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Diffstat (limited to 'sysdeps/sparc/sparc32/stpcpy.S')
| -rw-r--r-- | sysdeps/sparc/sparc32/stpcpy.S | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/sysdeps/sparc/sparc32/stpcpy.S b/sysdeps/sparc/sparc32/stpcpy.S deleted file mode 100644 index 2cbd69c3b4..0000000000 --- a/sysdeps/sparc/sparc32/stpcpy.S +++ /dev/null @@ -1,166 +0,0 @@ -/* Copy SRC to DEST returning the address of the terminating '\0' in DEST. - 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>. - - 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> - - /* Normally, this uses ((xword - 0x01010101) & 0x80808080) test - to find out if any byte in xword could be zero. This is fast, but - also gives false alarm for any byte in range 0x81-0xff. It does - not matter for correctness, as if this test tells us there could - be some zero byte, we check it byte by byte, but if bytes with - high bits set are common in the strings, then this will give poor - performance. You can #define EIGHTBIT_NOT_RARE and the algorithm - will use one tick slower, but more precise test - ((xword - 0x01010101) & (~xword) & 0x80808080), - which does not give any false alarms (but if some bits are set, - one cannot assume from it which bytes are zero and which are not). - It is yet to be measured, what is the correct default for glibc - in these days for an average user. - */ - - .text - .align 4 - -ENTRY(__stpcpy) - andcc %o1, 3, %g0 - be 20f - sethi %hi(0x80808080), %o4 - - ldub [%o1], %o5 - stb %o5, [%o0] - cmp %o5, 0 - add %o0, 1, %o0 - be 1f - add %o1, 1, %o1 - andcc %o1, 3, %g0 - be 4f - or %o4, %lo(0x80808080), %o3 - ldub [%o1], %o5 - stb %o5, [%o0] - cmp %o5, 0 - add %o0, 1, %o0 - be 1f - add %o1, 1, %o1 - andcc %o1, 3, %g0 - be 5f - sethi %hi(0x01010101), %o4 - ldub [%o1], %o5 - stb %o5, [%o0] - cmp %o5, 0 - add %o0, 1, %o0 - be 1f - add %o1, 1, %o1 - b 6f - or %o4, %lo(0x01010101), %o2 -1: retl - add %o0, -1, %o0 - -20: or %o4, %lo(0x80808080), %o3 -4: sethi %hi(0x01010101), %o4 -5: or %o4, %lo(0x01010101), %o2 -6: andcc %o0, 3, %g0 - bne 16f - sub %g0, 4, %g1 - -11: add %g1, 4, %g1 - ld [%o1 + %g1], %o5 - sub %o5, %o2, %o4 -#ifdef EIGHTBIT_NOT_RARE - andn %o4, %o5, %o4 -#endif - andcc %o4, %o3, %g0 - be,a 11b - st %o5, [%o0 + %g1] - - /* Check every byte. */ - srl %o5, 24, %g5 - andcc %g5, 0xff, %g0 - be 14f - srl %o5, 16, %g5 - andcc %g5, 0xff, %g0 - be 13f - srl %o5, 8, %g5 - andcc %g5, 0xff, %g0 - be 12f - andcc %o5, 0xff, %g0 - bne 11b - st %o5, [%o0 + %g1] - add %o0, %g1, %o0 - retl - add %o0, 3, %o0 -12: srl %o5, 16, %o5 - sth %o5, [%o0 + %g1] - add %g1, 2, %g1 - stb %g0, [%o0 + %g1] - retl - add %o0, %g1, %o0 -13: srl %o5, 16, %o5 - sth %o5, [%o0 + %g1] - add %g1, 1, %g1 - retl - add %o0, %g1, %o0 -14: stb %g0, [%o0 + %g1] - retl - add %o0, %g1, %o0 - -15: srl %o5, 24, %o4 - srl %o5, 16, %g1 - stb %o4, [%o0] - srl %o5, 8, %g4 - stb %g1, [%o0 + 1] - stb %g4, [%o0 + 2] - stb %o5, [%o0 + 3] - add %o0, 4, %o0 -16: ld [%o1], %o5 - sub %o5, %o2, %o4 - andcc %o4, %o3, %g0 - be 15b - add %o1, 4, %o1 - - /* Check every byte. */ - srl %o5, 24, %g5 - andcc %g5, 0xff, %g4 - be 19f - stb %g4, [%o0] - srl %o5, 16, %g5 - andcc %g5, 0xff, %g4 - be 18f - stb %g4, [%o0 + 1] - srl %o5, 8, %g5 - andcc %g5, 0xff, %g4 - be 17f - stb %g4, [%o0 + 2] - andcc %o5, 0xff, %g4 - stb %g4, [%o0 + 3] - bne 16b - add %o0, 4, %o0 - retl - sub %o0, 1, %o0 -17: retl - add %o0, 2, %o0 -18: retl - add %o0, 1, %o0 -19: retl - nop -END(__stpcpy) - -weak_alias (__stpcpy, stpcpy) -libc_hidden_def (__stpcpy) -libc_hidden_builtin_def (stpcpy) |