1.27.0[][src]Function core::arch::x86_64::_mm_mpsadbw_epu8

pub unsafe fn _mm_mpsadbw_epu8(a: __m128i, b: __m128i, imm8: i32) -> __m128i
This is supported on x86-64 and target feature sse4.1 only.

Subtracts 8-bit unsigned integer values and computes the absolute values of the differences to the corresponding bits in the destination. Then sums of the absolute differences are returned according to the bit fields in the immediate operand.

The following algorithm is performed:

This example is not tested
i = imm8[2] * 4
j = imm8[1:0] * 4
for k := 0 to 7
    d0 = abs(a[i + k + 0] - b[j + 0])
    d1 = abs(a[i + k + 1] - b[j + 1])
    d2 = abs(a[i + k + 2] - b[j + 2])
    d3 = abs(a[i + k + 3] - b[j + 3])
    r[k] = d0 + d1 + d2 + d3
Run

Arguments:

Returns:

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