Support forums

Architectures and Processors forum Why an integer be subtracted from a bitstring mean PC-2 in arm pseudocode ？

State Not Answered
Locked Locked
Replies 0 replies
Subscribers 349 subscribers
Views 951 views
Users 0 members are here

Options

How was your experience today?

This discussion has been locked.

You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Why an integer be subtracted from a bitstring mean PC-2 in arm pseudocode ？

zhiyaluo over 3 years ago

Hi,

Where:

DDI0487G_b_armv8_arm.pdf

Appendix K14 Arm Pseudocode Definition

K14.4.4 Arithmetic operators

Addition and subtraction

Page:8584

There are two cases where the types of x and y can be different. A bitstring and an integer can be added together to allow the operation PC + 4. An integer can be subtracted from a bitstring to allow the operation PC - 2.

Why subtraction mean PC-2？

Thanks