mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-14 01:00:07 +00:00
f7eac6eb50
* Makeconfig ($(common-objpfx)config.make): Depend on config.h.in. Mon Mar 4 17:35:09 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu> * hurd/catch-signal.c (hurd_safe_memmove): New function. (hurd_safe_copyin, hurd_safe_copyout): New functions. * hurd/hurd/sigpreempt.h: Declare them. Sun Mar 3 08:43:44 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu> Replace math code with fdlibm from Sun as modified for netbsd by JT Conklin and Ian Taylor, including x86 FPU support. * sysdeps/libm-ieee754, sysdeps/libm-i387: New directories. * math/math_private.h: New file. * sysdeps/i386/fpu/Implies: New file. * sysdeps/ieee754/Implies: New file. * math/machine/asm.h, math/machine/endian.h: New files. * math/Makefile, math/math.h: Rewritten. * mathcalls.h, math/mathcalls.h: New file, broken out of math.h. * math/finite.c: File removed. * sysdeps/generic/Makefile [$(subdir)=math]: Frobnication removed. * math/test-math.c: Include errno.h and string.h. * sysdeps/unix/bsd/dirstream.h: File removed. * sysdeps/unix/bsd/readdir.c: File removed.
69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
/* e_sinhf.c -- float version of e_sinh.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: e_sinhf.c,v 1.4 1995/05/10 20:46:15 jtc Exp $";
|
|
#endif
|
|
|
|
#include "math.h"
|
|
#include "math_private.h"
|
|
|
|
#ifdef __STDC__
|
|
static const float one = 1.0, shuge = 1.0e37;
|
|
#else
|
|
static float one = 1.0, shuge = 1.0e37;
|
|
#endif
|
|
|
|
#ifdef __STDC__
|
|
float __ieee754_sinhf(float x)
|
|
#else
|
|
float __ieee754_sinhf(x)
|
|
float x;
|
|
#endif
|
|
{
|
|
float t,w,h;
|
|
int32_t ix,jx;
|
|
|
|
GET_FLOAT_WORD(jx,x);
|
|
ix = jx&0x7fffffff;
|
|
|
|
/* x is INF or NaN */
|
|
if(ix>=0x7f800000) return x+x;
|
|
|
|
h = 0.5;
|
|
if (jx<0) h = -h;
|
|
/* |x| in [0,22], return sign(x)*0.5*(E+E/(E+1))) */
|
|
if (ix < 0x41b00000) { /* |x|<22 */
|
|
if (ix<0x31800000) /* |x|<2**-28 */
|
|
if(shuge+x>one) return x;/* sinh(tiny) = tiny with inexact */
|
|
t = __expm1f(fabsf(x));
|
|
if(ix<0x3f800000) return h*((float)2.0*t-t*t/(t+one));
|
|
return h*(t+t/(t+one));
|
|
}
|
|
|
|
/* |x| in [22, log(maxdouble)] return 0.5*exp(|x|) */
|
|
if (ix < 0x42b17180) return h*__ieee754_expf(fabsf(x));
|
|
|
|
/* |x| in [log(maxdouble), overflowthresold] */
|
|
if (ix<=0x42b2d4fc) {
|
|
w = __ieee754_expf((float)0.5*fabsf(x));
|
|
t = h*w;
|
|
return t*w;
|
|
}
|
|
|
|
/* |x| > overflowthresold, sinh(x) overflow */
|
|
return x*shuge;
|
|
}
|