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30891f35fa
We stopped adding "Contributed by" or similar lines in sources in 2012 in favour of git logs and keeping the Contributors section of the glibc manual up to date. Removing these lines makes the license header a bit more consistent across files and also removes the possibility of error in attribution when license blocks or files are copied across since the contributed-by lines don't actually reflect reality in those cases. Move all "Contributed by" and similar lines (Written by, Test by, etc.) into a new file CONTRIBUTED-BY to retain record of these contributions. These contributors are also mentioned in manual/contrib.texi, so we just maintain this additional record as a courtesy to the earlier developers. The following scripts were used to filter a list of files to edit in place and to clean up the CONTRIBUTED-BY file respectively. These were not added to the glibc sources because they're not expected to be of any use in future given that this is a one time task: https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
481 lines
14 KiB
ArmAsm
481 lines
14 KiB
ArmAsm
/* strchr (str, ch) -- Return pointer to first occurrence of CH in STR.
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For SPARC v9.
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Copyright (C) 1998-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <asm/asi.h>
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#ifndef XCC
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#define XCC xcc
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#define USE_BPR
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.register %g2, #scratch
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.register %g3, #scratch
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.register %g6, #scratch
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#endif
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/* Normally, this uses
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((xword - 0x0101010101010101) & 0x8080808080808080) test
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to find out if any byte in xword could be zero. This is fast, but
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also gives false alarm for any byte in range 0x81-0xff. It does
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not matter for correctness, as if this test tells us there could
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be some zero byte, we check it byte by byte, but if bytes with
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high bits set are common in the strings, then this will give poor
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performance. You can #define EIGHTBIT_NOT_RARE and the algorithm
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will use one tick slower, but more precise test
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((xword - 0x0101010101010101) & (~xword) & 0x8080808080808080),
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which does not give any false alarms (but if some bits are set,
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one cannot assume from it which bytes are zero and which are not).
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It is yet to be measured, what is the correct default for glibc
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in these days for an average user.
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*/
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.text
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.align 32
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ENTRY(strchr)
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andcc %o1, 0xff, %o1 /* IEU1 Group */
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be,pn %icc, 17f /* CTI */
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sllx %o1, 8, %g3 /* IEU0 Group */
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sethi %hi(0x01010101), %g1 /* IEU1 */
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or %g3, %o1, %g3 /* IEU0 Group */
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ldub [%o0], %o3 /* Load */
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sllx %g3, 16, %g5 /* IEU0 Group */
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or %g1, %lo(0x01010101), %g1 /* IEU1 */
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sllx %g1, 32, %g2 /* IEU0 Group */
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brz,pn %o3, 5f /* CTI+IEU1 */
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orcc %g3, %g5, %g3 /* IEU1 Group */
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sllx %g3, 32, %g5 /* IEU0 */
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cmp %o3, %o1 /* IEU1 Group */
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be,pn %xcc, 14f /* CTI */
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or %g1, %g2, %g1 /* IEU0 */
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andcc %o0, 7, %g0 /* IEU1 Group */
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bne,a,pn %icc, 15f /* CTI */
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add %o0, 1, %o0 /* IEU0 */
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ldx [%o0], %o3 /* Load Group */
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1: sllx %g1, 7, %g2 /* IEU0 */
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or %g3, %g5, %g3 /* IEU1 */
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add %o0, 8, %o0 /* IEU0 Group */
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xor %o3, %g3, %o4 /* IEU1 */
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/* %g1 = 0101010101010101 *
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* %g2 = 8080088080808080 *
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* %g3 = c c c c c c c c *
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* %o3 = value *
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* %o4 = value XOR c */
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2: sub %o3, %g1, %o2 /* IEU0 Group */
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sub %o4, %g1, %o5 /* IEU1 */
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#ifdef EIGHTBIT_NOT_RARE
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andn %o2, %o3, %g6 /* IEU0 Group */
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andn %o5, %o4, %o5 /* IEU1 */
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ldxa [%o0] ASI_PNF, %o3 /* Load */
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or %o5, %g6, %o5 /* IEU0 Group */
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#else
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ldxa [%o0] ASI_PNF, %o3 /* Load */
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or %o5, %o2, %o5 /* IEU0 Group */
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#endif
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add %o0, 8, %o0 /* IEU1 */
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andcc %o5, %g2, %g0 /* IEU1 Group */
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be,a,pt %xcc, 2b /* CTI */
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xor %o3, %g3, %o4 /* IEU0 */
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srlx %o5, 32, %g5 /* IEU0 Group */
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add %o2, %g1, %o2 /* IEU1 */
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3: andcc %g5, %g2, %g0 /* IEU1 Group */
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be,pn %xcc, 4f /* CTI */
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srlx %o2, 56, %g5 /* IEU0 */
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andcc %g5, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 5f /* CTI */
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srlx %o4, 56, %g5 /* IEU0 */
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andcc %g5, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 6f /* CTI */
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srlx %o2, 48, %g5 /* IEU0 */
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andcc %g5, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 5f /* CTI */
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srlx %o4, 48, %g5 /* IEU0 */
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andcc %g5, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 7f /* CTI */
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srlx %o2, 40, %g5 /* IEU0 */
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andcc %g5, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 5f /* CTI */
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srlx %o4, 40, %g5 /* IEU0 */
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andcc %g5, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 8f /* CTI */
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srlx %o2, 32, %g5 /* IEU0 */
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andcc %g5, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 5f /* CTI */
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srlx %o4, 32, %g5 /* IEU0 */
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andcc %g5, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 9f /* CTI */
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4: srlx %o2, 24, %g5 /* IEU0 */
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andcc %g5, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 5f /* CTI */
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srlx %o4, 24, %g5 /* IEU0 */
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andcc %g5, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 10f /* CTI */
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srlx %o2, 16, %g5 /* IEU0 */
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andcc %g5, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 5f /* CTI */
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srlx %o4, 16, %g5 /* IEU0 */
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andcc %g5, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 11f /* CTI */
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srlx %o2, 8, %g5 /* IEU0 */
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andcc %g5, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 5f /* CTI */
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srlx %o4, 8, %g5 /* IEU0 */
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andcc %g5, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 12f /* CTI */
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andcc %o2, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 5f /* CTI */
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sub %o3, %g1, %o2 /* IEU0 */
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andcc %o4, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 13f /* CTI */
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xor %o3, %g3, %o4 /* IEU0 */
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ldxa [%o0] ASI_PNF, %o3 /* Load Group */
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sub %o4, %g1, %o5 /* IEU0 */
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or %o5, %o2, %o5 /* IEU1 */
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add %o0, 8, %o0 /* IEU0 Group */
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andcc %o5, %g2, %g0 /* IEU1 */
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be,a,pt %xcc, 2b /* CTI */
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xor %o3, %g3, %o4 /* IEU0 Group */
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srlx %o5, 32, %g5 /* IEU0 Group */
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ba,pt %xcc, 3b /* CTI */
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add %o2, %g1, %o2 /* IEU1 */
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.align 16
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5: retl /* CTI+IEU1 Group */
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clr %o0 /* IEU0 */
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6: retl /* CTI+IEU1 Group */
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add %o0, -16, %o0 /* IEU0 */
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7: retl /* CTI+IEU1 Group */
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add %o0, -15, %o0 /* IEU0 */
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8: retl /* CTI+IEU1 Group */
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add %o0, -14, %o0 /* IEU0 */
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9: retl /* CTI+IEU1 Group */
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add %o0, -13, %o0 /* IEU0 */
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10: retl /* CTI+IEU1 Group */
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add %o0, -12, %o0 /* IEU0 */
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11: retl /* CTI+IEU1 Group */
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add %o0, -11, %o0 /* IEU0 */
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12: retl /* CTI+IEU1 Group */
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add %o0, -10, %o0 /* IEU0 */
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13: retl /* CTI+IEU1 Group */
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add %o0, -9, %o0 /* IEU0 */
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14: retl /* CTI+IEU1 Group */
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nop /* IEU0 */
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.align 16
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15: ldub [%o0], %o3 /* Load Group */
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16: andcc %o0, 7, %g0 /* IEU1 */
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be,a,pn %icc, 1b /* CTI */
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ldx [%o0], %o3 /* Load Group */
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andcc %o3, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 5b /* CTI */
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add %o0, 1, %o0 /* IEU0 */
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cmp %o3, %o1 /* IEU1 Group */
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bne,a,pn %icc, 16b /* CTI */
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ldub [%o0], %o3 /* Load */
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retl /* CTI+IEU1 Group */
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add %o0, -1, %o0 /* IEU0 */
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/* strchr (str, 0) */
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.align 32
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nop
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.align 16
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17: sethi %hi(0x01010101), %g1 /* IEU0 Group */
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ldub [%o0], %o3 /* Load */
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or %g1, %lo(0x01010101), %g1 /* IEU0 Group */
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sllx %g1, 32, %g2 /* IEU0 Group */
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andcc %o0, 7, %g0 /* IEU1 */
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or %g1, %g2, %g1 /* IEU0 Group */
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bne,pn %icc, 32f /* CTI */
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sllx %g1, 7, %g2 /* IEU0 Group */
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brz,pn %o3, 30f /* CTI+IEU1 */
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ldx [%o0], %o3 /* Load */
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18: add %o0, 8, %o0 /* IEU0 Group */
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19: sub %o3, %g1, %o2 /* IEU0 Group */
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#ifdef EIGHTBIT_NOT_RARE
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andn %o2, %o3, %g6 /* IEU0 Group */
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ldxa [%o0] ASI_PNF, %o3 /* Load */
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andcc %g6, %g2, %g0 /* IEU1 Group */
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#else
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ldxa [%o0] ASI_PNF, %o3 /* Load */
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andcc %o2, %g2, %g0 /* IEU1 Group */
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#endif
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be,pt %xcc, 19b /* CTI */
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add %o0, 8, %o0 /* IEU0 */
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addcc %o2, %g1, %g3 /* IEU1 Group */
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srlx %o2, 32, %o2 /* IEU0 */
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20: andcc %o2, %g2, %g0 /* IEU1 Group */
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be,pn %xcc, 21f /* CTI */
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srlx %g3, 56, %o2 /* IEU0 */
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andcc %o2, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 29f /* CTI */
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srlx %g3, 48, %o2 /* IEU0 */
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andcc %o2, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 28f /* CTI */
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srlx %g3, 40, %o2 /* IEU0 */
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andcc %o2, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 27f /* CTI */
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srlx %g3, 32, %o2 /* IEU0 */
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andcc %o2, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 26f /* CTI */
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21: srlx %g3, 24, %o2 /* IEU0 */
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andcc %o2, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 25f /* CTI */
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srlx %g3, 16, %o2 /* IEU0 */
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andcc %o2, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 24f /* CTI */
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srlx %g3, 8, %o2 /* IEU0 */
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andcc %o2, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 23f /* CTI */
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sub %o3, %g1, %o2 /* IEU0 */
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andcc %g3, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 22f /* CTI */
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ldxa [%o0] ASI_PNF, %o3 /* Load */
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andcc %o2, %g2, %g0 /* IEU1 Group */
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be,pt %xcc, 19b /* CTI */
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add %o0, 8, %o0 /* IEU0 */
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addcc %o2, %g1, %g3 /* IEU1 Group */
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ba,pt %xcc, 20b /* CTI */
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srlx %o2, 32, %o2 /* IEU0 */
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.align 16
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22: retl /* CTI+IEU1 Group */
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add %o0, -9, %o0 /* IEU0 */
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23: retl /* CTI+IEU1 Group */
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add %o0, -10, %o0 /* IEU0 */
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24: retl /* CTI+IEU1 Group */
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add %o0, -11, %o0 /* IEU0 */
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25: retl /* CTI+IEU1 Group */
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add %o0, -12, %o0 /* IEU0 */
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26: retl /* CTI+IEU1 Group */
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add %o0, -13, %o0 /* IEU0 */
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27: retl /* CTI+IEU1 Group */
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add %o0, -14, %o0 /* IEU0 */
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28: retl /* CTI+IEU1 Group */
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add %o0, -15, %o0 /* IEU0 */
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29: retl /* CTI+IEU1 Group */
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add %o0, -16, %o0 /* IEU0 */
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30: retl /* CTI+IEU1 Group */
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nop /* IEU0 */
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.align 16
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32: andcc %o0, 7, %g0 /* IEU1 Group */
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be,a,pn %icc, 18b /* CTI */
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ldx [%o0], %o3 /* Load */
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add %o0, 1, %o0 /* IEU0 Group */
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brnz,a,pt %o3, 32b /* CTI+IEU1 */
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lduba [%o0] ASI_PNF, %o3 /* Load */
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retl /* CTI+IEU1 Group */
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add %o0, -1, %o0 /* IEU0 */
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END(strchr)
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.align 32
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ENTRY(strrchr)
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andcc %o1, 0xff, %o1 /* IEU1 Group */
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be,pn %icc, 17b /* CTI */
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clr %g4 /* IEU0 */
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andcc %o0, 7, %g0 /* IEU1 Group */
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bne,pn %icc, 13f /* CTI */
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sllx %o1, 8, %g3 /* IEU0 */
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ldx [%o0], %o3 /* Load Group */
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1: sethi %hi(0x01010101), %g1 /* IEU0 */
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or %g3, %o1, %g3 /* IEU1 */
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sllx %g3, 16, %g5 /* IEU0 Group */
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or %g1, %lo(0x01010101), %g1 /* IEU1 */
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sllx %g1, 32, %g2 /* IEU0 Group */
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or %g3, %g5, %g3 /* IEU1 */
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sllx %g3, 32, %g5 /* IEU0 Group */
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or %g1, %g2, %g1 /* IEU1 */
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sllx %g1, 7, %g2 /* IEU0 Group */
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or %g3, %g5, %g3 /* IEU1 */
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add %o0, 8, %o0 /* IEU0 Group */
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xor %o3, %g3, %o4 /* IEU1 */
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/* %g1 = 0101010101010101 *
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* %g2 = 8080088080808080 *
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* %g3 = c c c c c c c c *
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* %o3 = value *
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* %o4 = value XOR c */
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2: sub %o3, %g1, %o2 /* IEU0 Group */
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3: sub %o4, %g1, %o5 /* IEU1 */
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#ifdef EIGHTBIT_NOT_RARE
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andn %o2, %o3, %g6 /* IEU0 Group */
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andn %o5, %o4, %o5 /* IEU1 */
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ldxa [%o0] ASI_PNF, %o3 /* Load */
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or %o5, %g6, %o5 /* IEU0 Group */
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#else
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ldxa [%o0] ASI_PNF, %o3 /* Load */
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or %o5, %o2, %o5 /* IEU0 Group */
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#endif
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add %o0, 8, %o0 /* IEU1 */
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andcc %o5, %g2, %g0 /* IEU1 Group */
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be,a,pt %xcc, 2b /* CTI */
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xor %o3, %g3, %o4 /* IEU0 */
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srlx %o5, 32, %g5 /* IEU0 Group */
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add %o2, %g1, %o2 /* IEU1 */
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andcc %g5, %g2, %g0 /* IEU1 Group */
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be,pn %xcc, 7f /* CTI */
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srlx %o2, 56, %g5 /* IEU0 */
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andcc %g5, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 12f /* CTI */
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srlx %o4, 56, %g5 /* IEU0 */
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andcc %g5, 0xff, %g0 /* IEU1 Group */
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srlx %o2, 48, %g5 /* IEU0 */
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be,a,pn %icc, 4f /* CTI */
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add %o0, -16, %g4 /* IEU0 Group */
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4: andcc %g5, 0xff, %g0 /* IEU1 Group */
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be,pn %icc, 12f /* CTI */
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srlx %o4, 48, %g5 /* IEU0 */
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andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
srlx %o2, 40, %g5 /* IEU0 */
|
|
be,a,pn %icc, 5f /* CTI */
|
|
add %o0, -15, %g4 /* IEU0 Group */
|
|
|
|
5: andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
be,pn %icc, 12f /* CTI */
|
|
srlx %o4, 40, %g5 /* IEU0 */
|
|
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
|
|
srlx %o2, 32, %g5 /* IEU0 */
|
|
be,a,pn %icc, 6f /* CTI */
|
|
add %o0, -14, %g4 /* IEU0 Group */
|
|
6: andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
|
|
be,pn %icc, 12f /* CTI */
|
|
srlx %o4, 32, %g5 /* IEU0 */
|
|
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
be,a,pn %icc, 7f /* CTI */
|
|
|
|
add %o0, -13, %g4 /* IEU0 */
|
|
7: srlx %o2, 24, %g5 /* IEU0 */
|
|
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
be,pn %icc, 12f /* CTI */
|
|
|
|
srlx %o4, 24, %g5 /* IEU0 */
|
|
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
srlx %o2, 16, %g5 /* IEU0 */
|
|
be,a,pn %icc, 8f /* CTI */
|
|
|
|
add %o0, -12, %g4 /* IEU0 Group */
|
|
8: andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
be,pn %icc, 12f /* CTI */
|
|
srlx %o4, 16, %g5 /* IEU0 */
|
|
|
|
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
srlx %o2, 8, %g5 /* IEU0 */
|
|
be,a,pn %icc, 9f /* CTI */
|
|
add %o0, -11, %g4 /* IEU0 Group */
|
|
|
|
9: andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
be,pn %icc, 12f /* CTI */
|
|
srlx %o4, 8, %g5 /* IEU0 */
|
|
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
|
|
be,a,pn %icc, 10f /* CTI */
|
|
add %o0, -10, %g4 /* IEU0 */
|
|
10: andcc %o2, 0xff, %g0 /* IEU1 Group */
|
|
be,pn %icc, 12f /* CTI */
|
|
|
|
sub %o3, %g1, %o2 /* IEU0 */
|
|
andcc %o4, 0xff, %g0 /* IEU1 Group */
|
|
be,a,pn %icc, 11f /* CTI */
|
|
add %o0, -9, %g4 /* IEU0 */
|
|
|
|
11: ba,pt %xcc, 3b /* CTI Group */
|
|
xor %o3, %g3, %o4 /* IEU0 Group */
|
|
12: retl /* CTI+IEU1 Group */
|
|
mov %g4, %o0 /* IEU0 */
|
|
|
|
.align 16
|
|
13: ldub [%o0], %o3 /* Load Group */
|
|
add %o0, 1, %o0 /* IEU0 */
|
|
14: andcc %o3, 0xff, %g0 /* IEU1 Group */
|
|
be,pn %icc, 12b /* CTI */
|
|
|
|
cmp %o3, %o1 /* IEU1 Group */
|
|
ldub [%o0], %o3 /* Load */
|
|
be,a,pn %icc, 15f /* CTI */
|
|
add %o0, -1, %g4 /* IEU0 Group */
|
|
|
|
15: andcc %o0, 7, %g0 /* IEU1 Group */
|
|
bne,a,pt %icc, 14b /* CTI */
|
|
add %o0, 1, %o0 /* IEU0 */
|
|
ba,pt %xcc, 1b /* CTI Group */
|
|
|
|
ldx [%o0], %o3 /* Load */
|
|
END(strrchr)
|
|
|
|
weak_alias (strchr, index)
|
|
weak_alias (strrchr, rindex)
|
|
libc_hidden_builtin_def (strchr)
|
|
libc_hidden_builtin_def (strrchr)
|