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update from main archive 961010

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This commit is contained in:
Ulrich Drepper 1996-10-11 03:12:39 +00:00
parent 81e25b608d
commit 05e860710a
3 changed files with 18 additions and 100 deletions
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84
sysdeps/alpha/strchr.c
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@ -1,84 +0,0 @@
/* Copyright (C) 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
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., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <string.h>
/* Return the length of the null-terminated string STR. Scan for
the null terminator quickly by testing eight bytes at a time. */
char *
strchr (const char *str, int c)
{
const char *char_ptr;
const unsigned long int *longword_ptr;
unsigned long int charmask;
c = (unsigned char) c;
/* Handle the first few characters by reading one character at a time.
Do this until STR is aligned on a 8-byte border. */
for (char_ptr = str; ((unsigned long int) char_ptr & 7) != 0; ++char_ptr)
if (*char_ptr == c)
return (char *) char_ptr;
else if (*char_ptr == '\0')
return NULL;
longword_ptr = (unsigned long int *) char_ptr;
/* Set up a longword, each of whose bytes is C. */
charmask = c | (c << 8);
charmask |= charmask << 16;
charmask |= charmask << 32;
for (;;)
{
const unsigned long int longword = *longword_ptr++;
int ge, le, zero;
/* Set bits in ZERO if bytes in LONGWORD are zero. */
asm ("cmpbge $31, %1, %0" : "=r" (zero) : "r" (longword));
/* Set bits in GE if bytes in CHARMASK are >= bytes in LONGWORD. */
asm ("cmpbge %1, %2, %0" : "=r" (ge) : "r" (charmask), "r" (longword));
/* Set bits in LE if bytes in CHARMASK are <= bytes in LONGWORD. */
asm ("cmpbge %2, %1, %0" : "=r" (le) : "r" (charmask), "r" (longword));
/* Bytes that are both <= and >= are == to C. */
if (zero || (ge & le))
{
/* Which of the bytes was the C? */
char *cp = (char *) (longword_ptr - 1);
int i;
for (i = 0; i < 8; i++)
{
if (cp[i] == c)
return &cp[i];
if (cp[i] == 0)
return NULL;
}
return NULL;
}
}
}
#ifdef weak_alias
#undef index
weak_alias (strchr, index)
#endif

13
sysdeps/alpha/stxcpy.S
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@ -290,18 +290,19 @@ $unaligned:
negq t7, t6 # .. e1 : build bitmask of bytes <= zero
and t6, t7, t8 # e0 :
nop # .. e1 :
and a1, 7, t5 # .. e1 :
subq t8, 1, t6 # e0 :
or t6, t8, t7 # e1 :
srl t8, t5, t8 # e0 : adjust final null return value
zapnot t2, t7, t2 # e0 : prepare source word; mirror changes
zapnot t2, t7, t2 # .. e1 : prepare source word; mirror changes
and t1, t2, t1 # e1 : to source validity mask
extql t2, a1, t2 # e0 :
extql t2, a1, t2 # .. e0 :
extql t1, a1, t1 # e0 :
andnot t0, t2, t0 # e0 : zero place for source to reside
andnot t0, t2, t0 # .. e1 : zero place for source to reside
or t0, t1, t1 # e1 : and put it there
stq_u t1, 0(a0) # e0 :
ret (t9) # .. e1 :
stq_u t1, 0(a0) # .. e0 :
ret (t9)
.end __stxcpy

1
sysdeps/unix/sysv/linux/alpha/brk.S
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@ -21,6 +21,7 @@ error. Instead, the error condition is indicated by returning the old
break value (instead of the new, requested one). */
#include <sysdep.h>
#define _ERRNO_H
#include <errnos.h>
#ifdef PIC