[PATCH] Disable use of FMA instructions in branred

Andreas Schwab schwab@linux-m68k.org
Sat Mar 17 08:25:00 GMT 2012


David Miller <davem@davemloft.net> writes:

> I personally find this change highly suspect, especially because we
> specifically have a multi-arch variant on x86-64 to build this file
> with FMA4 enabled.

That has obviously never been properly tested.

> I suspect we actually have either GCC bug or an unreasonable
> assumption in the brandred.c code.

It is just the same bug as the use of libc_feholdexcept_setround_53bit.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."



More information about the Libc-alpha mailing list