SLA b,BCDE
SLA b,JKHL     Shift Left Arithmetic     Rabbit 4000 Instruction

Opcode	Instruction	Clocks	Operation
----	SLA b,BCDE	4 (2,2)	BCDE = {BCDE[30,0],0}   CF = B[7]   b = b - 1 repeat while b!=0
DD 88	SLA 1,BCDE	4 (2,2)	repeat the operation 1 time
DD 89	SLA 2,BCDE	4 (2,2)	repeat the operation 2 times
DD 8B	SLA 4,BCDE	4 (2,2)	repeat the operation 4 times
----	SLA b,JKHL	4 (2,2)	JKHL = {JKHL[30,0],0}   CF = J[7]   b = b - 1 repeat while b!=0
FD 88	SLA 1,JKHL	4 (2,2)	repeat the operation 1 time
FD 89	SLA 2,JKHL	4 (2,2)	repeat the operation 2 times
FD 8B	SLA 4,JKHL	4 (2,2)	repeat the operation 4 times

Flags				ALTD			IOI/IOE
S	Z	L/V	C	F	R	SP	S	D
·	·	L	·	·	·

Description

Arithmetically shifts to the left the bits of BCDE or JKHL. Bits 0 through 30 are each shifted to the next highest-order bit position (bit 0 moves to bit 1, etc.). Bit 31 is shifted to the C flag. Bit 0 is reset.

Figure 18: The bit logic of the SLA instruction.

The operation happens b number of times.