__lasx_xvbitclri_d
LASX intrinsic · group: Bitwise Operations
Synopsis
__m256i __lasx_xvbitclri_d (__m256i a, imm0_63 imm)
#include <lasxintrin.h>
Instruction: xvbitclri.d xr, xr, imm
CPU Flags: LASX
Description
For each 64-bit element, clear the bit indexed by imm, save the result in dst.
Examples
__m256i __lasx_xvbitclri_d( __m256i{ 0xffffffffffffffff, 0x99aabbccddeeff00, 0xabcdef1212341234, 0xaabbaabbddeeddee}, 1)
= 0xfffffffffffffffd 0x99aabbccddeeff00 0xabcdef1212341234 0xaabbaabbddeeddec
Operation
for (int i = 0; i < 4; i++) {
dst.dword[i] = a.dword[i] & (~((u64)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 |