Fujitsu FR Family Instruction Manual page 256

CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
Example: COPLD #15, #4, R8, CR1
16-bit data is transferred through the bus to the coprocessor indicated by channel number 15. Next,
the contents of general-purpose register "R8" are transferred through the bus to that coprocessor.
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 7.117-1
will have the following effect on coprocessor operation.
Table 7.117-1 Conditions for Coprocessor Command "CC" (COPLD)
232
MSB
0 0 0 0
CC Calculation
Addition CRi + CRj → CRi
00
Subtraction CRi – CRj → CRi
01
Multiplication CRi × CRj → CRi
02
Division CRi ÷ CRj → CRi
03
Other No calculation
(CPU register)
R8
3 F 8 0 0 0 0 0
(Coprocessor register)
CR1 x x x x x x x x
Before execution
0 1 0 0 1 0
LSB
0 0 0 0 0 1
(CPU register)
R8
3 F 8 0 0 0 0 0
(Coprocessor register)
CR1 3 F 8 0 0 0 0 0
After execution