MFC1 - MIPS instruction reference

mfc1Move from FP register to integer register 
Copies the raw 32-bit bit-pattern stored in FP register $f1 into integer register $t1.
Used in Floating point and Coprocessor 1MIPS assembly
 
Forms  mfc1 ,   
Operands $t1 Any general-purpose register, $0 to $31, using its numeric or named spelling, such as $8 or $t0 ($zero is $0; $ra is $31). 
$f1 Any floating-point register, $f0 to $f31. 
Useful for reading a single-precision float's bits or the result of 'floor.w.s', 'cvt.w.s', etc.
 # Read back the initialized single value 1.0. Inspect $t0: 0x3F800000.
li $t1, 0x3F800000
mtc1 $t1, $f0
mfc1 $t0, $f0