File: [local] / OpenXM_contrib2 / asir2000 / engine / lmi.c (download)
Revision 1.1.1.1 (vendor branch), Fri Dec 3 07:39:08 1999 UTC (24 years, 8 months ago) by noro
Branch: NORO
CVS Tags: RELEASE_20000124, RELEASE_1_1_2, ASIR2000 Changes since 1.1: +0 -0
lines
Imported asir2000 as OpenXM_contrib2/asir2000.
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/* $OpenXM: OpenXM_contrib2/asir2000/engine/lmi.c,v 1.1.1.1 1999/12/03 07:39:08 noro Exp $ */
#include "ca.h"
#include "base.h"
#include "inline.h"
typedef struct oGEN_LM {
int id;
N dense;
N sparse;
int bit;
unsigned int lower;
} *GEN_LM;
void pwrlm0(N,N,N *);
void gen_simpn(N,N*);
void gen_simpn_force(N,N*);
int lm_lazy;
static GEN_LM current_mod_lm;
void random_lm(r)
LM *r;
{
N n,t;
if ( !current_mod_lm )
error("random_lm : current_mod_lm is not set");
randomn(current_mod_lm->bit+1,&n);
gen_simpn_force(n,&t);
MKLM(t,*r);
}
void ntosparsen(p,bits)
N p;
N *bits;
{
int l,i,j,nz;
N r;
unsigned int *pb,*rb;
if ( !p )
*bits = 0;
else {
l = n_bits(p);
pb = BD(p);
for ( i = l-1, nz = 0; i >= 0; i-- )
if ( pb[i>>5]&(1<<i&31) ) nz++;
*bits = r = NALLOC(nz); PL(r) = nz;
rb = BD(r);
for ( i = l-1, j = 0; i >= 0; i-- )
if ( pb[i>>5]&(1<<i&31) )
rb[j++] = i;
}
}
void setmod_lm(p)
N p;
{
int i;
if ( !current_mod_lm )
current_mod_lm = (GEN_LM)MALLOC(sizeof(struct oGEN_LM));
bzero((char *)current_mod_lm,sizeof(struct oGEN_LM));
current_mod_lm->dense = p;
ntosparsen(p,¤t_mod_lm->sparse);
current_mod_lm->bit = n_bits(p);
current_mod_lm->id = UP2_DENSE; /* use ordinary rep. by default */
if ( !(current_mod_lm->bit%32) ) {
for ( i = PL(p)-1; i >= 1; i-- )
if ( BD(p)[i] != 0xffffffff )
break;
if ( !i ) {
current_mod_lm->lower = (unsigned int)((((UL)1)<<32)-((UL)BD(p)[0]));
current_mod_lm->id = UP2_SPARSE; /* XXX */
}
}
}
void getmod_lm(p)
N *p;
{
if ( !current_mod_lm )
*p = 0;
else
*p = current_mod_lm->dense;
}
void simplm(n,r)
LM n;
LM *r;
{
N rem;
if ( !n )
*r = 0;
else if ( NID(n) != N_LM )
*r = n;
else {
gen_simpn(n->body,&rem);
MKLM(rem,*r);
}
}
void qtolm(q,l)
Q q;
LM *l;
{
N rn;
LM a,b,c;
if ( !q || (OID(q)==O_N && ((NID(q) == N_LM) || (NID(q) == N_GFPN))) ) { /* XXX */
*l = (LM)q;
} else if ( OID(q) == O_N && NID(q) == N_Q ) {
gen_simpn(NM(q),&rn); MKLM(rn,a);
if ( SGN(q) < 0 ) {
chsgnlm(a,&c); a = c;
}
if ( DN(q) ) {
gen_simpn_force(DN(q),&rn); MKLM(rn,b);
if ( !b )
error("qtolm : invalid denominator");
divlm(a,b,l);
} else
*l = a;
} else
error("qtolm : invalid argument");
}
#define NZLM(a) ((a)&&(NID(a)==N_LM))
void addlm(a,b,c)
LM a,b;
LM *c;
{
int s;
N t,t1;
LM z;
qtolm((Q)a,&z); a = z; qtolm((Q)b,&z); b = z;
if ( !a )
*c = b;
else if ( !b )
*c = a;
else {
addn(a->body,b->body,&t);
gen_simpn(t,&t1);
MKLM(t1,*c);
}
}
void sublm(a,b,c)
LM a,b;
LM *c;
{
int s;
N t,t1,mod;
LM z;
qtolm((Q)a,&z); a = z; qtolm((Q)b,&z); b = z;
if ( !b )
*c = a;
else if ( !a )
chsgnlm(b,c);
else {
s = subn(a->body,b->body,&t);
if ( !s )
*c = 0;
else {
MKLM(t,z);
if ( s < 0 )
chsgnlm(z,c);
else
*c = z;
}
}
}
void mullm(a,b,c)
LM a,b;
LM *c;
{
N t,q,r;
LM z;
qtolm((Q)a,&z); a = z; qtolm((Q)b,&z); b = z;
if ( !a || !b )
*c = 0;
else {
kmuln(a->body,b->body,&t);
gen_simpn(t,&r);
MKLM(r,*c);
}
}
void divlm(a,b,c)
LM a,b;
LM *c;
{
LM r;
Q t,m,i;
LM z;
qtolm((Q)a,&z); a = z; qtolm((Q)b,&z); b = z;
if ( !b )
error("divlm: division by 0");
else if ( !a )
*c = 0;
else {
NTOQ(b->body,1,t); NTOQ(current_mod_lm->dense,1,m);
invl(t,m,&i);
MKLM(NM(i),r);
mullm(a,r,c);
}
}
void chsgnlm(a,c)
LM a,*c;
{
LM t;
N s,u;
if ( !a )
*c = a;
else {
qtolm((Q)a,&t); a = t;
gen_simpn_force(a->body,&s);
subn(current_mod_lm->dense,s,&u);
MKLM(u,*c);
}
}
void pwrlm(a,b,c)
LM a;
Q b;
LM *c;
{
LM t;
N s;
if ( !b ) {
MKLM(ONEN,*c);
} else if ( !a )
*c = 0;
else {
qtolm((Q)a,&t); a = t;
pwrlm0(a->body,NM(b),&s);
MKLM(s,*c);
}
}
void pwrlm0(a,n,c)
N a,n;
N *c;
{
N n1,t,t1,t2,r1;
int r;
if ( !n )
*c = ONEN;
else if ( UNIN(n) )
*c = a;
else {
r = divin(n,2,&n1);
pwrlm0(a,n1,&t);
kmuln(t,t,&t1); gen_simpn(t1,&r1);
if ( r ) {
kmuln(r1,a,&t2); gen_simpn(t2,&r1);
}
*c = r1;
}
}
int cmplm(a,b)
LM a,b;
{
LM z;
qtolm((Q)a,&z); a = z; qtolm((Q)b,&z); b = z;
if ( !a )
if ( !b )
return 0;
else
return -1;
else if ( !b )
return 1;
else
return cmpn(a->body,b->body);
}
void remn_special(N,N,int,unsigned int ,N *);
void gen_simpn(a,b)
N a;
N *b;
{
if ( !current_mod_lm )
error("gen_simpn: current_mod_lm is not set");
if ( lm_lazy )
*b = a;
else if ( current_mod_lm->id == UP2_SPARSE )
remn_special(a,current_mod_lm->dense,current_mod_lm->bit,current_mod_lm->lower,b);
else
remn(a,current_mod_lm->dense,b);
}
void gen_simpn_force(a,b)
N a;
N *b;
{
if ( !current_mod_lm )
error("gen_simpn_force: current_mod_lm is not set");
else if ( current_mod_lm->id == UP2_SPARSE )
remn_special(a,current_mod_lm->dense,current_mod_lm->bit,current_mod_lm->lower,b);
else
remn(a,current_mod_lm->dense,b);
}