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-rw-r--r--sysdeps/sparc/sparc64/strncmp.S359
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)