summaryrefslogtreecommitdiff
path: root/sysdeps/m68k/fpu/s_ccos.c
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/m68k/fpu/s_ccos.c')
-rw-r--r--sysdeps/m68k/fpu/s_ccos.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/sysdeps/m68k/fpu/s_ccos.c b/sysdeps/m68k/fpu/s_ccos.c
new file mode 100644
index 0000000000..53f8286b14
--- /dev/null
+++ b/sysdeps/m68k/fpu/s_ccos.c
@@ -0,0 +1,73 @@
+/* Complex cosine function. m68k fpu version
+ Copyright (C) 1997 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>.
+
+ 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. */
+
+#define __LIBC_M81_MATH_INLINES
+#include <complex.h>
+#include <math.h>
+
+#ifndef SUFF
+#define SUFF
+#endif
+#ifndef float_type
+#define float_type double
+#endif
+
+#define CONCATX(a,b) __CONCAT(a,b)
+#define s(name) CONCATX(name,SUFF)
+#define m81(func) __m81_u(s(func))
+
+__complex__ float_type
+s(__ccos) (__complex__ float_type x)
+{
+ __complex__ float_type retval;
+ unsigned long rx_cond = __m81_test (__real__ x);
+
+ if ((rx_cond & (__M81_COND_INF|__M81_COND_NAN)) == 0)
+ {
+ /* Real part is finite. */
+ float_type sin_rx, cos_rx;
+
+ __asm ("fsincos%.x %2,%1:%0" : "=f" (sin_rx), "=f" (cos_rx)
+ : "f" (__real__ x));
+ __real__ retval = cos_rx * m81(__ieee754_cosh) (__imag__ x);
+ if (rx_cond & __M81_COND_ZERO)
+ __imag__ retval = (m81(__signbit) (__imag__ x)
+ ? __real__ x : -__real__ x);
+ else
+ __imag__ retval = -sin_rx * m81(__ieee754_sinh) (__imag__ x);
+ }
+ else
+ {
+ unsigned long ix_cond = __m81_test (__imag__ x);
+
+ if (ix_cond & __M81_COND_INF)
+ __real__ retval = s(fabs) (__imag__ x);
+ else
+ __real__ retval = __real__ x - __real__ x;
+ if (ix_cond & __M81_COND_ZERO)
+ __imag__ retval = __imag__ x;
+ else
+ __imag__ retval = __real__ x - __real__ x;
+ }
+
+ return retval;
+}
+#define weak_aliasx(a,b) weak_alias(a,b)
+weak_aliasx (s(__ccos), s(ccos))