aboutsummaryrefslogtreecommitdiff
path: root/sysdeps/ia64/strchr.S
diff options
context:
space:
mode:
authorZack Weinberg <zackw@panix.com>2017-06-08 15:39:03 -0400
committerZack Weinberg <zackw@panix.com>2017-06-08 15:39:03 -0400
commit5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch)
tree4470480d904b65cf14ca524f96f79eca818c3eaf /sysdeps/ia64/strchr.S
parent199fc19d3aaaf57944ef036e15904febe877fc93 (diff)
downloadglibc-zack/build-layout-experiment.tar
glibc-zack/build-layout-experiment.tar.gz
glibc-zack/build-layout-experiment.tar.bz2
glibc-zack/build-layout-experiment.zip
Prepare for radical source tree reorganization.zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage directory, REORG.TODO, except for files that will certainly still exist in their current form at top level when we're done (COPYING, COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which are moved to the new directory OldChangeLogs, instead), and the generated file INSTALL (which is just deleted; in the new order, there will be no generated files checked into version control).
Diffstat (limited to 'sysdeps/ia64/strchr.S')
-rw-r--r--sysdeps/ia64/strchr.S111
1 files changed, 0 insertions, 111 deletions
diff --git a/sysdeps/ia64/strchr.S b/sysdeps/ia64/strchr.S
deleted file mode 100644
index e781e47401..0000000000
--- a/sysdeps/ia64/strchr.S
+++ /dev/null
@@ -1,111 +0,0 @@
-/* Optimized version of the standard strchr() function.
- This file is part of the GNU C Library.
- Copyright (C) 2000-2017 Free Software Foundation, Inc.
- Contributed by Dan Pop <Dan.Pop@cern.ch>.
-
- 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/>. */
-
-/* Return: the address of the first occurence of chr in str or NULL
-
- Inputs:
- in0: str
- in1: chr
-
- A modified version of memchr.S, the search ends when the character is
- found or the terminating null character is encountered.
-
- This implementation assumes little endian mode. For big endian mode,
- the instruction czx1.r should be replaced by czx1.l. */
-
-#include <sysdep.h>
-#undef ret
-
-#define saved_lc r18
-#define poschr r19
-#define pos0 r20
-#define val1 r21
-#define val2 r22
-#define tmp r24
-#define chrx8 r25
-#define loopcnt r30
-
-#define str in0
-#define chr in1
-
-ENTRY(strchr)
- .prologue
- alloc r2 = ar.pfs, 2, 0, 0, 0
- .save ar.lc, saved_lc
- mov saved_lc = ar.lc // save the loop counter
- .body
- mov ret0 = str
- and tmp = 7, str // tmp = str % 8
- mux1 chrx8 = chr, @brcst
- extr.u chr = chr, 0, 8 // retain only the last byte
- cmp.ne p8, p0 = r0, r0 // clear p8
- ;;
- sub loopcnt = 8, tmp // loopcnt = 8 - tmp
- cmp.eq p6, p0 = tmp, r0
-(p6) br.cond.sptk .str_aligned;;
- adds loopcnt = -1, loopcnt;;
- mov ar.lc = loopcnt
-.l1:
- ld1 val2 = [ret0], 1
- ;;
- cmp.eq p6, p0 = val2, chr
- cmp.eq p7, p0 = val2, r0
-(p6) br.cond.spnt .restore_and_exit
-(p7) br.cond.spnt .notfound
- br.cloop.sptk .l1
-.str_aligned:
- ld8 val1 = [ret0], 8;;
- nop.b 0
- nop.b 0
-.l2:
- ld8.s val2 = [ret0], 8 // don't bomb out here
- czx1.r pos0 = val1
- xor tmp = val1, chrx8 // if val1 contains chr, tmp will
- ;; // contain a zero in its position
- czx1.r poschr = tmp
- cmp.ne p6, p0 = 8, pos0
- ;;
- cmp.ne p7, p0 = 8, poschr
-(p7) br.cond.spnt .foundit
-(p6) br.cond.spnt .notfound
- chk.s val2, .recovery
-.back:
- mov val1 = val2
- br.cond.dptk .l2
-.foundit:
-(p6) cmp.lt p8, p0 = pos0, poschr // we found chr and null in the word
-(p8) br.cond.spnt .notfound // null was found before chr
- add ret0 = ret0, poschr ;;
- adds ret0 = -15, ret0 ;; // should be -16, but we decrement
-.restore_and_exit: // ret0 in the next instruction
- adds ret0 = -1, ret0 // ret0 was pointing 1 char too far
- mov ar.lc = saved_lc // restore the loop counter
- br.ret.sptk.many b0
-.notfound:
- mov ret0 = r0 // return NULL if null was found
- mov ar.lc = saved_lc
- br.ret.sptk.many b0
-.recovery:
- adds ret0 = -8, ret0;;
- ld8 val2 = [ret0], 8 // bomb out here
- br.cond.sptk .back
-END(strchr)
-
-weak_alias (strchr, index)
-libc_hidden_builtin_def (strchr)