diff options
Diffstat (limited to 'REORG.TODO/sysdeps/sparc/sparc32/strlen.S')
-rw-r--r-- | REORG.TODO/sysdeps/sparc/sparc32/strlen.S | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/sparc/sparc32/strlen.S b/REORG.TODO/sysdeps/sparc/sparc32/strlen.S new file mode 100644 index 0000000000..59baee884e --- /dev/null +++ b/REORG.TODO/sysdeps/sparc/sparc32/strlen.S @@ -0,0 +1,75 @@ +/* Determine the length of a string. + For SPARC v7. + Copyright (C) 1996-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Jakub Jelinek <jj@ultra.linux.cz> and + David S. Miller <davem@davemloft.net>. + + 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/>. */ + +#include <sysdep.h> + + .text + .align 4 + +ENTRY(strlen) + mov %o0, %o1 + andn %o0, 0x3, %o0 + + ld [%o0], %o5 + and %o1, 0x3, %g1 + mov -1, %g5 + + sethi %hi(0x01010101), %o2 + sll %g1, 3, %g1 + + or %o2, %lo(0x01010101), %o2 + srl %g5, %g1, %g2 + + orn %o5, %g2, %o5 + sll %o2, 7, %o3 +10: add %o0, 4, %o0 + + andn %o3, %o5, %g1 + sub %o5, %o2, %g2 + + andcc %g1, %g2, %g0 + be,a 10b + ld [%o0], %o5 + + srl %o5, 24, %g1 + + andcc %g1, 0xff, %g0 + be 90f + sub %o0, 4, %o0 + + srl %o5, 16, %g2 + + andcc %g2, 0xff, %g0 + be 90f + add %o0, 1, %o0 + + srl %o5, 8, %g1 + + andcc %g1, 0xff, %g0 + be 90f + add %o0, 1, %o0 + + add %o0, 1, %o0 + +90: retl + sub %o0, %o1, %o0 +END(strlen) +libc_hidden_builtin_def (strlen) |