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Diffstat (limited to 'sysdeps/ia64/strncpy.S')
-rw-r--r-- | sysdeps/ia64/strncpy.S | 232 |
1 files changed, 0 insertions, 232 deletions
diff --git a/sysdeps/ia64/strncpy.S b/sysdeps/ia64/strncpy.S deleted file mode 100644 index 6706ab711b..0000000000 --- a/sysdeps/ia64/strncpy.S +++ /dev/null @@ -1,232 +0,0 @@ -/* Optimized version of the standard strncpy() function. - This file is part of the GNU C Library. - Copyright (C) 2000, 2001, 2002, 2003 Free Software Foundation, Inc. - Contributed by Dan Pop <Dan.Pop@cern.ch> - and Jakub Jelinek <jakub@redhat.com>. - - 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: dest - - Inputs: - in0: dest - in1: src - in2: len - - In this form, it assumes little endian mode. - */ - -#include <sysdep.h> -#undef ret - -#define saved_lc r15 -#define saved_pr r16 -#define thresh r17 -#define dest r18 -#define dest2 r19 -#define src r20 -#define len r21 -#define asrc r22 -#define tmp r23 -#define pos r24 -#define w0 r25 -#define w1 r26 -#define c r27 -#define sh2 r28 -#define sh1 r29 -#define loopcnt r30 -#define value r31 - -ENTRY(strncpy) - .prologue - alloc r2 = ar.pfs, 3, 0, 29, 32 - -#define MEMLAT 2 - .rotr r[MEMLAT + 2] - .rotp p[MEMLAT + 1] - - mov ret0 = in0 // return value = dest - .save pr, saved_pr - mov saved_pr = pr // save the predicate registers - .save ar.lc, saved_lc - mov saved_lc = ar.lc // save the loop counter - mov ar.ec = 0 // ec is not guaranteed to - // be zero upon function entry - .body - cmp.geu p6, p5 = 24, in2 -(p6) br.cond.spnt .short_len - sub tmp = r0, in0 ;; // tmp = -dest - mov len = in2 // len - mov dest = in0 // dest - mov src = in1 // src - and tmp = 7, tmp ;; // loopcnt = -dest % 8 - cmp.eq p6, p7 = tmp, r0 - adds loopcnt = -1, tmp // --loopcnt -(p6) br.cond.sptk .dest_aligned ;; - sub len = len, tmp // len -= -dest % 8 - mov ar.lc = loopcnt -.l1: // copy -dest % 8 bytes -(p5) ld1 c = [src], 1 // c = *src++ - ;; - st1 [dest] = c, 1 // *dest++ = c - cmp.ne p5, p7 = c, r0 - br.cloop.dptk .l1 ;; -(p7) br.cond.dpnt .found0_align - -.dest_aligned: // p7 should be cleared here - shr.u c = len, 3 // c = len / 8 - and sh1 = 7, src // sh1 = src % 8 - and asrc = -8, src ;; // asrc = src & -OPSIZ -- align src - adds c = (MEMLAT-1), c // c = (len / 8) + MEMLAT - 1 - sub thresh = 8, sh1 - mov pr.rot = 1 << 16 // set rotating predicates - shl sh1 = sh1, 3 ;; // sh1 = 8 * (src % 8) - mov ar.lc = c // "infinite" loop - sub sh2 = 64, sh1 // sh2 = 64 - sh1 - cmp.eq p6, p0 = sh1, r0 // is the src aligned? -(p6) br.cond.sptk .src_aligned - adds c = -(MEMLAT-1), c ;; // c = (len / 8) - ld8 r[1] = [asrc],8 - mov ar.lc = c ;; - - .align 32 -.l2: -(p6) st8 [dest] = value, 8 // store val to dest - ld8.s r[0] = [asrc], 8 - shr.u value = r[1], sh1 ;; // value = w0 >> sh1 - czx1.r pos = value ;; // do we have an "early" zero - cmp.lt p7, p0 = pos, thresh // in w0 >> sh1? - adds len = -8, len // len -= 8 -(p7) br.cond.dpnt .nonalign_found0 - chk.s r[0], .recovery2 // it is safe to do that only -.back2: // after the previous test - shl tmp = r[0], sh2 // tmp = w1 << sh2 - ;; - or value = value, tmp ;; // value |= tmp - czx1.r pos = value ;; - cmp.ne p7, p6 = 8, pos -(p7) br.cond.dpnt .nonalign_found0 - br.ctop.dptk .l2 ;; - adds len = 8, len - br.cond.sptk .not_found0 ;; -.nonalign_found0: - cmp.gtu p6, p0 = -8, len -(p6) br.cond.dptk .found0 - adds len = 8, len - br.cond.sptk .not_found0 ;; - - .align 32 -.src_aligned: -.l3: -(p[0]) ld8.s r[0] = [src], 8 -(p[MEMLAT]) chk.s r[MEMLAT], .recovery3 -.back3: -(p[MEMLAT]) mov value = r[MEMLAT] -(p[MEMLAT]) czx1.r pos = r[MEMLAT] ;; -(p[MEMLAT]) cmp.ne p7, p0 = 8, pos -(p[MEMLAT]) adds len = -8, len // len -= 8 -(p7) br.cond.dpnt .found0 -(p[MEMLAT]) st8 [dest] = r[MEMLAT], 8 - br.ctop.dptk .l3 ;; - - chk.s r[MEMLAT-1], .recovery4 -.back4: - mov value = r[MEMLAT-1] - -.not_found0: - cmp.eq p5, p6 = len, r0 - adds len = -1, len -(p5) br.cond.dptk .restore_and_exit ;; - mov ar.lc = len -.l4: -(p6) extr.u c = value, 0, 8 // c = value & 0xff -(p6) shr.u value = value, 8 ;; - st1 [dest] = c, 1 - cmp.ne p6, p0 = c, r0 - br.cloop.dptk .l4 - br.cond.sptk .restore_and_exit - -.found0_align: - mov pos = 0 - adds len = -8, len - mov value = 0 ;; -.found0: - shl tmp = pos, 3 - shr.u loopcnt = len, 4 // loopcnt = len / 16 - mov c = -1 ;; - cmp.eq p6, p0 = loopcnt, r0 - adds loopcnt = -1, loopcnt - shl c = c, tmp ;; - and len = 0xf, len - andcm value = value, c - mov ar.lc = loopcnt ;; - cmp.le p7, p0 = 8, len - adds dest2 = 16, dest - st8 [dest] = value, 8 - and len = 0x7, len -(p6) br.cond.dpnt .l6 ;; -.l5: - st8 [dest] = r0, 16 - st8 [dest2] = r0, 16 - br.cloop.dptk .l5 ;; -.l6: -(p7) st8 [dest] = r0, 8 - cmp.eq p5, p0 = len, r0 - adds len = -1, len -(p5) br.cond.dptk .restore_and_exit ;; - mov ar.lc = len ;; -.l7: - st1 [dest] = r0, 1 - br.cloop.dptk .l7 ;; -.restore_and_exit: - mov ar.lc = saved_lc // restore the loop counter - mov pr = saved_pr, -1 // restore the predicate registers - br.ret.sptk.many b0 - -.short_len: - cmp.eq p5, p0 = in2, r0 - adds loopcnt = -1, in2 -(p5) br.cond.spnt .restore_and_exit ;; - mov ar.lc = loopcnt // p6 should be set when we get here -.l8: -(p6) ld1 c = [in1], 1 // c = *src++ - ;; - st1 [in0] = c, 1 // *dest++ = c -(p6) cmp.ne p6, p0 = c, r0 - br.cloop.dptk .l8 - ;; - mov ar.lc = saved_lc // restore the loop counter - mov pr = saved_pr, -1 // restore the predicate registers - br.ret.sptk.many b0 -.recovery2: - add c = 8, len - add tmp = -8, asrc ;; - cmp.gtu p8, p5 = c, thresh ;; -(p8) ld8 r[0] = [tmp] -(p5) mov r[0] = r0 - br.cond.sptk .back2 -.recovery3: - add tmp = -(MEMLAT + 1) * 8, src ;; - ld8 r[MEMLAT] = [tmp] - br.cond.sptk .back3 -.recovery4: - cmp.eq p5, p6 = len, r0 - add tmp = -MEMLAT * 8, src ;; -(p6) ld8 r[MEMLAT - 1] = [tmp] -(p5) mov r[MEMLAT - 1] = r0 - br.cond.sptk .back4 -END(strncpy) -libc_hidden_builtin_def (strncpy) |