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yap-6.3/C/gmp_support.c
2008-11-28 15:54:08 +00:00

262 lines
4.9 KiB
C

/*************************************************************************
* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: gmp_support.c *
* Last rev: *
* mods: *
* comments: bignum code *
* *
*************************************************************************/
#include "Yap.h"
#include "Heap.h"
#include "eval.h"
#if USE_GMP
/* add i + j using temporary bigint new */
MP_INT *
Yap_gmp_add_ints(Int i, Int j, MP_INT *new)
{
mpz_init_set_si(new,i);
if (j > 0) {
mpz_add_ui(new, new, j);
} else {
if (j-1 > 0) { /* negative overflow */
mpz_sub_ui(new, new, -(j+1));
mpz_sub_ui(new, new, 1);
} else {
mpz_sub_ui(new, new, -j);
}
}
return new;
}
MP_INT *
Yap_gmp_sub_ints(Int i, Int j, MP_INT *new)
{
mpz_init_set_si(new,i);
if (j > 0) {
mpz_sub_ui(new, new, j);
} else {
if (j-1 > 0) { /* negative overflow */
mpz_add_ui(new, new, -(j+1));
mpz_add_ui(new, new, 1);
} else {
mpz_add_ui(new, new, -j);
}
}
return new;
}
MP_INT *
Yap_gmp_mul_ints(Int i, Int j, MP_INT *new)
{
mpz_init_set_si(new,i);
mpz_mul_si(new, new, j);
return new;
}
MP_INT *
Yap_gmp_sll_ints(Int i, Int j, MP_INT *new)
{
mpz_init_set_si(new,i);
mpz_mul_2exp(new, new, j);
return new;
}
/* add i + b using temporary bigint new */
MP_INT *
Yap_gmp_add_int_big(Int i, MP_INT *b, MP_INT *new)
{
mpz_init_set_si(new, i);
mpz_add(new, new, b);
return new;
}
/* sub i - b using temporary bigint new */
MP_INT *
Yap_gmp_sub_int_big(Int i, MP_INT *b, MP_INT *new)
{
mpz_init_set_si(new, i);
mpz_sub(new, new, b);
return new;
}
/* add i + b using temporary bigint new */
MP_INT *
Yap_gmp_mul_int_big(Int i, MP_INT *b, MP_INT *new)
{
mpz_init_set_si(new, i);
mpz_mul(new, new, b);
return new;
}
/* sub i - b using temporary bigint new */
MP_INT *
Yap_gmp_sub_big_int(MP_INT *b, Int i, MP_INT *new)
{
mpz_init_set_si(new, i);
mpz_neg(new, new);
mpz_add(new, new, b);
return new;
}
/* div i / b using temporary bigint new */
MP_INT *
Yap_gmp_div_big_int(MP_INT *b, Int i, MP_INT *new)
{
mpz_init_set(new, b);
if (yap_flags[INTEGER_ROUNDING_FLAG] == 0) {
if (i > 0) {
mpz_fdiv_q_ui(new, new, i);
} else if (i == 0) {
Yap_Error(EVALUATION_ERROR_ZERO_DIVISOR, MkIntTerm(0), "// /2");
return NULL;
} else {
/* we do not handle MIN_INT */
mpz_fdiv_q_ui(new, new, -i);
mpz_neg(new, new);
}
} else {
if (i > 0) {
mpz_tdiv_q_ui(new, new, i);
} else if (i == 0) {
Yap_Error(EVALUATION_ERROR_ZERO_DIVISOR, MkIntTerm(0), "// /2");
return NULL;
} else {
/* we do not handle MIN_INT */
mpz_tdiv_q_ui(new, new, -i);
mpz_neg(new, new);
}
}
return new;
}
/* sub i - b using temporary bigint new */
MP_INT *
Yap_gmp_and_int_big(Int i, MP_INT *b, MP_INT *new)
{
mpz_init_set_si(new, i);
mpz_and(new, new, b);
return new;
}
/* sub i - b using temporary bigint new */
MP_INT *
Yap_gmp_ior_int_big(Int i, MP_INT *b, MP_INT *new)
{
mpz_init_set_si(new, i);
mpz_ior(new, new, b);
return new;
}
/* add i + b using temporary bigint new */
MP_INT *
Yap_gmp_sll_big_int(MP_INT *b, Int i, MP_INT *new)
{
if (i > 0) {
mpz_init_set(new, b);
mpz_mul_2exp(new, new, i);
} else if (i == 0) {
mpz_init_set(new, b);
} else {
mpz_init_set(new, b);
if (i == Int_MIN) {
return NULL;
}
mpz_tdiv_q_2exp(new, new, -i);
}
return new;
}
MP_INT *
Yap_gmp_add_big_big(MP_INT *b1, MP_INT *b2, MP_INT *new)
{
mpz_init_set(new, b1);
mpz_add(new, new, b2);
return new;
}
MP_INT *
Yap_gmp_sub_big_big(MP_INT *b1, MP_INT *b2, MP_INT *new)
{
mpz_init_set(new, b1);
mpz_sub(new, new, b2);
return new;
}
MP_INT *
Yap_gmp_mul_big_big(MP_INT *b1, MP_INT *b2, MP_INT *new)
{
mpz_init_set(new, b1);
mpz_mul(new, new, b2);
return new;
}
/* div i / b using temporary bigint new */
MP_INT *
Yap_gmp_div_big_big(MP_INT *b1, MP_INT *b2, MP_INT *new)
{
mpz_init_set(new, b1);
if (yap_flags[INTEGER_ROUNDING_FLAG] == 0) {
mpz_fdiv_q(new, new, b2);
} else {
mpz_tdiv_q(new, new, b2);
}
return new;
}
MP_INT *
Yap_gmp_and_big_big(MP_INT *b1, MP_INT *b2, MP_INT *new)
{
mpz_init_set(new, b1);
mpz_and(new, new, b2);
return new;
}
MP_INT *
Yap_gmp_ior_big_big(MP_INT *b1, MP_INT *b2, MP_INT *new)
{
mpz_init_set(new, b1);
mpz_ior(new, new, b2);
return new;
}
Float
Yap_gmp_add_float_big(Float d, MP_INT *b)
{
return d+mpz_get_d(b);
}
Float
Yap_gmp_sub_float_big(Float d, MP_INT *b)
{
return d-mpz_get_d(b);
}
Float
Yap_gmp_sub_big_float(MP_INT *b, Float d)
{
return mpz_get_d(b)-d;
}
Float
Yap_gmp_mul_float_big(Float d, MP_INT *b)
{
return d*mpz_get_d(b);
}
#endif