__lasx_xvpcnt_h
LASX intrinsic · group: Bitwise Operations
Synopsis
__m256i __lasx_xvpcnt_h (__m256i a)
#include <lasxintrin.h>
Instruction: xvpcnt.h xr, xr
CPU Flags: LASX
Description
Count the number of ones (population, popcount) in 16-bit elements in a.
Examples
__m256i __lasx_xvpcnt_h(__m256i{ 0x1122334455667788, 0x99aabbccddeeff00, 0xabcdef1212341234, 0xaabbaabbddeeddee})
= 0x0004000600080008 0x0008000a000c0008 0x000a000900050005 0x000a000a000c000c
Operation
for (int i = 0; i < 16; i++) {
dst.half[i] = popcount(a.half[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 |