| 0,0 → 1,111 |
|---|
| # |
| # Copyright (C) 2006 Martin Decky |
| # All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions |
| # are met: |
| # |
| # - Redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer. |
| # - Redistributions in binary form must reproduce the above copyright |
| # notice, this list of conditions and the following disclaimer in the |
| # documentation and/or other materials provided with the distribution. |
| # - The name of the author may not be used to endorse or promote products |
| # derived from this software without specific prior written permission. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| # |
| |
| #include "regname.h" |
| |
| .set noat |
| .set noreorder |
| .set nomacro |
| |
| .text |
| |
| .global halt |
| .global memcpy |
| .global jump_to_kernel |
| |
| halt: |
| b halt |
| nop |
| |
| memcpy: |
| addiu $v0,$a1,3 |
| li $v1,-4 # 0xfffffffffffffffc |
| and $v0,$v0,$v1 |
| beq $a1,$v0,3f |
| move $t0,$a0 |
| |
| 0: |
| beq $a2,$zero,2f |
| move $a3,$zero |
| |
| 1: |
| addu $v0,$a1,$a3 |
| lbu $a0,0($v0) |
| addu $v1,$t0,$a3 |
| addiu $a3,$a3,1 |
| bne $a3,$a2,1b |
| sb $a0,0($v1) |
| |
| 2: |
| jr $ra |
| move $v0,$a1 |
| |
| 3: |
| addiu $v0,$a0,3 |
| and $v0,$v0,$v1 |
| bne $a0,$v0,0b |
| srl $t1,$a2,2 |
| |
| beq $t1,$zero,5f |
| move $a3,$zero |
| |
| move $a3,$zero |
| move $a0,$zero |
| 4: |
| addu $v0,$a1,$a0 |
| lw $v1,0($v0) |
| addiu $a3,$a3,1 |
| addu $v0,$t0,$a0 |
| sw $v1,0($v0) |
| bne $a3,$t1,4b |
| addiu $a0,$a0,4 |
| |
| 5: |
| andi $a2,$a2,0x3 |
| beq $a2,$zero,2b |
| nop |
| |
| sll $v0,$a3,2 |
| addu $t1,$v0,$t0 |
| move $a3,$zero |
| addu $t0,$v0,$a1 |
| 6: |
| addu $v0,$t0,$a3 |
| lbu $a0,0($v0) |
| addu $v1,$t1,$a3 |
| addiu $a3,$a3,1 |
| bne $a3,$a2,6b |
| sb $a0,0($v1) |
| |
| jr $ra |
| move $v0,$a1 |
| |
| jump_to_kernel: |
| # .word 0x39 |
| j $a0 |
| nop |