[Freemint-discuss] Purpose of saving sr in context.S

[Miro K. <mir...@gm...>]

Hi,

while looking into context.S I have noticed an odd couple of lines. These
were added in https://github.com/freemint/freemint/commit/de7af1b3 and I
can't understand their meaning, take save_context for instance:

- sr is obviously destroyed by the tst.w just before move.w sr,d1 so why
bother saving it?

- sr is obviously destroyed after move.w d1,sr by tst.w _fpu and all the
following lines up to move.w sr,C_SR(a0) so again, why bother at that
specific place?

- Why only save_context and change_context but no build_context and
restore_context? There's literally the same code in there.

To me it looks like a random addition with no particular purpose.

-- 
http://mikro.atari.org