Freescale Semiconductor MC68881 - Page 208

4
FBcc
15 14 13 12 11 10 9 8 7 6 5 4 3 2 I
, l, I, t, i coP,OCESSO,,D Io I' I ~'zEI COND,T,DNA,.,'RED,~T~
16-BIT DISPLACEMENT, OR MOST SIGNIFICANT WORD OF 32-BIT DISPLACEMENT
LEAST SIGNIFICANT WORD OF 32-BIT DISPLACEMENT (IF NEEDED}
Size Field -- Specifies the size of the twos-complement displacement:
Size=0 -- Displacement is 16-bits (and is sign extended before it is used).
Size = 1 -- Displacement is 32-bits.
5 4 3 2 1 0
EFFECTIVE t ADDRESS
MODE | REGISTER
FSAVE
15 14 13 12 11 10 9 8 7 6
FRESTORE
15 14 13 12 11 10 9 8 7 6
1' I 1 1 COPROCESSORID 1 I I 10 1
5 4 3 2 1 [:
EFFEDTIV~ ADDRESS
MODE | REGISTER
FREESCALE
4-150
MC68881/MC68882 USER'S MANUAL