projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 79b7c863 | 1 | /* Copyright (C) 2000, 2003 Free Software Foundation, Inc. |
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2 | Contributed by Richard Henderson <rth@tamu.edu>, 1996. |
| 3 | EV67 optimized by Rick Gorton <rick.gorton@alpha-processor.com>. | |
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4 | This file is part of the GNU C Library. |
| 5 | ||
| 6 | The GNU C Library is free software; you can redistribute it and/or | |
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7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either | |
| 9 | version 2.1 of the License, or (at your option) any later version. | |
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10 | |
| 11 | The GNU C Library is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 3214b89b | 14 | Lesser General Public License for more details. |
| 45327bf7 | 15 | |
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16 | You should have received a copy of the GNU Lesser General Public |
| 17 | License along with the GNU C Library; if not, write to the Free | |
| 18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
| 19 | 02111-1307 USA. */ | |
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20 | |
| 21 | /* Append a null-terminated string from SRC to DST. */ | |
| 22 | ||
| 23 | #include <sysdep.h> | |
| 24 | ||
| 25 | .arch ev6 | |
| 26 | .set noreorder | |
| 27 | .text | |
| 28 | ||
| 29 | ENTRY(strcat) | |
| 30 | ldgp gp, 0(pv) | |
| 31 | #ifdef PROF | |
| 32 | .set noat | |
| 33 | lda AT, _mcount | |
| 34 | jsr AT, (AT), _mcount | |
| 35 | .set at | |
| 36 | #endif | |
| 37 | .prologue 1 | |
| 38 | ||
| 39 | mov $16, $0 # E : set up return value | |
| 40 | /* Find the end of the string. */ | |
| 41 | ldq_u $1, 0($16) # L : load first quadword (a0 may be misaligned) | |
| 42 | lda $2, -1 # E : | |
| 43 | insqh $2, $16, $2 # U : | |
| 44 | ||
| 45 | andnot $16, 7, $16 # E : | |
| 46 | or $2, $1, $1 # E : | |
| 47 | cmpbge $31, $1, $2 # E : bits set iff byte == 0 | |
| 48 | bne $2, $found # U : | |
| 49 | ||
| 50 | $loop: ldq $1, 8($16) # L : | |
| 51 | addq $16, 8, $16 # E : | |
| 52 | cmpbge $31, $1, $2 # E : | |
| 53 | beq $2, $loop # U : | |
| 54 | ||
| 55 | $found: cttz $2, $3 # U0 : | |
| 56 | addq $16, $3, $16 # E : | |
| 57 | /* Now do the append. */ | |
| 58 | mov $26, $23 # E : | |
| 59 | jmp $31, __stxcpy # L0 : | |
| 60 | ||
| 61 | END(strcat) | |
| 79b7c863 | 62 | libc_hidden_builtin_def (strcat) |