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authorUlrich Drepper <drepper@gmail.com>2012-01-07 11:19:05 -0500
committerUlrich Drepper <drepper@gmail.com>2012-01-07 11:19:05 -0500
commitd75a0a62b12c35ee85f786d5f8d155ab39909411 (patch)
treec3479d23878ef4ab05629d4a60f4f7623269c1dd /sysdeps/ia64/memchr.S
parentdcc9756b5bfbb2b97f73bad863d7e1c4002bea98 (diff)
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Remove IA-64 support
Diffstat (limited to 'sysdeps/ia64/memchr.S')
-rw-r--r--sysdeps/ia64/memchr.S161
1 files changed, 0 insertions, 161 deletions
diff --git a/sysdeps/ia64/memchr.S b/sysdeps/ia64/memchr.S
deleted file mode 100644
index 355effe..0000000
--- a/sysdeps/ia64/memchr.S
+++ /dev/null
@@ -1,161 +0,0 @@
-/* Optimized version of the standard memchr() function.
- This file is part of the GNU C Library.
- Copyright (C) 2000, 2001, 2003, 2010 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, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
-/* Return: the address of the first occurence of chr in str or NULL
-
- Inputs:
- in0: str
- in1: chr
- in2: byte count
-
- This implementation assumes little endian mode. For big endian mode,
- the instruction czx1.r should be replaced by czx1.l.
-
- The algorithm is fairly straightforward: search byte by byte until we
- we get to a word aligned address, then search word by word as much as
- possible; the remaining few bytes are searched one at a time.
-
- The word by word search is performed by xor-ing the word with a word
- containing chr in every byte. If there is a hit, the result will
- contain a zero byte in the corresponding position. The presence and
- position of that zero byte is detected with a czx instruction.
-
- All the loops in this function could have had the internal branch removed
- if br.ctop and br.cloop could be predicated :-(. */
-
-#include <sysdep.h>
-#undef ret
-
-#define saved_pr r15
-#define saved_lc r16
-#define chr r17
-#define len r18
-#define last r20
-#define val r21
-#define tmp r24
-#define chrx8 r25
-#define loopcnt r30
-
-#define str in0
-
-ENTRY(__memchr)
- .prologue
- alloc r2 = ar.pfs, 3, 0, 29, 32
-#include "softpipe.h"
- .rotr value[MEMLAT+1], addr[MEMLAT+3], aux[2], poschr[2]
- .rotp p[MEMLAT+3]
- .save ar.lc, saved_lc
- mov saved_lc = ar.lc // save the loop counter
- .save pr, saved_pr
- mov saved_pr = pr // save the predicates
- .body
- mov ret0 = str
- add last = str, in2 // last byte
- and tmp = 7, str // tmp = str % 8
- cmp.ne p7, p0 = r0, r0 // clear p7
- extr.u chr = in1, 0, 8 // chr = (unsigned char) in1
- mov len = in2
- cmp.gtu p6, p0 = 16, in2 // use a simple loop for short
-(p6) br.cond.spnt .srchfew ;; // searches
- sub loopcnt = 8, tmp // loopcnt = 8 - tmp
- cmp.eq p6, p0 = tmp, r0
-(p6) br.cond.sptk .str_aligned;;
- sub len = len, loopcnt
- adds loopcnt = -1, loopcnt;;
- mov ar.lc = loopcnt
-.l1:
- ld1 val = [ret0], 1
- ;;
- cmp.eq p6, p0 = val, chr
-(p6) br.cond.spnt .foundit
- br.cloop.sptk .l1 ;;
-.str_aligned:
- cmp.ne p6, p0 = r0, r0 // clear p6
- shr.u loopcnt = len, 3 // loopcnt = len / 8
- and len = 7, len ;; // remaining len = len & 7
- adds loopcnt = -1, loopcnt
- mov ar.ec = MEMLAT + 3
- mux1 chrx8 = chr, @brcst ;; // get a word full of chr
- mov ar.lc = loopcnt
- mov pr.rot = 1 << 16 ;;
-.l2:
-(p[0]) mov addr[0] = ret0
-(p[0]) ld8.s value[0] = [ret0], 8 // speculative load
-(p[MEMLAT]) chk.s value[MEMLAT], .recovery // check and recovery
-(p[MEMLAT]) xor aux[0] = value[MEMLAT], chrx8
-(p[MEMLAT+1]) czx1.r poschr[0] = aux[1]
-(p[MEMLAT+2]) cmp.ne p7, p0 = 8, poschr[1]
-(p7) br.cond.dpnt .foundit
- br.ctop.dptk .l2
-.srchfew:
- adds loopcnt = -1, len
- cmp.eq p6, p0 = len, r0
-(p6) br.cond.spnt .notfound ;;
- mov ar.lc = loopcnt
-.l3:
- ld1 val = [ret0], 1
- ;;
- cmp.eq p6, p0 = val, chr
-(p6) br.cond.dpnt .foundit
- br.cloop.sptk .l3 ;;
-.notfound:
- cmp.ne p6, p0 = r0, r0 // clear p6 (p7 was already 0 when we got here)
- mov ret0 = r0 ;; // return NULL
-.foundit:
- .pred.rel "mutex" p6, p7
-(p6) adds ret0 = -1, ret0 // if we got here from l1 or l3
-(p7) add ret0 = addr[MEMLAT+2], poschr[1] // if we got here from l2
- mov pr = saved_pr, -1
- mov ar.lc = saved_lc
- br.ret.sptk.many b0
-
-.recovery:
-#if MEMLAT != 6
-# error "MEMLAT must be 6!"
-#endif
-(p[MEMLAT-6]) add ret0 = -8, ret0;;
-(p[MEMLAT-5]) add ret0 = -8, ret0;;
-(p[MEMLAT-4]) add ret0 = -8, ret0;;
-(p[MEMLAT-3]) add ret0 = -8, ret0;;
-(p[MEMLAT-2]) add ret0 = -8, ret0;;
-(p[MEMLAT-1]) add ret0 = -8, ret0;;
-(p[MEMLAT]) add ret0 = -8, ret0;;
-(p[MEMLAT+1]) add ret0 = -8, ret0;;
-(p[MEMLAT+2]) add ret0 = -8, ret0;;
-.l4:
- mov addr[MEMLAT+2] = ret0
- ld8 tmp = [ret0];; // load the first unchecked 8byte
- xor aux[1] = tmp, chrx8;;
- czx1.r poschr[1] = aux[1];;
- cmp.ne p7, p0 = 8, poschr[1];;
-(p7) add ret0 = addr[MEMLAT+2], poschr[1];;
-(p7) cmp.geu p6, p7 = ret0, last // don't go over the last byte
-(p6) br.cond.spnt .notfound;;
-(p7) br.cond.spnt .foundit;;
- adds ret0 = 8, ret0 // load the next unchecked 8byte
- br.sptk .l4;;
-
-END(__memchr)
-
-weak_alias (__memchr, memchr)
-#if !__BOUNDED_POINTERS__
-weak_alias (__memchr, __ubp_memchr)
-#endif
-libc_hidden_builtin_def (memchr)