__lasx_xvrotr_h
LASX intrinsic · group: Shift
Synopsis
__m256i __lasx_xvrotr_h (__m256i a, __m256i b)
#include <lasxintrin.h>
Instruction: xvrotr.h xr, xr, xr
CPU Flags: LASX
Description
Rotate right each unsigned 16-bit element in a by the corresponding element of b modulo 16, store the result in dst.
Operation
for (int i = 0; i < 16; i++) {
dst.half[i] = (a.half[i] >> (b.half[i] & 0xf)) |
(a.half[i] << (16 - (b.half[i] & 0xf)));
}
Tested on real machine.
Latency and Throughput
| CPU | µarch | Latency | Throughput (IPC) |
|---|---|---|---|
| 3C5000 | LA464 | 2 | 2 |
| 3A6000 | LA664 | 1 | 4 |
| 3C6000 | LA664 | 1 | 4 |