# Code table 5.7 - Precision of floating-point numbers
0 0 Reserved 
1 1 IEEE 32-bit (I=4 in section 7) 
2 2 IEEE 64-bit (I=8 in section 7) 
3 3 IEEE 128-bit (I=16 in section 7) 
# 4-254 Reserved 
255 255 Missing