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The original AVX instructions didn't have all the integer operations that the most modern chips have. It might have been haswell that added small integers over
by BubRoss 7y ago
The original AVX instructions didn't have all the integer operations that the most modern chips have. It might have been haswell that added small integers over the 256 bit lane width.
- stephencanon 7y agoRight. AVX (the original extension) only added 256b floating-point and non-destructive 128b integer. The 256b integer SIMD ops are all in AVX2 or later.