diff options
Diffstat (limited to 'sysdeps/sparc/sparc64/memcmp.S')
| -rw-r--r-- | sysdeps/sparc/sparc64/memcmp.S | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/sysdeps/sparc/sparc64/memcmp.S b/sysdeps/sparc/sparc64/memcmp.S new file mode 100644 index 0000000000..bd3253ce5c --- /dev/null +++ b/sysdeps/sparc/sparc64/memcmp.S @@ -0,0 +1,140 @@ +/* Compare two memory blocks for differences in the first COUNT bytes. + For SPARC v9. + Copyright (C) 1998,1999 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. 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 +#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, %g7 /* Load Group */ + add %o0, 8, %o0 /* IEU0 */ + +11: sllx %g7, %g2, %o4 /* IEU0 Group */ + ldxa [%o0 + %o1] ASI_PNF, %g7 /* Load */ + srlx %g7, %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) |