156 lines
3.1 KiB
Plaintext
156 lines
3.1 KiB
Plaintext
/* This file has been generated from Jehanne with
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* a port of mpc from 9front
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*
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* To regenerate use:
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* mpc file.mp > file.mpc
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*/
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void legendresymbol(mpint *a, mpint *p, mpint *r){
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mpint *pm1 = mpnew(0);
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mpsub(p, mpone, pm1);
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mpright(pm1, 1, r);
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mpexp(a, r, p, r);
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if(mpcmp(r, pm1) == 0){
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mpassign(mpone, r);
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r->sign = -1;
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}
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mpfree(pm1);
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}
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void msqrt(mpint *a, mpint *p, mpint *r){
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mpint *gs = mpnew(0);
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mpint *m = mpnew(0);
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mpint *t = mpnew(0);
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mpint *g = mpnew(0);
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mpint *b = mpnew(0);
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mpint *x = mpnew(0);
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mpint *n = mpnew(0);
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mpint *s = mpnew(0);
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mpint *e = mpnew(0);
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mpint *tmp1 = mpnew(0);
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legendresymbol(a, p, tmp1);
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if(mpcmp(tmp1, mpone) != 0){
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mpassign(mpzero, r);
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}else{
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if(mpcmp(a, mpzero) == 0){
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mpassign(mpzero, r);
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}else{
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if(mpcmp(p, mptwo) == 0){
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mpassign(a, r);
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}else{
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mpint *tmp2 = mpnew(0);
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uitomp(4UL, tmp2);
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mpmod(p, tmp2, tmp2);
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mpint *tmp3 = mpnew(0);
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uitomp(3UL, tmp3);
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if(mpcmp(tmp2, tmp3) == 0){
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mpadd(p, mpone, e);
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mpright(e, 2, e);
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mpexp(a, e, p, r);
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}else{
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mpsub(p, mpone, s);
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mpassign(mpzero, e);
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for(;;){
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mpint *tmp4 = mpnew(0);
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mpmod(s, mptwo, tmp4);
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if(mpcmp(tmp4, mpzero) == 0){
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mpright(s, 1, s);
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mpadd(e, mpone, e);
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}else{
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mpfree(tmp4);
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break;
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}
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mpfree(tmp4);
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}
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mpassign(mptwo, n);
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for(;;){
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mpint *tmp5 = mpnew(0);
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legendresymbol(n, p, tmp5);
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mpint *tmp6 = mpnew(0);
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mpassign(mpone, tmp6);
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tmp6->sign = -1;
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if(mpcmp(tmp5, tmp6) != 0){
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mpadd(n, mpone, n);
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}else{
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mpfree(tmp6);
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mpfree(tmp5);
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break;
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}
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mpfree(tmp5);
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mpfree(tmp6);
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}
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mpmodadd(s, mpone, p, x);
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mpright(x, 1, x);
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mpexp(a, x, p, x);
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mpexp(a, s, p, b);
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mpexp(n, s, p, g);
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for(;;){
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if(0 == 0){
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mpassign(b, t);
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mpassign(mpzero, m);
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for(;;){
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if(mpcmp(m, e) < 0){
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if(mpcmp(t, mpone) == 0){
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break;
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}
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mpmul(t, t, t);
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mpmod(t, p, t);
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mpadd(m, mpone, m);
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}else{
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break;
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}
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}
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if(mpcmp(m, mpzero) == 0){
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mpassign(x, r);
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break;
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}
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mpsub(e, m, t);
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mpsub(t, mpone, t);
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mpexp(mptwo, t, nil, t);
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mpexp(g, t, p, gs);
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mpmodmul(gs, gs, p, g);
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mpmodmul(x, gs, p, x);
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mpmodmul(b, g, p, b);
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mpassign(m, e);
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}else{
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break;
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}
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}
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}
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mpfree(tmp2);
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mpfree(tmp3);
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}
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}
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}
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mpfree(tmp1);
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mpfree(gs);
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mpfree(m);
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mpfree(t);
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mpfree(g);
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mpfree(b);
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mpfree(x);
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mpfree(n);
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mpfree(s);
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mpfree(e);
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}
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void misqrt(mpint *a, mpint *p, mpint *r){
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mpint *e = mpnew(0);
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mpint *tmp1 = mpnew(0);
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uitomp(4UL, tmp1);
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mpmod(p, tmp1, tmp1);
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mpint *tmp2 = mpnew(0);
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uitomp(3UL, tmp2);
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if(mpcmp(tmp1, tmp2) == 0){
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uitomp(3UL, e);
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mpsub(p, e, e);
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mpright(e, 2, e);
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mpexp(a, e, p, r);
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}else{
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msqrt(a, p, r);
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if(mpcmp(r, mpzero) != 0){
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mpinvert(r, p, r);
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}
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}
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mpfree(tmp1);
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mpfree(tmp2);
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mpfree(e);
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}
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