c.eq.s $f0,$f2 # is A = B?
bc1t printEQ # yes: print equal
c.lt.s $f2,$f0 # is B < A?
bc1t printB # yes: print B
# otherwise A < B
Here is the complete program. There is nothing new in the remainder of the code.
## min.asm --- determine the min of two floats
##
.text
.globl main
main: # get the values into registers
l.s $f0,A
l.s $f2,B
c.lt.s $f0,$f2 # is A < B?
bc1t printA # yes -- print A
c.lt.s $f2,$f0 # is B < A?
bc1t printB # yes -- print B
la $a0,EQmsg # otherwise
li $v0,4 # they are equal
syscall
mov.s $f12,$f0 # print one of them
b prtnum
printA: la $a0,Amsg # message for A
li $v0,4
syscall
mov.s $f12,$f0 # print A
b prtnum
printB: la $a0,Bmsg # message for B
li $v0,4
syscall
mov.s $f12,$f2 # print B
prtnum: li $v0,2 # print single precision
# value in $f12
syscall
la $a0,newl
li $v0,4 # print new line
syscall
jr $ra # return to OS
.data
A: .float 4.830
B: .float 1.012
Amsg: .asciiz "A is smallest: "
Bmsg: .asciiz "B is smallest: "
EQmsg: .asciiz "They are equal: "
newl: .asciiz "\n"
Would you expect the condition bit (of the FPU) to keep its value until it is altered by another comparison instruction?