Answer to Question #281373 in Assembler for Mengal

Question

Take 4 values in floating-point double precision and compare which one is smaller and display the output using MIPS.

Answer 1

#1. read double n1 n2 n3 n4

#2. smaller

# MIPS assembly

#************************************************

.data

msgEnd:   .asciiz "\n...Finish"

msgEnterN:   .asciiz "Enter N"

msgAnswer:   .asciiz "\nSmaller: "

# code segment

   .text

   .globl main

main:  

   li $v0,4         # print string

   la $a0,msgEnterN   # "Enter N"

   syscall            # make the syscall print string

   li $v0,11         # print char

   li $a0,'1'          # 1

   syscall      

   li $v0,11         # print char

   li $a0,' '          # space

   syscall         

#reads and store the n1

   li $v0, 7         # read n1 to $f0

   syscall            # make the syscall   read

   mov.d $f14, $f0

   li $v0,4         # print string

   la $a0,msgEnterN   # "Enter N"

   syscall            # make the syscall print string

   li $v0,11         # print char

   li $a0,'2'          # 2

   syscall      

   li $v0,11         # print char

   li $a0,' '          # space

   syscall   

#reads and store the n2

   li $v0, 7         # read n2 to $f0

   syscall            # make the syscall   read

   mov.d $f16, $f0

   li $v0,4         # print string

   la $a0,msgEnterN   # "Enter N"

   syscall            # make the syscall print string

   li $v0,11         # print char

   li $a0,'3'          # 3

   syscall      

   li $v0,11         # print char

   li $a0,' '          # space

   syscall   

#reads and store the n3

   li $v0, 7         # read n3 to $f0

   syscall            # make the syscall   read

   mov.d $f18, $f0

   li $v0,4         # print string

   la $a0,msgEnterN   # "Enter N"

   syscall            # make the syscall print string

   li $v0,11         # print char

   li $a0,'4'          # 4

   syscall      

   li $v0,11         # print char

   li $a0,' '          # space

   syscall   

#reads and store the n4

   li $v0, 7         # read n4 to $f0

   syscall            # make the syscall   read

   mov.d $f20, $f0

# Smaller:

   mov.d $f12, $f14      # $f12 = begining min

   c.le.d $f12, $f16   # min compare with n2

   bc1t next1            # min <= n2

   mov.d $f12, $f16      # else $f12 = new min

next1:

   c.le.d $f12, $f18   # min compare with n3

   bc1t next2            # min <= n3

   mov.d $f12, $f18      # else $f12 = new min

next2:   

   c.le.d $f12, $f20   # min compare with n4

   bc1t smaller            # min <= n4

   mov.d $f12, $f20      # else $f12 = new min   

smaller:

   li $v0,4         # print string

   la $a0,msgAnswer   # "Smaller: "

   syscall            # make the syscall print string

   li   $v0,3         # Print 

   syscall            # make the syscall print    

finish:   

   li $v0,4         # print string

   la $a0,msgEnd      # "Finish"

   syscall            # make the syscall

   li   $v0, 10   # finished .. stop .. return

   syscall