On 01/20/2010 10:15 PM, John Regehr wrote:
Hi folks-
Just wanted to let you know that perhaps the function
helper_neon_rshl_s8() is being miscompiled by the latest gcc.
I'm using qemu 0.12.2 and gcc rev 156103, which is a pre-version of gcc
4.5. This is on an x86 machine running Ubuntu 9.10.
At -O2 or higher this is the resulting object code:
00002060 <helper_neon_rshl_s8>:
2060: 31 c0 xor %eax,%eax
2062: c3 ret
If this is not the intended result, then either the function has a
latent bug or else the compiler is doing something bad.
Confirmed. The compiler is at fault.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42833
r~
