__lsx_vrotri_b
LSX intrinsic · group: Shift
Synopsis
__m128i __lsx_vrotri_b (__m128i a, imm0_7 imm)
#include <lsxintrin.h>
Instruction: vrotri.b vr, vr, imm
CPU Flags: LSX
Description
Rotate right the unsigned 8-bit elements in a by imm, store the result to dst.
Operation
for (int i = 0; i < 16; i++) {
dst.byte[i] = (a.byte[i] >> imm) | (a.byte[i] << (8 - imm));
}
Tested on real machine.
Latency and Throughput
| CPU | µarch | Latency | Throughput (IPC) |
|---|---|---|---|
| 3C5000 | LA464 | 2 | 2 |
| 3A6000 | LA664 | 1 | 4 |
| 3C6000 | LA664 | 1 | 4 |
| 2K1000LA | LA264 | 2 | 1 |
| 2K3000 | LA364E | 1 | 1 |