Aurelien Jarno schrieb: > On Thu, Apr 08, 2010 at 03:38:52PM +0200, Stefan Weil wrote: > >> Register fp is a bad choice for compilations without >> optimisation, because the compiler makes heavy use >> of this register (so the resulting code crashes). >> > > I don't fully understand why the compiler makes use of this register in > code where env is declared as register fp. >
fp = frame pointer is special. See Paul's answer. > >> Register s0 was used for TCG_AREG1 in earlier releases, >> but was no longer used and is now free for TCG_AREG0. >> >> The resulting code works for compilations without >> optimisation (tested with qemu mips in qemu mips >> on x86 host). >> > > The patch is not complete, at least some changes are missing to > tcg_target_callee_save_regs. > Thanks. I'll send an updated patch. Regards, Stefan
