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Diffstat (limited to 'ports/sysdeps/ia64/strcmp.S')
| -rw-r--r-- | ports/sysdeps/ia64/strcmp.S | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/ports/sysdeps/ia64/strcmp.S b/ports/sysdeps/ia64/strcmp.S new file mode 100644 index 0000000000..c27b6c229b --- /dev/null +++ b/ports/sysdeps/ia64/strcmp.S @@ -0,0 +1,53 @@ +/* Optimized version of the standard strcmp() 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, see + <http://www.gnu.org/licenses/>. */ + +/* Return: the result of the comparison + + Inputs: + in0: s1 + in1: s2 + + 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 val1 r15 +#define val2 r16 + + +ENTRY(strcmp) + alloc r2 = ar.pfs, 2, 0, 0, 0 +.loop: + ld1 val1 = [s1], 1 + ld1 val2 = [s2], 1 + cmp.eq p6, p0 = r0, r0 // set p6 + ;; + cmp.ne.and p6, p0 = val1, r0 + cmp.ne.and p6, p0 = val2, r0 + cmp.eq.and p6, p0 = val1, val2 +(p6) br.cond.sptk .loop + sub ret0 = val1, val2 + br.ret.sptk.many b0 +END(strcmp) +libc_hidden_builtin_def (strcmp) |