My results:
Thread model: posix gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) model name : Intel(R) Core(TM) i5-3317U CPU @ 1.70GHz model name : Intel(R) Core(TM) i5-3317U CPU @ 1.70GHz model name : Intel(R) Core(TM) i5-3317U CPU @ 1.70GHz model name : Intel(R) Core(TM) i5-3317U CPU @ 1.70GHz subnormal 12.0642 times slower. -ffast-math enabled subnormal 1.14059 times slower. SSE enabled FTZ=0 DAZ=0 subnormal 12.0405 times slower. SSE enabled FTZ=0 DAZ=1 subnormal 0.999144 times slower. SSE enabled FTZ=1 DAZ=0 subnormal 12.0839 times slower. SSE enabled FTZ=0 DAZ=0 -ffast-math enabled subnormal 1.00153 times slower. SSE enabled FTZ=0 DAZ=1 -ffast-math enabled subnormal 1.01593 times slower. SSE enabled FTZ=1 DAZ=0 -ffast-math enabled subnormal 1.0017 times slower.
My results:
Thread model: posix
gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1)
model name : Intel(R) Core(TM) i5-3317U CPU @ 1.70GHz
model name : Intel(R) Core(TM) i5-3317U CPU @ 1.70GHz
model name : Intel(R) Core(TM) i5-3317U CPU @ 1.70GHz
model name : Intel(R) Core(TM) i5-3317U CPU @ 1.70GHz
subnormal 12.0642 times slower.
-ffast-math enabled subnormal 1.14059 times slower.
SSE enabled FTZ=0 DAZ=0 subnormal 12.0405 times slower.
SSE enabled FTZ=0 DAZ=1 subnormal 0.999144 times slower.
SSE enabled FTZ=1 DAZ=0 subnormal 12.0839 times slower.
SSE enabled FTZ=0 DAZ=0 -ffast-math enabled subnormal 1.00153 times slower.
SSE enabled FTZ=0 DAZ=1 -ffast-math enabled subnormal 1.01593 times slower.
SSE enabled FTZ=1 DAZ=0 -ffast-math enabled subnormal 1.0017 times slower.