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cfee7d9cf4
This patch removes the powerpc assembly implementation of fmax/fmin.
Based on benchtests, the assembly ones shows:
$ ./testrun.sh benchtests/bench-fmax
"fmax": {
"": {
"duration": 5.07586e+09,
"iterations": 2.01676e+09,
"max": 1350.39,
"min": 2.073,
"mean": 2.51684
},
"qNaN": {
"duration": 5.09315e+09,
"iterations": 8.4568e+08,
"max": 2788,
"min": 5.806,
"mean": 6.02255
},
"sNaN": {
"duration": 5.09073e+09,
"iterations": 8.42316e+08,
"max": 4215.84,
"min": 5.737,
"mean": 6.04373
}
And
$ ./testrun.sh benchtests/bench-fmin
"fmin": {
"": {
"duration": 5.07711e+09,
"iterations": 2.02982e+09,
"max": 497.094,
"min": 2.073,
"mean": 2.50126
},
"qNaN": {
"duration": 5.09134e+09,
"iterations": 8.46968e+08,
"max": 2255.14,
"min": 5.807,
"mean": 6.01125
},
"sNaN": {
"duration": 5.09122e+09,
"iterations": 8.4746e+08,
"max": 1969.38,
"min": 5.729,
"mean": 6.00763
}
}
The default implementation (math/s_f{max.min}_template.c) shows slight better
latency for all cases:
$ ./testrun.sh benchtests/bench-fmax
"fmax": {
"": {
"duration": 5.07044e+09,
"iterations": 2.38695e+09,
"max": 2048.58,
"min": 2.073,
"mean": 2.12423
},
"qNaN": {
"duration": 5.09004e+09,
"iterations": 9.45428e+08,
"max": 3306.93,
"min": 5.138,
"mean": 5.38385
},
"sNaN": {
"duration": 5.08458e+09,
"iterations": 1.15959e+09,
"max": 972.008,
"min": 3.321,
"mean": 4.3848
}
}
And:
$ ./testrun.sh benchtests/bench-fmin
"fmin": {
"": {
"duration": 5.06817e+09,
"iterations": 2.3913e+09,
"max": 1177.9,
"min": 2.073,
"mean": 2.11942
},
"qNaN": {
"duration": 5.08857e+09,
"iterations": 9.45656e+08,
"max": 2658.83,
"min": 5.09,
"mean": 5.38099
},
"sNaN": {
"duration": 5.08093e+09,
"iterations": 1.16725e+09,
"max": 1030.74,
"min": 3.323,
"mean": 4.3529
}
}
Both were run with GCC 5.4 (ubuntu 16 default installation) using default
compiler flags on POWER8E 3.4GHz (powerpc64le-linux-gnu).
|
||
|---|---|---|
| .. | ||
| multiarch | ||
| s_ceil.S | ||
| s_ceilf.S | ||
| s_copysign.S | ||
| s_copysignf.S | ||
| s_copysignl.S | ||
| s_fabs.S | ||
| s_fabsl.S | ||
| s_floor.S | ||
| s_floorf.S | ||
| s_fma.S | ||
| s_isnan.S | ||
| s_llrint.S | ||
| s_llrintf.S | ||
| s_llround.S | ||
| s_llroundf.S | ||
| s_lrint.S | ||
| s_lround.S | ||
| s_lroundf.S | ||
| s_nearbyint.S | ||
| s_nearbyintf.S | ||
| s_rint.S | ||
| s_rintf.S | ||
| s_round.S | ||
| s_roundf.S | ||
| s_trunc.S | ||
| s_truncf.S | ||