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unicorn/qemu/target/i386
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Emilio G. Cota 2d16da435e
target/i386: optimize indirect branches 
Speed up indirect branches by jumping to the target if it is valid.

Softmmu measurements (see later commit for user-mode numbers):

Note: baseline (i.e. speedup == 1x) is QEMU v2.9.0.

- SPECint06 (test set), x86_64-softmmu (Ubuntu 16.04 guest). Host: Intel i7-4790K @ 4.00GHz

2.4x +-+--------------------------------------------------------------------------------------------------------------+-+
| |
| cross |
2.2x +cross+jr..........................................................................+++...........................+-+
| | |
| +++ | |
2x +-+..............................................................................|..|............................+-+
| | | |
| | | |
1.8x +-+..............................................................................|####...........................+-+
| |# |# |
| **** |# |
1.6x +-+............................................................................*.|*.|#...........................+-+
| * |* |# |
| * |* |# |
1.4x +-+.......................................................................+++..*.|*.|#...........................+-+
| ++++++ #### * |*++# +++ |
| +++ | | #++# *++* # +++ | |
1.2x +-+......................###.....####....+++............|..|...........****..#.*..*..#....####...|.###.....####..+-+
| +++ **** # **** # #### ***### *++* # * * # #++# ****|# +++#++# |
| ****### +++ *++* # *++* # ++# # #### *|* |# +++ * * # * * # *** # *| *|# **** # |
1x +-++-*++*++#++***###++*++*+#++*+-*++#+****++#++***++#+-*+*++#-+****##++*++*-+#+*++*-+#++*+*++#++*-+*+#++*++*++#-++-+
| * * # * * # * * # * * # * * # * * # *|* |# *++* # * * # * * # * * # * * # * * # |
| * * # * * # * * # * * # * * # * * # *+*++# * * # * * # * * # * * # * * # * * # |
0.8x +-+--****###--***###--****##--****###-****###--***###--***###--****##--****###-****###--***###--****##--****###--+-+
astar bzip2 gcc gobmk h264ref hmmlibquantum mcf omnetpperlbench sjengxalancbmk hmean
png: http://imgur.com/DU36YFU

NB. 'cross' represents the previous commit.

Backports commit b4aa297781ceddef79deb0e99da7817551fa89f8 from qemu
2018-03-03 14:10:14 -05:00
..
arch_memory_mapping.c Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
bpt_helper.c Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
cc_helper.c Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
cc_helper_template.h Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
cpu-qom.h Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
cpu.c i386: Don't override -cpu options on -cpu host/max 2018-03-02 14:22:45 -05:00
cpu.h i386: Don't override -cpu options on -cpu host/max 2018-03-02 14:22:45 -05:00
excp_helper.c Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
fpu_helper.c Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
helper.c Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
helper.h Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
int_helper.c Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
Makefile.objs Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
mem_helper.c Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
misc_helper.c Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
mpx_helper.c Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
ops_sse.h Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
ops_sse_header.h Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
seg_helper.c target-i386: defer VMEXIT to do_interrupt 2018-03-02 12:49:18 -05:00
shift_helper_template.h Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
smm_helper.c Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
svm.h Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
svm_helper.c target-i386: defer VMEXIT to do_interrupt 2018-03-02 12:49:18 -05:00
TODO Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
topology.h Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
translate.c target/i386: optimize indirect branches 2018-03-03 14:10:14 -05:00
unicorn.c Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00
unicorn.h Move target-* CPU file into a target/ folder 2018-03-01 22:50:58 -05:00