Only for real arguments. Signature is identical to fpmul:
vector<float,8> fpneg_abs_mul(vector<float,32> xbuf, int xstart, unsigned int xoffs, vector<float,8> zbuf, int zstart, unsigned int zoffs)
It returns the opposite value of the product:
for (i = 0 ; i < 8 ; i++)
ret[i] = - abs ( xbuf[xstart + xoffs[i]] * zbuf[zstart + zoffs[i]] )