30 lines
594 B
C++
30 lines
594 B
C++
#include "nr.h"
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void NR::mpdiv(Vec_O_UCHR &q, Vec_O_UCHR &r, Vec_I_UCHR &u, Vec_I_UCHR &v)
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{
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const int MACC=1;
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int i,is,mm;
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int n=u.size();
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int m=v.size();
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int p=r.size();
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int n_min=MIN(m,p);
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if (m > n) nrerror("Divisor longer than dividend in mpdiv");
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mm=m+MACC;
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Vec_UCHR s(mm),rr(mm),ss(mm+1),qq(n-m+1),t(n);
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mpinv(s,v);
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mpmul(rr,s,u);
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mpsad(ss,rr,1);
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mplsh(ss);
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mplsh(ss);
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mpmov(qq,ss);
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mpmov(q,qq);
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mpmul(t,qq,v);
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mplsh(t);
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mpsub(is,t,u,t);
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if (is != 0) nrerror("MACC too small in mpdiv");
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for (i=0;i<n_min;i++) r[i]=t[i+n-m];
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if (p>m)
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for (i=m;i<p;i++) r[i]=0;
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}
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