FUJITSU FR family 32-bit microcontroller instruction manuel CM71-00101-5E - Manual (Page 254)

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CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
Example: COPOP #15, #1, CR3, CR4
16-bit data is transferred through the bus to the coprocessor indicated by channel number 15.
Assuming that the coprocessor indicated by channel 15 is a single-precision
floating-decimal calculation unit, the coprocessor command "CC" set as shown in Table 7.116-1
will have the following effect on coprocessor operation.
Table 7.116-1 Conditions for Coprocessor Command "CC" (COPOP)
CC Calculation
00 Addition CRi + CRj
→ CRi
01 Subtraction CRi – CRj
→ CRi
02 Multiplication CRi × CRj
→ CRi
03 Division CRi ÷ CRj
→ CRi
Other No operation
MSB LSB
0 0 0 0 0 0 0 1 0 0 1 1 0 1 0 0
CR3 C 0 0 0 0 0 0 0
( - 1 x 2 0 )
CR3 C 0 0 0 0 0 0 0
CR4 4 0 8 0 0 0 0 0
( 2 x 2 0 ) ( 3 x 2 0 )
CR4 4 0 C 0 0 0 0 0
(Coprocessor register) (Coprocessor register)
Before execution After execution