diff options
Diffstat (limited to 'sysdeps/sparc/sparc64/strncmp.S')
| -rw-r--r-- | sysdeps/sparc/sparc64/strncmp.S | 359 |
1 files changed, 359 insertions, 0 deletions
diff --git a/sysdeps/sparc/sparc64/strncmp.S b/sysdeps/sparc/sparc64/strncmp.S new file mode 100644 index 0000000000..361748dd26 --- /dev/null +++ b/sysdeps/sparc/sparc64/strncmp.S @@ -0,0 +1,359 @@ +/* Compare no more than N characters of S1 and S2, returning less than, + equal to or greater than zero if S1 is lexicographically less than, + equal to or greater than S2. + For SPARC v9. + Copyright (C) 1997, 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 + + /* 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(strncmp) +#ifdef USE_BPR + brz,pn %o2, 4f /* CTI+IEU1 Group */ +#else + tst %o2 /* IEU1 Group */ + be,pn %XCC, 4f /* CTI */ +#endif + sethi %hi(0x1010101), %g1 /* IEU0 */ + andcc %o0, 7, %g0 /* IEU1 Group */ + bne,pn %icc, 9f /* CTI */ + + or %g1, %lo(0x1010101), %g1 /* IEU0 */ + andcc %o1, 7, %g3 /* IEU1 Group */ + bne,pn %icc, 11f /* CTI */ + sllx %g1, 32, %g2 /* IEU0 */ + + ldx [%o0], %g4 /* Load Group */ + or %g1, %g2, %g1 /* IEU0 */ +1: ldx [%o1], %o3 /* Load Group */ + sllx %g1, 7, %g2 /* IEU0 */ + + add %o0, 8, %o0 /* IEU1 */ +2: subcc %o2, 8, %o2 /* IEU1 Group */ + bl,pn %XCC, 5f /* CTI */ + add %o1, 8, %o1 /* IEU0 */ + + sub %g4, %g1, %g3 /* IEU0 Group */ + subcc %g4, %o3, %o4 /* IEU1 */ +#ifdef EIGHTBIT_NOT_RARE + andn %g3, %g4, %g7 /* IEU0 Group */ +#endif + bne,pn %xcc, 6f /* CTI */ + ldxa [%o0] ASI_PNF, %g4 /* Load Group */ + + add %o0, 8, %o0 /* IEU0 */ +#ifdef EIGHTBIT_NOT_RARE + andcc %g7, %g2, %g0 /* IEU1 */ +#else + andcc %g3, %g2, %g0 /* IEU1 */ +#endif + be,a,pt %xcc, 2b /* CTI */ + ldxa [%o1] ASI_PNF, %o3 /* Load Group */ + + addcc %g3, %g1, %o4 /* IEU1 */ +#ifdef EIGHTBIT_NOT_RARE + srlx %g7, 32, %g7 /* IEU0 */ + andcc %g7, %g2, %g0 /* IEU1 Group */ +#else + srlx %g3, 32, %g3 /* IEU0 */ + andcc %g3, %g2, %g0 /* IEU1 Group */ +#endif + be,pt %xcc, 3f /* CTI */ + + srlx %o4, 56, %o5 /* IEU0 */ + andcc %o5, 0xff, %g0 /* IEU1 Group */ + be,pn %icc, 4f /* CTI */ + srlx %o4, 48, %o5 /* IEU0 */ + + andcc %o5, 0xff, %g0 /* IEU1 Group */ + be,pn %icc, 4f /* CTI */ + srlx %o4, 40, %o5 /* IEU0 */ + andcc %o5, 0xff, %g0 /* IEU1 Group */ + + be,pn %icc, 4f /* CTI */ + srlx %o4, 32, %o5 /* IEU0 */ + andcc %o5, 0xff, %g0 /* IEU1 Group */ + be,pn %icc, 4f /* CTI */ + +3: srlx %o4, 24, %o5 /* IEU0 */ + andcc %o5, 0xff, %g0 /* IEU1 Group */ + be,pn %icc, 4f /* CTI */ + srlx %o4, 16, %o5 /* IEU0 */ + + andcc %o5, 0xff, %g0 /* IEU1 Group */ + be,pn %icc, 4f /* CTI */ + srlx %o4, 8, %o5 /* IEU0 */ + andcc %o5, 0xff, %g0 /* IEU1 Group */ + + be,pn %icc, 4f /* CTI */ + andcc %o4, 0xff, %g0 /* IEU1 Group */ + bne,a,pn %icc, 2b /* CTI */ + ldxa [%o1] ASI_PNF, %o3 /* Load */ + +4: retl /* CTI+IEU1 Group */ + clr %o0 /* IEU0 */ + + .align 16 +5: srlx %g4, 56, %o4 /* IEU0 Group */ + cmp %o2, -8 /* IEU1 */ + be,pn %XCC, 4b /* CTI */ + srlx %o3, 56, %o5 /* IEU0 Group */ + + andcc %o4, 0xff, %g0 /* IEU1 */ + be,pn %xcc, 8f /* CTI */ + subcc %o4, %o5, %o4 /* IEU1 Group */ + bne,pn %xcc, 8f /* CTI */ + + srlx %o3, 48, %o5 /* IEU0 */ + cmp %o2, -7 /* IEU1 Group */ + be,pn %XCC, 4b /* CTI */ + srlx %g4, 48, %o4 /* IEU0 */ + + andcc %o4, 0xff, %g0 /* IEU1 Group */ + be,pn %xcc, 8f /* CTI */ + subcc %o4, %o5, %o4 /* IEU1 Group */ + bne,pn %xcc, 8f /* CTI */ + + srlx %o3, 40, %o5 /* IEU0 */ + cmp %o2, -6 /* IEU1 Group */ + be,pn %XCC, 4b /* CTI */ + srlx %g4, 40, %o4 /* IEU0 */ + + andcc %o4, 0xff, %g0 /* IEU1 Group */ + be,pn %xcc, 8f /* CTI */ + subcc %o4, %o5, %o4 /* IEU1 Group */ + bne,pn %xcc, 8f /* CTI */ + + srlx %o3, 32, %o5 /* IEU0 */ + cmp %o2, -5 /* IEU1 Group */ + be,pn %XCC, 4b /* CTI */ + srlx %g4, 32, %o4 /* IEU0 */ + + andcc %o4, 0xff, %g0 /* IEU1 Group */ + be,pn %xcc, 8f /* CTI */ + subcc %o4, %o5, %o4 /* IEU1 Group */ + bne,pn %xcc, 8f /* CTI */ + + srlx %o3, 24, %o5 /* IEU0 */ + cmp %o2, -4 /* IEU1 Group */ + be,pn %XCC, 4b /* CTI */ + srlx %g4, 24, %o4 /* IEU0 */ + + andcc %o4, 0xff, %g0 /* IEU1 Group */ + be,pn %xcc, 8f /* CTI */ + subcc %o4, %o5, %o4 /* IEU1 Group */ + bne,pn %xcc, 8f /* CTI */ + + srlx %o3, 16, %o5 /* IEU0 */ + cmp %o2, -3 /* IEU1 Group */ + be,pn %XCC, 4b /* CTI */ + srlx %g4, 16, %o4 /* IEU0 */ + + andcc %o4, 0xff, %g0 /* IEU1 Group */ + be,pn %xcc, 8f /* CTI */ + subcc %o4, %o5, %o4 /* IEU1 Group */ + bne,pn %xcc, 8f /* CTI */ + + srlx %o3, 8, %o5 /* IEU0 */ + cmp %o2, -2 /* IEU1 Group */ + be,pn %XCC, 4b /* CTI */ + srlx %g4, 8, %o4 /* IEU0 */ + + retl /* CTI+IEU1 Group */ + sub %o4, %o5, %o0 /* IEU0 */ +6: addcc %o3, %o4, %g4 /* IEU1 */ +7: srlx %o3, 56, %o5 /* IEU0 */ + + srlx %g4, 56, %o4 /* IEU0 Group */ + andcc %o4, 0xff, %g0 /* IEU1 Group */ + be,pn %xcc, 8f /* CTI */ + subcc %o4, %o5, %o4 /* IEU1 Group */ + + bne,pn %xcc, 8f /* CTI */ + srlx %o3, 48, %o5 /* IEU0 */ + srlx %g4, 48, %o4 /* IEU0 Group */ + andcc %o4, 0xff, %g0 /* IEU1 Group */ + + be,pn %xcc, 8f /* CTI */ + subcc %o4, %o5, %o4 /* IEU1 Group */ + bne,pn %xcc, 8f /* CTI */ + srlx %o3, 40, %o5 /* IEU0 */ + + srlx %g4, 40, %o4 /* IEU0 Group */ + andcc %o4, 0xff, %g0 /* IEU1 Group */ + be,pn %xcc, 8f /* CTI */ + subcc %o4, %o5, %o4 /* IEU1 Group */ + + bne,pn %xcc, 8f /* CTI */ + srlx %o3, 32, %o5 /* IEU0 */ + srlx %g4, 32, %o4 /* IEU0 Group */ + andcc %o4, 0xff, %g0 /* IEU1 Group */ + + be,pn %xcc, 8f /* CTI */ + subcc %o4, %o5, %o4 /* IEU1 Group */ + bne,pn %xcc, 8f /* CTI */ + srlx %o3, 24, %o5 /* IEU0 */ + + srlx %g4, 24, %o4 /* IEU0 Group */ + andcc %o4, 0xff, %g0 /* IEU1 Group */ + be,pn %xcc, 8f /* CTI */ + subcc %o4, %o5, %o4 /* IEU1 Group */ + + bne,pn %xcc, 8f /* CTI */ + srlx %o3, 16, %o5 /* IEU0 */ + srlx %g4, 16, %o4 /* IEU0 Group */ + andcc %o4, 0xff, %g0 /* IEU1 Group */ + + be,pn %xcc, 8f /* CTI */ + subcc %o4, %o5, %o4 /* IEU1 Group */ + bne,pn %xcc, 8f /* CTI */ + srlx %o3, 8, %o5 /* IEU0 */ + + srlx %g4, 8, %o4 /* IEU0 Group */ + andcc %o4, 0xff, %g0 /* IEU1 Group */ + be,pn %xcc, 8f /* CTI */ + subcc %o4, %o5, %o4 /* IEU1 Group */ + + retl /* CTI+IEU1 Group */ + sub %g4, %o3, %o0 /* IEU0 */ +8: retl /* CTI+IEU1 Group */ + mov %o4, %o0 /* IEU0 */ + +9: ldub [%o0], %g4 /* Load Group */ + add %o0, 1, %o0 /* IEU0 */ + ldub [%o1], %o3 /* Load Group */ + sllx %g1, 32, %g2 /* IEU0 */ + +10: subcc %o2, 1, %o2 /* IEU1 Group */ + be,pn %XCC, 8b /* CTI */ + sub %g4, %o3, %o4 /* IEU0 */ + add %o1, 1, %o1 /* IEU0 Group */ + + cmp %g4, %o3 /* IEU1 */ + bne,pn %xcc, 8b /* CTI */ + lduba [%o0] ASI_PNF, %g4 /* Load Group */ + andcc %o3, 0xff, %g0 /* IEU1 */ + + be,pn %icc, 4b /* CTI */ + lduba [%o1] ASI_PNF, %o3 /* Load Group */ + andcc %o0, 7, %g0 /* IEU1 */ + bne,a,pn %icc, 10b /* CTI */ + + add %o0, 1, %o0 /* IEU0 Group */ + or %g1, %g2, %g1 /* IEU1 */ + andcc %o1, 7, %g3 /* IEU1 Group */ + be,pn %icc, 1b /* CTI */ + + ldxa [%o0] ASI_PNF, %g4 /* Load */ +11: sllx %g3, 3, %g5 /* IEU0 Group */ + mov 64, %g7 /* IEU1 */ + sub %o1, %g3, %o1 /* IEU0 Group */ + + sub %g7, %g5, %g7 /* IEU1 */ + ldxa [%o1] ASI_PNF, %o4 /* Load */ + sllx %g1, 7, %g2 /* IEU0 Group */ + add %o1, 8, %o1 /* IEU1 */ + /* %g1 = 0101010101010101 + %g2 = 8080808080800880 + %g3 = %o1 alignment + %g5 = number of bits to shift left + %g7 = number of bits to shift right */ + +12: sllx %o4, %g5, %o3 /* IEU0 Group */ + ldxa [%o1] ASI_PNF, %o4 /* Load */ + add %o1, 8, %o1 /* IEU1 */ +13: ldxa [%o0] ASI_PNF, %g4 /* Load Group */ + + addcc %o0, 8, %o0 /* IEU1 */ + srlx %o4, %g7, %o5 /* IEU0 */ + subcc %o2, 8, %o2 /* IEU1 Group */ + bl,pn %XCC, 5b /* CTI */ + + or %o3, %o5, %o3 /* IEU0 */ + cmp %g4, %o3 /* IEU1 Group */ + bne,pn %xcc, 7b /* CTI */ + sub %g4, %g1, %o5 /* IEU0 */ + +#ifdef EIGHTBIT_NOT_RARE + andn %o5, %g4, %o5 /* IEU0 Group */ +#endif + andcc %o5, %g2, %g0 /* IEU1 Group */ + be,pt %xcc, 12b /* CTI */ + srlx %o5, 32, %o5 /* IEU0 */ + andcc %o5, %g2, %g0 /* IEU1 Group */ + + be,pt %xcc, 14f /* CTI */ + srlx %g4, 56, %o5 /* IEU0 */ + andcc %o5, 0xff, %g0 /* IEU1 Group */ + be,pn %icc, 4b /* CTI */ + + srlx %g4, 48, %o5 /* IEU0 */ + andcc %o5, 0xff, %g0 /* IEU1 Group */ + be,pn %icc, 4b /* CTI */ + srlx %g4, 40, %o5 /* IEU0 */ + + andcc %o5, 0xff, %g0 /* IEU1 Group */ + be,pn %icc, 4b /* CTI */ + srlx %g4, 32, %o5 /* IEU0 */ + andcc %o5, 0xff, %g0 /* IEU1 Group */ + + be,pn %icc, 4b /* CTI */ +14: srlx %g4, 24, %o5 /* IEU0 */ + andcc %o5, 0xff, %g0 /* IEU1 Group */ + be,pn %icc, 4b /* CTI */ + + srlx %g4, 16, %o5 /* IEU0 */ + andcc %o5, 0xff, %g0 /* IEU1 Group */ + be,pn %icc, 4b /* CTI */ + srlx %g4, 8, %o5 /* IEU0 */ + + andcc %o5, 0xff, %g0 /* IEU1 Group */ + be,pn %icc, 4b /* CTI */ + andcc %g4, 0xff, %g0 /* IEU1 Group */ + be,pn %icc, 4b /* CTI */ + + sllx %o4, %g5, %o3 /* IEU0 */ + ldxa [%o1] ASI_PNF, %o4 /* Load Group */ + ba,pt %xcc, 13b /* CTI */ + add %o1, 8, %o1 /* IEU0 */ +END(strncmp) |