diff options
Diffstat (limited to 'REORG.TODO/sysdeps/sparc/sparc64/strlen.S')
-rw-r--r-- | REORG.TODO/sysdeps/sparc/sparc64/strlen.S | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/sparc/sparc64/strlen.S b/REORG.TODO/sysdeps/sparc/sparc64/strlen.S new file mode 100644 index 0000000000..25a63df03a --- /dev/null +++ b/REORG.TODO/sysdeps/sparc/sparc64/strlen.S @@ -0,0 +1,85 @@ +/* Determine the length of a string. For SPARC v9. + Copyright (C) 1998-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Jan Vondrak <jvon4518@ss1000.ms.mff.cuni.cz>, + 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> + + .register %g2, #scratch + .register %g3, #scratch + + .text + .align 32 +ENTRY(strlen) + mov %o0, %o1 + andn %o0, 0x7, %o0 + + ldx [%o0], %o5 + and %o1, 0x7, %g1 + mov -1, %g5 + + sethi %hi(0x01010101), %o2 + sll %g1, 3, %g1 + + or %o2, %lo(0x01010101), %o2 + srlx %g5, %g1, %o3 + + sllx %o2, 32, %g1 + sethi %hi(0x0000ff00), %g5 + + orn %o5, %o3, %o5 + or %o2, %g1, %o2 + + sllx %o2, 7, %o3 +10: add %o0, 8, %o0 + + andn %o3, %o5, %g1 + sub %o5, %o2, %g2 + + andcc %g1, %g2, %g0 + be,a,pt %xcc, 10b + ldx [%o0], %o5 + srlx %o5, 32, %g1 + + andn %o3, %g1, %o4 + sub %g1, %o2, %g2 + + add %o0, 4, %g3 + andcc %o4, %g2, %g0 + movne %icc, %g1, %o5 + + move %icc, %g3, %o0 + or %g5, %lo(0x0000ff00), %g5 + mov 3 - 8, %g2 + + andcc %o5, %g5, %g0 + srlx %o5, 16, %g1 + move %icc, 2 - 8, %g2 + + andcc %g1, 0xff, %g0 + srl %o5, 24, %o5 + move %icc, 1 - 8, %g2 + + movrz %o5, 0 - 8, %g2 + sub %o0, %o1, %o0 + + retl + add %o0, %g2, %o0 +END(strlen) +libc_hidden_builtin_def (strlen) |