On Mon, 2021-09-27 at 14:42 +0800, Huacai Chen wrote: > +#define t0 $r12 /* caller saved */ > +#define t1 $r13 > +#define t2 $r14 > +#define t3 $r15 > +#define t4 $r16 > +#define t5 $r17 > +#define t6 $r18 > +#define t7 $r19 > +#define t8 $r20 > +#define x0 $r21 In the doc it's said x0 will be used to name a 256-bit vector register. Maybe it's better to rename this one?