https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83308
--- Comment #14 from Oleg Endo <olegendo at gcc dot gnu.org> --- (In reply to John Paul Adrian Glaubitz from comment #13) > Cacheline size is 32 bytes according to the documentation: > > > www.st.com/resource/en/user_manual/cd00147165.pdf (page 75) Cache line sizes of original SH implementations: SH2,SH2A,SH3: 16 bytes SH4, SH4A: 32 bytes > > PC quantum should be 2 bytes as SH uses a 16-bit instruction encoding. > SH2A and SH-DSP have actually 4 byte instructions. There are also some late SH4A variants which can do 16-bit prefixes, resulting in 4 byte instructions. Other (newer) SH implementations might deviate from the originals and use multiple-length instructions or different cache line sizes. But I don't think that matters a lot. E.g. 68K has variable length instructions and GOARCH_PCQUANTUM=4. Not sure how much the cache line size is of an importance for libgo ... > No idea about GOARCH_MINFRAMESIZE though. > > Patch submitted here: > https://gcc.gnu.org/ml/gcc-patches/2017-12/msg01111.html That looks OK. On SH the minimum stack pointer alignment is 4.
