Assembler Language Reference

sld (Shift Left Double Word) Instruction

Purpose

Shift the contents of a general purpose register left by the number of bits specified by the contents of another general purpose register.

Syntax

Bits	Value
0-5	31
6-10	S
11-15	A
16-20	B
21-30	27
31	Rc

POWER family
sld	RA, RS, RB (OE=0 Rc=0)
sld.	RA, RS, RB (OE=0 Rc=1)

Description

The contents of general purpose register (GPR) RS are shifted left the number of bits specified by the low-order seven bits of GPR RB. Bits shifted out of position 0 are lost. Zeros are supplied to the vacated positions on the right. The result is placed into GPR RA. Shift amounts from 64 to 127 give a zero result.

Other registers altered:

Condition Register (CR0 field):
Affected: LT, GT, EQ, SO (if Rc = 1)

Parameters

RA	Specifies target general-purpose register for the result of the operation.
RS	Specifies source general-purpose register containing the operand for thr shift operation.
RB	The low-order seven bits specify the distance to shift the operand.

Implementation

This instruction is defined only for 64-bit implementations. Using it on a 32-bit implementation will cause the system illegal instruction error handler to be invoked.