Instruction Formats - Fujitsu FR Family Instruction Manual

CHAPTER 6 INSTRUCTION OVERVIEW
6.1

Instruction Formats

The FR family CPU uses six types of instruction format, TYPE-A through TYPE-F.
■ Instruction Formats
All instructions used by the FR family CPU are written in the six formats shown in Figure 6.1-1.
■ Relation between Bit Patterns "Ri" and "Rj" and Register Values
Table 6.1-1shows the relation between general-purpose register numbers and field bit pattern values.
Table 6.1-1 General-purpose Register Numbers and Field Bit Pattern Values
Ri/Rj
0000
0001
0010
0011
64
Figure 6.1-1 Instruction Formats
MSB
TYPE-A
TYPE-B
TYPE-C
TYPE-D
TYPE-E
TYPE-F
Register Ri/Rj
R0 0100
R1 0101
R2 0110
R3 0111
16bit
8bit 4bit
OP Rj
4bit 8bit
OP i8/o8
8bit 4bit
OP
u4/m4/i4
8bit
OP u8/rel8/dir/rlist
12bit
OP
5bit 11bit
OP rel11
Register Ri/Rj
R4 1000
R5 1001
R6 1010
R7 1011
LSB
4bit
Ri
4bit
Ri
4bit
Ri
8bit
4bit
Ri/Rs
Register Ri/Rj
R8 1100
R9 1101
R10 1110
R11 1111
Register
R12
R13
R14
R15