diff options
| author | svn2git <svn2git@FreeBSD.org> | 1994-07-01 08:00:00 +0000 |
|---|---|---|
| committer | svn2git <svn2git@FreeBSD.org> | 1994-07-01 08:00:00 +0000 |
| commit | 5e0e9b99dc3fc0ecd49d929db0d57c784b66f481 (patch) | |
| tree | e779b5a6edddbb949b7990751b12d6f25304ba86 /lib/libc/i386/string/strncmp.S | |
| parent | a16f65c7d117419bd266c28a1901ef129a337569 (diff) | |
Diffstat (limited to 'lib/libc/i386/string/strncmp.S')
| -rw-r--r-- | lib/libc/i386/string/strncmp.S | 69 |
1 files changed, 35 insertions, 34 deletions
diff --git a/lib/libc/i386/string/strncmp.S b/lib/libc/i386/string/strncmp.S index 72922fb30fec..a4df8025bfb5 100644 --- a/lib/libc/i386/string/strncmp.S +++ b/lib/libc/i386/string/strncmp.S @@ -1,5 +1,5 @@ /* - * Copyright (c) 1993 Winning Strategies, Inc. + * Copyright (c) 1993,94 Winning Strategies, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -14,7 +14,7 @@ * must display the following acknowledgement: * This product includes software developed by Winning Strategies, Inc. * 4. The name of the author may not be used to endorse or promote products - * derived from this software withough specific prior written permission + * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES @@ -27,20 +27,20 @@ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * - * $Id: strncmp.S,v 1.1.2.1 1994/03/07 02:19:33 rgrimes Exp $ + * $Id: strncmp.S,v 1.3 1994/03/31 14:11:02 davidg Exp $ */ #if defined(LIBC_RCS) && !defined(lint) - .asciz "$Id: strncmp.S,v 1.1.2.1 1994/03/07 02:19:33 rgrimes Exp $" + .asciz "$Id: strncmp.S,v 1.3 1994/03/31 14:11:02 davidg Exp $" #endif /* LIBC_RCS and not lint */ #include "DEFS.h" /* - * strncmp(s1, s2, n) - * return an integer greater than, equal to, or less than 0, + * strncmp(s1, s2, n) + * return an integer greater than, equal to, or less than 0, * according as the first n characters of string s1 is greater - * than, equal to, or less than the string s2. + * than, equal to, or less than the string s2. * * %eax - pointer to s1 * %ecx - pointer to s2 @@ -53,7 +53,7 @@ /* * I've unrolled the loop eight times: large enough to make a * significant difference, and small enough not to totally trash the - * cashe. + * cache. */ ENTRY(strncmp) @@ -61,92 +61,93 @@ ENTRY(strncmp) movl 8(%esp),%eax movl 12(%esp),%ecx movl 16(%esp),%edx + testl %edx,%edx jmp L2 /* Jump into the loop! */ .align 2,0x90 L1: incl %eax incl %ecx decl %edx -L2: testl %edx,%edx /* Have we compared n chars yet? */ - jle L4 /* Yes, strings are equal */ +L2: jz L4 /* strings are equal */ movb (%eax),%bl testb %bl,%bl - je L3 + jz L3 cmpb %bl,(%ecx) jne L3 + incl %eax incl %ecx decl %edx - testl %edx,%edx - jle L4 + jz L4 movb (%eax),%bl testb %bl,%bl - je L3 + jz L3 cmpb %bl,(%ecx) jne L3 + incl %eax incl %ecx decl %edx - testl %edx,%edx - jle L4 + jz L4 movb (%eax),%bl testb %bl,%bl - je L3 + jz L3 cmpb %bl,(%ecx) jne L3 + incl %eax incl %ecx decl %edx - testl %edx,%edx - jle L4 + jz L4 movb (%eax),%bl testb %bl,%bl - je L3 + jz L3 cmpb %bl,(%ecx) jne L3 + incl %eax incl %ecx decl %edx - testl %edx,%edx - jle L4 + jz L4 movb (%eax),%bl testb %bl,%bl - je L3 + jz L3 cmpb %bl,(%ecx) jne L3 + incl %eax incl %ecx decl %edx - testl %edx,%edx - jle L4 + jz L4 movb (%eax),%bl testb %bl,%bl - je L3 + jz L3 cmpb %bl,(%ecx) jne L3 + incl %eax incl %ecx decl %edx - testl %edx,%edx - jle L4 + jz L4 movb (%eax),%bl testb %bl,%bl - je L3 + jz L3 cmpb %bl,(%ecx) jne L3 + incl %eax incl %ecx decl %edx - testl %edx,%edx - jle L4 + jz L4 movb (%eax),%bl testb %bl,%bl - je L3 + jz L3 cmpb %bl,(%ecx) je L1 + .align 2,0x90 -L3: movzbl (%eax),%eax /* unsigned comparision */ - movzbl (%ecx),%ecx +L3: movzbl (%eax),%eax /* unsigned comparision */ + movzbl (%ecx),%ecx subl %ecx,%eax popl %ebx ret |