__lasx_xvabsd_b

LASX intrinsic · group: Integer Computation

Synopsis

__m256i __lasx_xvabsd_b (__m256i a, __m256i b)
#include <lasxintrin.h>
Instruction: xvabsd.b xr, xr, xr
CPU Flags: LASX

Description

Compute the absolute difference between corresponding signed 8-bit elements in a and b, save the result in dst.

Operation

for (int i = 0; i < 32; i++) {
  dst.byte[i] = ((s8)a.byte[i] > (s8)b.byte[i]) ? (a.byte[i] - b.byte[i])
                                                : (b.byte[i] - a.byte[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

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