__lsx_vabsd_du

LSX intrinsic · group: Integer Computation

Synopsis

__m128i __lsx_vabsd_du (__m128i a, __m128i b)
#include <lsxintrin.h>
Instruction: vabsd.du vr, vr, vr
CPU Flags: LSX

Description

Compute the absolute difference between corresponding unsigned 64-bit elements in a and b, save the result in dst.

Operation

for (int i = 0; i < 2; i++) {
  dst.dword[i] = ((u64)a.dword[i] > (u64)b.dword[i])
                     ? (a.dword[i] - b.dword[i])
                     : (b.dword[i] - a.dword[i]);
}

Tested on real machine.

Latency and Throughput

CPU	µarch	Latency	Throughput (IPC)
3C5000	LA464	2	2
3A6000	LA664	2	2
3C6000	LA664	2	2
2K1000LA	LA264	2	1
2K3000	LA364E	2	1

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