Matthew Knepley <[email protected]> writes: > On Tue, Apr 4, 2017 at 3:40 PM, Filippo Leonardi <[email protected]> > wrote: > >> I had weird issues where gcc (that I am using for my tests right now) >> wasn't vectorising properly (even enabling all flags, from tree-vectorize, >> to mavx). According to my tests, I know the Intel compiler was a bit better >> at that. >> > > We are definitely at the mercy of the compiler for this. Maybe Jed has an > idea why its not vectorizing.
Is this so bad? 000000000024080e <VecMAXPY_Seq+0x2fe> mov rax,QWORD PTR [rbp-0xb0] 0000000000240815 <VecMAXPY_Seq+0x305> add ebx,0x1 0000000000240818 <VecMAXPY_Seq+0x308> vmulpd ymm0,ymm7,YMMWORD PTR [rax+r9*1] 000000000024081e <VecMAXPY_Seq+0x30e> mov rax,QWORD PTR [rbp-0xa8] 0000000000240825 <VecMAXPY_Seq+0x315> vfmadd231pd ymm0,ymm8,YMMWORD PTR [rax+r9*1] 000000000024082b <VecMAXPY_Seq+0x31b> mov rax,QWORD PTR [rbp-0xb8] 0000000000240832 <VecMAXPY_Seq+0x322> vfmadd231pd ymm0,ymm6,YMMWORD PTR [rax+r9*1] 0000000000240838 <VecMAXPY_Seq+0x328> vfmadd231pd ymm0,ymm5,YMMWORD PTR [r10+r9*1] 000000000024083e <VecMAXPY_Seq+0x32e> vaddpd ymm0,ymm0,YMMWORD PTR [r11+r9*1] 0000000000240844 <VecMAXPY_Seq+0x334> vmovapd YMMWORD PTR [r11+r9*1],ymm0 000000000024084a <VecMAXPY_Seq+0x33a> add r9,0x20 000000000024084e <VecMAXPY_Seq+0x33e> cmp DWORD PTR [rbp-0xa0],ebx 0000000000240854 <VecMAXPY_Seq+0x344> ja 000000000024080e <VecMAXPY_Seq+0x2fe>
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