b6cbf7203b
This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
90 lines
2.1 KiB
C
90 lines
2.1 KiB
C
/* $NetBSD: gmisc.c,v 1.3 2006/03/11 18:38:14 kleink Exp $ */
|
|
|
|
/****************************************************************
|
|
|
|
The author of this software is David M. Gay.
|
|
|
|
Copyright (C) 1998 by Lucent Technologies
|
|
All Rights Reserved
|
|
|
|
Permission to use, copy, modify, and distribute this software and
|
|
its documentation for any purpose and without fee is hereby
|
|
granted, provided that the above copyright notice appear in all
|
|
copies and that both that the copyright notice and this
|
|
permission notice and warranty disclaimer appear in supporting
|
|
documentation, and that the name of Lucent or any of its entities
|
|
not be used in advertising or publicity pertaining to
|
|
distribution of the software without specific, written prior
|
|
permission.
|
|
|
|
LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
|
|
IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
|
|
SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
|
|
IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
|
|
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
|
|
THIS SOFTWARE.
|
|
|
|
****************************************************************/
|
|
|
|
/* Please send bug reports to David M. Gay (dmg at acm dot org,
|
|
* with " at " changed at "@" and " dot " changed to "."). */
|
|
|
|
#include "gdtoaimp.h"
|
|
|
|
void
|
|
#ifdef KR_headers
|
|
rshift(b, k) Bigint *b; int k;
|
|
#else
|
|
rshift(Bigint *b, int k)
|
|
#endif
|
|
{
|
|
ULong *x, *x1, *xe, y;
|
|
int n;
|
|
|
|
x = x1 = b->x;
|
|
n = (unsigned int)k >> kshift;
|
|
if (n < b->wds) {
|
|
xe = x + b->wds;
|
|
x += n;
|
|
if (k &= kmask) {
|
|
n = ULbits - k;
|
|
y = *x++ >> k;
|
|
while(x < xe) {
|
|
*x1++ = (y | (*x << n)) & ALL_ON;
|
|
y = *x++ >> k;
|
|
}
|
|
if ((*x1 = y) !=0)
|
|
x1++;
|
|
}
|
|
else
|
|
while(x < xe)
|
|
*x1++ = *x++;
|
|
}
|
|
if ((b->wds = x1 - b->x) == 0)
|
|
b->x[0] = 0;
|
|
}
|
|
|
|
int
|
|
#ifdef KR_headers
|
|
trailz(b) CONST Bigint *b;
|
|
#else
|
|
trailz(CONST Bigint *b)
|
|
#endif
|
|
{
|
|
ULong L;
|
|
CONST ULong *x, *xe;
|
|
int n = 0;
|
|
|
|
x = b->x;
|
|
xe = x + b->wds;
|
|
for(n = 0; x < xe && !*x; x++)
|
|
n += ULbits;
|
|
if (x < xe) {
|
|
L = *x;
|
|
n += lo0bits(&L);
|
|
}
|
|
return n;
|
|
}
|