AVX-512 SIMD Multiplication

AVX-512 SIMD Multiplication

Here is the basic 16 float SIMD vector multiplication using 512-bits in AVX-512.

    void aussie_avx512_multiply_16_floats(
        float v1[16], float v2[16], float vresult[16])
    {
        // Multiply 16x32-bit floats in 512-bit registers
        __m512 r1 = _mm512_loadu_ps(v1); // Load 16 floats
        __m512 r2 = _mm512_loadu_ps(v2);
        __m512 dst = _mm512_mul_ps(r1, r2); // Multiply (SIMD)
        _mm512_storeu_ps(vresult, dst);  // Convert to floats
    }

Note that AVX-512 will fail with an “unhandled exception: illegal instruction” (e.g. in MSVS) if AVX-512 is not supported on your CPU.

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