__lasx_xvsrlri_w

LASX intrinsic · group: Shift

Synopsis

__m256i __lasx_xvsrlri_w (__m256i a, imm0_31 imm)
#include <lasxintrin.h>
Instruction: xvsrlri.w xr, xr, imm
CPU Flags: LASX

Description

Logical right shift (with rounding) the unsigned 32-bit elements in a by imm, store the result to dst.

Operation

for (int i = 0; i < 8; i++) {
  if (imm == 0) {
    dst.word[i] = a.word[i];
  } else {
    dst.word[i] = (a.word[i] >> imm) + ((a.word[i] >> (imm - 1)) & 0x1);
  }
}

Tested on real machine.

Latency and Throughput

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

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