GitLab

Detail:
  Initial VFP/NEON support code for RISC OS. Features:
  * Basic detection code for determining VFP version. Should work OK on all architecture versions.
  * Provides code to perform VFP/NEON context switches
  * Context switches can be lazy or immediate
  * Context register dumps can be stored in user-allocated memory or memory allocated by VFPSupport
  * Basic APIs for examining contexts and reporting available hardware features
  * "FastAPI" that privileged code can use for context switching in order to avoid SWI call overheads
  Missing/unfinished features:
  * No VFP exception handler is present, so the module will refuse to run on anything but a VFPv3 system
  * Lazy context switching is simplistic, opting to activate the new context upon the first undefined instruction abort instead of checking to see if it was a VFP instruction that triggered the abort
  * No interface to allow debuggers to easily get their hands on a register dump following a crash...