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vrsqrteq_f16
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 Arm 64-bit (64 bits)/ NEON  View official documentation
 Location: Math Functions  >  Vector Approximate Reciprocal Square Root Estimate
 Supported Architectures: A32, A64
Purpose:

VRSQRTE finds an approximate reciprocal square root of each element in a vector, and places it in the return vector.

Result:

float16x8_t

Example:
#include <arm_neon.h>
#include <stdio.h>
int main() {
 float16x8_t a = vdupq_n_f16(1.0);
 float16x8_t result = vrsqrteq_f16(a);
 float16_t output[8];
 vst1q_f16(output, result);
 printf("Result: %f %f %f %f %f %f %f %f\n", output[0], output[1], output[2], output[3], output[4], output[5], output[6], output[7]);

 return 0;
}

Prototypes

Assembly Instruction:
FRSQRTE
Usage:
float16x8_t result = vrsqrteq_f16( float16x8_t a )
Performance Metrics:
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SIMD Intrinsics Summary
SIMD Engines: 6
C Intrinsics: 10444
NEON: 4353
AVX2: 405
AVX512: 4717
SSE4.2: 598
VSX: 192
IBM-Z: 179