__lsx_vftintrz_lu_d
LSX intrinsic · group: Floating Point Conversion
Synopsis
__m128i __lsx_vftintrz_lu_d (__m128d a)
#include <lsxintrin.h>
Instruction: vftintrz.lu.d vr, vr
CPU Flags: LSX
Description
Convert double-precision floating point elements in a to unsigned 64-bit integer, rounding towards zero.
Operation
for (int i = 0; i < 2; i++) {
dst.dword[i] = (u64)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 |