diff options
Diffstat (limited to 'libc/string/sparc/sparc64/strlen.S')
| -rw-r--r-- | libc/string/sparc/sparc64/strlen.S | 172 |
1 files changed, 0 insertions, 172 deletions
diff --git a/libc/string/sparc/sparc64/strlen.S b/libc/string/sparc/sparc64/strlen.S deleted file mode 100644 index f58c1c232..000000000 --- a/libc/string/sparc/sparc64/strlen.S +++ /dev/null @@ -1,172 +0,0 @@ -/* Determine the length of a string. For SPARC v9. - Copyright (C) 1998, 1999, 2003 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Jan Vondrak <jvon4518@ss1000.ms.mff.cuni.cz> and - 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 <asm/asi.h> - - /* Normally, this uses - ((xword - 0x0101010101010101) & 0x8080808080808080) 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 - 0x0101010101010101) & (~xword) & 0x8080808080808080), - 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 32 -ENTRY(strlen) - sethi %hi(0x01010101), %g1 /* IEU0 Group */ - ldub [%o0], %o3 /* Load */ - or %g1, %lo(0x01010101), %g1 /* IEU0 Group */ - mov %o0, %o1 /* IEU1 */ - - sllx %g1, 32, %g4 /* IEU0 Group */ - andcc %o0, 7, %g0 /* IEU1 */ - or %g1, %g4, %g1 /* IEU0 Group */ - brz,pn %o3, 13f /* CTI+IEU1 */ - - sllx %g1, 7, %g4 /* IEU0 Group */ - bne,a,pn %icc, 15f /* CTI */ - add %o0, 1, %o0 /* IEU1 */ - /* %g1 = 0x0101010101010101 * - * %g4 = 0x8080808080808080 * - * %o0 = string pointer * - * %o1 = start of string */ -1: ldx [%o0], %o3 /* Load Group */ - - add %o0, 8, %o0 /* IEU1 */ -2: sub %o3, %g1, %o2 /* IEU0 Group */ -#ifdef EIGHTBIT_NOT_RARE - andn %o2, %o3, %o5 /* IEU0 Group */ - ldxa [%o0] ASI_PNF, %o3 /* Load */ - andcc %o5, %g4, %g0 /* IEU1 Group */ -#else - ldxa [%o0] ASI_PNF, %o3 /* Load */ - andcc %o2, %g4, %g0 /* IEU1 Group */ -#endif - - be,pt %xcc, 2b /* CTI */ - add %o0, 8, %o0 /* IEU0 */ - addcc %o2, %g1, %g5 /* IEU1 Group */ -#ifdef EIGHTBIT_NOT_RARE - srlx %o5, 32, %o5 /* IEU0 */ - -3: andcc %o5, %g4, %g0 /* IEU1 Group */ -#else - srlx %o2, 32, %o2 /* IEU0 */ - -3: andcc %o2, %g4, %g0 /* IEU1 Group */ -#endif - be,pn %xcc, 4f /* CTI */ - srlx %g5, 56, %o2 /* IEU0 */ - andcc %o2, 0xff, %g0 /* IEU1 Group */ - - be,pn %icc, 12f /* CTI */ - srlx %g5, 48, %o2 /* IEU0 */ - andcc %o2, 0xff, %g0 /* IEU1 Group */ - be,pn %icc, 11f /* CTI */ - - srlx %g5, 40, %o2 /* IEU0 */ - andcc %o2, 0xff, %g0 /* IEU1 Group */ - be,pn %icc, 10f /* CTI */ - srlx %g5, 32, %o2 /* IEU0 */ - - andcc %o2, 0xff, %g0 /* IEU1 Group */ - be,pn %icc, 9f /* CTI */ -4: srlx %g5, 24, %o2 /* IEU0 */ - andcc %o2, 0xff, %g0 /* IEU1 Group */ - - be,pn %icc, 8f /* CTI */ - srlx %g5, 16, %o2 /* IEU0 */ - andcc %o2, 0xff, %g0 /* IEU1 Group */ - be,pn %icc, 7f /* CTI */ - - srlx %g5, 8, %o2 /* IEU0 */ - andcc %o2, 0xff, %g0 /* IEU1 Group */ - be,pn %icc, 6f /* CTI */ - sub %o3, %g1, %o2 /* IEU0 */ - - andcc %g5, 0xff, %g0 /* IEU1 Group */ - be,pn %icc, 5f /* CTI */ - ldxa [%o0] ASI_PNF, %o3 /* Load */ - andcc %o2, %g4, %g0 /* IEU1 Group */ - - be,pt %xcc, 2b /* CTI */ - add %o0, 8, %o0 /* IEU0 */ - addcc %o2, %g1, %g5 /* IEU1 Group */ - ba,pt %xcc, 3b /* CTI */ - - srlx %o2, 32, %o2 /* IEU0 */ -5: add %o0, -9, %o0 /* IEU0 Group */ - retl /* CTI+IEU1 Group */ - sub %o0, %o1, %o0 /* IEU0 */ - -6: add %o0, -10, %o0 /* IEU0 Group */ - retl /* CTI+IEU1 Group */ - sub %o0, %o1, %o0 /* IEU0 */ -7: add %o0, -11, %o0 /* IEU0 Group */ - - retl /* CTI+IEU1 Group */ - sub %o0, %o1, %o0 /* IEU0 */ -8: add %o0, -12, %o0 /* IEU0 Group */ - retl /* CTI+IEU1 Group */ - - sub %o0, %o1, %o0 /* IEU0 */ -9: add %o0, -13, %o0 /* IEU0 Group */ - retl /* CTI+IEU1 Group */ - sub %o0, %o1, %o0 /* IEU0 */ - -10: add %o0, -14, %o0 /* IEU0 Group */ - retl /* CTI+IEU1 Group */ - sub %o0, %o1, %o0 /* IEU0 */ -11: add %o0, -15, %o0 /* IEU0 Group */ - - retl /* CTI+IEU1 Group */ - sub %o0, %o1, %o0 /* IEU0 */ -12: add %o0, -16, %o0 /* IEU0 Group */ - retl /* CTI+IEU1 Group */ - - sub %o0, %o1, %o0 /* IEU0 */ -13: retl /* CTI+IEU1 Group */ - mov 0, %o0 /* IEU0 */ - nop - -15: ldub [%o0], %o3 /* Load Group */ -16: andcc %o0, 7, %g0 /* IEU1 */ - be,pn %icc, 1b /* CTI */ - nop /* IEU0 Group */ - - add %o0, 1, %o0 /* IEU1 */ - andcc %o3, 0xff, %g0 /* IEU1 Group */ - bne,a,pt %icc, 16b /* CTI */ - lduba [%o0] ASI_PNF, %o3 /* Load */ - - add %o0, -1, %o0 /* IEU0 Group */ - retl /* CTI+IEU1 Group */ - sub %o0, %o1, %o0 /* IEU0 */ -END(strlen) -libc_hidden_def(strlen) |