| /* stpncpy(DST, SRC, COUNT) - Copy no more than N characters of |
| SRC to DEST, returning the address of the terminating '\0' in |
| DEST, if any, or else DEST + N. |
| For SPARC v9. |
| Copyright (C) 1998, 1999, 2002, 2003 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Jakub Jelinek <jj@ultra.linux.cz> and |
| Jan Vondrak <jvon4518@ss1000.ms.mff.cuni.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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #include <sysdep.h> |
| #include <asm/asi.h> |
| #ifndef XCC |
| #define XCC xcc |
| #define USE_BPR |
| .register %g2, #scratch |
| .register %g3, #scratch |
| .register %g6, #scratch |
| #endif |
| |
| /* 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(__stpncpy) |
| sethi %hi(0x01010101), %g1 /* IEU0 Group */ |
| #ifdef USE_BPR |
| brz,pn %o2, 19f /* CTI+IEU1 */ |
| #else |
| tst %o2 /* IEU1 */ |
| be,pn %XCC, 19f /* CTI */ |
| #endif |
| or %g1, %lo(0x01010101), %g1 /* IEU1 */ |
| andcc %o0, 7, %g0 /* IEU1 Group */ |
| |
| sllx %g1, 32, %g2 /* IEU0 */ |
| bne,pn %icc, 26f /* CTI */ |
| or %g1, %g2, %g1 /* IEU0 Group */ |
| andcc %o1, 7, %g3 /* IEU1 */ |
| |
| bne,pn %icc, 28f /* CTI */ |
| sllx %g1, 7, %g2 /* IEU0 Group */ |
| ldx [%o1], %o3 /* Load */ |
| 1: add %o1, 8, %o1 /* IEU1 */ |
| |
| 2: subcc %o2, 8, %o2 /* IEU1 Group */ |
| bl,pn %XCC, 18f /* CTI */ |
| sub %o3, %g1, %o4 /* IEU0 */ |
| add %o0, 8, %o0 /* IEU0 Group */ |
| |
| #ifdef EIGHTBIT_NOT_MORE |
| andn %o4, %o3, %o4 /* IEU1 */ |
| #endif |
| mov %o3, %g3 /* IEU1 */ |
| ldxa [%o1] ASI_PNF, %o3 /* Load */ |
| add %o1, 8, %o1 /* IEU0 Group */ |
| andcc %o4, %g2, %g0 /* IEU1 */ |
| |
| be,a,pt %xcc, 2b /* CTI */ |
| stx %g3, [%o0-8] /* Store Group */ |
| srlx %g3, 56, %g5 /* IEU0 Group */ |
| andcc %g5, 0xff, %g0 /* IEU1 Group */ |
| |
| be,pn %icc, 16f /* CTI */ |
| srlx %g3, 48, %g4 /* IEU0 */ |
| andcc %g4, 0xff, %g0 /* IEU1 Group */ |
| be,pn %icc, 15f /* CTI */ |
| |
| srlx %g3, 40, %g5 /* IEU0 */ |
| andcc %g5, 0xff, %g0 /* IEU1 Group */ |
| be,pn %icc, 14f /* CTI */ |
| srlx %g3, 32, %g4 /* IEU0 */ |
| |
| andcc %g4, 0xff, %g0 /* IEU1 Group */ |
| be,pn %icc, 13f /* CTI */ |
| srlx %g3, 24, %g5 /* IEU0 */ |
| andcc %g5, 0xff, %g0 /* IEU1 Group */ |
| |
| be,pn %icc, 12f /* CTI */ |
| srlx %g3, 16, %g4 /* IEU0 */ |
| andcc %g4, 0xff, %g0 /* IEU1 Group */ |
| be,pn %icc, 11f /* CTI */ |
| |
| srlx %g3, 8, %g5 /* IEU0 */ |
| andcc %g5, 0xff, %g0 /* IEU1 Group */ |
| be,pn %icc, 10f /* CTI */ |
| sub %o0, 1, %g6 /* IEU0 */ |
| |
| andcc %g3, 0xff, %g0 /* IEU1 Group */ |
| bne,pt %icc, 2b /* CTI */ |
| 3: stx %g3, [%o0-8] /* Store */ |
| andncc %o2, 31, %g3 /* IEU1 Group */ |
| |
| 4: be,pn %XCC, 41f /* CTI */ |
| and %o2, 31, %o2 /* IEU1 Group */ |
| 40: stx %g0, [%o0] /* Store */ |
| stx %g0, [%o0 + 8] /* Store Group */ |
| |
| subcc %g3, 32, %g3 /* IEU1 */ |
| stx %g0, [%o0 + 16] /* Store Group */ |
| stx %g0, [%o0 + 24] /* Store Group */ |
| bne,pt %XCC, 40b /* CTI */ |
| |
| add %o0, 32, %o0 /* IEU0 */ |
| 41: subcc %o2, 8, %o2 /* IEU1 Group */ |
| bl,a,pn %XCC, 6f /* CTI */ |
| andcc %o2, 4, %g0 /* IEU1 Group */ |
| |
| 5: stx %g0, [%o0] /* Store */ |
| subcc %o2, 8, %o2 /* IEU1 Group */ |
| bge,pt %XCC, 5b /* CTI */ |
| add %o0, 8, %o0 /* IEU0 */ |
| |
| andcc %o2, 4, %g0 /* IEU1 Group */ |
| 6: be,a,pn %icc, 7f /* CTI */ |
| andcc %o2, 2, %g0 /* IEU1 Group */ |
| stw %g0, [%o0] /* Store */ |
| |
| add %o0, 4, %o0 /* IEU0 */ |
| andcc %o2, 2, %g0 /* IEU1 Group */ |
| 7: be,a,pn %icc, 8f /* CTI */ |
| andcc %o2, 1, %g0 /* IEU1 Group */ |
| |
| sth %g0, [%o0] /* Store */ |
| add %o0, 2, %o0 /* IEU0 */ |
| andcc %o2, 1, %g0 /* IEU1 Group */ |
| 8: bne,a,pn %icc, 9f /* CTI */ |
| |
| stb %g0, [%o0] /* Store */ |
| 9: retl /* CTI+IEU1 Group */ |
| mov %g6, %o0 /* IEU0 */ |
| 10: subcc %o0, 2, %g6 /* IEU1 Group */ |
| |
| ba,pt %xcc, 3b /* CTI */ |
| sllx %g5, 8, %g3 /* IEU0 */ |
| 11: subcc %o0, 3, %g6 /* IEU1 Group */ |
| ba,pt %xcc, 3b /* CTI */ |
| |
| sllx %g4, 16, %g3 /* IEU0 */ |
| 12: subcc %o0, 4, %g6 /* IEU1 Group */ |
| ba,pt %xcc, 3b /* CTI */ |
| sllx %g5, 24, %g3 /* IEU0 */ |
| |
| 13: subcc %o0, 5, %g6 /* IEU1 Group */ |
| ba,pt %xcc, 3b /* CTI */ |
| sllx %g4, 32, %g3 /* IEU0 */ |
| 14: subcc %o0, 6, %g6 /* IEU1 Group */ |
| |
| ba,pt %xcc, 3b /* CTI */ |
| sllx %g5, 40, %g3 /* IEU0 */ |
| 15: subcc %o0, 7, %g6 /* IEU1 Group */ |
| ba,pt %xcc, 3b /* CTI */ |
| |
| sllx %g4, 48, %g3 /* IEU0 */ |
| 16: subcc %o0, 8, %g6 /* IEU1 Group */ |
| ba,pt %xcc, 3b /* CTI */ |
| clr %g3 /* IEU0 */ |
| |
| .align 16 |
| 17: or %o3, %o4, %o3 /* IEU0 Group */ |
| sub %o3, %g1, %o4 /* IEU1 */ |
| 18: addcc %o2, 8, %o2 /* IEU1 Group */ |
| be,pn %XCC, 19f /* CTI */ |
| |
| andcc %o4, %g2, %g0 /* IEU1 Group */ |
| be,pt %xcc, 21f /* CTI */ |
| srlx %o3, 56, %g5 /* IEU0 */ |
| andcc %g5, 0xff, %g0 /* IEU1 Group */ |
| |
| be,pn %icc, 20f /* CTI */ |
| stb %g5, [%o0] /* Store */ |
| add %o0, 1, %o0 /* IEU0 Group */ |
| subcc %o2, 1, %o2 /* IEU1 */ |
| |
| be,pn %XCC, 19f /* CTI */ |
| srlx %o3, 48, %g5 /* IEU0 Group */ |
| andcc %g5, 0xff, %g0 /* IEU1 Group */ |
| be,pn %icc, 20f /* CTI */ |
| |
| stb %g5, [%o0] /* Store */ |
| add %o0, 1, %o0 /* IEU0 Group */ |
| subcc %o2, 1, %o2 /* IEU1 */ |
| be,pn %XCC, 19f /* CTI */ |
| |
| srlx %o3, 40, %g5 /* IEU0 Group */ |
| andcc %g5, 0xff, %g0 /* IEU1 Group */ |
| be,pn %icc, 20f /* CTI */ |
| stb %g5, [%o0] /* Store */ |
| |
| add %o0, 1, %o0 /* IEU0 Group */ |
| subcc %o2, 1, %o2 /* IEU1 */ |
| be,pn %XCC, 19f /* CTI */ |
| srlx %o3, 32, %g5 /* IEU0 Group */ |
| |
| andcc %g5, 0xff, %g0 /* IEU1 Group */ |
| be,pn %icc, 20f /* CTI */ |
| stb %g5, [%o0] /* Store */ |
| add %o0, 1, %o0 /* IEU0 Group */ |
| |
| subcc %o2, 1, %o2 /* IEU1 */ |
| be,pn %XCC, 19f /* CTI */ |
| srlx %o3, 24, %g5 /* IEU0 Group */ |
| andcc %g5, 0xff, %g0 /* IEU1 Group */ |
| |
| be,pn %icc, 20f /* CTI */ |
| stb %g5, [%o0] /* Store */ |
| add %o0, 1, %o0 /* IEU0 Group */ |
| subcc %o2, 1, %o2 /* IEU1 */ |
| |
| be,pn %XCC, 19f /* CTI */ |
| srlx %o3, 16, %g5 /* IEU0 Group */ |
| andcc %g5, 0xff, %g0 /* IEU1 Group */ |
| be,pn %icc, 20f /* CTI */ |
| |
| stb %g5, [%o0] /* Store */ |
| add %o0, 1, %o0 /* IEU0 Group */ |
| subcc %o2, 1, %o2 /* IEU1 */ |
| be,pn %XCC, 19f /* CTI */ |
| |
| srlx %o3, 8, %o3 /* IEU0 Group */ |
| stb %o3, [%o0] /* Store */ |
| 59: add %o0, 1, %o2 /* IEU1 */ |
| andcc %o3, 0xff, %g0 /* IEU1 Group */ |
| |
| retl /* CTI+IEU1 Group */ |
| movne %icc, %o2, %o0 /* Single Group */ |
| 19: retl /* CTI+IEU1 Group */ |
| nop /* IEU0 */ |
| |
| 20: mov %o0, %g6 /* IEU0 Group */ |
| subcc %o2, 1, %o2 /* IEU1 */ |
| be,pn %XCC, 51f /* CTI */ |
| add %o0, 1, %o0 /* IEU0 Group */ |
| |
| 50: stb %g0, [%o0] /* Store Group */ |
| subcc %o2, 1, %o2 /* IEU1 Group */ |
| bne,pt %XCC, 50b /* CTI */ |
| add %o0, 1, %o0 /* IEU0 */ |
| |
| 51: retl /* CTI+IEU1 Group */ |
| mov %g6, %o0 /* IEU0 */ |
| |
| .align 16 |
| 21: andcc %o2, 4, %g0 /* IEU1 Group */ |
| be,pn %icc, 22f /* CTI */ |
| srlx %o3, 32, %g5 /* IEU0 */ |
| stw %g5, [%o0] /* Store Group */ |
| |
| add %o0, 4, %o0 /* IEU0 */ |
| mov %o3, %g5 /* IEU1 */ |
| 22: andcc %o2, 2, %g0 /* IEU1 Group */ |
| be,pn %icc, 23f /* CTI */ |
| |
| srlx %g5, 16, %g4 /* IEU0 */ |
| sth %g4, [%o0] /* Store Group */ |
| add %o0, 2, %o0 /* IEU0 */ |
| mov %g5, %g4 /* IEU1 */ |
| |
| 23: srlx %g4, 8, %g4 /* IEU0 Group */ |
| andcc %o2, 1, %g0 /* IEU1 */ |
| bne,a,pn %icc, 24f /* CTI */ |
| stb %g4, [%o0] /* Store Group */ |
| |
| retl /* CTI+IEU1 Group */ |
| nop /* IEU0 */ |
| 24: retl /* CTI+IEU1 Group */ |
| add %o0, 1, %o0 /* IEU0 */ |
| |
| .align 16 |
| 55: sub %o0, 1, %g6 /* IEU0 Group */ |
| 25: andcc %o0, 7, %g0 /* IEU1 */ |
| be,a,pn %icc, 4b /* CTI */ |
| andncc %o2, 31, %g3 /* IEU1 Group */ |
| |
| stb %g0, [%o0] /* Store Group */ |
| subcc %o2, 1, %o2 /* IEU1 */ |
| bne,pt %XCC, 25b /* CTI */ |
| add %o0, 1, %o0 /* IEU0 Group */ |
| |
| retl /* CTI+IEU1 Group */ |
| mov %g6, %o0 /* IEU0 */ |
| |
| .align 16 |
| 26: ldub [%o1], %o3 /* Load */ |
| sllx %g1, 7, %g2 /* IEU0 Group */ |
| stb %o3, [%o0] /* Store */ |
| 27: subcc %o2, 1, %o2 /* IEU1 */ |
| |
| be,pn %XCC, 59b /* CTI */ |
| add %o1, 1, %o1 /* IEU0 Group */ |
| add %o0, 1, %o0 /* IEU1 */ |
| andcc %o3, 0xff, %g0 /* IEU1 Group */ |
| |
| be,pn %icc, 55b /* CTI */ |
| lduba [%o1] ASI_PNF, %o3 /* Load */ |
| andcc %o0, 7, %g0 /* IEU1 Group */ |
| bne,a,pt %icc, 27b /* CTI */ |
| |
| stb %o3, [%o0] /* Store */ |
| andcc %o1, 7, %g3 /* IEU1 Group */ |
| be,a,pt %icc, 1b /* CTI */ |
| ldx [%o1], %o3 /* Load */ |
| |
| 28: orcc %g0, 64, %g4 /* IEU1 Group */ |
| sllx %g3, 3, %g5 /* IEU0 */ |
| sub %g4, %g5, %g4 /* IEU0 Group */ |
| sub %o1, %g3, %o1 /* IEU1 */ |
| /* %g1 = 0101010101010101 |
| %g2 = 8080808080808080 |
| %g3 = source alignment |
| %g5 = number of bits to shift left |
| %g4 = number of bits to shift right */ |
| |
| ldxa [%o1] ASI_PNF, %o5 /* Load Group */ |
| addcc %o1, 8, %o1 /* IEU1 */ |
| 29: sllx %o5, %g5, %o3 /* IEU0 Group */ |
| ldxa [%o1] ASI_PNF, %o5 /* Load */ |
| |
| subcc %o2, 8, %o2 /* IEU1 */ |
| bl,pn %XCC, 17b /* CTI */ |
| srlx %o5, %g4, %o4 /* IEU0 Group */ |
| add %o1, 8, %o1 /* IEU1 */ |
| |
| or %o3, %o4, %o3 /* IEU0 Group */ |
| add %o0, 8, %o0 /* IEU1 */ |
| sub %o3, %g1, %o4 /* IEU0 Group */ |
| #ifdef EIGHTBIT_NOT_RARE |
| andn %o4, %o3, %o4 /* IEU0 Group */ |
| #endif |
| andcc %o4, %g2, %g0 /* IEU1 Group */ |
| |
| be,a,pt %xcc, 29b /* CTI */ |
| stx %o3, [%o0-8] /* Store */ |
| srlx %o3, 56, %o4 /* IEU0 Group */ |
| andcc %o4, 0xff, %g0 /* IEU1 Group */ |
| |
| be,pn %icc, 36f /* CTI */ |
| srlx %o3, 48, %g6 /* IEU0 */ |
| andcc %g6, 0xff, %g0 /* IEU1 Group */ |
| be,pn %icc, 35f /* CTI */ |
| |
| srlx %o3, 40, %o4 /* IEU0 */ |
| andcc %o4, 0xff, %g0 /* IEU1 Group */ |
| be,pn %icc, 34f /* CTI */ |
| srlx %o3, 32, %g6 /* IEU0 */ |
| |
| andcc %g6, 0xff, %g0 /* IEU1 Group */ |
| be,pn %icc, 33f /* CTI */ |
| srlx %o3, 24, %o4 /* IEU0 */ |
| andcc %o4, 0xff, %g0 /* IEU1 Group */ |
| |
| be,pn %icc, 32f /* CTI */ |
| srlx %o3, 16, %g6 /* IEU0 */ |
| andcc %g6, 0xff, %g0 /* IEU1 Group */ |
| be,pn %icc, 31f /* CTI */ |
| |
| srlx %o3, 8, %o4 /* IEU0 */ |
| andcc %o4, 0xff, %g0 /* IEU1 Group */ |
| be,pn %icc, 30f /* CTI */ |
| andcc %o3, 0xff, %g0 /* IEU1 Group */ |
| |
| bne,pn %icc, 29b /* CTI */ |
| stx %o3, [%o0-8] /* Store */ |
| sub %o0, 1, %g6 /* IEU0 Group */ |
| ba,pt %xcc, 4b /* CTI */ |
| |
| andncc %o2, 31, %g3 /* IEU1 */ |
| 30: subcc %o0, 2, %g6 /* IEU0 */ |
| ba,pt %xcc, 3b /* CTI */ |
| sllx %o4, 8, %g3 /* IEU0 Group */ |
| |
| 31: sllx %g6, 16, %g3 /* IEU0 Group */ |
| ba,pt %xcc, 3b /* CTI */ |
| sub %o0, 3, %g6 /* IEU1 */ |
| 32: subcc %o0, 4, %g6 /* IEU1 Group */ |
| |
| ba,pt %xcc, 3b /* CTI */ |
| sllx %o4, 24, %g3 /* IEU0 */ |
| 33: sllx %g6, 32, %g3 /* IEU0 Group */ |
| ba,pt %xcc, 3b /* CTI */ |
| |
| sub %o0, 5, %g6 /* IEU1 */ |
| 34: subcc %o0, 6, %g6 /* IEU1 Group */ |
| ba,pt %xcc, 3b /* CTI */ |
| sllx %o4, 40, %g3 /* IEU0 */ |
| |
| 35: sllx %g6, 48, %g3 /* IEU0 Group */ |
| ba,pt %xcc, 3b /* CTI */ |
| sub %o0, 7, %g6 /* IEU1 */ |
| 36: subcc %o0, 8, %g6 /* IEU1 Group */ |
| |
| ba,pt %xcc, 3b /* CTI */ |
| sllx %o4, 56, %g3 /* IEU0 */ |
| END(__stpncpy) |
| |
| libc_hidden_def (__stpncpy) |
| weak_alias (__stpncpy, stpncpy) |
