
+++ b/sysdeps/libm-ieee754/s_sincosf.c
@@ -0,0 +1,74 @@
+/* Compute sine and cosine of argument.
+ Copyright (C) 1997 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <math.h>
+
+#include "math_private.h"
+
+
+void
+__sincosf (float x, float *sinx, float *cosx)
+{
+ int32_t ix;
+
+ /* High word of x. */
+ GET_FLOAT_WORD (ix, x);
+
+ /* |x| ~< pi/4 */
+ ix &= 0x7fffffff;
+ if (ix <= 0x3f490fd8)
+ {
+ *sinx = __kernel_sinf (x, 0.0, 0);
+ *cosx = __kernel_cosf (x, 0.0);
+ }
+ else if (ix>=0x7ff00000)
+ {
+ /* sin(Inf or NaN) is NaN */
+ *sinx = *cosx = x - x;
+ }
+ else
+ {
+ /* Argument reduction needed. */
+ float y[2];
+ int n;
+
+ n = __ieee754_rem_pio2f (x, y);
+ switch (n & 3)
+ {
+ case 0:
+ *sinx = __kernel_sinf (y[0], y[1], 1);
+ *cosx = __kernel_cosf (y[0], y[1]);
+ break;
+ case 1:
+ *sinx = __kernel_cosf (y[0], y[1]);
+ *cosx = -__kernel_sinf (y[0], y[1], 1);
+ break;
+ case 2:
+ *sinx = -__kernel_sinf (y[0], y[1], 1);
+ *cosx = -__kernel_cosf (y[0], y[1]);
+ break;
+ default:
+ *sinx = -__kernel_cosf (y[0], y[1]);
+ *cosx = __kernel_sinf (y[0], y[1], 1);
+ break;
+ }
+ }
+}
+weak_alias (__sincosf, sincosf)