aboutsummaryrefslogtreecommitdiff
path: root/sysdeps/libm-ieee754/s_tanhf.c
diff options
context:
space:
mode:
authorUlrich Drepper <drepper@redhat.com>1999-07-14 00:54:57 +0000
committerUlrich Drepper <drepper@redhat.com>1999-07-14 00:54:57 +0000
commitabfbdde177c3a7155070dda1b2cdc8292054cc26 (patch)
treee021306b596381fbf8311d2b7eb294e918ff17c8 /sysdeps/libm-ieee754/s_tanhf.c
parent86421aa57ecfd70963ae66848bd6a6dd3b8e0fe6 (diff)
downloadglibc-abfbdde177c3a7155070dda1b2cdc8292054cc26.tar
glibc-abfbdde177c3a7155070dda1b2cdc8292054cc26.tar.gz
glibc-abfbdde177c3a7155070dda1b2cdc8292054cc26.tar.bz2
glibc-abfbdde177c3a7155070dda1b2cdc8292054cc26.zip
Update.
Diffstat (limited to 'sysdeps/libm-ieee754/s_tanhf.c')
-rw-r--r--sysdeps/libm-ieee754/s_tanhf.c67
1 files changed, 0 insertions, 67 deletions
diff --git a/sysdeps/libm-ieee754/s_tanhf.c b/sysdeps/libm-ieee754/s_tanhf.c
deleted file mode 100644
index 2a0ca9f3df..0000000000
--- a/sysdeps/libm-ieee754/s_tanhf.c
+++ /dev/null
@@ -1,67 +0,0 @@
-/* s_tanhf.c -- float version of s_tanh.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
- */
-
-/*
- * ====================================================
- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
- *
- * Developed at SunPro, a Sun Microsystems, Inc. business.
- * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice
- * is preserved.
- * ====================================================
- */
-
-#if defined(LIBM_SCCS) && !defined(lint)
-static char rcsid[] = "$NetBSD: s_tanhf.c,v 1.4 1995/05/10 20:48:24 jtc Exp $";
-#endif
-
-#include "math.h"
-#include "math_private.h"
-
-#ifdef __STDC__
-static const float one=1.0, two=2.0, tiny = 1.0e-30;
-#else
-static float one=1.0, two=2.0, tiny = 1.0e-30;
-#endif
-
-#ifdef __STDC__
- float __tanhf(float x)
-#else
- float __tanhf(x)
- float x;
-#endif
-{
- float t,z;
- int32_t jx,ix;
-
- GET_FLOAT_WORD(jx,x);
- ix = jx&0x7fffffff;
-
- /* x is INF or NaN */
- if(ix>=0x7f800000) {
- if (jx>=0) return one/x+one; /* tanh(+-inf)=+-1 */
- else return one/x-one; /* tanh(NaN) = NaN */
- }
-
- /* |x| < 22 */
- if (ix < 0x41b00000) { /* |x|<22 */
- if (ix == 0)
- return x; /* x == +-0 */
- if (ix<0x24000000) /* |x|<2**-55 */
- return x*(one+x); /* tanh(small) = small */
- if (ix>=0x3f800000) { /* |x|>=1 */
- t = __expm1f(two*fabsf(x));
- z = one - two/(t+two);
- } else {
- t = __expm1f(-two*fabsf(x));
- z= -t/(t+two);
- }
- /* |x| > 22, return +-1 */
- } else {
- z = one - tiny; /* raised inexact flag */
- }
- return (jx>=0)? z: -z;
-}
-weak_alias (__tanhf, tanhf)