fstmdbx.
January 24th, 2002
fstmdbx. What the hell is that? The ARM compiler generated
it, but neither the ARM emulator nor the ARM Architecture Reference
Manual (yes, the “ARM ARM”) have ever heard of it.
[Update: it’s a non-core floating-point instruction. f (floating
point) st (store) m (multiply) d (double precision)
bx (condition expression).]