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Join Date: Nov 2006
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Optimizing MIPS in SPIM
Hey guys (newbie to the forums.... play nice!),
In my final project of the semester I was given C code, which I then had to switch into MIPS.. after taking it to my professor he told me I needed to optimize it using $v and $a registers... and I'm stuck and running out of time.
Payment is doable if this does in fact take a whole lot of effort for those expert programmers out there  . I have to get this done by Thursday and I have hit a brick wall.
.text
memset:
addiu $sp,$sp,-16
sw $fp,8($sp)
move $fp,$sp
sw $a0,16($fp)
sw $a1,20($fp)
sw $a2,24($fp)
lw $v0,20($fp)
sb $v0,0($fp)
lw $v0,16($fp)
sw $v0,4($fp)
L2:
lw $v0,24($fp)
beq $v0,$0,L3
lw $v1,4($fp)
lbu $v0,0($fp)
sb $v0,0($v1)
lw $v0,4($fp)
addiu $v0,$v0,1
sw $v0,4($fp)
lw $v0,24($fp)
addiu $v0,$v0,-1
sw $v0,24($fp)
j L2
L3:
lw $v0,16($fp)
move $sp,$fp
lw $fp,8($sp)
addiu $sp,$sp,16
j $ra
a_memmove:
addiu $sp,$sp,-16
sw $fp,8($sp)
move $fp,$sp
sw $a0,16($fp)
sw $a1,20($fp)
sw $a2,24($fp)
lw $v0,16($fp)
sw $v0,0($fp)
lw $v0,20($fp)
sw $v0,4($fp)
lw $v1,4($fp)
lw $v0,0($fp)
sltu $v0,$v1,$v0
beq $v0,$0,L11
lw $v1,4($fp)
lw $v0,24($fp)
addu $v1,$v1,$v0
lw $v0,0($fp)
sltu $v0,$v0,$v1
beq $v0,$0,L11
lw $v1,0($fp)
lw $v0,24($fp)
addu $v0,$v1,$v0
sw $v0,0($fp)
lw $v1,4($fp)
lw $v0,24($fp)
addu $v0,$v1,$v0
sw $v0,4($fp)
L7:
lw $v0,24($fp)
beq $v0,$0,L10
lw $v0,0($fp)
addiu $v0,$v0,-1
move $v1,$v0
sw $v1,0($fp)
lw $v0,4($fp)
addiu $v0,$v0,-1
sw $v0,4($fp)
lbu $v0,0($v0)
sb $v0,0($v1)
lw $v0,24($fp)
addiu $v0,$v0,-1
sw $v0,24($fp)
j L7
L11:
lw $v0,24($fp)
beq $v0,$0,L10
lw $v1,0($fp)
addiu $a0,$fp,4
lw $v0,0($a0)
lbu $a1,0($v0)
addiu $v0,$v0,1
sw $v0,0($a0)
move $v0,$v1
sb $a1,0($v0)
addiu $v1,$v1,1
sw $v1,0($fp)
lw $v0,24($fp)
addiu $v0,$v0,-1
sw $v0,24($fp)
j L11
L10:
lw $v0,16($fp)
move $sp,$fp
lw $fp,8($sp)
addiu $sp,$sp,16
j $ra
a_strcat:
addiu $sp,$sp,-16
sw $fp,8($sp)
move $fp,$sp
sw $a0,16($fp)
sw $a1,20($fp)
sw $a2,24($fp)
lw $v0,16($fp)
sw $v0,0($fp)
L15:
lw $v0,0($fp)
lb $v0,0($v0)
beq $v0,$0,L18
lw $v0,0($fp)
addiu $v0,$v0,1
sw $v0,0($fp)
j L15
L18:
lw $v0,24($fp)
beq $v0,$0,L19
lw $v0,20($fp)
lb $v0,0($v0)
beq $v0,$0,L19
lw $v1,0($fp)
addiu $a0,$fp,20
lw $v0,0($a0)
lbu $a1,0($v0)
addiu $v0,$v0,1
sw $v0,0($a0)
move $v0,$v1
sb $a1,0($v0)
addiu $v1,$v1,1
sw $v1,0($fp)
lw $v0,24($fp)
addiu $v0,$v0,-1
sw $v0,24($fp)
j L18
L19:
lw $v0,0($fp)
sb $0,0($v0)
lw $v0,16($fp)
move $sp,$fp
lw $fp,8($sp)
addiu $sp,$sp,16
j $ra
I think I have memset pretty much done, which looks like this
memset:
move $v1, $a0
L2:
beq $a2, $0, L3
addiu $a2, $a2, -1
lbu $v0, 0($a1)
addiu $a1, $a1, 1
sb $v0, 0($v1)
j L2
L3:
j $ra
move $va, $a0
Guys ... I'm desperate! If this wasn't so important I wouldn't be doing this, but please.... somebody... anybody....  Thanks for your time |
Nov 28th, 2006, 4:14 PM
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