__lsx_vfcmp_saf_d
LSX intrinsic · group: Floating Point Comparison
Synopsis
__m128i __lsx_vfcmp_saf_d (__m128d a, __m128d b)
#include <lsxintrin.h>
Instruction: vfcmp.saf.d vr, vr, vr
CPU Flags: LSX
Description
Compare corresponding double precision elements in a and b, save the comparison result (all ones if AF(Always False), all zeros otherwise) into dst. An exception is raised for QNaN.
Operation
for (int i = 0; i < 2; i++) {
if (fp_compare_saf(a.fp64[i], b.fp64[i])) {
dst.dword[i] = 0xFFFFFFFFFFFFFFFF;
} else {
dst.dword[i] = 0;
}
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 |