__lasx_xvbitrevi_h
LASX intrinsic · group: Bitwise Operations
Synopsis
__m256i __lasx_xvbitrevi_h (__m256i a, imm0_15 imm)
#include <lasxintrin.h>
Instruction: xvbitrevi.h xr, xr, imm
CPU Flags: LASX
Description
For each 16-bit element, toggle the bit indexed by imm, save the result in dst.
Examples
__m256i __lasx_xvbitrevi_h( __m256i{ 0x0f0f0f0f0f0f0f0f, 0x99aabbccddeeff00, 0xabcdef1212341234, 0xaabbaabbddeeddee}, 1)
= 0x0f0d0f0d0f0d0f0d 0x99a8bbceddecff02 0xabcfef1012361236 0xaab9aab9ddecddec
Operation
for (int i = 0; i < 16; i++) {
dst.half[i] = a.half[i] ^ ((u16)1 << imm);
}
Tested on real machine.
Latency and Throughput
| CPU | µarch | Latency | Throughput (IPC) |
|---|---|---|---|
| 3C5000 | LA464 | 2 | 2 |
| 3A6000 | LA664 | 2 | 2 |
| 3C6000 | LA664 | 2 | 2 |