Hi,
On Thu, 20 Oct 2011, Uros Bizjak wrote:
> This patch builds on recent patch by Michael (that implemented
> fine-grained control on -mrecip option) and with -ffast-math emits
> reciprocal sequences with additional NR step for vectorized SFmode
> division and vectorized sqrtf(x).
FWIW, I didn't yet come to do the same for cpu2006, but here are the two
results of polyhedron (sandybridge, with baseflags "-Ofast -funroll-loops
-fpeel-loops -march=corei7-avx -mveclibabi=svml -flto -fwhole-program",
i.e. without increasing the inline limits, and linking against libimf and
libsvml). With the above flags:
Benchmark Compile Executable Ave Run Number Estim
Name (secs) (bytes) (secs) Repeats Err %
--------- ------- ---------- ------- ------- ------
ac 4.68 4086864 6.16 2 0.0211
aermod 68.22 5603956 13.40 5 0.1864
air 10.46 4961134 3.78 5 0.2888
capacita 3.74 4213850 19.24 3 0.0998
channel 1.44 4808524 1.22 5 0.2898
doduc 12.64 4288238 19.91 5 0.1128
fatigue 4.47 4217301 3.71 5 0.0989
gas_dyn 6.92 4211997 3.43 5 2.8640
induct 7.44 4385543 10.33 5 0.2719
linpk 1.28 4053798 5.88 2 0.0647
mdbx 3.97 4114107 7.63 5 0.1365
nf 4.89 4147809 7.90 2 0.0380
protein 15.07 5049415 20.70 5 0.7615
rnflow 11.89 4260434 16.05 5 0.1359
test_fpu 8.11 4207868 3.69 5 0.6687
tfft 0.99 4110713 0.84 5 0.3024
Geometric Mean Execution Time = 6.35 seconds
With the above flags plus "-mrecip=vec-sqrt,vec-div":
Benchmark Compile Executable Ave Run Number Estim
Name (secs) (bytes) (secs) Repeats Err %
--------- ------- ---------- ------- ------- ------
ac 3.85 4086864 6.17 2 0.0227
aermod 68.31 5603956 13.38 2 0.0019
air 10.92 4961134 3.77 5 0.1367
capacita 3.71 4213850 18.68 2 0.0391
channel 1.41 4808524 1.22 5 0.3327
doduc 12.66 4288238 19.93 5 0.2391
fatigue 4.36 4217301 3.70 2 0.0567
gas_dyn 6.91 4211997 2.31 2 0.0867
induct 7.46 4385543 10.31 5 0.1201
linpk 1.70 4053798 5.88 2 0.0383
mdbx 3.98 4114107 7.68 5 0.4000
nf 4.89 4147809 7.89 2 0.0348
protein 14.00 5049415 20.51 2 0.0478
rnflow 11.89 4260434 16.05 4 0.0837
test_fpu 8.09 4207868 3.71 5 0.7097
tfft 1.13 4110713 0.83 5 0.2290
Geometric Mean Execution Time = 6.18 seconds
I.e. gas_dyn improves quite a bit (as expected), and the rest still works.
I know that cpu2006 also works, but as said have no recent measurements
for that, which I'm going to take now.
Ciao,
Michael.
