=================================================================== RCS file: /home/cvs/OpenXM_contrib2/asir2000/engine/igcdhack.c,v retrieving revision 1.3 retrieving revision 1.4 diff -u -p -r1.3 -r1.4 --- OpenXM_contrib2/asir2000/engine/igcdhack.c 2000/08/22 05:04:05 1.3 +++ OpenXM_contrib2/asir2000/engine/igcdhack.c 2000/12/21 02:51:45 1.4 @@ -45,7 +45,7 @@ * DEVELOPER SHALL HAVE NO LIABILITY IN CONNECTION WITH THE USE, * PERFORMANCE OR NON-PERFORMANCE OF THE SOFTWARE. * - * $OpenXM: OpenXM_contrib2/asir2000/engine/igcdhack.c,v 1.2 2000/08/21 08:31:27 noro Exp $ + * $OpenXM: OpenXM_contrib2/asir2000/engine/igcdhack.c,v 1.3 2000/08/22 05:04:05 noro Exp $ */ #if 0 #include "base.h" @@ -54,20 +54,25 @@ #define SIGNED_VAL(a,s) ((s)>0?(a): -(a)) #endif -#undef FULLSET - - static int negate_nbd( b, l ) int *b, l; /* It is assumed that l > 0 and b[0] != 0 */ { int i, nz; +#if BSH == BIT_WIDTH_OF_INT + *b = - *b; + for ( nz = i = 1 ; i < l; ) { + b++, i++; + if ( (*b ^= BMask) != 0 ) nz = i; + } +#else *b = BASE - *b; for ( nz = i = 1 ; i < l; ) { b++, i++; if ( (*b ^= BMASK) != 0 ) nz = i; } +#endif return nz; } @@ -75,6 +80,9 @@ int *b, l; /****************/ static int abs_U_V_maxrshift( u, lu, v, lv, a ) +#if BSH == BIT_WIDTH_OF_INT +unsigned +#endif int *u, lu, *v, lv, *a; /* * Compute | U - V | >> (as much as possible) in a[], where U = u[0:lu-1] @@ -82,7 +90,11 @@ int *u, lu, *v, lv, *a; * multiplied by the sign of (U-V). */ { - int sign, rsh, t, b, i, i_1, l, *p = a; + int sign; +#if BSH == BIT_WIDTH_OF_INT + unsigned +#endif + int rsh, t, b, i, i_1, l, *p = a; /* first, determine U <, ==, > V */ sign = 1; @@ -109,25 +121,61 @@ int *u, lu, *v, lv, *a; return SIGNED_VAL( i, sign ); } /**/ +#if BSH == BIT_WIDTH_OF_INT + t = u[0] - v[0]; + b = u[0] >= v[0] ? 0 : 1; +#else if ( (t = u[0] - v[0]) >= 0 ) b = 0; else b = 1, t += BASE; +#endif TRAILINGZEROS( t, rsh ); /**/ if ( rsh != 0 ) { +#if BSH == BIT_WIDTH_OF_INT + unsigned +#endif int w, lsh = BSH - rsh; /* subtract v[*] from u[*] */ for ( i = 1, l = 0; i < lv; i++, t = w >> rsh ) { +#if BSH == BIT_WIDTH_OF_INT + w = u[i] - v[i] - b; + b = (u[i] > v[i]) || (u[i] == v[i] && b == 0) ? 0 : 1; + if ( (*p++ = t | (w << lsh)) != 0 ) l = i; +#else if ( (w = u[i] - v[i] - b) >= 0 ) b = 0; else b = 1, w += BASE; if ( (*p++ = t | ((w << lsh) & BMASK)) != 0 ) l = i; +#endif } /* subtraction of V completed. Note there may exist non-0 borrow b */ if ( i >= lu ) /* lu == lv, and b==0 is implied */ goto chk_nz; /* we still have (lu-i) elms in U */ +#if BSH == BIT_WIDTH_OF_INT if ( b != 0 ) { /* non-zero borrow */ + if ( (w = u[i++] -1) != 0 ) t |= (w << lsh); + if ( i >= lu ) { /* lu == lv+1. The M.S. word w may become 0 */ + if ( w != 0 ) { + *p++ = t; + l = lv; + t = w >> rsh; + } else lu--; + goto chk_nz; + } + /**/ + *p++ = t; + if ( w == BMask ) { + while ( (w = u[i++]) == 0 ) *p++ = BMask; + w -= 1; + *p++ = (BMask >> rsh) | (w << lsh); + } + t = w >> rsh; + } + for ( ; i < lu; i++, t = w >> rsh ) *p++ = t | ((w = u[i]) << lsh); +#else + if ( b != 0 ) { /* non-zero borrow */ if ( (w = u[i++] -1) != 0 ) t |= ((w << lsh) & BMASK); - if ( i >= lu ) { /* lu == lv+1. The M.S. word w may beome 0 */ + if ( i >= lu ) { /* lu == lv+1. The M.S. word w may become 0 */ if ( w != 0 ) { *p++ = t; l = lv; @@ -144,6 +192,7 @@ int *u, lu, *v, lv, *a; t = w >> rsh; } for ( ; i < lu; i++, t = w >> rsh ) *p++ = t | (((w = u[i]) << lsh) & BMASK); +#endif l = i -1; chk_nz: if ( t != 0 ) *p = t, l = /*1 + (p - a)*/ lu; @@ -152,15 +201,34 @@ int *u, lu, *v, lv, *a; /* rsh == 0 : need not be right-shifted */ *p++ = t, l = 1; for ( i = 1; i < lv; ) { +#if BSH == BIT_WIDTH_OF_INT + t = u[i] - v[i] - b; + b = (u[i] > v[i]) || (u[i] == v[i] && b == 0) ? 0 : 1; + i++; + if ( (*p++ = t) != 0 ) l = i; +#else if ( (t = u[i] - v[i] - b) >= 0 ) b = 0; else b = 1, t += BASE; i++; if ( (*p++ = t) != 0 ) l = i; +#endif } if ( i >= lu ) /* lu == lv, and b==0 is implied */ goto ret_nz; if ( b != 0 ) { /* non-zero borrow */ t = u[i++] -1; if ( i >= lu ) /* lu == lv+1. The M.S. word w may beome 0 */ goto chk_nz; +#if BSH == BIT_WIDTH_OF_INT + if ( t == BMask ) { + do *p++ = BMask; while ( (t = u[i++]) == 0 ); + t -= 1; + if ( i >= lu ) { + l = lu; + if ( t == 0 ) l--; + else *p = t; + goto ret_nz; + } + } +#else if ( t < 0 ) { do *p++ = BMASK; while ( (t = u[i++]) == 0 ); t -= 1; @@ -171,6 +239,7 @@ int *u, lu, *v, lv, *a; goto ret_nz; } } +#endif *p++ = t; } for ( ; i < lu; i++ ) *p++ = u[i]; @@ -190,22 +259,57 @@ static int abs_U_aV_c(), abs_U_aV_c_sh(); static int abs_aVplusc_U(), abs_aVplusc_U_sh(); static int abs_U_aV_maxrshift( u, lu, a, v, lv, ans ) +#if BSH == BIT_WIDTH_OF_INT +unsigned +#endif int *u, lu, a, *v, lv, *ans; { - int i, t, c, rsh, l, *p = ans, w, lsh; - int hi; +#if BSH == BIT_WIDTH_OF_INT + unsigned int i, t, c, rsh, *p = ans, w, lsh, b, hi; + int l; +#else + int i, t, c, rsh, l, *p = ans, w, lsh, hi; +#endif if ( a == 1 ) return( (l = abs_U_V_maxrshift( u, lu, v, lv, ans )) >= 0 ? l : -l ); /**/ for ( l = lu <= lv ? lu : lv, i = c = 0; i < l; ) { - DMA( a, v[i], c, hi, t, not_used ); + DMA( a, v[i], c, hi, t ); c = hi; - if ( (t -= u[i++]) != 0 ) goto non0w; + if ( (w = u[i++]) == t ) continue; + /******/ + u += i, lu -= i, v += i, lv -= i; + /* | t + BASE*(c + a*v[0:lv-1] - u[0:lu-1] | */ + if ( lv < lu ) { /* a*V < U if lv U if lv>lu, and very likely even if lv==lu */ + b = 0; + if ( t >= w ) t -= w; + else { + t -= w; +#if BSH != BIT_WIDTH_OF_INT + t += BASE; +#endif + if ( c != 0 ) c--; + else b = 1; + } + } + TRAILINGZEROS( t, rsh ); + return( lv < lu ? ( rsh == 0 ? abs_U_aV_c( t, u, lu, a, v, lv, c, ans ) : + abs_U_aV_c_sh( t, u, lu, a, v, lv, c, rsh, ans ) ) : + rsh == 0 ? abs_aVplusc_U( t, a, v, lv, c, b, u, lu, ans ) : + abs_aVplusc_U_sh( t, a, v, lv, c, b, u, lu, rsh, ans ) ); } /**/ if ( i < lv ) { /* no more u[] elm.'s, and we still have non-zero v[] elm's */ do { - DMA( a, v[i], c, hi, t, not_used ); + DMA( a, v[i], c, hi, t ); i++, c = hi; } while ( t == 0 ); TRAILINGZEROS( t, rsh ); @@ -219,17 +323,25 @@ int *u, lu, a, *v, lv, *ans; i = 0; if ( rsh == 0 ) { *p++ = t; - for ( ; i < lv; i++, c = hi, *p++ = t ) { DMA( a, v[i], c, hi, t, not_used ); } + for ( ; i < lv; i++, c = hi, *p++ = t ) { DMA( a, v[i], c, hi, t ); } if ( c == 0 ) return( i + 1 ); *p = c; return( i + 2 ); } else { for ( lsh = BSH - rsh; i < lv; i++, c = hi, t = w >> rsh ) { - DMA( a, v[i], c, hi, w, not_used ); + DMA( a, v[i], c, hi, w ); +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (w << lsh); +#else *p++ = t | ((w << lsh) & BMASK); +#endif } if ( c != 0 ) { +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (c << lsh); +#else *p++ = t | ((c << lsh) & BMASK); +#endif i++; t = c >> rsh; } @@ -247,16 +359,22 @@ int *u, lu, a, *v, lv, *ans; *p = c; return 1; } - t = u[i++] - c; + t = u[i++]; if ( i >= lu ) { - if ( t == 0 ) return 0; - c = t < 0 ? -t : t; + if ( t == c ) return 0; + c = t < c ? c - t : t - c; goto c_sh; - } else if ( t == 0 ) { + } else if ( t == c ) { while ( (t = u[i++]) == 0 ) ; c = 0; - } else if ( t < 0 ) t += BASE, c = 1; - else c = 0; + } else if ( t < c ) { +#if BSH == BIT_WIDTH_OF_INT + t = t - c; +#else + t = t + (BASE - c); +#endif + c = 1; + } else { t -= c; c = 0; } /* diff turned out to be > 0 */ u += i, lu -= i; TRAILINGZEROS( t, rsh ); @@ -274,33 +392,31 @@ int *u, lu, a, *v, lv, *ans; lsh = BSH - rsh; if ( c != 0 ) { /* there still exists u[] elms.'s because diff is known to be > 0 */ if ( (w = u[i++]) == 0 ) { +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (BMask << lsh); +#else *p++ = t | ((BMASK << lsh) & BMASK); +#endif for ( ; (w = u[i++]) == 0; *p++ = BMASK ) ; t = BMASK >> rsh; } w--; +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (w << lsh); +#else *p++ = t | ((w << lsh) & BMASK); +#endif t = w >> rsh; } +#if BSH == BIT_WIDTH_OF_INT + for ( ; i < lu; i++, t = w >> rsh ) *p++ = t | ((w = u[i]) << lsh); +#else for ( ; i < lu; i++, t = w >> rsh ) *p++ = t | (((w = u[i]) << lsh) & BMASK); +#endif if ( t == 0 ) return( i ); *p = t; } return( i + 1 ); - /**/ - non0w: - u += i, lu -= i, v += i, lv -= i; - /* | t + BASE*(c + a*v[0:lv-1] - u[0:lu-1] | */ - if ( lv < lu ) { /* a*V < U if lv U if lv>lu, and very likely even if lv==lu */ - if ( t < 0 ) t += BASE, c--; - TRAILINGZEROS( t, rsh ); - return( rsh == 0 ? (lv < lu ? abs_U_aV_c( t, u, lu, a, v, lv, c, ans ) : - abs_aVplusc_U( t, a, v, lv, c, u, lu, ans )) : - lv < lu ? abs_U_aV_c_sh( t, u, lu, a, v, lv, c, rsh, ans ) : - abs_aVplusc_U_sh( t, a, v, lv, c, u, lu, rsh, ans ) ); } /*********/ @@ -314,7 +430,7 @@ int a, *v, lv, c, *p; int i, t; int hi; - for ( i = 0; i < lv; i++, *p++ = t, c = hi ) { DMA( a, v[i], c, hi, t, not_used); } + for ( i = 0; i < lv; i++, *p++ = t, c = hi ) { DMA( a, v[i], c, hi, t ); } if ( c == 0 ) return i; *p = c; return( i + 1 ); @@ -330,11 +446,19 @@ int a, *v, lv, c, rsh, *p; int hi; for ( i = 0; i < lv; i++, c = hi, t = w >> rsh ) { - DMA( a, v[i], c, hi, w, not_used ); + DMA( a, v[i], c, hi, w ); +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (w << lsh); +#else *p++ = t | ((w << lsh) & BMASK); +#endif } if ( c != 0 ) { +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (c << lsh); +#else *p++ = t | ((c << lsh) & BMASK); +#endif i++; t = c >> rsh; } @@ -345,34 +469,49 @@ int a, *v, lv, c, rsh, *p; /*********/ -static int abs_aVplusc_U( t, a, v, lv, c, u, lu, ans ) -int t, a, *v, lv, c, *u, lu, *ans; +static int abs_aVplusc_U( t, a, v, lv, c, b, u, lu, ans ) +#if BSH == BIT_WIDTH_OF_INT +unsigned +#endif +int t, a, *v, lv, c, b, *u, lu, *ans; /* compute | t + BASE*(a*V+c - U) | in ans[], where V=v[0:lv-1], U=u[0:lu-1], * and a > 1, -1 <= c < BASE, lv >= lu >=0 && t != 0 are assumed. */ { - int i, l, b, *p = ans; - int hi; +#if BSH == BIT_WIDTH_OF_INT + unsigned +#endif + int i, l, *p = ans, hi, w; *p++ = t, l = 1; - if ( c < 0 ) c = 0, b = 1; - else b = 0; for ( i = 0; i < lu; *p++ = t ) { - DMA( a, v[i], c, hi, t, not_used ); - t -= u[i++], c = hi; - if ( b != 0 ) t--; - b = 0; - if ( t > 0 ) l = i + 1; - else if ( t < 0 ) { - t += BASE, l = i + 1; - if ( c != 0 ) c--; + DMA( a, v[i], c, hi, t ); + c = hi; + if ( t > (w = u[i++]) ) { + t = (t - w) - b; + b = 0; + } else if ( t < w ) { + t = (t - w) - b; +#if BSH != BIT_WIDTH_OF_INT + t += BASE; +#endif + if ( c != 0 ) c--, b = 0; else b = 1; + } else if ( b == 0 ) t = 0; + else { + t = BMASK; + if ( c != 0 ) c--, b = 0; } + if ( t != 0 ) l = i + 1; } /* at this point, i == lu and we have written (i+1) entries in ans[] */ if ( i >= lv ) { /* no more elms in v[] */ if ( b != 0 ) { +#if BSH == BIT_WIDTH_OF_INT + if ( i == 0 ) { ans[i] = - t; return 1; } +#else if ( i == 0 ) { ans[i] = BASE - t; return 1; } +#endif l = negate_nbd( ans, i ); /* <================ */ /* if ( (t = BMASK ^ ans[i]) == 0 ) return l;*/ if ( (t ^= BMASK) == 0 ) return l; @@ -389,43 +528,62 @@ int t, a, *v, lv, c, *u, lu, *ans; DM( a, b, hi, t ); if ( t != 0 ) t--, c = hi; else t = BMASK, c = hi - 1; - *p++ - t; + *p++ = t; } #ifdef CALL return( aV_plus_c( a, &v[i], lv - i, c, p ) + i +1 ); #else - for ( ; i < lv; i++, *p++ = t, c = hi ) { DMA( a, v[i], c, hi, t, not_used );} + for ( ; i < lv; i++, *p++ = t, c = hi ) { DMA( a, v[i], c, hi, t ); } if ( c == 0 ) return( i + 1 ); *p = c; return( i + 2 ); #endif } -static int abs_aVplusc_U_sh( t, a, v, lv, c, u, lu, rsh, ans ) -int t, a, *v, lv, c, *u, lu, rsh, *ans; +static int abs_aVplusc_U_sh( t, a, v, lv, c, b, u, lu, rsh, ans ) +#if BSH == BIT_WIDTH_OF_INT +unsigned +#endif +int t, a, *v, lv, c, b, *u, lu, rsh, *ans; { - int i, l, w, b, lsh = BSH - rsh, *p = ans; - int hi; +#if BSH == BIT_WIDTH_OF_INT + unsigned +#endif + int i, l, w, lsh = BSH - rsh, *p = ans, hi, x; - if ( c < 0 ) c = 0, b = 1; - else b = 0; for ( i = 0; i < lu; t = w >> rsh ) { - DMA( a, v[i], c, hi, w, not_used ); - w -= u[i++], c = hi; - if ( b != 0 ) w--; - b = 0; - if ( w < 0 ) { + DMA( a, v[i], c, hi, w ); + c = hi; + if ( w > (x = u[i++]) ) { + w = (w - x) - b; + b = 0; + } else if ( w < x ) { + w = (w - x) - b; +#if BSH != BIT_WIDTH_OF_INT w += BASE; - if ( c != 0 ) c--; +#endif + if ( c != 0 ) c--, b = 0; else b = 1; + } else if ( b == 0 ) w = 0; + else { + w = BMASK; + if ( c != 0 ) c--, b = 0; } +#if BSH == BIT_WIDTH_OF_INT + if ( (*p++ = t | (w << lsh)) != 0 ) l = i; +#else if ( (*p++ = t | ((w << lsh) & BMASK)) != 0 ) l = i; +#endif } /* at this point, i == lu and we have written i entries in ans[] */ if ( i >= lv ) { if ( b != 0 ) { /* diff turned out to be < 0 */ if ( i == 0 ) { +#if BSH == BIT_WIDTH_OF_INT + *p = (1 << lsh) - t; +#else *p = (BASE >> rsh) - t; +#endif return 1; } l = negate_nbd( ans, i ); /* <================ */ @@ -438,7 +596,11 @@ int t, a, *v, lv, c, *u, lu, rsh, *ans; *p = t; return( i + 1 ); } +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (c << lsh); +#else *p++ = t | ((c << lsh) & BMASK); +#endif if ( (t = c >> rsh) == 0 ) return( i + 1 ); *p = t; return( i + 2 ); @@ -446,14 +608,22 @@ int t, a, *v, lv, c, *u, lu, rsh, *ans; /* lv >= lu+1 = i+1, and diff is > 0 */ if ( b != 0 ) { /* c == 0 */ if ( (w = v[i++]) == 0 ) { +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (BMASK << lsh); +#else *p++ = t | ((BMASK << lsh) & BMASK); +#endif while ( (w = v[i++]) == 0 ) *p++ = BMASK; t = BMASK >> rsh; } else { DM( a, w, c, b ); if ( b != 0 ) b--; else b = BMASK, c--; +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (b << lsh); +#else *p++ = t | ((b << lsh) & BMASK); +#endif t = b >> rsh; } } @@ -462,11 +632,19 @@ int t, a, *v, lv, c, *u, lu, rsh, *ans; return( aV_plus_c_sh( a, &v[i], lv - i, c, rsh, t, p ) + i ); #else for ( ; i < lv; i++, t = w >> rsh, c = hi ) { - DMA( a, v[i], c, hi, w, not_used ); + DMA( a, v[i], c, hi, w ); +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (w << lsh); +#else *p++ = t | ((w << lsh) & BMASK); +#endif } if ( c != 0 ) { +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (c << lsh); +#else *p++ = t | ((c << lsh) & BMASK); +#endif i++, t = c >> rsh; } if ( t == 0 ) return i; @@ -478,43 +656,73 @@ int t, a, *v, lv, c, *u, lu, rsh, *ans; /*********/ static int abs_U_aV_c( t, u, lu, a, v, lv, c, ans ) +#if BSH == BIT_WIDTH_OF_INT +unsigned +#endif int t, *u, lu, a, *v, lv, c, *ans; /* compute | t + BASE*(U - a*V - c) | in ans[], where U = u[0:lu-1], V = v[0:lv-1], * c is <= BASE-1, and lu >= lv+1 && t != 0 assumed. */ { - int i, w, l, *p = ans; - int hi; +#if BSH == BIT_WIDTH_OF_INT + unsigned +#endif + int i, w, l, *p = ans, hi, b; - *p++ = t, l = 1; + *p++ = t, l = 1, b = 0; for ( i = 0; i < lv; *p++ = t ) { - DMA( a, v[i], c, hi, w, not_used ); - t = u[i] - w; - i++, c = hi; + DMA( a, v[i], c, hi, w ); + c = hi; + if ( (t = u[i++]) > w ) { + t = (t - w) - b; + b = 0; + } else if ( t == w && b == 0 ) { + t = 0; + continue; + } else { + t = (t - w) - b; +#if BSH != BIT_WIDTH_OF_INT + t += BASE; +#endif + if ( c == BMASK ) b = 1; + else b = 0, c++; + } if ( t != 0 ) l = i + 1; - if ( t < 0 ) t += BASE, c++; } /* at this point, i == lv */ if ( lu == lv+1 ) { - if ( (t = u[i]) == c ) return l; + t = u[i] - b; + if ( t == c ) return l; else if ( t > c ) { *p = t - c; return( lu + 1 ); } l = negate_nbd( ans, lu ); /* <================ */ if ( (c -= (t + 1)) == 0 ) return l; *p = c; return( lu + 1 ); } - /* lu >= lv+2 and the diff turned out to be >= 0 */ + /* lu >= lv+2 and therfore, the diff turned out to be >= 0 */ if ( c != 0 ) { - /* note c <= BASE. If c == BASE, we must care about the length of the result + /* note c+b <= BASE. If c == BASE, we must care about the length of the result of the case when lu == lv+2 && u[lu-2:lu-1]=u[i:i+1] == BASE */ - if ( c >= BASE && i+2 == lu && u[i+1] == 1 ) { - /* m.s. word of the diff becomes 0 */ - if ( (t = u[i] - (c & BMASK)) == 0 ) return l; - *p = t; - return lu; + if ( /* c == BMASK && */ b != 0 ) { + if ( i+2 == lu && u[i+1] == 1 ) { + /* m.s. word of the diff becomes 0 */ + if ( (t = u[i]) == 0 ) return l; + *p = t; + return lu; + } + *p++ = u[i++]; + c = 1; } +#if BSH == BIT_WIDTH_OF_INT + do { + if ( (t = u[i++]) >= c ) break; + else *p++ = t - c; + } while ( c = 1 ); + if ( (t -= c) == 0 && i >= lu ) return lu; +#else for ( ; 1; c = 1, *p++ = t + BASE ) if ( (t = u[i++] - c) >= 0 ) break; if ( t == 0 && i >= lu ) return lu; +#endif *p++ = t; } for ( ; i < lu; i++ ) *p++ = u[i]; @@ -522,35 +730,66 @@ int t, *u, lu, a, *v, lv, c, *ans; } static int abs_U_aV_c_sh( t, u, lu, a, v, lv, c, rsh, ans ) +#if BSH == BIT_WIDTH_OF_INT +unsigned +#endif int t, *u, lu, a, *v, lv, c, rsh, *ans; /* r-shift version of the above */ { - int i, w, l, lsh = BSH - rsh, *p = ans; - int hi; +#if BSH == BIT_WIDTH_OF_INT + unsigned +#endif + int i, w, l, lsh = BSH - rsh, *p = ans, hi, b, x; - for ( l = i = 0; i < lv; t = w >> rsh ) { - DMA( a, v[i], c, hi, w, not_used ); - w = u[i] - w, c = hi; - i++; - if ( w < 0 ) w += BASE, c++; - if ( (*p++ = t | ((w << lsh) & BMASK)) != 0 ) l = i; + for ( b = l = i = 0; i < lv; t = w >> rsh ) { + DMA( a, v[i], c, hi, w ); + c = hi; + if ( (x = u[i++]) > w ) { + w = (x - w) - b; + b = 0; + } else if ( x == w && b == 0 ) w = 0; + else { + w = (x - w) - b; +#if BSH != BIT_WIDTH_OF_INT + w += BASE; +#endif + if ( c == BMASK ) b = 1; + else b = 0, c++; + } +#if BSH == BIT_WIDTH_OF_INT + x = t | (w << lsh); +#else + x = t | ((w << lsh) & BMASK); +#endif + if ( (*p++ = x) != 0 ) l = i; } /* at this point, i == lv, and we have written lv elm.s in ans[] */ if ( lu == lv+1 ) { - if ( (w = u[i] - c) == 0 ) { + x = u[i] - b; + if ( x == c ) { if ( t == 0 ) return l; *p = t; return lu; /* == lv+1 */ - } else if ( w > 0 ) { - l0: *p++ = t | ((w << lsh) & BMASK); + } else if ( x > c ) { + w = x - c; + l0: +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (w << lsh); +#else + *p++ = t | ((w << lsh) & BMASK); +#endif if ( (w >>= rsh) == 0 ) return lu; /* == lv+1 */ *p = w; return( lu + 1 ); } /* diff turned out to be < 0 */ - w = - w - 1; + w = c - x - 1; if ( lv == 0 ) { /* lu == 1 */ +#if BSH == BIT_WIDTH_OF_INT + t = (1 << lsh) - t; +#else t = (BASE >> rsh) - t; +#endif if ( w != 0 ) goto l0; *p = t; return 1; @@ -566,14 +805,32 @@ int t, *u, lu, a, *v, lv, c, rsh, *ans; if ( c != 0 ) { /* note c <= BASE. If c == BASE, we must care about the length of the result of the case when lu == lv+2 && u[lu-2:lu-1]=u[i:i+1] == BASE */ - if ( c >= BASE && i+2 == lu && t == 0 && u[i] == 0 && u[i+1] == 1 ) - return l; /* m.s. word of the diff has become 0 */ + if ( /* c == BMASK && */ b != 0 ) { + if ( i+2 == lu && u[i+1] == 1 && t == 0 && u[i] == 0 ) + return l; /* m.s. word of the diff has become 0 */ + w = u[i++]; +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (w << lsh); +#else + *p++ = t | ((w << lsh) & BMASK); +#endif + c = 1, t = w >> rsh; + } for ( ; 1; t = w >> rsh, c = 1 ) { - if ( (w = u[i++] - c) >= 0 ) break; + w = (x = u[i++]) - c; + if ( x >= c ) break; +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (w << lsh); +#else w += BASE; *p++ = t | ((w << lsh) & BMASK); +#endif } +#if BSH == BIT_WIDTH_OF_INT + t |= (w << lsh); +#else t |= ((w << lsh) & BMASK); +#endif w >>= rsh; if ( i >= lu ) { if ( w != 0 ) { @@ -586,134 +843,32 @@ int t, *u, lu, a, *v, lv, c, rsh, *ans; *p++ = t; t = w; } +#if BSH == BIT_WIDTH_OF_INT + for ( ; i < lu; i++, t = w >> rsh ) *p++ = t | ((w = u[i]) << lsh); +#else for ( ; i < lu; i++, t = w >> rsh ) *p++ = t | (((w = u[i]) << lsh) & BMASK); +#endif if ( t == 0 ) return i; *p = t; return( i + 1 ); } -/****************/ -/****************/ -#ifdef FULLSET -static int abs_axU_V_maxrshift(), abs_axU_bxV_maxrshift(); - -static int abs_aU_bV_maxrshift( a, u, lu, b, v, lv, ans ) -int a, *u, lu, b, *v, lv, *ans; - /* - * Compute | a*U - b*V | >> (as much as possible) in ans[], where U=u[0:lu-1] - * and V=v[0:lv-1]. - */ -{ - if ( a == 1 ) return abs_U_aV_maxrshift( u, lu, b, v, lv, ans ); - else if ( b == 1 ) return abs_U_aV_maxrshift( v, lv, a, u, lu, ans ); - else if ( a == b ) return abs_axU_V_maxrshift( a, u, lu, v, lv, ans ); - return abs_axU_bxV_maxrshift( a, u, lu, b, v, lv, ans ); -} - -static int abs_axU_V_maxrshift( a, u, lu, v, lv, ans ) -int a, *u, lu, *v, lv, *ans; - /* - * Compute a*| U - V | >> (as much as possible) in ans[], where U=u[0:lu-1] - * and V=v[0:lv-1], 0 < a < 2^BASE. - */ -{ - int i, l, b, c, t, rsh, *p = ans, lsh, w, x; - int hi; - - if ( lu > lv ) goto U_V; - else if ( lu < lv ) goto swap; - else { - for ( i = lu; i-- > 0; ) { - if ( u[i] == v[i] ) continue; - lu = lv = i + 1; - if ( u[i] > v[i] ) goto U_V; - else goto swap; - } - return 0; - } - swap: - SWAP( lu, lv, int ); SWAP( u, v, int * ); - U_V: - for ( b = c = i = 0; i < lv; ) { - if ( (w = u[i] - v[i] - b) < 0 ) w += BASE, b = 1; - else b = 0; - DMA( a, w, c, hi, t, not_used ); - i++, c = hi; - if ( t != 0 ) goto non0w; - } - while ( i < lu ) { - if ( (w = u[i] - b) < 0 ) w += BASE, b = 1; - else b = 0; - DMA( a, w, c, hi, t, not_used ); - i++, c = hi; - if ( t != 0 ) goto non0w; - } - if ( b != 0 ) c -= a; - else if ( c == 0 ) return 0; - while ( (c&1) == 0 ) c >>= 1; - *p = c; - return 1; - /**/ - non0w: - u += i, lu -= i, v += i, lv -= i; - TRAILINGZEROS( t, rsh ); - i = 0; - if ( rsh == 0 ) { - *p++ = t, l = 0; - for ( ; i < lv; c = hi ) { - if ( (w = u[i] - v[i] - b) < 0 ) w += BASE, b = 1; - else b = 0; - DMA( a, w, c, hi, t, not_used ); - i++; - if ( (*p++ = t) != 0 ) l = i; - } - for ( ; i < lu; c = hi ) { - if ( (w = u[i] - b) < 0 ) w += BASE, b = 1; - else b = 1; - DMA( a, w, c, hi, t, not_used ); - i++; - if ( (*p++ = t) != 0 ) l = i; - } - if ( b != 0 ) c -= a; - if ( c == 0 ) return( l + 1 ); - *p = c; - return( i + 2 ); - } else { - for ( lsh = BSH - rsh, l = 0; i < lv; c = hi, t = x >> rsh ) { - if ( (w = u[i] - v[i] - b) < 0 ) w += BASE, b = 1; - else b = 0; - DMA( a, w, c, hi, x, not_used ); - i++; - if ( (*p++ = t | ((x << lsh) & BMASK)) != 0 ) l = i; - } - for ( ; i < lu; i++, c = hi, t = x >> rsh ) { - if ( (w = u[i] - b) < 0 ) w += BASE, b = 1; - else b = 0; - DMA( a, w, c, hi, x, not_used ); - i++; - if ( (*p++ = t | ((x << lsh) & BMASK)) != 0 ) l = i; - } - if ( b != 0 ) c -= a; - if ( c != 0 ) { - *p++ = t | ((c << lsh) & BMASK); - i++, t = c >> rsh; - } else if ( t == 0 ) return l; - if ( t == 0 ) return( i ); - *p = t; - return( i + 1 ); - } -} -#endif /* FULLSET */ - +/****************//****************//****************//****************/ +/****************//****************//****************//****************/ static int abs_axU_bxV_maxrshift( a, u, lu, b, v, lv, ans ) +#if BSH == BIT_WIDTH_OF_INT +unsigned +#endif int a, *u, lu, b, *v, lv, *ans; /* * Compute | a*U - b*V | >> (as much as possible) in ans[], where U=u[0:lu-1] * and V=v[0:lv-1], 0 < a, b < 2^BASE. */ { - int i, l, c, d, s, t, w, rsh, *p = ans, lsh; - int hi; +#if BSH == BIT_WIDTH_OF_INT + unsigned +#endif + int i, l, c, d, s, t, w, rsh, *p = ans, lsh, hi; static int bw_int32(); BitWidth( a, c ); BitWidth( u[lu -1], s ); @@ -722,22 +877,26 @@ int a, *u, lu, b, *v, lv, *ans; SWAP( a, b, int ); SWAP( lu, lv, int ); SWAP( u, v, int * ); } for ( i = c = d = 0; i < lv; ) { - DMA( a, u[i], c, hi, t, not_used ); /* 0 <= c <= 2^BSH -2 */ - c = hi; - DMA( b, v[i], d, hi, s, not_used ); /* 0 <= d <= 2^BSH -1 */ - i++, d = hi; - if ( (t -= s) == 0 ) continue; - else if ( t < 0 ) { + DMA( a, u[i], c, hi, t ); /* 0 <= c <= 2^BSH -2 */ c = hi; + DMA( b, v[i], d, hi, s ); /* 0 <= d <= 2^BSH -1 */ d = hi; + i++; + if ( t == s ) continue; + else if ( t > s ) t -= s; + else { + t -= s; +#if BSH != BIT_WIDTH_OF_INT t += BASE; +#endif if ( c != 0 ) c--; else d++; } goto non0w; } + /******/ if ( i >= lu ) { /* no more elm.'s in u[] and v[] */ only_c: - if ( (c -= d) == 0 ) return 0; - else if ( c < 0 ) c = -c; + if ( c == d ) return 0; + c = c > d ? c - d : d - c; sh_onlyc: /* TRAILINGZEROS( c, rsh ); */ while ( (c&1) == 0 ) c >>= 1; @@ -745,26 +904,43 @@ int a, *u, lu, b, *v, lv, *ans; return 1; } /* there is at least one more elm. in u[] */ - DMA( a, u[i], c, hi, t, not_used ); + DMA( a, u[i], c, hi, t ); i++, c = hi; if ( i >= lu ) { /* in this case, diff still can be <= 0 */ if ( hi == 0 ) { c = t; goto only_c; } - if ( (t -= d) == 0 ) { c = hi; goto sh_onlyc; } - else if ( t < 0 ) t += BASE, hi--; + if ( t == d ) { c = hi; goto sh_onlyc; } + else if ( t > d ) t -= d; + else { + t -= d, hi--; +#if BSH != BIT_WIDTH_OF_INT + t += BASE; +#endif + } TRAILINGZEROS( t, rsh ); if ( rsh == 0 ) *p++ = t; else { +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (hi << (BSH - rsh)); +#else *p++ = t | ((hi << (BSH - rsh)) & BMASK); +#endif hi >>= rsh; } if ( hi == 0 ) return 1; *p = hi; return 2; - } /* diff turned out to be > 0 */ else if ( (t -= d) > 0 ) d = 0; - else if ( t < 0 ) t += BASE, d = 1; - else { + } /* diff turned out to be > 0 */ else if ( t > d ) { + t -= d; + d = 0; + } else if ( t < d ) { + t -= d; +#if BSH != BIT_WIDTH_OF_INT + t += BASE; +#endif + d = 1; + } else { while ( i < lu ) { - DMA( a, u[i], c, hi, t, not_used ); + DMA( a, u[i], c, hi, t ); i++, c = hi; if ( t != 0 ) break; } @@ -776,7 +952,7 @@ int a, *u, lu, b, *v, lv, *ans; *p++ = t; goto no_more_v; } else goto no_more_v_sh; - /**/ + /******/ non0w: u += i, lu -= i, v += i, lv -= i; TRAILINGZEROS( t, rsh ); @@ -784,13 +960,16 @@ int a, *u, lu, b, *v, lv, *ans; if ( rsh == 0 ) { *p++ = t, l = 0; for ( ; i < lv; *p++ = t ) { - DMA( a, u[i], c, hi, t, not_used ); - c = hi; - DMA( b, v[i], d, hi, s, not_used ); - i++, d = hi; - if ( (t -= s) == 0 ) continue; - else if ( t < 0 ) { + DMA( a, u[i], c, hi, t ); c = hi; + DMA( b, v[i], d, hi, s ); d = hi; + i++; + if ( t == s ) continue; + else if ( t > s ) t -= s; + else { + t -= s; +#if BSH != BIT_WIDTH_OF_INT t += BASE; +#endif if ( c != 0 ) c--; else d++; } @@ -799,10 +978,11 @@ int a, *u, lu, b, *v, lv, *ans; no_more_v: if ( i >= lu ) { final_c_d: - if ( (c -= d) == 0 ) return( l + 1 ); - else if ( c < 0 ) { + if ( c == d ) return( l + 1 ); + else if ( c > d ) c -= d; + else { l = negate_nbd( ans, i + 1 ); /* <================ */ - if ( (c = -c - 1) == 0 ) return l; + if ( (c = d-c - 1) == 0 ) return l; } *p = c; return( i + 2 ); @@ -810,22 +990,33 @@ int a, *u, lu, b, *v, lv, *ans; /* a*u[i:lu-1] + c - d */ if ( c >= d ) c -= d; else { - DMA( a, u[i], c, hi, t, not_used ); + DMA( a, u[i], c, hi, t ); if ( i+1 >= lu ) { if ( hi == 0 ) { c = t; goto final_c_d; } - if ( (t -= d) < 0 ) t += BASE, c = hi - 1; - else c = hi; + c = hi; + if ( t >= d ) t -= d; + else { + t -= d; +#if BSH != BIT_WIDTH_OF_INT + t += BASE; +#endif + c--; + } i++, *p++ = t; goto final_c; } i++, c = hi; - if ( (t -= d) >= 0 ) *p++ = t; + if ( t >= d ) *p++ = t - d; else { - *p++ = t + BASE; + t -= d; +#if BSH != BIT_WIDTH_OF_INT + t += BASE; +#endif + *p++ = t; if ( c != 0 ) c--; else { for ( ; i < lu; *p++ = BMASK ) { - DMA( a, u[i], c, hi, t, not_used ); + DMA( a, u[i], c, hi, t ); i++, c = hi; if ( t == 0 ) continue; *p++ = t - 1; @@ -838,72 +1029,121 @@ int a, *u, lu, b, *v, lv, *ans; } /*** return( aV_plus_c( a, &u[i], lu - i, c, p ) + i + 1 ); ***/ aU: - for ( ; i < lu; i++, c = hi, *p++ = t ) { DMA( a, u[i], c, hi, t, not_used ); } + for ( ; i < lu; i++, c = hi, *p++ = t ) { DMA( a, u[i], c, hi, t ); } final_c: if ( c == 0 ) return( i + 1 ); *p = c; return( i + 2 ); } else { /* rsh != 0 */ for ( lsh = BSH - rsh; i < lv; t = w >> rsh ) { - DMA( a, u[i], c, hi, w, not_used ); - c = hi; - DMA( b, v[i], d, hi, s, not_used ); - i++, d = hi; - if ( (w -= s) < 0 ) { + DMA( a, u[i], c, hi, w ); c = hi; + DMA( b, v[i], d, hi, s ); d = hi; + i++; + if ( w >= s ) w -= s; + else { + w -= s; +#if BSH != BIT_WIDTH_OF_INT w += BASE; +#endif if ( c != 0 ) c--; else d++; } +#if BSH == BIT_WIDTH_OF_INT + if ( (*p++ = t | (w << lsh)) != 0 ) l = i; +#else if ( (*p++ = t | ((w << lsh) & BMASK)) != 0 ) l = i; +#endif } no_more_v_sh: if ( i >= lu ) { final_c_d_sh: - if ( (c -= d) == 0 ) + if ( c == d ) if ( t == 0 ) return l; else { *p = t; return( i + 1 ); } - else if ( c < 0 ) { + else if ( c > d ) c -= d; + else { +#if BSH == BIT_WIDTH_OF_INT + if ( i == 0 ) t = (1 << lsh) - t; +#else if ( i == 0 ) t = (BASE >> rsh) - t; +#endif else { l = negate_nbd( ans, i ); /* <================ */ /* t = (BASE >> rsh) - t;*/ t ^= ((BMASK >> rsh)); } - c = -c -1; + c = d-c -1; } +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (c << lsh); +#else *p++ = t | ((c << lsh) & BMASK); +#endif if ( (c >>= rsh) == 0 ) return( i + 1 ); *p = c; return( i + 2 ); } else if ( c >= d ) c -= d; else { - DMA( a, u[i], c, hi, w, not_used ); + DMA( a, u[i], c, hi, w ); if ( i+1 >= lu ) { if ( hi == 0 ) { c = w; goto final_c_d_sh; } - if ( (w -= d) < 0 ) w += BASE, c = hi - 1; - else c = hi; + c = hi; + if ( w >= d ) w -= d; + else { + w -= d; +#if BSH != BIT_WIDTH_OF_INT + w += BASE; +#endif + c--; + } +#if BSH == BIT_WIDTH_OF_INT + i++, *p++ = t | (w << lsh); +#else i++, *p++ = t | ((w << lsh) & BMASK); +#endif t = w >> rsh; goto final_c_sh; } i++, c = hi; - if ( (w -= d) >= 0 ) { *p++ = t | ((w << lsh) & BMASK); t = w >> rsh; } - else { + if ( w >= d ) { + w -= d; +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (w << lsh); +#else + *p++ = t | ((w << lsh) & BMASK); +#endif + t = w >> rsh; + } else { + w -= d; +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (w << lsh); +#else w += BASE; *p++ = t | ((w << lsh) & BMASK); +#endif t = w >> rsh; if ( c != 0 ) c--; else { while ( i < lu ) { - DMA( a, u[i], c, hi, w, not_used ); - i++, c = hi; + DMA( a, u[i], c, hi, w ); + c = hi; + i++; if ( w == 0 ) { +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (BMASK << lsh); + t = BMASK >> rsh; +#else *p++ = t | ((BMASK << lsh) & BMASK); t = BMASK >> rsh; +#endif continue; } else { w--; +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (w << lsh); +#else *p++ = t | ((w << lsh) & BMASK); +#endif t = w >> rsh; goto aU_sh; } @@ -916,12 +1156,20 @@ int a, *u, lu, b, *v, lv, *ans; /*** return( aV_plus_c_sh( a, &u[i], lu - i, c, rsh, t ) + i ); ***/ aU_sh: for ( ; i < lu; i++, c = hi, t = w >> rsh ) { - DMA( a, u[i], c, hi, w, not_used ); + DMA( a, u[i], c, hi, w ); +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (w << lsh); +#else *p++ = t | ((w << lsh) & BMASK); +#endif } final_c_sh: if ( c != 0 ) { +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (c << lsh); +#else *p++ = t | ((c << lsh) & BMASK); +#endif i++, t = c >> rsh; } if ( t == 0 ) return i; @@ -931,328 +1179,72 @@ int a, *u, lu, b, *v, lv, *ans; } /****************/ /****************/ -#ifdef FULLSET -static int UplusV_maxrshift(), aUplusV_maxrshift(), axUplusV_maxrshift(), aUplusbV_maxrshift(); -static int aU_plus_bV_maxrshift( a, u, lu, b, v, lv, ans ) +static int aUplusbV_maxrshift( a, u, lu, b, v, lv, ans ) +#if BSH == BIT_WIDTH_OF_INT +unsigned +#endif int a, *u, lu, b, *v, lv, *ans; -{ - if ( a == 1 ) - return( b == 1 ? UplusV_maxrshift( u, lu, v, lv, ans ) : - aUplusV_maxrshift( b, v, lv, u, lu, ans ) ); - else if ( b == 1 ) return aUplusV_maxrshift( a, u, lu, v, lv, ans ); - else if ( a == b ) return axUplusV_maxrshift( a, u, lu, v, lv, ans ); - return aUplusbV_maxrshift( a, u, lu, b, v, lv, ans ); -} - -static int UplusV_maxrshift( u, lu, v, lv, ans ) -int *u, lu, *v, lv, *ans; /* - * Compute ( (U + V) >> (as much as possible) ) in ans[], where U=u[0:lu-1], - * V=v[0:lv-1], and 0 < a < BASE. + * Compute ( (a*U + b*V) >> (as much as possible) ) in ans[], where U=u[0:lu-1], + * V=v[0:lv-1], and 0 < a,b < BASE. */ { - int i, t, c, rsh, *p = ans; - int hi; +#if BSH == BIT_WIDTH_OF_INT + unsigned +#endif + int i, c, d, s, t, w, rsh, *p = ans, lsh, hi; - if ( lu < lv ) { SWAP( lu, lv, int ); SWAP( u, v, int * ); } - for ( c = i = 0; i < lv; ) { - t = (c += (u[i] + v[i])) & BMASK; - /* 0 <= c <= 2*(2^BSH -1) + 1 = 2^BSH + (2^BSH -1) */ - i++, c >>= BSH; - if ( t != 0 ) goto non0w; - } - while ( i < lu ) { - t = (c += u[i]) & BMASK; - i++, c >>= BSH; - if ( t != 0 ) goto non0w; - } - *p = c; - return 1; - /**/ - non0w: - u += i, lu -= i, v += i, lv -= i; - TRAILINGZEROS( t, rsh ); - i = 0; - if ( rsh == 0 ) { - *p++ = t; - for ( ; i < lv; i++, c >>= BSH ) *p++ = (c += (u[i] + v[i])) & BMASK; - if ( c != 0 ) { - while ( i < lu ) - if ( (c = u[i++] + 1) >= BASE ) *p++ = c & BMASK; - else { - *p++ = c; - goto cpu; - } - *p = 1; /* == c */ - return( lu + 2 ); - } - cpu: - for ( ; i < lu; i++ ) *p++ = u[i]; - return( lu + 1 ); - } else { - int lsh = BSH - rsh; - - for ( ; i < lv; i++, c >>= BSH ) { - c += (u[i] + v[i]); - *p++ = t | ((c << lsh) & BMASK); - t = (c & BMASK) >> rsh; - } - if ( c != 0 ) { - while ( i < lu ) { - c = u[i++] + 1; - *p++ = t | ((c << lsh) & BMASK); - t = (c & BMASK) >> rsh; - if ( (c >>= BSH) == 0 ) goto cpu_sh; - } - *p = t | (1 << lsh); - return( lu + 1 ); - } - cpu_sh: - for ( ; i < lu; t = c >> rsh ) *p++ = t | (((c = u[i++]) << lsh) & BMASK); - if ( t == 0 ) return( lu ); - *p = t; - return( lu + 1 ); - } -} - -static int aUplusV_maxrshift( a, u, lu, v, lv, ans ) -int a, *u, lu, *v, lv, *ans; - /* - * Compute ( (a*U + V) >> (as much as possible) ) in ans[], where U=u[0:lu-1], - * V=v[0:lv-1], and 1 < a < BASE. - */ -{ - int i, l, t, c, rsh, *p = ans, w, lsh; - int hi; - - for ( l = lu < lv ? lu : lv, c = i = 0; i < l; ) { - /* Note that (carry in a*U[*]) <= 2^BSH-2 because {(2^j-1)}^2 + (2^j-2) - * = 2^j*(2^j -2)+(2^j -1), and the following c is <= 2^j -1 because - * {(2^j -1)}^2 + (2^j -1) + (2^j -1) = 2^j*(2^j -1) + (2^j -1). - * ^^^^^^carry^^^^^^ pv[?]. - */ - c += v[i]; - DMA( a, u[i], c, hi, t, not_used ); - i++, c = hi; - if ( t != 0 ) goto non0sum; - } - if ( i >= lu ) { /* compute (c + v[i:lv-1]) */ - while ( i < lv ) { - t = (c += v[i++]) & BMASK; - c >>= BSH; - if ( t != 0 ) goto non0w_v; - } - *p = 1; - return 1; - non0w_v: - v += i, lv -= i; - i = 0; - TRAILINGZEROS( t, rsh ); - if ( rsh == 0 ) { - *p++ = t; - L_addv: - if ( c != 0 ) { - while ( i < lv ) - if ( (c = u[i++] + 1) >= BASE ) *p++ = c & BMASK; - else { - *p++ = c; - goto cpv; - } - *p = 1; /* == c */ - return( lv + 2 ); - } - cpv: - for ( ; i < lv; i++ ) *p++ = v[i]; - return( lv + 1 ); - } else { - lsh = BSH - rsh; - L_addv_sh: - if ( c != 0 ) { - while ( i < lv ) { - c += v[i++]; - *p++ = t | ((c << lsh) & BMASK); - t = (c & BMASK) >> rsh; - if ( (c >>= BSH) == 0 ) goto cpv_sh; - } - *p = t | (1 << lsh); - return( lv + 1 ); - } - cpv_sh: - for ( ; i < lv; t = c >> rsh ) *p++ = t | (((c = v[i++]) << lsh) & BMASK); - if ( t == 0 ) return( lv ); - *p = t; - return( lv + 1 ); - } - } else { /* i >= lv, and compute (c + a*u[i:lu-1]) */ - while ( i < lu ) { - DMA( a, u[i], c, hi, t, not_used ); - i++, c = hi; - if ( t != 0 ) goto non0w_u; - } - TRAILINGZEROS( c, rsh ); - *p = c; - return 1; - /**/ - non0w_u: - u += i, lu -= i; - TRAILINGZEROS( t, rsh ); - i = 0; - if ( rsh == 0 ) { - *p++ = t; - L_addu: -#ifdef CALL - return( aV_plus_c( a, u, lv, c, p ) + 1 ); + if ( lu < lv ) { SWAP( a, b, int ); SWAP( lu, lv, int ); SWAP( u, v, int * ); } + for ( c = d = i = 0; i < lv; ) { + DMA( a, u[i], c, hi, t ); /* 0 <= c <= 2^BSH -1 */ c = hi; + DMA( b, v[i], d, hi, s ); /* 0 <= d <= 2^BSH -2 */ d = hi; + i++; +#if BSH == BIT_WIDTH_OF_INT + t += s; + if ( t < s ) c++; #else - for ( ; i < lu; i++, *p++ = t, c = hi ) { DMA( a, u[i], c, hi, t, not_used ); } - if ( c == 0 ) return( lu + 1 ); - *p = c; - return( lu + 2 ); + t += s; + if ( t > BMASK ) c++, t &= BMASK; #endif - } else { - lsh = BSH - rsh; - L_addu_sh: -#ifdef CALL - return aV_plus_c_sh( a, u, lu, c, rsh, t, p ); -#else - for ( ; i < lu; i++, c = hi, t = w >> rsh ) { - DMA( a, u[i], c, hi, w, not_used ); - *p++ = t | ((w << lsh) & BMASK); - } - if ( c != 0 ) { - *p++ = t | ((c << lsh) & BMASK); - i++, t = c >> rsh; - } - if ( t == 0 ) return i; - *p = t; - return( i + 1 ); -#endif - } - } - /**/ - non0sum: - u += i, lu -= i, v += i, lv -= i, l -= i; - TRAILINGZEROS( t, rsh ); - i = 0; - if ( rsh == 0 ) { - *p++ = t; - for ( ; i < l; i++, *p++ = t, c = hi ) { - c += v[i]; - DMA( a, u[i], c, hi, t, not_used ); - } - if ( i >= lu ) /* compute (c + v[i:lv-1]). note i may be >= lv */ goto L_addv; - else /* i >= lv, and compute (c + u[i:lu-1]) */ goto L_addu; - } else { - lsh = BSH - rsh; - for ( ; i < l; i++, c = hi, t = w >> rsh ) { - c += v[i]; - DMA( a, u[i], c, hi, w, not_used ); - *p++ = t | ((w << lsh) & BMASK); - } - if ( i >= lu ) /* compute (c + v[i:lv-1]) >> rsh. note i may be >= lv */ goto L_addv_sh; - else /* i >= lv, and compute (c + u[i:lu-1]) >> rsh */ goto L_addu_sh; - } -} - - -static int axUplusV_maxrshift( a, u, lu, v, lv, ans ) -int a, *u, lu, *v, lv, *ans; - /* - * Compute ( a*(U + V) >> (as much as possible) ) in ans[], where U=u[0:lu-1], - * V=v[0:lv-1], and 1 < a < BASE. - */ -{ - int i, t, c, d, rsh, w, *p = ans, lsh, x; - int hi; - - if ( lu < lv ) { SWAP( lu, lv, int ); SWAP( u, v, int * ); } - for ( i = c = d = 0; i < lv; ) { - w = (d += (u[i] + v[i])) & BMASK; - DMA( a, w, c, hi, t, not_used ); - i++, d >>= BSH, c = hi; if ( t != 0 ) goto non0w; } - while ( i < lu ) { - w = (d += u[i++]) & BMASK; - DMA( a, w, c, hi, t, not_used ); - d >>= BSH, c = hi; - if ( t != 0 ) goto non0w; +#if BSH == BIT_WIDTH_OF_INT + c += d; + if ( c < d ) { /* overflow, and c can never be >= 2^BSH - 1 */ + if ( i >= lu ) { d = 1; goto only_cd; } + DMA( a, u[i], c, hi, t ); + c = hi + 1; + i++; + if ( t != 0 ) goto non0t_u; } - if ( d != 0 ) c += a; + for ( d = 0; i < lu; ) { + DMA( a, u[i], c, hi, t ); + c = hi; + i++; + if ( t != 0 ) goto non0t_u; + } + only_cd: TRAILINGZEROS( c, rsh ); - if ( rsh != 0 || c <= BMASK ) { *p = c; return 1; } - *p++ = c & BMASK; - *p = c >> BSH; - return 2; + if ( d != 0 ) + if ( rsh == 0 ) { *p++ = c; *p = 1; return 2; } + else c |= (1 << (BSH - rsh)); + *p = c; + return 1; /**/ - non0w: - u += i, lu -= i, v += i, lv -= i; +non0t_u: TRAILINGZEROS( t, rsh ); + u += i, lu -= i; i = 0; - if ( rsh == 0 ) { - *p++ = t; - for ( ; i < lv; i++, d >>= BSH, *p++ = t, c = hi ) { - w = (d += (u[i] + v[i])) & BMASK; - DMA( a, w, c, hi, t, not_used ); - } - for ( ; i < lu; d >>= BSH, *p++ = t, c = hi ) { - w = (d += u[i++]) & BMASK; - DMA( a, w, c, hi, t, not_used ); - } - if ( d != 0 ) c += a; - if ( c == 0 ) return( lu + 1 ); - *p++ = c & BMASK; - if ( (c >>= BSH) == 0 ) return( lu + 2 ); - *p = c; - return( lu + 3 ); - } else { - for ( lsh = BSH - rsh; i < lv; i++, d >>= BSH, t = x >> rsh, c = hi ) { - w = (d += (u[i] + v[i])) & BMASK; - DMA( a, w, c, hi, x, not_used ); - *p++ = t | ((x << lsh) & BMASK); - } - for ( ; i < lu; d >>= BSH, t = x >> rsh, c = hi ) { - w = (d += u[i++]) & BMASK; - DMA( a, w, c, hi, x, not_used ); - *p++ = t | ((x << lsh) & BMASK); - } - if ( d != 0 ) c += a; - t |= ((c << lsh) & BMASK); - c >>= rsh; - if ( c != 0 ) { - *p++ = t; - *p = c; - return( lu + 2 ); - } else if ( t == 0 ) return lu; - *p = t; - return( lu + 1 ); - } -} -#endif /* FULLSET */ - -static int aUplusbV_maxrshift( a, u, lu, b, v, lv, ans ) -int a, *u, lu, b, *v, lv, *ans; - /* - * Compute ( (a*U + b*V) >> (as much as possible) ) in ans[], where U=u[0:lu-1], - * V=v[0:lv-1], and 0 < a,b < BASE. - */ -{ - int i, c, d, s, t, w, rsh, *p = ans, lsh; - int hi; - - if ( lu < lv ) { SWAP( a, b, int ); SWAP( lu, lv, int ); SWAP( u, v, int * ); } - for ( c = d = i = 0; i < lv; ) { - DMA( a, u[i], c, hi, t, not_used ); /* 0 <= c <= 2^BSH -1 */ - c = hi; - DMA( b, v[i], d, hi, s, not_used ); /* 0 <= d <= 2^BSH -2 */ - i++, d = hi, t += s; - if ( t > BMASK ) c++, t &= BMASK; - if ( t != 0 ) goto non0w; - } + if ( rsh == 0 ) { *p++ = t; goto u_rest; } + lsh = BSH - rsh; + goto u_rest_sh; +#else c += d; for ( d = 0; i < lu; ) { - DMA( a, u[i], c, hi, t, not_used ); - i++, c = hi; + DMA( a, u[i], c, hi, t ); + c = hi; + i++; if ( t != 0 ) goto non0w; } TRAILINGZEROS( c, rsh ); @@ -1260,6 +1252,7 @@ int a, *u, lu, b, *v, lv, *ans; *p++ = c & BMASK; *p = 1; return 2; +#endif /**/ non0w: u += i, lu -= i, v += i, lv -= i; @@ -1268,41 +1261,92 @@ int a, *u, lu, b, *v, lv, *ans; if ( rsh == 0 ) { *p++ = t; for ( ; i < lv; i++, *p++ = t ) { - DMA( a, u[i], c, hi, t, not_used ); - c = hi; - DMA( b, v[i], d, hi, s, not_used ); - d = hi, t += s; + DMA( a, u[i], c, hi, t ); c = hi; + DMA( b, v[i], d, hi, s ); d = hi; + t += s; +#if BSH == BIT_WIDTH_OF_INT + if ( t < s ) c++; +#else if ( t > BMASK ) c++, t &= BMASK; +#endif } c += d; +#if BSH == BIT_WIDTH_OF_INT + if ( c < d ) { + if ( i >= lu ) { *p++ = c; *p = 1; return( lu + 3 ); } + DMA( a, u[i], c, hi, t ); + c = hi + 1; + i++; + *p++ = t; + } +u_rest: for ( ; i < lu; i++, *p++ = t, c = hi ) { - DMA( a, u[i], c, hi, t, not_used ); + DMA( a, u[i], c, hi, t ); } if ( c == 0 ) return( lu + 1 ); + *p = c; + return( lu + 2 ); +#else +u_rest: + for ( ; i < lu; i++, *p++ = t, c = hi ) { + DMA( a, u[i], c, hi, t ); + } + if ( c == 0 ) return( lu + 1 ); else if ( c <= BMASK ) { *p = c; return( lu + 2 ); } *p++ = c & BMASK; *p = 1; return( lu + 3 ); +#endif } else { for ( lsh = BSH - rsh; i < lv; i++, t = w >> rsh ) { - DMA( a, u[i], c, hi, w, not_used ); - c = hi; - DMA( b, v[i], d, hi, s, not_used ); - d = hi, w += s; + DMA( a, u[i], c, hi, w ); c = hi; + DMA( b, v[i], d, hi, s ); d = hi; + w += s; +#if BSH == BIT_WIDTH_OF_INT + if ( w < s ) c++; + *p++ = t | (w << lsh); +#else if ( w > BMASK ) c++, w &= BMASK; *p++ = t | ((w << lsh) & BMASK); +#endif } c += d; /* <= 2^BSH + (2^BSH - 3) */ +#if BSH == BIT_WIDTH_OF_INT + if ( c < d ) { + if ( i >= lu ) { + *p++ = t | (c << lsh); + *p = (c >> rsh) | (1 << lsh); + return( lu + 2 ); + } + DMA( a, u[i], c, hi, w ); + c = hi + 1; + i++; + *p++ = t | (w << lsh); + t = w >> rsh; + } + u_rest_sh: + for ( ; i < lu; i++, t = w >> rsh ) { + DMA( a, u[i], c, hi, w ); + c = hi; + *p++ = t | (w << lsh); + } +#else +u_rest_sh: for ( ; i < lu; i++, c = hi, t = w >> rsh ) { - DMA( a, u[i], c, hi, w, not_used ); + DMA( a, u[i], c, hi, w ); *p++ = t | ((w << lsh) & BMASK); } +#endif if ( c == 0 ) { if ( t == 0 ) return lu; *p = t; return( lu + 1 ); } +#if BSH == BIT_WIDTH_OF_INT + *p++ = t | (c << lsh); +#else *p++ = t | ((c << lsh) & BMASK); +#endif if ( (c >>= rsh) == 0 ) return( lu + 1 ); *p = c; return( lu + 2 );