ins.as, ins.rs1 = AFSGNJS, uint32(p.From.Reg)
		case AMOVD: // MOVD Ra, Rb -> FSGNJD Ra, Ra, Rb
			ins.as, ins.rs1 = AFSGNJD, uint32(p.From.Reg)
		case AMOVB, AMOVH:
			if buildcfg.GORISCV64 >= 22 {
				// Use SEXTB or SEXTH to extend.
				ins.as, ins.rs1, ins.rs2 = ASEXTB, uint32(p.From.Reg), obj.REG_NONE
				if p.As == AMOVH {
					ins.as = ASEXTH
				}
			} else {
				// Use SLLI/SRAI sequence to extend.