| cc68a136 |
1 | /* Copyright (C) 1998 Free Software Foundation, Inc.\r |
| 2 | This file is part of the GNU C Library.\r |
| 3 | Contributed by Philip Blundell <philb@gnu.org>\r |
| 4 | \r |
| 5 | The GNU C Library is free software; you can redistribute it and/or\r |
| 6 | modify it under the terms of the GNU Lesser General Public\r |
| 7 | License as published by the Free Software Foundation; either\r |
| 8 | version 2.1 of the License, or (at your option) any later version.\r |
| 9 | \r |
| 10 | The GNU C Library is distributed in the hope that it will be useful,\r |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of\r |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\r |
| 13 | Lesser General Public License for more details.\r |
| 14 | \r |
| 15 | You should have received a copy of the GNU Lesser General Public\r |
| 16 | License along with the GNU C Library; if not, write to the Free\r |
| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA\r |
| 18 | 02111-1307 USA. */\r |
| 19 | \r |
| 20 | @ #include <sys/syscall.h>\r |
| 21 | \r |
| 22 | .text\r |
| 23 | .global memset\r |
| 24 | .type memset,%function\r |
| 25 | .align 4\r |
| 26 | \r |
| 27 | memset:\r |
| 28 | mov a4, a1\r |
| 29 | cmp a3, $8 @ at least 8 bytes to do?\r |
| 30 | blt 2f\r |
| 31 | orr a2, a2, a2, lsl $8\r |
| 32 | orr a2, a2, a2, lsl $16\r |
| 33 | 1:\r |
| 34 | tst a4, $3 @ aligned yet?\r |
| 35 | strneb a2, [a4], $1\r |
| 36 | subne a3, a3, $1\r |
| 37 | bne 1b\r |
| 38 | mov ip, a2\r |
| 39 | 1:\r |
| 40 | cmp a3, $8 @ 8 bytes still to do?\r |
| 41 | blt 2f\r |
| 42 | stmia a4!, {a2, ip}\r |
| 43 | sub a3, a3, $8\r |
| 44 | cmp a3, $8 @ 8 bytes still to do?\r |
| 45 | blt 2f\r |
| 46 | stmia a4!, {a2, ip}\r |
| 47 | sub a3, a3, $8\r |
| 48 | cmp a3, $8 @ 8 bytes still to do?\r |
| 49 | blt 2f\r |
| 50 | stmia a4!, {a2, ip}\r |
| 51 | sub a3, a3, $8\r |
| 52 | cmp a3, $8 @ 8 bytes still to do?\r |
| 53 | stmgeia a4!, {a2, ip}\r |
| 54 | subge a3, a3, $8\r |
| 55 | bge 1b\r |
| 56 | 2:\r |
| 57 | movs a3, a3 @ anything left?\r |
| 58 | moveq pc, lr @ nope\r |
| 59 | rsb a3, a3, $7\r |
| 60 | add pc, pc, a3, lsl $2\r |
| 61 | mov r0, r0\r |
| 62 | strb a2, [a4], $1\r |
| 63 | strb a2, [a4], $1\r |
| 64 | strb a2, [a4], $1\r |
| 65 | strb a2, [a4], $1\r |
| 66 | strb a2, [a4], $1\r |
| 67 | strb a2, [a4], $1\r |
| 68 | strb a2, [a4], $1\r |
| 69 | mov pc, lr\r |
| 70 | \r |
| 71 | .size memset,.-memset;\r |
| 72 | \r |
notaz.gp2x.de / picodrive.git / blame