bpu: fix SC update sum

[eastonman]

No description provided.

[XiangShanRobot]

[Generated by IPC robot]
commit: e41b1be

commit	astar	copy_and_run	coremark	gcc	gromacs	lbm	linux	mcf	microbench	milc	namd	povray	wrf	xalancbmk
e41b1be	1.780	0.458	2.016	1.183	2.933	2.498	2.207	0.925	1.366	1.441	3.156	2.606	2.385	2.956

master branch:

commit	astar	copy_and_run	coremark	gcc	gromacs	lbm	linux	mcf	microbench	milc	namd	povray	wrf	xalancbmk
94d703a	1.784	0.458	2.003	1.199	2.920	2.498	2.207	0.928	1.374	1.441	3.153	2.600	2.385	2.956
47986d3	1.784	0.458	2.003	1.199	2.920	2.498	2.207	0.928	1.374	1.441	3.153	2.600	2.385	2.956
38f78b5	1.784	0.458	2.003	1.199	2.920	2.498	2.207	0.928	1.374	1.441	3.153	2.600	2.385	2.956
e6ac7fe	1.784	0.458	2.003	1.199	2.920	2.498	2.207	0.928	1.374	1.441	3.153	2.600	2.385	2.956
ec15951	1.784	0.458	2.003	1.199	2.920	2.498	2.207	0.928	1.374	1.441	3.153	2.600	2.385	2.956
dab1ad8	1.784	0.458	2.003	1.199	2.920	2.498	2.207	0.928	1.374	1.441	3.153	2.600	2.385	2.956
c6655c9	1.784	0.458	2.003	1.199	2.920	2.498	2.207	0.928	1.374	1.441	3.153	2.600	2.385	2.956
340ef6e	1.784	0.458	2.003	1.199	2.920	2.498	2.207	0.928	1.374	1.441	3.153	2.600	2.385	2.956
571677c	1.784	0.458	2.003	1.199	2.920	2.498	2.207	0.928	1.374	1.441	3.153	2.600	2.385	2.956
6bb8be2	1.784	0.458	2.003	1.199	2.920	2.498	2.197	0.927	1.374	1.441	3.153	2.600	2.385	2.956

[eastonman]

Observed some B-type branch mispredict reduction.

New:

astar.log         [PERF ][time=             2808984] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                17688
copy_and_run.log  [PERF ][time=              888093] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                 5939
coremark.log      [PERF ][time=             1560556] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                28258
gcc.log           [PERF ][time=             4228224] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                 5618
gromacs.log       [PERF ][time=             1704837] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                 2750
lbm.log           [PERF ][time=             2001473] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                  207
linux.log         [PERF ][time=             6584053] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                34124
mcf.log           [PERF ][time=             5403543] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                47516
microbench.log    [PERF ][time=              239443] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                 3391
milc.log          [PERF ][time=             3469278] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                   51
namd.log          [PERF ][time=             1584385] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                 9880
povray.log        [PERF ][time=             1918599] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                11259
wrf.log           [PERF ][time=             2096638] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                 1779
xalancbmk.log     [PERF ][time=             1691764] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                  227

Old:

astar.log         [PERF ][time=             2802178] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                17800
copy_and_run.log  [PERF ][time=              887557] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                 5854
coremark.log      [PERF ][time=             1570682] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                28564
gcc.log           [PERF ][time=             4168932] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                 5795
gromacs.log       [PERF ][time=             1712403] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                 2784
lbm.log           [PERF ][time=             2001473] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                  207
linux.log         [PERF ][time=             6582384] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                34086
mcf.log           [PERF ][time=             5387607] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                47902
microbench.log    [PERF ][time=              237951] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                 3432
milc.log          [PERF ][time=             3469278] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                   51
namd.log          [PERF ][time=             1585916] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                 9923
povray.log        [PERF ][time=             1923342] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                11280
wrf.log           [PERF ][time=             2096029] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                 1790
xalancbmk.log     [PERF ][time=             1691733] TOP.SimTop.l_soc.core_with_l2.core.frontend.ftq: BpBWrong,                  216