On Tue, Aug 27, 2024 at 10:26:53PM +0800, Xi Ruoyao wrote: > > And then use addi.w here with the integer literals instead? > > LoongArch addi.w can only handle 12-bit signed immediate values (such a > limitation is very common in RISC machines). On my processor I can > avoid using a register to materialize the constant with addu16i.d + > addu12i.w + addi.w. But there would be 3 instructions, and addu12i.w is > a part of the Loongson Binary Translation extension which is not > available on some processors. Also LBT isn't intended for general use, > so most LBT instructions have a lower throughput than the basic > instructions. Very interesting, thanks for the explanation. Jason
