vzeroupper
Zero Upper Bits of YMM Registers
VZEROUPPER
Clears bits 128-255 of all YMM registers (Avoids AVX-SSE transition penalty).
Details
The Zero Upper Bits of YMM Registers instruction clears bits 128-255 of all YMM registers (Avoids AVX-SSE transition penalty).
Pseudocode Operation
// Clears bits 128-255 of all YMM registers (Avoids AVX-SSE transition penalty)Example
VZEROUPPER
Encoding
Binary Layout
VEX
+0
C5
+3
F8
+4
77
+5