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Cmp [%ir],%r cmp [%ir]+,%r – Epson S1C63000 User Manual

Page 92

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86

EPSON

S1C63000 CORE CPU MANUAL

CHAPTER 4: INSTRUCTION SET

CMP [%ir],%r

CMP [%ir]+,%r

Compare location [ir reg.] with r reg. and increment ir reg.

1 cycle

Function:

[ir] - r, ir

ir + 1

Subtracts the content of the r register (A or B) from the content of the data memory addressed
by the ir register (X or Y). It changes the flags (Z and C), but does not change the content of the
memory. Then increments the ir register (X or Y). The increment result of the ir register does
not affect the flags.

Code:

Mnemonic

MSB

LSB

CMP [%X]+,%A

1

1

1

1

0

0

1

1

0

1

0

0

1

1E69H

CMP [%X]+,%B

1

1

1

1

0

0

1

1

0

1

1

0

1

1E6DH

CMP [%Y]+,%A

1

1

1

1

0

0

1

1

0

1

0

1

1

1E6BH

CMP [%Y]+,%B

1

1

1

1

0

0

1

1

0

1

1

1

1

1E6FH

Flags:

E

I

C

Z

Mode:

Src: Register direct
Dst: Register indirect
Extended addressing: Invalid

Compare location [ir reg.] with r reg.

1 cycle

Function:

[ir] - r
Subtracts the content of the r register (A or B) from the content of the data memory addressed
by the ir register (X or Y). It changes the flags (Z and C), but does not change the content of the
memory.

Code:

Mnemonic

MSB

LSB

CMP [%X],%A

1

1

1

1

0

0

1

1

0

1

0

0

0

1E68H

CMP [%X],%B

1

1

1

1

0

0

1

1

0

1

1

0

0

1E6CH

CMP [%Y],%A

1

1

1

1

0

0

1

1

0

1

0

1

0

1E6AH

CMP [%Y],%B

1

1

1

1

0

0

1

1

0

1

1

1

0

1E6EH

Flags:

E

I

C

Z

Mode:

Src: Register direct
Dst: Register indirect
Extended addressing: Valid

Extended

LDB

%EXT,imm8

operation:

CMP [%X],%r

[00imm8] - r (00imm8 = 0000H + 00H to FFH)

LDB

%EXT,imm8

CMP [%Y],%r

[FFimm8] - r (FFimm8 = FF00H + 00H to FFH)