__lsx_vfsub_d
LSX intrinsic · group: Floating Point Computation
Synopsis
__m128d __lsx_vfsub_d (__m128d a, __m128d b)
#include <lsxintrin.h>
Instruction: vfsub.d vr, vr, vr
CPU Flags: LSX
Description
Subtract corresponding double precision floating point elements in b from elements in a.
Operation
for (int i = 0; i < 2; i++) {
dst.fp64[i] = a.fp64[i] - b.fp64[i];
}
Tested on real machine.
Latency and Throughput
| CPU | µarch | Latency | Throughput (IPC) |
|---|---|---|---|
| 3C5000 | LA464 | 5 | 2 |
| 3A6000 | LA664 | 3 | 4 |
| 3C6000 | LA664 | 3 | 4 |
| 2K1000LA | LA264 | 4 | 1 |
| 2K3000 | LA364E | 4 | 1 |