[PATCH] D139888: [lld][ARM] support absolute thunks for Armv4T Thumb and interworking

[Ties Stuij via Phabricator via llvm-commits]

stuij added a comment.

> NDS has a v5T and a v4T, not sure what the development story was for it, whether the software used v4T exclusively or the chips were programmed independently.

The official devkit didn't allow programmers to write for the arm7tdmi directly actually. It was mainly used to control hardware and you had to use an API to talk to it from the Arm9 (which is horrible to program for btw, as cost-saving measures meant that you can only run it at full speed when interfacing with TCM and caches). For home-brew devkits of course anything goes and you can program them both. They communicate through an interconnect FIFO. And yes, the most popular home-brew devkit is based on current GCC.


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https://reviews.llvm.org/D139888