cbe: implementing 128 bit math functions for !zig_has_int128

- Add addo_(i|u)128, subo_(i|u)128, mulo_(i|u)128,
- Move zig_shlo_(i|u)128 into common code
- Fixup zig_shls_i128 passing rhs as 128
f155ef2f4bkcbanner committed on 1/1/2023, 9:44:28 PMparentfbd3459
1 file changedLine totals unavailable