diff options
Diffstat (limited to 'newlib/libc/machine/i386/memchr.S')
| -rw-r--r-- | newlib/libc/machine/i386/memchr.S | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/newlib/libc/machine/i386/memchr.S b/newlib/libc/machine/i386/memchr.S new file mode 100644 index 00000000000..40e29af4f6d --- /dev/null +++ b/newlib/libc/machine/i386/memchr.S @@ -0,0 +1,41 @@ +/* + * ==================================================== + * Copyright (C) 1998 by Cygnus Solutions. All rights reserved. + * + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + + #include "i386mach.h" + + .global SYM (memchr) + +SYM (memchr): + pushl ebp + movl esp,ebp + pushl edi + movl 12(ebp),eax + movl 16(ebp),ecx + movl 8(ebp),edi + + xorl edx,edx + testl ecx,ecx + jz L1 + + cld + repnz + scasb + + setnz dl + decl edi + decl edx + andl edi,edx +L1: + movl edx,eax + + leal -4(ebp),esp + popl edi + leave + ret |