UPD30181 Datasheet, PDF (39/444 Pages) NEC – 64-/32-Bit Microprocessor

CHAPTER 1 INTRODUCTION
(2) MIPS16 instructions
All the CPU instructions except for JAL and JALX are 16-bit length when executing MIPS16 instructions, and
they are classified into thirteen instruction formats as shown in Figure 1-5.
Figure 1-5. CPU Instruction Formats (16-Bit Length Instruction)
15
I-type
15
RI-type
15
RR-type
15
RRI-type
15
RRR-type
15
RRI-A-type
15
Shift-type
15
I8-type
15
I8_MOVR32-type
15
I8_MOV32R-type
15
I64-type
15
RI64-type
op
op
op
RRI
RRR
RRI-A
SHIFT
I8
I8
I8
I64
I64
11 10
0
immediate
11 10
87
0
rx
immediate
11 10
87
54
0
rx
ry
funct
11 10
87
54
0
rx
ry
immediate
11 10
87
54
21 0
rx
ry
rz
F
11 10
rx
87
5
ry
43
0
F immediate
11 10
rx
87
54
21 0
ry
Shamt
F
11 10
87
0
funct
immediate
11 10
87
54
0
funct
ry
r32(4:0)
11 10
87
54 32
0
funct
r32(2:0) r32(4:3) rz
11 10
87
0
funct
immediate
11 10
87
54
0
funct
ry
immediate
31
Immediate(15:0)
JAL/JALX-type
16 15
11 10 9
54
0
JAL
X Immediate(20:16) Immediate(25:21)
User’s Manual U14272EJ3V0UM
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