diff options
Diffstat (limited to 'sysdeps/sparc/sparc64/strncpy.S')
| -rw-r--r-- | sysdeps/sparc/sparc64/strncpy.S | 393 |
1 files changed, 393 insertions, 0 deletions
diff --git a/sysdeps/sparc/sparc64/strncpy.S b/sysdeps/sparc/sparc64/strncpy.S new file mode 100644 index 0000000000..3d850a8db2 --- /dev/null +++ b/sysdeps/sparc/sparc64/strncpy.S @@ -0,0 +1,393 @@ +/* strncpy(DST, SRC, COUNT) - Copy no more than COUNT bytes of the + null-terminated string from SRC to DST. If SRC does not cover all of + COUNT, the balance is zeroed. + 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 + + /* 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(strncpy) + 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 + mov %o0, %g7 /* IEU0 Group */ + 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 */ + + 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 %g7, %o0 /* IEU0 */ + + .align 16 +10: ba,pt %xcc, 3b /* CTI */ + sllx %g5, 8, %g3 /* IEU0 */ +11: ba,pt %xcc, 3b /* CTI Group */ + sllx %g4, 16, %g3 /* IEU0 */ + +12: ba,pt %xcc, 3b /* CTI Group */ + sllx %g5, 24, %g3 /* IEU0 */ +13: ba,pt %xcc, 3b /* CTI Group */ + sllx %g4, 32, %g3 /* IEU0 */ + +14: ba,pt %xcc, 3b /* CTI Group */ + sllx %g5, 40, %g3 /* IEU0 */ +15: ba,pt %xcc, 3b /* CTI Group */ + sllx %g4, 48, %g3 /* IEU0 */ + +16: ba,pt %xcc, 3b /* CTI */ + sllx %g5, 56, %g3 /* IEU0 */ +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, %g5 /* IEU0 Group */ + stb %g5, [%o0] /* Store */ + +19: retl /* CTI+IEU1 Group */ + mov %g7, %o0 /* IEU0 */ +50: stb %g0, [%o0] /* Store Group */ +20: subcc %o2, 1, %o2 /* IEU1 Group */ + + bne,pt %XCC, 50b /* CTI */ + add %o0, 1, %o0 /* IEU0 */ + retl /* CTI+IEU1 Group */ + mov %g7, %o0 /* IEU0 */ + +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 */ + +24: retl /* CTI+IEU1 Group */ + mov %g7, %o0 /* IEU0 */ +25: andcc %o0, 7, %g0 /* IEU1 Group */ + 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 %g7, %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, 9b /* CTI */ + add %o1, 1, %o1 /* IEU0 Group */ + add %o0, 1, %o0 /* IEU1 */ + andcc %o3, 0xff, %g0 /* IEU1 Group */ + + be,pn %icc, 25b /* 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, %o4 /* IEU0 */ + + andcc %o4, 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, %o4 /* IEU0 */ + andcc %o4, 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, %o4 /* IEU0 */ + + andcc %o4, 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 */ + + ba,pt %xcc, 4b /* CTI Group */ + andncc %o2, 31, %g3 /* IEU1 */ +30: srlx %o3, 8, %o4 /* IEU0 */ + ba,pt %xcc, 3b /* CTI */ + + sllx %o4, 8, %g3 /* IEU0 Group */ +31: srlx %o3, 16, %o4 /* IEU0 Group */ + ba,pt %xcc, 3b /* CTI */ + sllx %o4, 16, %g3 /* IEU0 Group */ + +32: srlx %o3, 24, %o4 /* IEU0 Group */ + ba,pt %xcc, 3b /* CTI */ + sllx %o4, 24, %g3 /* IEU0 Group */ +33: srlx %o3, 32, %o4 /* IEU0 Group */ + + ba,pt %xcc, 3b /* CTI */ + sllx %o4, 32, %g3 /* IEU0 Group */ +34: srlx %o3, 40, %o4 /* IEU0 Group */ + ba,pt %xcc, 3b /* CTI */ + + sllx %o4, 40, %g3 /* IEU0 Group */ +35: srlx %o3, 48, %o4 /* IEU0 Group */ + ba,pt %xcc, 3b /* CTI */ + sllx %o4, 48, %g3 /* IEU0 Group */ + +36: srlx %o3, 56, %o4 /* IEU0 Group */ + ba,pt %xcc, 3b /* CTI */ + sllx %o4, 56, %g3 /* IEU0 Group */ +END(strncpy) |