__lsx_vsrlri_d
LSX intrinsic · group: Shift
Synopsis
__m128i __lsx_vsrlri_d (__m128i a, imm0_63 imm)
#include <lsxintrin.h>
Instruction: vsrlri.d vr, vr, imm
CPU Flags: LSX
Description
Logical right shift (with rounding) the unsigned 64-bit elements in a by imm, store the result to dst.
Operation
for (int i = 0; i < 2; i++) {
if (imm == 0) {
dst.dword[i] = a.dword[i];
} else {
dst.dword[i] = (a.dword[i] >> imm) + ((a.dword[i] >> (imm - 1)) & 0x1);
}
}
Tested on real machine.
Latency and Throughput
| CPU | µarch | Latency | Throughput (IPC) |
|---|---|---|---|
| 3C5000 | LA464 | 3 | 2 |
| 3A6000 | LA664 | 3 | 2 |
| 3C6000 | LA664 | 3 | 2 |
| 2K1000LA | LA264 | 2 | 1 |
| 2K3000 | LA364E | 2 | 1 |