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optional arm feature complex #197

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optional arm feature complex #197

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2 changes: 2 additions & 0 deletions libsrc/core/simd_arm64.hpp
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Expand Up @@ -154,6 +154,7 @@ namespace ngcore
return FNMA(SIMD<double,2> (a), b, c);
}

#ifdef __ARM_FEATURE_COMPLEX
// ARM complex mult:
// https://arxiv.org/pdf/1901.07294.pdf
// c += a*b (a0re, a0im, a1re, a1im, ...),
Expand All @@ -162,6 +163,7 @@ namespace ngcore
auto tmp = vcmlaq_f64(c.Data(), a.Data(), b.Data()); // are * b
c = vcmlaq_rot90_f64(tmp, a.Data(), b.Data()); // += i*aim * b
}
#endif


NETGEN_INLINE SIMD<double,2> operator+ (SIMD<double,2> a, SIMD<double,2> b)
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