BypassNetwork: ExuOH->ExuVec, add mask for forwardOrBypassValidVec3

[xiaofeibao-xjtu]

…or fix timing

[XiangShanRobot]

[Generated by IPC robot]
commit: 8d887dd

commit	astar	copy_and_run	coremark	gcc	gromacs	lbm	linux	mcf	microbench	milc	namd	povray	wrf	xalancbmk
8d887dd	1.801	0.452	2.040	1.187	2.936	2.508	2.197	0.930	1.378	1.441	3.428	2.669	2.399	2.932

master branch:

commit	astar	copy_and_run	coremark	gcc	gromacs	lbm	linux	mcf	microbench	milc	namd	povray	wrf	xalancbmk
69a3c27			2.052					0.930	1.377
a31db3f			2.052						1.377
5adc482	1.801	0.452	2.039	1.187	2.936	2.508	2.197	0.930	1.378	1.441	3.428	2.669	2.399	2.932
0d257fb	1.801	0.452	2.040	1.187	2.936	2.508	2.197	0.930	1.378	1.441	3.428	2.669	2.399	2.932
ba5ba1d	1.805	0.452	2.039	1.187	2.936	2.508	2.197	0.930	1.378	1.441	3.428	2.669	2.399	2.932
6613a2d	1.801	0.448	2.040	1.187	2.936	2.508	2.197	0.930	1.378	1.441	3.428	2.669	2.399	2.932
9810c04	1.805	0.448	2.040	1.187	2.936	2.508	2.197	0.930	1.378	1.441	3.428	2.669	2.399	2.932
0184a80	1.803	0.448	2.039	1.187	2.936	2.508	2.197	0.930	1.378	1.441	3.428	2.669	2.399	2.932
8fe4f15	1.805	0.448	2.039	1.187	2.936	2.508	2.197	0.930	1.378	1.441	3.428	2.669	2.399	2.932
54cc3a0	1.805	0.448	2.040	1.187	2.936	2.508	2.197	0.930	1.378	1.441	3.428	2.669	2.399	2.932