Uploaded October 2012 | Updated September 2026, 2 weeks ago
Today we'll look at three instructions, MOVMSKPS, MOVMSKPD and PMOVMSKB. They move the signs of elements in SSE registers into an x86 register. They are especially useful after the SIMD comparison instructions.
I made an error at the end, the final example's first move should be MOVAPS instead of MOVUPS and the data should be aligned to 16 bytes.
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Example at the end is from:
stackoverflow.com/questions/116485/fastest-way-to-see-how-many-bytes-are-equal-between-fixed-length-arrays
Today we'll look at three instructions, MOVMSKPS, MOVMSKPD and PMOVMSKB. They move the signs of elements in SSE registers into an x86 register. They are especially useful after the SIMD comparison instructions.
I made an error at the end, the final example's first move should be MOVAPS instead of MOVUPS and the data should be aligned to 16 bytes.
Support What's a Creel? on Patreon:
patreon.com/whatsacreel
FaceBook:
facebook.com/whatsacreel
Music Channel:
youtube.com/channel/UC2nWRGqPL6O-Lm8mexWhISQ
Another channel with random things:
youtube.com/channel/UCK7bPumWNzWRnb3N8LCzKsA
Example at the end is from:
stackoverflow.com/questions/116485/fastest-way-to-see-how-many-bytes-are-equal-between-fixed-length-arrays
