A64F_EXSH         237 lj_asm_arm64.h 	return A64F_M(m) | A64F_EXSH(A64EX_SXTW, shift);
A64F_EXSH         707 lj_asm_arm64.h   emit_dnm(as, A64I_ADDx | A64F_EXSH(A64EX_UXTW, 3), dest, base, idx);