~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/parisc/lib/memset.c

Version: ~ [ linux-5.8 ] ~ [ linux-5.7.12 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.55 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.136 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.191 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.232 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.232 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /* Copyright (C) 1991, 1997 Free Software Foundation, Inc.
  2    This file is part of the GNU C Library.
  3 
  4    The GNU C Library is free software; you can redistribute it and/or
  5    modify it under the terms of the GNU Lesser General Public
  6    License as published by the Free Software Foundation; either
  7    version 2.1 of the License, or (at your option) any later version.
  8 
  9    The GNU C Library is distributed in the hope that it will be useful,
 10    but WITHOUT ANY WARRANTY; without even the implied warranty of
 11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 12    Lesser General Public License for more details.
 13 
 14    You should have received a copy of the GNU Lesser General Public
 15    License along with the GNU C Library; if not, write to the Free
 16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 17    02111-1307 USA.  */
 18 
 19 /* Slight modifications for pa-risc linux - Paul Bame <bame@debian.org> */
 20 
 21 #include <linux/types.h>
 22 #include <asm/string.h>
 23 
 24 #define OPSIZ (BITS_PER_LONG/8)
 25 typedef unsigned long op_t;
 26 
 27 void *
 28 memset (void *dstpp, int sc, size_t len)
 29 {
 30   unsigned int c = sc;
 31   long int dstp = (long int) dstpp;
 32 
 33   if (len >= 8)
 34     {
 35       size_t xlen;
 36       op_t cccc;
 37 
 38       cccc = (unsigned char) c;
 39       cccc |= cccc << 8;
 40       cccc |= cccc << 16;
 41       if (OPSIZ > 4)
 42         /* Do the shift in two steps to avoid warning if long has 32 bits.  */
 43         cccc |= (cccc << 16) << 16;
 44 
 45       /* There are at least some bytes to set.
 46          No need to test for LEN == 0 in this alignment loop.  */
 47       while (dstp % OPSIZ != 0)
 48         {
 49           ((unsigned char *) dstp)[0] = c;
 50           dstp += 1;
 51           len -= 1;
 52         }
 53 
 54       /* Write 8 `op_t' per iteration until less than 8 `op_t' remain.  */
 55       xlen = len / (OPSIZ * 8);
 56       while (xlen > 0)
 57         {
 58           ((op_t *) dstp)[0] = cccc;
 59           ((op_t *) dstp)[1] = cccc;
 60           ((op_t *) dstp)[2] = cccc;
 61           ((op_t *) dstp)[3] = cccc;
 62           ((op_t *) dstp)[4] = cccc;
 63           ((op_t *) dstp)[5] = cccc;
 64           ((op_t *) dstp)[6] = cccc;
 65           ((op_t *) dstp)[7] = cccc;
 66           dstp += 8 * OPSIZ;
 67           xlen -= 1;
 68         }
 69       len %= OPSIZ * 8;
 70 
 71       /* Write 1 `op_t' per iteration until less than OPSIZ bytes remain.  */
 72       xlen = len / OPSIZ;
 73       while (xlen > 0)
 74         {
 75           ((op_t *) dstp)[0] = cccc;
 76           dstp += OPSIZ;
 77           xlen -= 1;
 78         }
 79       len %= OPSIZ;
 80     }
 81 
 82   /* Write the last few bytes.  */
 83   while (len > 0)
 84     {
 85       ((unsigned char *) dstp)[0] = c;
 86       dstp += 1;
 87       len -= 1;
 88     }
 89 
 90   return dstpp;
 91 }
 92 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp