Support forums

Architectures and Processors forum UXTB only Thumb2?

State Accepted Answer
+1 person also asked this people also asked this
Locked Locked
Replies 4 replies
Subscribers 350 subscribers
Views 5489 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

UXTB only Thumb2?

Samar Samar over 12 years ago

Note: This was originally posted on 12th February 2009 at http://forums.arm.com

Hi All,

Arm9 crashed on UXTB instruction because it is not able to decode it. It caused Undef-Instruction exception.

I have been trying to find if UXTB which is a Thumb2 instruction (only supported on ARMv7 onwards) is also supported by Thumb. In other words can I actually use UXTB instruction on Arm9 (ARMv5)?

Thanks a lot,
Samar

Top replies

Peter Harris over 12 years ago +1 verified

Note: This was originally posted on 12th February 2009 at http://forums.arm.com UXTB was added in ARMv6 for both ARM and Thumb. It is also in Thumb2, as Thumb2 is a superset of the original Thumb instruction...