__lsx_vftintrm_l_d
LSX intrinsic · group: Floating Point Conversion
Synopsis
__m128i __lsx_vftintrm_l_d (__m128d a)
#include <lsxintrin.h>
Instruction: vftintrm.l.d vr, vr
CPU Flags: LSX
Description
Convert double-precision floating point elements in a to signed 64-bit integer, rounding towards negative infinity.
Operation
for (int i = 0; i < 2; i++) {
dst.dword[i] = (s64)a.fp64[i]; // rounding mode is not expressed in C
}
Latency and Throughput
| CPU | µarch | Latency | Throughput (IPC) |
|---|---|---|---|
| 3C5000 | LA464 | 4 | 2 |
| 3A6000 | LA664 | 4 | 4 |
| 3C6000 | LA664 | 4 | 4 |
| 2K1000LA | LA264 | 4 | 1 |
| 2K3000 | LA364E | 4 | 1 |