On Sun, 2022-01-23 at 16:39 +0800, 程璐璐 wrote:
>
> 在 2022/1/22 下午4:42, Xi Ruoyao 写道:
>
>
> > On Sat, 2022-01-22 at 15:55 +0800, Chenghua Xu wrote:
> >
> >
> > > +mstrict-align
> > > +Target Var(TARGET_STRICT_ALIGN) Init(0)
> > > +Do not generate unaligned memory accesses.
> > Section 2.1.8 of LoongArch spec says "load/store instruction *may* be
> > implemented to allow unaligned memory access". As it's not a "must",
> > should we really enable this by default?
> Currently, our main architecture supports this feature. Later, in the compiler
> the value of this macro will be set according to the architecture.
My suggestion is to make -mstrict-align default for the default
('-march=loongarch64'), as it should generate code working on every
architecture following the spec. And, -mno-strict-align should be the
default of -march=la464, which is the current main architecture
supporting unaligned access.
--
Xi Ruoyao <xry...@mengyan1223.wang>
School of Aerospace Science and Technology, Xidian University
