__lsx_vslt_wu
LSX intrinsic · group: Integer Comparison
Synopsis
__m128i __lsx_vslt_wu (__m128i a, __m128i b)
#include <lsxintrin.h>
Instruction: vslt.wu vr, vr, vr
CPU Flags: LSX
Description
Compare the unsigned 32-bit elements in a and b, store all-ones to dst if corresponding element in a is less than b, zero otherwise.
Operation
for (int i = 0; i < 4; i++) {
dst.word[i] = ((u32)a.word[i] < (u32)b.word[i]) ? 0xFFFFFFFF : 0;
}
Tested on real machine.
Latency and Throughput
| CPU | µarch | Latency | Throughput (IPC) |
|---|---|---|---|
| 3C5000 | LA464 | 1 | 2 |
| 3A6000 | LA664 | 1 | 4 |
| 3C6000 | LA664 | 1 | 4 |
| 2K1000LA | LA264 | 1 | 1 |
| 2K3000 | LA364E | 1 | 1 |