On Dec 20, 10:49 am, Cactus <rieman...@googlemail.com> wrote:
> On Dec 20, 3:56 am, "Bill Hart" <goodwillh...@googlemail.com> wrote:
Following up my earlier results, I have now played with alignment and
jump decisions and I find that:
jc .1
jmp .2
align 16
.1:mov rax, [r10+r8*8]
in which there is a jump to aligned code (rather than falling through
and hence executing the padding code) gives significantly better
results:
Jason's Code (mp_add_n and mp_sub_n):
Jason's Code (mp_addmul_n and mp_submul_n):
Jason's Code (mp_mul_1):
Running benchmarks
Category base
Program multiply
multiply 128 128
MPIRbench.base.multiply.128.128 result: 26701842
multiply 512 512
MPIRbench.base.multiply.512.512 result: 6455010
multiply 8192 8192
MPIRbench.base.multiply.8192.8192 result: 61537
multiply 131072 131072
MPIRbench.base.multiply.131072.131072 result: 938
multiply 2097152 2097152
MPIRbench.base.multiply.2097152.2097152 result: 23.0
MPIRbench.base.multiply result: 46978.70
Program divide
divide 8192 32
MPIRbench.base.divide.8192.32 result: 677900
divide 8192 64
MPIRbench.base.divide.8192.64 result: 689331
divide 8192 128
MPIRbench.base.divide.8192.128 result: 269308
divide 8192 4096
MPIRbench.base.divide.8192.4096 result: 116612
divide 8192 8064
MPIRbench.base.divide.8192.8064 result: 1027764
divide 131072 8192
MPIRbench.base.divide.131072.8192 result: 2667
divide 131072 65536
MPIRbench.base.divide.131072.65536 result: 1249
divide 8388608 4194304
MPIRbench.base.divide.8388608.4194304 result: 2.56
MPIRbench.base.divide result: 24471.64
MPIRbench.base result 33906.43
Category app
Program rsa
rsa 512
MPIRbench.app.rsa.512 result: 14055
rsa 1024
MPIRbench.app.rsa.1024 result: 2735
rsa 2048
MPIRbench.app.rsa.2048 result: 498
MPIRbench.app.rsa result: 2675.09
MPIRbench.app result 2675.09
MPIRbench result: 9523.81
This is about 8% faster than my original Windows code.
Well done Jason!
Brian
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