[SeaBIOS] [PATCHv3 0/2] Emulate "leal" instruction to workaround x86emu bugs

Kevin O'Connor kevin at koconnor.net
Sat Apr 11 20:07:46 CEST 2015

On Sat, Apr 11, 2015 at 08:28:06PM +0300, Michael Tokarev wrote:
> 11.04.2015 18:08, Kevin O'Connor wrote:
> > With a few additional checks it's possible to emulate all the leal
> > cases without requiring a function call.  Although this makes the
> > vgafixup.py code a little more complex it eliminates the need for the
> > "emulate_leal" function and it produces better code.  In my tests,
> > almost all "leal" instructions are replaced with 4 (or fewer)
> > instructions.
> Maybe it is possible to tell gcc to not produce this instruction
> in the first place?

That would certainly be better.  Any idea how to do that?


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