__lsx_vslti_d
LSX intrinsic · group: Integer Comparison
Synopsis
__m128i __lsx_vslti_d (__m128i a, imm_n16_15 imm)
#include <lsxintrin.h>
Instruction: vslti.d vr, vr, imm
CPU Flags: LSX
Description
Compare the signed 64-bit elements in a and the sign-extended imm, store all-ones to dst if corresponding element in a is less than imm, zero otherwise.
Operation
for (int i = 0; i < 2; i++) {
dst.dword[i] = ((s64)a.dword[i] < imm) ? 0xFFFFFFFFFFFFFFFF : 0;
}
Tested on real machine.
Latency and Throughput
| CPU | µarch | Latency | Throughput (IPC) |
|---|---|---|---|
| 3C5000 | LA464 | 2 | 2 |
| 3A6000 | LA664 | 2 | 4 |
| 3C6000 | LA664 | 2 | 4 |
| 2K1000LA | LA264 | 2 | 1 |
| 2K3000 | LA364E | 2 | 1 |