/*- * Copyright (c) 2003 Tim J. Robbins. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <machine/asm.h> __FBSDID("$FreeBSD$"); /* * size_t * wcslen(const wchar_t *s) -- * Find the length of a wide character string. */ ENTRY(wcslen) movl 4(%esp),%ecx /* String */ pushl %ebx xorl %ebx,%ebx xorl %eax,%eax .p2align 4,0x90 L1: cmpl %ebx,(%ecx) jz found0 cmpl %ebx,4(%ecx) jz found1 cmpl %ebx,8(%ecx) jz found2 cmpl %ebx,12(%ecx) jz found3 cmpl %ebx,16(%ecx) jz found4 cmpl %ebx,20(%ecx) jz found5 cmpl %ebx,24(%ecx) jz found6 cmpl %ebx,28(%ecx) jz found7 leal 32(%ecx),%ecx addl $8,%eax jmp L1 found7: incl %eax found6: incl %eax found5: incl %eax found4: incl %eax found3: incl %eax found2: incl %eax found1: incl %eax found0: popl %ebx ret END(wcslen) .section .note.GNU-stack,"",%progbits |