Release 4.14 arch/m68k/lib/memset.c

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive
 * for more details.
 */

#include <linux/module.h>
#include <linux/string.h>



void *memset(void *s, int c, size_t count)
{
	void *xs = s;
	size_t temp;

	if (!count)
		return xs;
	c &= 0xff;
	c |= c << 8;
	c |= c << 16;
	if ((long)s & 1) {
		char *cs = s;
		*cs++ = c;
		s = cs;
		count--;
	}
	if (count > 2 && (long)s & 2) {
		short *ss = s;
		*ss++ = c;
		s = ss;
		count -= 2;
	}
	temp = count >> 2;
	if (temp) {
		long *ls = s;
#if defined(CONFIG_M68000) || defined(CONFIG_COLDFIRE)
		for (; temp; temp--)
			*ls++ = c;
#else
		size_t temp1;
		asm volatile (
                        "       movel %1,%2\n"
                        "       andw  #7,%2\n"
                        "       lsrl  #3,%1\n"
                        "       negw  %2\n"
                        "       jmp   %%pc@(2f,%2:w:2)\n"
                        "1:     movel %3,%0@+\n"
                        "       movel %3,%0@+\n"
                        "       movel %3,%0@+\n"
                        "       movel %3,%0@+\n"
                        "       movel %3,%0@+\n"
                        "       movel %3,%0@+\n"
                        "       movel %3,%0@+\n"
                        "       movel %3,%0@+\n"
                        "2:     dbra  %1,1b\n"
                        "       clrw  %1\n"
                        "       subql #1,%1\n"
                        "       jpl   1b"
                        : "=a" (ls), "=d" (temp), "=&d" (temp1)
                        : "d" (c), "0" (ls), "1" (temp));
#endif
		s = ls;
	}
	if (count & 2) {
		short *ss = s;
		*ss++ = c;
		s = ss;
	}
	if (count & 1) {
		char *cs = s;
		*cs = c;
	}
	return xs;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
196
90.32%
1
33.33%
Greg Ungerer
21
9.68%
2
66.67%
Total
217
100.00%
3
100.00%


EXPORT_SYMBOL(memset);
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
198
86.46%
1
33.33%
Greg Ungerer
31
13.54%
2
66.67%
Total
229
100.00%
3
100.00%
Directory: arch/m68k/lib

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