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* software is freely granted, provided that this notice
/*
int32_t n,hx,hy,hz,ix,iy,sx,i;
uint32_t lx,ly,lz;
if(lx==ly)
return Zero[(uint32_t)sx>>31]; /* |x|=|y| return x*0*/
if(ix >= -1022)
if(iy >= -1022)
return Zero[(uint32_t)sx>>31];
return Zero[(uint32_t)sx>>31];
lx = (lx>>n)|((uint32_t)hx<<(32-n));
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