Example Program

Here is a program that serves no practical purpose except as an example. The program loads a general purpose register with a two's complement 1 and copies that pattern to a floating point register. Then it loads a floating point register with an IEEE 1.0 and moves that pattern to a general purpose register.

## Move data between the coprocessor and the CPU

        .text
        .globl main

main:   
        li      $t0,1           # $t0 <-- 1
                                # (move to the coprocessor)
        mtc1    $t0,$f0         # $f0 <-- $t0 
        
        li.s    $f1,1.0         # $f1 <-- 1.0
                                # (move from the coprocessor)
        mfc1    $t1,$f1         # $t1 <-- $f1 
        
        li      $v0,10          # exit
        syscall

Here is what the SPIM registers contain after running the program: