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Diffstat (limited to 'ports/sysdeps/ia64/strchr.S')
| -rw-r--r-- | ports/sysdeps/ia64/strchr.S | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/ports/sysdeps/ia64/strchr.S b/ports/sysdeps/ia64/strchr.S deleted file mode 100644 index ad059499db..0000000000 --- a/ports/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) 2000-2014 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) |