On 12/08/15 17:03, Doug Goldstein wrote: > On Wed, Aug 12, 2015 at 10:38 AM, Jan Beulich <jbeul...@suse.com> wrote: >>>>> On 12.08.15 at 17:23, <car...@cardoe.com> wrote: >>> From: Nathan Rossi <nathan.ro...@xilinx.com> >>> >>> * When forcing -mno-sse specify -mfpmath=387 to avoid the fallback >>> warning >> "the fallback warning" being what? I've never seen any, and I don't >> think I've ever heard anyone else say there was one. >> >> Apart from that I don't think -mfpmath=387 is what we want - we'd >> better tell the compiler to not use x87 registers at all.
Agreed. However, a git grep shows: crypto/vmac.c:1098: double cpb; crypto/vmac.c:1158: ((double)CLOCKS_PER_SEC*speed_lengths[i]*speed_iters[i])); which I suspect might need fixing. >> >> Jan >> > I guess I jumped the gun a bit. When targeting a corei7 based chip, Yocto uses > the following CFLAGS for the packages it builds: > > -march=corei7 -mtune=corei7 -mfpmath=sse -msse4.2 > > The issue is the -mfpmath value. > It seems wrong to set -mfpmath=387, as that implies that floating point maths is ok. I cant however find an obvious "no fpmath" option. Perhaps Xen should specifically filter options such as those out from the environmental CFLAGS ~Andrew _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
