Instruction List (12)

S1C63000 Core CPU

Classification

8/16-bit transfer and operation

Mnemonic

Opcode

Operand

LDB

%BA,imm8

 

%BA,[%X]+

 

%BA,[%Y]+

LDB

%XL,%BA

 

%XL,imm8

 

%XH,%BA

LDB

%YL,%BA

 

%YL,imm8

 

%YH,%BA

LDB

%EXT,%BA

 

%EXT,imm8

Basic function

BA ← imm8 A ← [X], B ← [X+1], X ← X+2 A ← [Y], B ← [Y+1], Y ← Y+2 XL ← BA XL ← imm8 XH ← BA YL ← BA YL ← imm8 YH ← BA EXT ← BA EXT ← imm8

Extended function

Clk

 

Flags

 

Symbol

(when "LDB %EXT, imm8" is executed)

E

I

C

Z

 

 

–

1

0

–

–

–

●,@h

–

2

0

–

–

–

–

–

2

0

–

–

–

–

–

1

0

–

–

–

–

X ← imm16 (imm8 set in EXT is used as high-order 8 bits)

1

0

–

–

–

●,@l

–

1

0

–

–

–

–

–

1

0

–

–

–

–

Y ← imm16 (imm8 set in EXT is used as high-order 8 bits)

1

0

–

–

–

●,@l

–

1

0

–

–

–

–

–

1

1

–

–

–

–

–

1

1

–

–

–

●,@l,@h

 

 

 

 

 

 

@rh,@xh

 

LDB

%SP1,%BA

 

 

%SP2,%BA

 

LDB

[%X]+,%BA

 

 

[%X]+,imm8

 

LDB

[%Y]+,%BA

 

ADD

%X,%BA

 

 

%X,sign8

 

 

%Y,%BA

 

 

%Y,sign8

 

CMP

%X,imm8

 

 

%Y,imm8

 

INC

%SP1

 

 

%SP2

 

DEC

%SP1

 

 

%SP2

Stack

PUSH

%A

operation

 

%B

 

 

%F

 

 

%X

 

 

%Y

 

POP

%A

 

 

%B

 

 

%F

 

 

%X

 

 

%Y

SP1 ← BA SP2 ← BA [X] ← A, [X+1] ← B, X ← X+2

[X]← i3~0, [X+1] ← i7~4, X ← X+2

[Y]← A, [Y+1] ← B, Y ← Y+2

X ← X+BA X ← X+sign8 (sign8=-128~127) Y ← Y+BA Y ← Y+sign8 (sign8=-128~127)X-imm8 (imm8=0~255) Y-imm8 (imm8=0~255) SP1 ← SP1+1 SP2 ← SP2+1 SP1 ← SP1-1 SP2 ← SP2-1[SP2-1]← A, SP2 ← SP2-1[SP2-1]← B, SP2 ← SP2-1[SP2-1]← F, SP2 ← SP2-1([(SP1-1)∗4+3]~[(SP1-1)∗4]) ← X, SP1 ← SP1-1 ([(SP1-1)∗4+3]~[(SP1-1)∗4]) ← Y, SP1 ← SP1-1 A ← [SP2], SP2 ← SP2+1 B ← [SP2], SP2 ← SP2+1 F ← [SP2], SP2 ← SP2+1 X ← ([SP1∗4+3]~[SP1∗4]), SP1 ← SP1+1 Y ← ([SP1∗4+3]~[SP1∗4]), SP1 ← SP1+1

–

1

0

–

–

–

–

–

1

0

–

–

–

–

–

2

0

–

–

–

–

–

2

0

–

–

–

●,@l,@h

–

2

0

–

–

–

–

–

1

0

–

–

↔

–

X ← X+imm16 (imm8 set in EXT is used as high-order 8 bits)

1

0

–

–

↔

●,@l

–

1

0

–

–

↔

–

Y ← Y+imm16 (imm8 set in EXT is used as high-order 8 bits)

1

0

–

–

↔

●,@l

X-imm16 (imm8 set in EXT is used as high-order 8 bits)

1

0

–

↔ ↔

●,@l

Y-imm16 (imm8 set in EXT is used as high-order 8 bits)

1

0

–

↔ ↔

●,@l

–

1

0

–

–

↔

–

–

1

0

–

–

↔

–

–

1

0

–

–

↔

–

–

1

0

–

–

–

–

–

1

0

–

–

–

–

–

1

0

–

–

–

–

–

1

0

–

–

–

–

–

1

0

–

–

–

–

–

1

0

–

–

–

–

–

1

0

–

–

–

–

–

1

0

–

–

–

–

–

1

↔ ↔ ↔ ↔

–

–

1

0

–

–

–

–

–

1

0

–

–

–

–

Remarks