> On Jul 5, 2018, at 12:48 PM, Richard Henderson <richard.hender...@linaro.org> > wrote: > > On 07/05/2018 09:31 AM, Programmingkid wrote: >>> On Jul 3, 2018, at 11:17 AM, Richard Henderson >>> <richard.hender...@linaro.org> wrote: >>> >>> Memory operations have no side effects on fp state. >>> The use of a "real" conversions between float64 and float32 >>> would raise exceptions for SNaN and out-of-range inputs. >> >> Would you have any documentation that tells us about converting >> between 64 bit and 32 bit floating points? > > Spelled out right at the beginning of sections 4.6 (load) and 4.7 (store) of > Book 1 of the Power ISA manual (version 3.0B) [0]. > > I've double-checked vs RISU[1] testing of LFS and STFS, with master traces > generated on Power 8 ppc64le, so I don't see anything immediately wrong with > the patch. But I haven't had time to look further than that. > > > r~ > > > [0] https://openpowerfoundation.org/?resource_lib=power-isa-version-3-0 > [1] https://git.linaro.org/people/peter.maydell/risu.git
Thank you for the documentation. My guess is there are differences between the PowerPC and Power 8 implementations. PowerPC is big endian. Would you be able to do your testing again with your Power 8 CPU in big endian mode?
