[fedora-arm] Thumb2 versus Thumb

Andrew Haley aph at redhat.com
Mon Apr 16 08:17:32 UTC 2012


On 04/15/2012 07:01 PM, Steve McIntyre wrote:
> On Sun, Apr 15, 2012 at 11:42:41AM +0100, Andrew Haley wrote:
>> Does anyone here know the difference between Thumb2 and Thumb?  I could
>> extract it from the ISA docs, but I wondered if there was a summary
>> somewhere.
> 
> At the core: Thumb is all 16-bit, Thumb2 is a mix of 16- and 32-bit
> instructions to allow for more features.

Sure, I get that, but I've never seen a sid-by-side list of the
instructions and their formats.  Sure, I could extract it from the ISA
manual.

Andrew.


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