It is super weird to me that PHMINPOSUW only exists in 128-bit regs. Since AVX/AVX2 pretend 256-bit regs are 2 128-bit regs, I would have assumed that all 128-bit ops would be in there for 256-bit registers as just two copies of the 128-bit op, but I guess not??
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Nope not really. My best guess is something with windows programming and memory :) I’m not allowed to Google.
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I would go for CPU intrinsics.
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