Function _mm_floor_pd

pub unsafe fn _mm_floor_pd(a: __m128d) -> __m128d

Available on (x86 or x86-64) and target feature sse4.1 and x86 only.

Round the packed double-precision (64-bit) floating-point elements in a down to an integer value, and stores the results as packed double-precision floating-point elements.

Intel’s documentation