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Re:GodBolt: Enter C, get Assembly by user2994cb on Thursday December 15, 2016 @05:35PM (#13189263)
Harder to vectorize 64-bit arithmetic?
Re:GodBolt: Enter C, get Assembly by CorvusCrypto on Thursday December 15, 2016 @05:52PM (#13189406)
was going to say this. It probably only does SSE and not SSE2. Therefore vectorization only happens for 32 bit ints.
Re:GodBolt: Enter C, get Assembly by user2994cb on Friday December 16, 2016 @03:00AM (#13191789)
Seems to need -mavx2 to really go to town with 64 bit: https://godbolt.org/g/6EFYeY
Re:GodBolt: Enter C, get Assembly by jdcarter on Friday December 16, 2016 @03:31PM (#13196497)
Thank you both, I appreciate the insight!