+ /**
+ * Multiply a vector of floats by a scalar float. Source and
+ * destination vectors must overlap exactly or not at all.
+ * @param dst result vector, 16-byte aligned
+ * @param src input vector, 16-byte aligned
+ * @param mul scalar value
+ * @param len length of vector, multiple of 4
+ */
+ void (*vector_fmul_scalar)(float *dst, const float *src, float mul,
+ int len);
+ /**
+ * Multiply a vector of floats by concatenated short vectors of
+ * floats and by a scalar float. Source and destination vectors
+ * must overlap exactly or not at all.
+ * [0]: short vectors of length 2, 8-byte aligned
+ * [1]: short vectors of length 4, 16-byte aligned
+ * @param dst output vector, 16-byte aligned
+ * @param src input vector, 16-byte aligned
+ * @param sv array of pointers to short vectors
+ * @param mul scalar value
+ * @param len number of elements in src and dst, multiple of 4
+ */
+ void (*vector_fmul_sv_scalar[2])(float *dst, const float *src,
+ const float **sv, float mul, int len);
+ /**
+ * Multiply short vectors of floats by a scalar float, store
+ * concatenated result.
+ * [0]: short vectors of length 2, 8-byte aligned
+ * [1]: short vectors of length 4, 16-byte aligned
+ * @param dst output vector, 16-byte aligned
+ * @param sv array of pointers to short vectors
+ * @param mul scalar value
+ * @param len number of output elements, multiple of 4
+ */
+ void (*sv_fmul_scalar[2])(float *dst, const float **sv,
+ float mul, int len);
+ /**
+ * Calculate the scalar product of two vectors of floats.
+ * @param v1 first vector, 16-byte aligned
+ * @param v2 second vector, 16-byte aligned
+ * @param len length of vectors, multiple of 4
+ */
+ float (*scalarproduct_float)(const float *v1, const float *v2, int len);
+ /**
+ * Calculate the sum and difference of two vectors of floats.
+ * @param v1 first input vector, sum output, 16-byte aligned
+ * @param v2 second input vector, difference output, 16-byte aligned
+ * @param len length of vectors, multiple of 4
+ */
+ void (*butterflies_float)(float *restrict v1, float *restrict v2, int len);