diff options
| author | Mike Frysinger <vapier@gentoo.org> | 2006-02-04 01:20:54 +0000 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2006-02-04 01:20:54 +0000 |
| commit | c429bf3057c87dd9545fc2d824b5930c52f7dfb8 (patch) | |
| tree | f207534c6a7a16795f8e7a099c1b48180e9db94f /libc/string/ia64/strncmp.S | |
| parent | 798669dc65077f81b6facd2415463a1bda13c4d7 (diff) | |
import files from glibc for an ia64/static port
Diffstat (limited to 'libc/string/ia64/strncmp.S')
| -rw-r--r-- | libc/string/ia64/strncmp.S | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/libc/string/ia64/strncmp.S b/libc/string/ia64/strncmp.S new file mode 100644 index 000000000..915ea5aa2 --- /dev/null +++ b/libc/string/ia64/strncmp.S @@ -0,0 +1,62 @@ +/* Optimized version of the standard strncmp() function. + This file is part of the GNU C Library. + Copyright (C) 2000, 2001, 2003 Free Software Foundation, Inc. + Contributed by Dan Pop <Dan.Pop@cern.ch>. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +/* Return: the result of the comparison + + Inputs: + in0: s1 + in1: s2 + in2: n + + Unlike memcmp(), this function is optimized for mismatches within the + first few characters. */ + +#include <sysdep.h> +#undef ret + +#define s1 in0 +#define s2 in1 +#define n in2 + +#define val1 r15 +#define val2 r16 + + +ENTRY(strncmp) + alloc r2 = ar.pfs, 3, 0, 0, 0 + mov ret0 = r0 + cmp.eq p6, p0 = r0, r0 // set p6 + cmp.eq p7, p0 = n, r0 // return immediately if n == 0 +(p7) br.cond.spnt .restore_and_exit ;; +.loop: + ld1 val1 = [s1], 1 + ld1 val2 = [s2], 1 + adds n = -1, n // n-- + ;; + cmp.ne.and p6, p0 = val1, r0 + cmp.ne.and p6, p0 = val2, r0 + cmp.ne.and p6, p0 = n, r0 + cmp.eq.and p6, p0 = val1, val2 +(p6) br.cond.sptk .loop + sub ret0 = val1, val2 +.restore_and_exit: + br.ret.sptk.many b0 +END(strncmp) +libc_hidden_def (strncmp) |