Function core::arch::x86_64::_mm_mullo_epi32

1.27.0 · source ·
pub unsafe fn _mm_mullo_epi32(a: __m128i, b: __m128i) -> __m128i
Available on (x86 or x86-64) and target feature sse4.1 and x86-64 only.
Expand description

Multiplies the packed 32-bit integers in a and b, producing intermediate 64-bit integers, and returns the lowest 32-bit, whatever they might be, reinterpreted as a signed integer. While pmulld __m128i::splat(2), __m128i::splat(2) returns the obvious __m128i::splat(4), due to wrapping arithmetic pmulld __m128i::splat(i32::MAX), __m128i::splat(2) would return a negative number.

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