XFEATURE_MPX
if ((xsave_mask & XFEATURE_MPX) != XFEATURE_MPX)
xsave_mask &= ~XFEATURE_MPX;
(XFEATURE_AVX | XFEATURE_MPX | XFEATURE_AVX512);
if ((xsave_mask & XFEATURE_MPX) != XFEATURE_MPX)
xsave_mask &= ~XFEATURE_MPX;