version 1.3, 2001/06/25 01:35:21 |
version 1.4, 2001/06/25 04:11:42 |
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/* $OpenXM: OpenXM_contrib2/asir2000/engine/Mgfs.c,v 1.2 2001/06/22 08:51:12 noro Exp $ */ |
/* $OpenXM: OpenXM_contrib2/asir2000/engine/Mgfs.c,v 1.3 2001/06/25 01:35:21 noro Exp $ */ |
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#include "ca.h" |
#include "ca.h" |
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/* f1 = f1->c[0]+f1->c[1]*y+..., f2 = f2->c[0]+f2->c[1]*y+... mod y^n */ |
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void mulsfbm(bound,f1,f2,fr) |
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int bound; |
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BM f1,f2,fr; |
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{ |
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UM mul,t,s; |
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int i,j,h,d1,d2; |
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if ( DEG(f1) < bound || DEG(f2) < bound ) |
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error("mulsfbm : invalid input"); |
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d1 = DEG(COEF(f1)[0]); |
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for ( i = 1; i < bound; i++ ) |
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d1 = MAX(DEG(COEF(f1)[i]),d1); |
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d2 = DEG(COEF(f2)[0]); |
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for ( i = 1; i < bound; i++ ) |
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d2 = MAX(DEG(COEF(f2)[i]),d2); |
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t = W_UMALLOC(d1+d2); |
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s = W_UMALLOC(d1+d2); |
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for ( i = 0; i < bound; i++ ) { |
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mul = COEF(f2)[i]; |
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if ( DEG(mul) >= 0 ) |
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for ( j = 0; i+j < bound; j++ ) { |
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if ( COEF(f1)[j] ) { |
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mulsfum(COEF(f1)[j],mul,t); |
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addsfum(t,COEF(fr)[i+j],s); |
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cpyum(s,COEF(fr)[i+j]); |
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} |
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} |
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} |
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DEG(fr) = bound; |
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} |
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/* g += f */ |
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void addtosfbm(bound,f,g) |
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int bound; |
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BM f,g; |
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{ |
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int i,d1,d2; |
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UM t; |
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d1 = DEG(COEF(f)[0]); |
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for ( i = 1; i < bound; i++ ) |
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d1 = MAX(DEG(COEF(f)[i]),d1); |
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d2 = DEG(COEF(g)[0]); |
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for ( i = 1; i < bound; i++ ) |
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d2 = MAX(DEG(COEF(g)[i]),d2); |
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t = W_UMALLOC(MAX(d1,d2)); |
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for ( i = 0; i < bound; i++ ) { |
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addsfum(COEF(f)[i],COEF(g)[i],t); |
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cpyum(t,COEF(g)[i]); |
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} |
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} |
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void addsfarray(n,a1,a2) |
void addsfarray(n,a1,a2) |
int n; |
int n; |
int *a1,*a2; |
int *a1,*a2; |
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} |
} |
} |
} |
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/* f(y) -> f(y+a) */ |
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void shiftsfbm(bound,f,a) |
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int bound; |
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BM f; |
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int a; |
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{ |
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int i,j,d; |
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UM pwr,ya,w,t,s; |
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UM *c; |
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if ( bound <= 0 ) |
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return; |
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else { |
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c = COEF(f); |
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d = DEG(c[0]); |
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for ( i = 1; i < bound; i++ ) |
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d = MAX(DEG(c[i]),d); |
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w = W_UMALLOC(d); |
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t = W_UMALLOC(d); |
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s = W_UMALLOC(bound); |
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/* pwr = 1 */ |
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pwr = W_UMALLOC(bound); DEG(pwr) = 0; COEF(pwr)[0] = _onesf(); |
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/* ya = y+a */ |
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ya = W_UMALLOC(1); DEG(ya) = 1; |
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COEF(ya)[0] = a; COEF(ya)[1] = _onesf(); |
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for ( i = 0; i < bound; i++ ) { |
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/* c[i] does not change */ |
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for ( j = 0; j < i; j++ ) { |
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mulssfum(c[i],COEF(pwr)[j],w); |
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addsfum(w,c[j],t); cpyum(t,c[j]); |
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} |
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if ( i < bound-1 ) { |
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mulsfum(pwr,ya,s); cpyum(s,pwr); |
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} |
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} |
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} |
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} |
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/* clear the body of f */ |
/* clear the body of f */ |
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void clearsflum(bound,n,f) |
void clearsflum(bound,n,f) |
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DEG(f) = 0; |
DEG(f) = 0; |
for ( c = COEF(f), i = 0; i <= n; i++ ) |
for ( c = COEF(f), i = 0; i <= n; i++ ) |
bzero(c[i],(bound+1)*sizeof(int)); |
bzero(c[i],(bound+1)*sizeof(int)); |
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} |
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void clearsfbm(bound,n,f) |
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int bound,n; |
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BM f; |
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{ |
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int i; |
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UM *c; |
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DEG(f) = bound; |
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for ( c = COEF(f), i = 0; i < bound; i++ ) |
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clearum(c[i],n); |
} |
} |
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/* f += g */ |
/* f += g */ |