New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

SP / R13 lowest bits should always be zero #17

Closed

urish opened this issue May 10, 2021 · 0 comments

Assignees

Labels

bug

Contributor

urish commented May 10, 2021

Quoting section A5.1.3 / Use of 0b1101 as a register specifier from the ARMv6-M Architecture Reference Manual:

R13<1:0> definition
Bits [1:0] of R13 are treated as Should Be Zero or Preserved (SBZP). Writing a non-zero value to bits [1:0] results
in UNPREDICTABLE behavior. Reading bits [1:0] returns zero.

urish added the bug label

urish self-assigned this

urish mentioned this issue

Many test report the wrong expect value #15

Closed

urish closed this as completed in

8c8603c

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment