USA: +1 (725) 712-1730 
Sign in
MIPS assembly code for adding (addition of) and subtracting (subtraction of) two signed numbers (positive and negative numbers) . Need code for both methods. Using registers and hardware only aka “logical operations”. Cannot use just MIPS add and sub. Need to use bit operations.
Expert Answer
For addition:
.file 1 ""
.section .mdebug.abi32
.previous
.gnu_attribute 4, 1
.abicalls
.rdata
.align 2
$LC0:
.ascii "%d %d 00"
.align 2
$LC1:
.ascii "%d 00"
.text
.align 2
.globl main
$LFB0 = .
.set nomips16
.ent main
.type main, @function
main:
.frame $fp,48,$31 # vars= 16, regs= 2/0, args= 16, gp= 8
.mask 0xc0000000,-4
.fmask 0x00000000,0
.set noreorder
.cpload $25
.set nomacro
addiu $sp,$sp,-48
$LCFI0:
sw $31,44($sp)
$LCFI1:
sw $fp,40($sp)
movz $31,$31,$0
$LCFI2:
move $fp,$sp
$LCFI3:
.cprestore 16
addiu $3,$fp,28
addiu $2,$fp,32
lw $4,%got($LC0)($28)
nop
addiu $4,$4,%lo($LC0)
move $5,$3
move $6,$2
lw $2,%call16(scanf)($28)
nop
move $25,$2
jalr $25
nop
lw $28,16($fp)
lw $3,28($fp)
lw $2,32($fp)
move $4,$3
move $5,$2
lw $2,%got(_Z3sumii)($28)
nop
move $25,$2
jalr $25
nop
lw $28,16($fp)
sw $2,24($fp)
lw $2,%got($LC1)($28)
nop
addiu $4,$2,%lo($LC1)
lw $5,24($fp)
lw $2,%call16(printf)($28)
nop
move $25,$2
jalr $25
nop
lw $28,16($fp)
move $2,$0
move $sp,$fp
lw $31,44($sp)
lw $fp,40($sp)
addiu $sp,$sp,48
j $31
nop
.set macro
.set reorder
.end main
$LFE0:
.size main, .-main
.align 2
.globl _Z3sumii
$LFB1 = .
.set nomips16
.ent _Z3sumii
.type _Z3sumii, @function
_Z3sumii:
.frame $fp,8,$31 # vars= 0, regs= 1/0, args= 0, gp= 0
.mask 0x40000000,-4
.fmask 0x00000000,0
.set noreorder
.set nomacro
addiu $sp,$sp,-8
$LCFI4:
sw $fp,4($sp)
$LCFI5:
move $fp,$sp
movz $31,$31,$0
$LCFI6:
sw $4,8($fp)
sw $5,12($fp)
lw $3,8($fp)
lw $2,12($fp)
nop
addu $2,$3,$2
move $sp,$fp
lw $fp,4($sp)
addiu $sp,$sp,8
j $31
nop
.set macro
.set reorder
.end _Z3sumii
$LFE1:
.size _Z3sumii, .-_Z3sumii
.section .eh_frame,"aw",@progbits
$Lframe1:
.4byte $LECIE1-$LSCIE1
$LSCIE1:
.4byte 0x0
.byte 0x1
.globl __gxx_personality_v0
.ascii "zP 00"
.uleb128 0x1
.sleb128 -4
.byte 0x1f
.uleb128 0x5
.byte 0x0
.4byte __gxx_personality_v0
.byte 0xc
.uleb128 0x1d
.uleb128 0x0
.align 2
$LECIE1:
$LSFDE1:
.4byte $LEFDE1-$LASFDE1
$LASFDE1:
.4byte $LASFDE1-$Lframe1
.4byte $LFB0
.4byte $LFE0-$LFB0
.uleb128 0x0
.byte 0x4
.4byte $LCFI0-$LFB0
.byte 0xe
.uleb128 0x30
.byte 0x4
.4byte $LCFI2-$LCFI0
.byte 0x11
.uleb128 0x1e
.sleb128 2
.byte 0x11
.uleb128 0x1f
.sleb128 1
.byte 0x4
.4byte $LCFI3-$LCFI2
.byte 0xd
.uleb128 0x1e
.align 2
$LEFDE1:
.ident "GCC: (Debian 4.4.5-8) 4.4.5"
For Substraction
.file 1 ""
.section .mdebug.abi32
.previous
.gnu_attribute 4, 1
.abicalls
.rdata
.align 2
$LC0:
.ascii "%d %d 00"
.align 2
$LC1:
.ascii "%d 00"
.text
.align 2
.globl main
$LFB0 = .
.set nomips16
.ent main
.type main, @function
main:
.frame $fp,48,$31 # vars= 16, regs= 2/0, args= 16, gp= 8
.mask 0xc0000000,-4
.fmask 0x00000000,0
.set noreorder
.cpload $25
.set nomacro
addiu $sp,$sp,-48
$LCFI0:
sw $31,44($sp)
$LCFI1:
sw $fp,40($sp)
movz $31,$31,$0
$LCFI2:
move $fp,$sp
$LCFI3:
.cprestore 16
addiu $3,$fp,28
addiu $2,$fp,32
lw $4,%got($LC0)($28)
nop
addiu $4,$4,%lo($LC0)
move $5,$3
move $6,$2
lw $2,%call16(scanf)($28)
nop
move $25,$2
jalr $25
nop
lw $28,16($fp)
lw $3,28($fp)
lw $2,32($fp)
move $4,$3
move $5,$2
lw $2,%got(_Z4diffii)($28)
nop
move $25,$2
jalr $25
nop
lw $28,16($fp)
sw $2,24($fp)
lw $2,%got($LC1)($28)
nop
addiu $4,$2,%lo($LC1)
lw $5,24($fp)
lw $2,%call16(printf)($28)
nop
move $25,$2
jalr $25
nop
lw $28,16($fp)
move $2,$0
move $sp,$fp
lw $31,44($sp)
lw $fp,40($sp)
addiu $sp,$sp,48
j $31
nop
.set macro
.set reorder
.end main
$LFE0:
.size main, .-main
.align 2
.globl _Z4diffii
$LFB1 = .
.set nomips16
.ent _Z4diffii
.type _Z4diffii, @function
_Z4diffii:
.frame $fp,8,$31 # vars= 0, regs= 1/0, args= 0, gp= 0
.mask 0x40000000,-4
.fmask 0x00000000,0
.set noreorder
.set nomacro
addiu $sp,$sp,-8
$LCFI4:
sw $fp,4($sp)
$LCFI5:
move $fp,$sp
movz $31,$31,$0
$LCFI6:
sw $4,8($fp)
sw $5,12($fp)
lw $3,8($fp)
lw $2,12($fp)
nop
subu $2,$3,$2
move $sp,$fp
lw $fp,4($sp)
addiu $sp,$sp,8
j $31
nop
.set macro
.set reorder
.end _Z4diffii
$LFE1:
.size _Z4diffii, .-_Z4diffii
.section .eh_frame,"aw",@progbits
$Lframe1:
.4byte $LECIE1-$LSCIE1
$LSCIE1:
.4byte 0x0
.byte 0x1
.globl __gxx_personality_v0
.ascii "zP 00"
.uleb128 0x1
.sleb128 -4
.byte 0x1f
.uleb128 0x5
.byte 0x0
.4byte __gxx_personality_v0
.byte 0xc
.uleb128 0x1d
.uleb128 0x0
.align 2
$LECIE1:
$LSFDE1:
.4byte $LEFDE1-$LASFDE1
$LASFDE1:
.4byte $LASFDE1-$Lframe1
.4byte $LFB0
.4byte $LFE0-$LFB0
.uleb128 0x0
.byte 0x4
.4byte $LCFI0-$LFB0
.byte 0xe
.uleb128 0x30
.byte 0x4
.4byte $LCFI2-$LCFI0
.byte 0x11
.uleb128 0x1e
.sleb128 2
.byte 0x11
.uleb128 0x1f
.sleb128 1
.byte 0x4
.4byte $LCFI3-$LCFI2
.byte 0xd
.uleb128 0x1e
.align 2
$LEFDE1:
.ident "GCC: (Debian 4.4.5-8) 4.4.5"
