>>653
また分割しちゃったらマクロフィユージョンで統合した意味なくないか？

>>646のExampleのところにこう書かれてるね
Sandy Bridge microarchitecture enables more arithmetic and logic instructions
to macro-fuse with conditional branches.
In loops where the ALU ports are already congested,
performing one of these macrofusions can relieve the pressure,
as the macro-fused instruction consumes only port 5, instead of an ALU
port plus port 5.