MIPS celsius to fahrenheit
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## Celsius to fahrenheit
.data
msg:
.asciiz "Enter celsius : "
const9:
.float 9.0
const5:
.float 5.0
const32:
.float 32.0
zeroF:
.float 0.0
.text
.globl main
main:
## Expand stack and save $ra
addi $sp, $sp, -4
sw $ra, ($sp)
li $v0, 4
## print\_str syscall number
la $a0, msg
## arg0 : msg
syscall
li $v0, 6
## read\_float syscall number
syscall
## $f0 - user input float number
jal c2f
li $v0, 2
## print\_float syscall number
lwc1 $f4, zeroF
## $f4 = 0.0
add.s $f12, $f0, $f4
## move $f0 to $f12. $f12 is arg.
syscall
## Shrink stack and load $ra
lw $ra, ($sp)
addi $sp, $sp, 4
jr $ra
c2f:
lwc1 $f16, const5
## $f16 = 5.0 (ldc1, load double coprocess1)
lwc1 $f18, const9
## $f18 = 9.0
div.s $f18, $f18, $f16
## $f18 = 9.0 / 5.0
mul.s $f0, $f0, $f18
## $f0 = $f0 \* 9/5
lwc1 $f16, const32
add.s $f0, $f0, $f16
## $f0 = $f0 + 32
jr $ra
실수를 계산하는 coprocessor 레지스터($f0, $f1, ...)와 정수 레지스터간 데이터 교환
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mtc1 $t0, $f0 #move to coprocess1
mfc1 $t0, $f0 #move from coprocess1
실수↔정수 형변환
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cvt.s.w $f0, $f0 # Convert to Single from Integer
cvt.w.s $f0, $f0 # Convert to Integer from Single
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