On Thu, Mar 13, 2014 at 6:27 PM, Michael Hudson-Doyle <michael.hud...@linaro.org> wrote: > Ian Lance Taylor <i...@google.com> writes: > >> The bug report http://golang.org/issue/7074 shows that math.Log2(1) >> produces the wrong result on Aarch64, because the Go math package is >> compiled to use a fused multiply-add instruction. This patch to the >> libgo configure script will use -ffp-contract=off when compiling the >> math package on processors other than x86. Bootstrapped and ran Go >> testsuite on x86_64-unknown-linux-gnu, not that that tests much. >> Committed to mainline. > > Thanks for this! If you are willing to go into battle enough to argue > that libgcc should also be compiled with -ffp-contract=off (I did not > have the stomach for that fight) then we'll be down to 1 check-go > failure on aarch64 (which is peano -- due to the absence of > split/copyable stacks and should probably xfail).
Hmmm, what is it that fails with libgcc? Is there a bug report for it? I agree that peano is likely to fail without split stacks. Ian
