Function no_std_compat::arch::x86_64::_mm_mpsadbw_epu8
1.27.0 · source · pub unsafe fn _mm_mpsadbw_epu8<const IMM8: i32>(
a: __m128i,
b: __m128i,
) -> __m128i
Available on x86-64 only.
Expand description
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:
ⓘ
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
Arguments:
a
- A 128-bit vector of type__m128i
.b
- A 128-bit vector of type__m128i
.IMM8
- An 8-bit immediate operand specifying how the absolute differences are to be calculated- Bit
[2]
specify the offset for operanda
- Bits
[1:0]
specify the offset for operandb
- Bit
Returns:
- A
__m128i
vector containing the sums of the sets of absolute differences between both operands.