mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 05:20:06 +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.
73 lines
1.6 KiB
C
73 lines
1.6 KiB
C
/* s_rintf.c -- float version of s_rint.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_rintf.c,v 1.4 1995/05/10 20:48:06 jtc Exp $";
|
|
#endif
|
|
|
|
#include "math.h"
|
|
#include "math_private.h"
|
|
|
|
#ifdef __STDC__
|
|
static const float
|
|
#else
|
|
static float
|
|
#endif
|
|
TWO23[2]={
|
|
8.3886080000e+06, /* 0x4b000000 */
|
|
-8.3886080000e+06, /* 0xcb000000 */
|
|
};
|
|
|
|
#ifdef __STDC__
|
|
float __rintf(float x)
|
|
#else
|
|
float __rintf(x)
|
|
float x;
|
|
#endif
|
|
{
|
|
int32_t i0,j0,sx;
|
|
u_int32_t i,i1;
|
|
float w,t;
|
|
GET_FLOAT_WORD(i0,x);
|
|
sx = (i0>>31)&1;
|
|
j0 = ((i0>>23)&0xff)-0x7f;
|
|
if(j0<23) {
|
|
if(j0<0) {
|
|
if((i0&0x7fffffff)==0) return x;
|
|
i1 = (i0&0x07fffff);
|
|
i0 &= 0xfff00000;
|
|
i0 |= ((i1|-i1)>>9)&0x400000;
|
|
SET_FLOAT_WORD(x,i0);
|
|
w = TWO23[sx]+x;
|
|
t = w-TWO23[sx];
|
|
GET_FLOAT_WORD(i0,t);
|
|
SET_FLOAT_WORD(t,(i0&0x7fffffff)|(sx<<31));
|
|
return t;
|
|
} else {
|
|
i = (0x007fffff)>>j0;
|
|
if((i0&i)==0) return x; /* x is integral */
|
|
i>>=1;
|
|
if((i0&i)!=0) i0 = (i0&(~i))|((0x100000)>>j0);
|
|
}
|
|
} else {
|
|
if(j0==0x80) return x+x; /* inf or NaN */
|
|
else return x; /* x is integral */
|
|
}
|
|
SET_FLOAT_WORD(x,i0);
|
|
w = TWO23[sx]+x;
|
|
return w-TWO23[sx];
|
|
}
|
|
weak_alias (__rintf, rintf)
|