__lasx_xvftintrp_w_s

LASX intrinsic · group: Floating Point Conversion

Synopsis

__m256i __lasx_xvftintrp_w_s (__m256 a)
#include <lasxintrin.h>
Instruction: xvftintrp.w.s xr, xr
CPU Flags: LASX

Description

Convert single-precision floating point elements in a to signed 32-bit integer, rounding towards positive infinity.

Operation

for (int i = 0; i < 8; i++) {
  dst.word[i] = (s32)a.fp32[i]; // rounding mode is not expressed in C
}

// Expands to:

if (0) {
  dst.word[0] = (s32)a.fp32[0];
  dst.word[1] = (s32)a.fp32[1];
  dst.word[2] = (s32)a.fp32[2];
  dst.word[3] = (s32)a.fp32[3];
  dst.word[4] = (s32)a.fp32[4];
  dst.word[5] = (s32)a.fp32[5];
  dst.word[6] = (s32)a.fp32[6];
  dst.word[7] = (s32)a.fp32[7];
}

Latency and Throughput

CPU	µarch	Latency	Throughput (IPC)
3C5000	LA464	4	2
3A6000	LA664	4	4
3C6000	LA664	4	4

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