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vrsqrte_f64
ADD TO COMPARE ADDED TO COMPARE

 Arm 64-bit (64 bits)/ NEON  View official documentation
Purpose:

Floating-point Reciprocal Square Root Estimate. This instruction calculates an approximate square root for each vector element in the source SIMD&FP register, places the result in a vector, and writes the vector to the destination SIMD&FP register.

Result:

float64x1_t

Example:
#include <arm_neon.h>
#include <stdio.h>
int main() {
 float64x1_t a = {
  4.0
 };
 float64x1_t result = vrsqrte_f64(a);
 double out[1];
 vst1_f64(out, result);
 for (int i = 0; i < 1; i++) {
   printf("%f ", out[i]);
  }
  printf("\n");

  return 0;
 }

Prototypes

Assembly Instruction:
FRSQRTE
Usage:
float64x1_t output = vrsqrte_f64( float64x1_t a )
DB statistics
SIMD Engines: 5
C Intrinsics: 10702
NEON: 4232
AVX2: 462
AVX512: 4955
SSE4.2: 652
VSX: 401