JitArm64_Integer: cmpl - Subtract 12-bit constant

You can encode a 12-bit immediate in a SUB instruction on ARM64. We can
exploit this to avoid materializing the immediate.

This approach saves an instruction if it does not need to be
materialized in a register afterwards. Otherwise, we just materialize
it later and the total number of instructions stays the same.

Before:
0x5280003a   mov    w26, #0x1                 ; =1
0xcb1a033b   sub    x27, x25, x26

After:
0xd100073b   sub    x27, x25, #0x1

0 files changed, 0 insertions, 0 deletions