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Diffstat (limited to 'libc/string/sparc/sparc64/strcmp.S')
-rw-r--r--libc/string/sparc/sparc64/strcmp.S278
1 files changed, 0 insertions, 278 deletions
diff --git a/libc/string/sparc/sparc64/strcmp.S b/libc/string/sparc/sparc64/strcmp.S
deleted file mode 100644
index 7b8500714..000000000
--- a/libc/string/sparc/sparc64/strcmp.S
+++ /dev/null
@@ -1,278 +0,0 @@
-/* Compare two strings for differences.
- For SPARC v9.
- Copyright (C) 1997, 1999, 2003 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, see
- <http://www.gnu.org/licenses/>. */
-
-#include <asm/asi.h>
-#ifndef XCC
- .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(strcmp)
- sethi %hi(0x01010101), %g1 /* IEU0 Group */
- andcc %o0, 7, %g0 /* IEU1 */
- bne,pn %icc, 7f /* CTI */
- or %g1, %lo(0x01010101), %g1 /* IEU0 Group */
-
- andcc %o1, 7, %g3 /* IEU1 */
- bne,pn %icc, 9f /* CTI */
- sllx %g1, 32, %g2 /* IEU0 Group */
- ldx [%o0], %o2 /* Load */
-
- or %g1, %g2, %g1 /* IEU0 Group */
-1: ldx [%o1], %o3 /* Load */
- sub %o1, %o0, %o1 /* IEU1 */
- sllx %g1, 7, %g2 /* IEU0 Group */
-
-2: add %o0, 8, %o0 /* IEU1 */
- sub %o2, %g1, %g3 /* IEU0 Group */
- subcc %o2, %o3, %g0 /* IEU1 */
- bne,pn %xcc, 13f /* CTI */
-
-#ifdef EIGHTBIT_NOT_RARE
- andn %g3, %o2, %g4 /* IEU0 Group */
- ldxa [%o0] ASI_PNF, %o2 /* Load */
- andcc %g4, %g2, %g0 /* IEU1 Group */
-#else
- ldxa [%o0] ASI_PNF, %o2 /* Load Group */
- andcc %g3, %g2, %g0 /* IEU1 */
-#endif
- be,a,pt %xcc, 2b /* CTI */
- ldxa [%o1 + %o0] ASI_PNF, %o3 /* Load Group */
-
- addcc %g3, %g1, %o4 /* IEU1 */
- srlx %g3, 32, %g3 /* IEU0 */
- andcc %g3, %g2, %g0 /* IEU1 Group */
- 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 + %o0] ASI_PNF, %o3 /* Load */
-
-4: retl /* CTI+IEU1 Group */
- clr %o0 /* IEU0 */
-
- .align 32
-13: mov 0xff, %g6 /* IEU0 Group */
-#ifdef EIGHTBIT_NOT_RARE
- andcc %g4, %g2, %g0 /* IEU1 */
-#else
- andcc %g3, %g2, %g0 /* IEU1 */
-#endif
- be,pt %xcc, 25f /* CTI */
- addcc %g3, %g1, %o4 /* IEU1 Group */
-
- srlx %g3, 32, %g3 /* IEU0 */
- andcc %g3, %g2, %g0 /* IEU1 Group */
- be,pt %xcc, 23f /* CTI */
- sllx %g6, 56, %o5 /* IEU0 */
-
- andcc %o4, %o5, %g0 /* IEU1 Group */
- be,pn %xcc, 24f /* CTI */
- sllx %g6, 48, %o5 /* IEU0 */
- andcc %o4, %o5, %g0 /* IEU1 Group */
-
- be,pn %xcc, 24f /* CTI */
- sllx %g6, 40, %o5 /* IEU0 */
- andcc %o4, %o5, %g0 /* IEU1 Group */
- be,pn %xcc, 24f /* CTI */
-
- sllx %g6, 32, %o5 /* IEU0 */
- andcc %o4, %o5, %g0 /* IEU1 Group */
- be,pn %xcc, 24f /* CTI */
-23: sllx %g6, 24, %o5 /* IEU0 */
-
- andcc %o4, %o5, %g0 /* IEU1 Group */
- be,pn %icc, 24f /* CTI */
- sllx %g6, 16, %o5 /* IEU0 */
- andcc %o4, %o5, %g0 /* IEU1 Group */
-
- be,pn %icc, 24f /* CTI */
- sllx %g6, 8, %o5 /* IEU0 */
- andcc %o4, %o5, %g0 /* IEU1 Group */
- be,pn %icc, 24f /* CTI */
-
- mov %g6, %o5 /* IEU0 */
-25: cmp %o4, %o3 /* IEU1 Group */
-5: mov -1, %o0 /* IEU0 */
- retl /* CTI+IEU1 Group */
-
- movgu %xcc, 1, %o0 /* Single Group */
-
- .align 16
-24: sub %o5, 1, %g6 /* IEU0 Group */
- clr %o0 /* IEU1 */
- or %o5, %g6, %o5 /* IEU0 Group */
- andn %o4, %o5, %o4 /* IEU0 Group */
-
- andn %o3, %o5, %o3 /* IEU1 */
- cmp %o4, %o3 /* IEU1 Group */
- movgu %xcc, 1, %o0 /* Single Group */
- retl /* CTI+IEU1 Group */
-
- movlu %xcc, -1, %o0 /* Single Group */
-6: retl /* CTI+IEU1 Group */
- mov %o4, %o0 /* IEU0 */
-
- .align 16
-7: ldub [%o0], %o2 /* Load */
- add %o0, 1, %o0 /* IEU1 */
- ldub [%o1], %o3 /* Load Group */
- sllx %g1, 32, %g2 /* IEU0 */
-
-8: add %o1, 1, %o1 /* IEU1 */
- subcc %o2, %o3, %o4 /* IEU1 Group */
- bne,pn %xcc, 6b /* CTI */
- lduba [%o0] ASI_PNF, %o2 /* Load */
-
- brz,pn %o3, 4b /* CTI+IEU1 Group */
- lduba [%o1] ASI_PNF, %o3 /* Load */
- andcc %o0, 7, %g0 /* IEU1 Group */
- bne,a,pn %icc, 8b /* CTI */
-
- add %o0, 1, %o0 /* IEU0 */
- or %g1, %g2, %g1 /* IEU0 Group */
- andcc %o1, 7, %g3 /* IEU1 */
- be,a,pn %icc, 1b /* CTI */
-
- ldxa [%o0] ASI_PNF, %o2 /* Load Group */
-9: sllx %g3, 3, %g5 /* IEU0 */
- mov 64, %o5 /* IEU1 */
- sub %o1, %g3, %o1 /* IEU0 Group */
-
- sub %o5, %g5, %o5 /* IEU1 */
- ldxa [%o1] ASI_PNF, %g6 /* Load Group */
- or %g1, %g2, %g1 /* IEU0 */
- sub %o1, %o0, %o1 /* IEU1 */
-
- sllx %g1, 7, %g2 /* IEU0 Group */
- add %o1, 8, %o1 /* IEU1 */
- /* %g1 = 0101010101010101
- * %g2 = 8080808080800880
- * %g5 = number of bits to shift left
- * %o5 = number of bits to shift right */
-10: sllx %g6, %g5, %o3 /* IEU0 Group */
- ldxa [%o1 + %o0] ASI_PNF, %g6 /* Load */
-
-11: srlx %g6, %o5, %o4 /* IEU0 Group */
- ldxa [%o0] ASI_PNF, %o2 /* Load */
- or %o3, %o4, %o3 /* IEU1 */
- add %o0, 8, %o0 /* IEU0 Group */
-
- subcc %o2, %o3, %g0 /* IEU1 */
-#ifdef EIGHTBIT_NOT_RARE
- sub %o2, %g1, %g3 /* IEU0 Group */
- bne,pn %xcc, 13b /* CTI */
- andn %g3, %o2, %g4 /* IEU0 Group */
-
- andcc %g4, %g2, %g0 /* IEU1 Group */
- be,pt %xcc, 10b /* CTI */
- srlx %g4, 32, %g4 /* IEU0 */
- andcc %g4, %g2, %g0 /* IEU1 Group */
-#else
- bne,pn %xcc, 13b /* CTI */
- sub %o2, %g1, %g3 /* IEU0 Group */
- andcc %g3, %g2, %g0 /* IEU1 Group */
-
- be,pt %xcc, 10b /* CTI */
- srlx %g3, 32, %g3 /* IEU0 */
- andcc %g3, %g2, %g0 /* IEU1 Group */
-#endif
- be,pt %xcc, 12f /* CTI */
-
- srlx %o2, 56, %g3 /* IEU0 */
- andcc %g3, 0xff, %g0 /* IEU1 Group */
- be,pn %icc, 4b /* CTI */
- srlx %o2, 48, %g3 /* IEU0 */
-
- andcc %g3, 0xff, %g0 /* IEU1 Group */
- be,pn %icc, 4b /* CTI */
- srlx %o2, 40, %g3 /* IEU0 */
- andcc %g3, 0xff, %g0 /* IEU1 Group */
-
- be,pn %icc, 4b /* CTI */
- srlx %o2, 32, %g3 /* IEU0 */
- andcc %g3, 0xff, %g0 /* IEU1 Group */
- be,pn %icc, 4b /* CTI */
-
-12: srlx %o2, 24, %g3 /* IEU0 */
- andcc %g3, 0xff, %g0 /* IEU1 Group */
- be,pn %icc, 4b /* CTI */
- srlx %o2, 16, %g3 /* IEU0 */
-
- andcc %g3, 0xff, %g0 /* IEU1 Group */
- be,pn %icc, 4b /* CTI */
- srlx %o2, 8, %g3 /* IEU0 */
- andcc %g3, 0xff, %g0 /* IEU1 Group */
-
- be,pn %icc, 4b /* CTI */
- andcc %o2, 0xff, %g0 /* IEU1 Group */
- be,pn %icc, 4b /* CTI */
- sllx %g6, %g5, %o3 /* IEU0 */
-
- ba,pt %xcc, 11b /* CTI Group */
- ldxa [%o1 + %o0] ASI_PNF, %g6 /* Load */
-END(strcmp)
-libc_hidden_def(strcmp)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-19 08:04:09 +0000