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SRAX Instruction UM018809-0611

162

ZNEO

CPU Core

User Manual

SRAX

Definition

Shift Right Arithmetic, Extended

Syntax

SRAX dst, src

Operation

Description

This instruction performs an arithmetic shift to the right on the destination operand by the num-

ber of bit positions (0–31) specified in bits [4:0] of the source operand. On each bit shift iteration,

Bit 0 replaces the Carry (

C) flag. The value of Bit 31 (the Sign bit) does not change, but its value

shifts into Bit 30 on each iteration.

The source register is cleared, and bits shifted out of the destination are shifted into the source

This instruction is generated by using the Extend prefix, 0007H, with the SRA opcode.

 src

dst

src

31 0

1 2 ... 173 174 175 176 177 178 179 180 181 182 183 ... 215 216

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