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Diffstat (limited to 'sysdeps/alpha/strchr.S')
| -rw-r--r-- | sysdeps/alpha/strchr.S | 95 |
1 files changed, 0 insertions, 95 deletions
diff --git a/sysdeps/alpha/strchr.S b/sysdeps/alpha/strchr.S deleted file mode 100644 index e0b17415ac..0000000000 --- a/sysdeps/alpha/strchr.S +++ /dev/null @@ -1,95 +0,0 @@ -/* Copyright (C) 1996, 2003 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Richard Henderson (rth@tamu.edu) - - 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 a given character within a null-terminated - string, or null if it is not found. - - This is generally scheduled for the EV5 (got to look out for my own - interests :-), but with EV4 needs in mind. There *should* be no more - stalls for the EV4 than there are for the EV5. -*/ - -#include <sysdep.h> - - .set noreorder - .set noat - -ENTRY(strchr) -#ifdef PROF - ldgp gp, 0(pv) - lda AT, _mcount - jsr AT, (AT), _mcount - .prologue 1 -#else - .prologue 0 -#endif - - zapnot a1, 1, a1 # e0 : zero extend the search character - ldq_u t0, 0(a0) # .. e1 : load first quadword - sll a1, 8, t5 # e0 : replicate the search character - andnot a0, 7, v0 # .. e1 : align our loop pointer - or t5, a1, a1 # e0 : - lda t4, -1 # .. e1 : build garbage mask - sll a1, 16, t5 # e0 : - cmpbge zero, t0, t2 # .. e1 : bits set iff byte == zero - mskqh t4, a0, t4 # e0 : - or t5, a1, a1 # .. e1 : - sll a1, 32, t5 # e0 : - cmpbge zero, t4, t4 # .. e1 : bits set iff byte is garbage - or t5, a1, a1 # e0 : - xor t0, a1, t1 # .. e1 : make bytes == c zero - cmpbge zero, t1, t3 # e0 : bits set iff byte == c - or t2, t3, t0 # e1 : bits set iff char match or zero match - andnot t0, t4, t0 # e0 : clear garbage bits - bne t0, $found # .. e1 (zdb) - -$loop: ldq t0, 8(v0) # e0 : - addq v0, 8, v0 # .. e1 : - nop # e0 : - xor t0, a1, t1 # .. e1 (ev5 data stall) - cmpbge zero, t0, t2 # e0 : bits set iff byte == 0 - cmpbge zero, t1, t3 # .. e1 : bits set iff byte == c - or t2, t3, t0 # e0 : - beq t0, $loop # .. e1 (zdb) - -$found: negq t0, t1 # e0 : clear all but least set bit - and t0, t1, t0 # e1 (stall) - - and t0, t3, t1 # e0 : bit set iff byte was the char - beq t1, $retnull # .. e1 (zdb) - - and t0, 0xf0, t2 # e0 : binary search for that set bit - and t0, 0xcc, t3 # .. e1 : - and t0, 0xaa, t4 # e0 : - cmovne t2, 4, t2 # .. e1 : - cmovne t3, 2, t3 # e0 : - cmovne t4, 1, t4 # .. e1 : - addq t2, t3, t2 # e0 : - addq v0, t4, v0 # .. e1 : - addq v0, t2, v0 # e0 : - ret # .. e1 : - -$retnull: - mov zero, v0 # e0 : - ret # .. e1 : - - END(strchr) - -weak_alias (strchr, index) -libc_hidden_builtin_def (strchr) |