shl | CS+ V4.01.00

shl

Logical left shift.

[Syntax]

-	shl reg1, reg2

-	shl imm5, reg2

-	shl reg1, reg2, reg3

The following can be specified for imm5:

-	Absolute expression having a value of up to 5 bits

[Function]

-	Syntax "shl reg1, reg2"

Logically shifts to the left the value of the register specified by the second operand by the number of bits indicated by the lower 5 bits of the register value specified by the first operand, then stores the result in the register specified by the second operand.

-	Syntax "shl imm5, reg2"

Logically shifts to the left the value of the register specified by the second operand by the number of bits specified by the value of the absolute expression specified by the first operand, then stores the result in the register specified by the second operand.

-	Syntax "shl reg1, reg2, reg3"

[Description]

The assembler generates one shl machine instruction.

[Flag]

CY	1 if the value of the bit shifted out last is 1, 0 if not (0 if the specified number of bits is 0)
OV	0
S	1 if the result is negative, 0 if not
Z	1 if the result is 0, 0 if not
SAT	---

[Caution]

-	If an absolute expression having a value exceeding the range of 0 to 31 is specified for imm5 in syntax "shl imm5, reg2", the assembler outputs the following message, and continues assembling by using the lower 5 bitsNote of the specified value.

W0550011 : illegal operand (range error in immediate).

Note	The shl machine instruction takes an immediate value of 0 to 31 (0x0 to 0x1F) as the first operand.