| /* Compare two memory blocks for differences in the first COUNT bytes. |
| For SPARC v9. |
| Copyright (C) 1998, 1999, 2004 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, 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 |
| #endif |
| |
| .text |
| .align 32 |
| ENTRY(memcmp) |
| #ifdef USE_BPR |
| brz,pn %o2, 3f /* CTI+IEU1 Group */ |
| #else |
| tst %o2 /* IEU1 Group */ |
| be,pn %XCC, 3f /* CTI */ |
| #endif |
| andcc %o0, 7, %g0 /* IEU1 Group */ |
| bne,pn %icc, 8f /* CTI */ |
| 1: andcc %o1, 7, %g1 /* IEU1 Group */ |
| |
| bne,pn %icc, 10f /* CTI */ |
| mov 64, %g3 /* IEU0 */ |
| ldx [%o0], %g1 /* Load Group */ |
| sub %o1, %o0, %o1 /* IEU0 */ |
| |
| ldx [%o0 + %o1], %g2 /* Load Group */ |
| add %o0, 8, %o0 /* IEU0 */ |
| 2: mov %g1, %o3 /* IEU0 Group */ |
| subcc %o2, 8, %o2 /* IEU1 */ |
| |
| bl,pn %XCC, 5f /* CTI */ |
| ldxa [%o0] ASI_PNF, %g1 /* Load Group */ |
| mov %g2, %o4 /* IEU0 */ |
| ldxa [%o0 + %o1] ASI_PNF, %g2 /* Load Group */ |
| |
| cmp %o3, %o4 /* IEU1 */ |
| be,pt %xcc, 2b /* CTI */ |
| add %o0, 8, %o0 /* IEU0 */ |
| 7: mov -1, %o0 /* IEU1 */ |
| |
| retl /* CTI+IEU1 Group */ |
| movgu %xcc, 1, %o0 /* Single Group */ |
| 3: retl /* CTI+IEU1 Group */ |
| clr %o0 /* IEU0 */ |
| |
| .align 16 |
| 5: mov %g2, %o4 /* IEU0 */ |
| 6: cmp %o2, -8 /* IEU1 */ |
| be,pn %XCC, 3b /* CTI */ |
| sub %g0, %o2, %o2 /* IEU0 Group */ |
| |
| sllx %o2, 3, %o2 /* IEU0 Group */ |
| srlx %o3, %o2, %o3 /* IEU0 Group */ |
| srlx %o4, %o2, %o4 /* IEU0 Group */ |
| clr %o0 /* IEU1 */ |
| |
| cmp %o3, %o4 /* IEU1 Group */ |
| movgu %xcc, 1, %o0 /* Single Group */ |
| retl /* CTI+IEU1 Group */ |
| movlu %xcc, -1, %o0 /* Single Group */ |
| |
| 8: ldub [%o0], %o3 /* Load */ |
| add %o0, 1, %o0 /* IEU0 */ |
| ldub [%o1], %o4 /* Load Group */ |
| add %o1, 1, %o1 /* IEU0 */ |
| |
| 9: cmp %o3, %o4 /* IEU1 Group */ |
| bne,pn %xcc, 12f /* CTI */ |
| subcc %o2, 1, %o2 /* IEU1 Group */ |
| be,pn %XCC, 3b /* CTI */ |
| |
| lduba [%o0] ASI_PNF, %o3 /* Load */ |
| andcc %o0, 7, %g0 /* IEU1 Group */ |
| be,pn %icc, 1b /* CTI */ |
| lduba [%o1] ASI_PNF, %o4 /* Load */ |
| |
| add %o0, 1, %o0 /* IEU0 Group */ |
| ba,pt %xcc, 9b /* CTI */ |
| add %o1, 1, %o1 /* IEU1 */ |
| |
| .align 16 |
| 12: mov -1, %o0 /* IEU0 Group */ |
| cmp %o3, %o4 /* IEU1 */ |
| retl /* CTI+IEU1 Group */ |
| movgu %xcc, 1, %o0 /* Single Group */ |
| |
| .align 16 |
| nop /* Stub */ |
| 10: sllx %g1, 3, %g2 /* IEU0 Group */ |
| sub %o1, %g1, %o1 /* IEU1 */ |
| sub %g3, %g2, %g3 /* IEU0 Group */ |
| |
| ldxa [%o0] ASI_PNF, %g5 /* Load */ |
| sub %o1, %o0, %o1 /* IEU1 */ |
| ldxa [%o0 + %o1] ASI_PNF, %g4 /* Load Group */ |
| add %o0, 8, %o0 /* IEU0 */ |
| |
| 11: sllx %g4, %g2, %o4 /* IEU0 Group */ |
| ldxa [%o0 + %o1] ASI_PNF, %g4 /* Load */ |
| srlx %g4, %g3, %o5 /* IEU0 Group */ |
| mov %g5, %o3 /* IEU1 */ |
| |
| ldxa [%o0] ASI_PNF, %g5 /* Load */ |
| subcc %o2, 8, %o2 /* IEU1 Group */ |
| bl,pn %XCC, 6b /* CTI */ |
| or %o4, %o5, %o4 /* IEU0 */ |
| |
| cmp %o3, %o4 /* IEU1 Group */ |
| be,pt %xcc, 11b /* CTI */ |
| add %o0, 8, %o0 /* IEU0 */ |
| mov -1, %o0 /* IEU0 */ |
| |
| retl /* CTI+IEU1 Group */ |
| movgu %xcc, 1, %o0 /* Single Group */ |
| END(memcmp) |
| |
| #undef bcmp |
| weak_alias (memcmp, bcmp) |
| libc_hidden_builtin_def (memcmp) |
