static Int a_cmp(Term t1, Term t2 USES_REGS) {
if (IsVarTerm(t1)) {
Yap_ArithError(INSTANTIATION_ERROR, t1,
"while doing arithmetic comparison");
}
if (IsVarTerm(t2)) {
Yap_ArithError(INSTANTIATION_ERROR, t2,
"while doing arithmetic comparison");
}
if (IsFloatTerm(t1) && IsFloatTerm(t2)) {
return flt_cmp(FloatOfTerm(t1) - FloatOfTerm(t2));
}
if (IsIntegerTerm(t1) && IsIntegerTerm(t2)) {
return int_cmp(IntegerOfTerm(t1) - IntegerOfTerm(t2));
}
t1 = Yap_Eval(t1);
if (!t1) {
return FALSE;
}
if (IsIntegerTerm(t1)) {
Int i1 = IntegerOfTerm(t1);
t2 = Yap_Eval(t2);
if (IsIntegerTerm(t2)) {
Int i2 = IntegerOfTerm(t2);
return int_cmp(i1 - i2);
} else if (IsFloatTerm(t2)) {
Float f2 = FloatOfTerm(t2);
#if HAVE_ISNAN
if (isnan(f2)) {
Yap_ArithError(EVALUATION_ERROR_UNDEFINED, t2,
"trying to evaluate nan");
}
#endif
return flt_cmp(i1 - f2);
#ifdef USE_GMP
} else if (IsBigIntTerm(t2)) {
return Yap_gmp_cmp_int_big(i1, t2);
#endif
} else {
return FALSE;
}
} else if (IsFloatTerm(t1)) {
Float f1 = FloatOfTerm(t1);
#if HAVE_ISNAN
if (isnan(f1)) {
Yap_ArithError(EVALUATION_ERROR_UNDEFINED, t1,
"trying to evaluate nan");
}
#endif
t2 = Yap_Eval(t2);
#if HAVE_ISNAN
if (isnan(f1))
return -1;
#endif
if (IsIntegerTerm(t2)) {
Int i2 = IntegerOfTerm(t2);
return flt_cmp(f1 - i2);
} else if (IsFloatTerm(t2)) {
Float f2 = FloatOfTerm(t2);
#if HAVE_ISNAN
if (isnan(f2)) {
Yap_ArithError(EVALUATION_ERROR_UNDEFINED, t2,
"trying to evaluate nan");
}
#endif
return flt_cmp(f1 - f2);
#ifdef USE_GMP
} else if (IsBigIntTerm(t2)) {
return Yap_gmp_cmp_float_big(f1, t2);
#endif
} else {
return FALSE;
}
#ifdef USE_GMP
} else if (IsBigIntTerm(t1)) {
{
t2 = Yap_Eval(t2);
if (IsIntegerTerm(t2)) {
return Yap_gmp_cmp_big_int(t1, IntegerOfTerm(t2));
} else if (IsFloatTerm(t2)) {
Float f2 = FloatOfTerm(t2);
#if HAVE_ISNAN
if (isnan(f2)) {
Yap_ArithError(EVALUATION_ERROR_UNDEFINED, t2,
"trying to evaluate nan");
}
#endif
return Yap_gmp_cmp_big_float(t1, f2);
} else if (IsBigIntTerm(t2)) {
return Yap_gmp_cmp_big_big(t1, t2);
} else {
return FALSE;
}
}
#endif
} else {
return FALSE;
}
}
/*
maximum: max(x,y)
*/
static Term
p_max(Term t1, Term t2)
{
switch (ETypeOfTerm(t1)) {
case long_int_e:
switch (ETypeOfTerm(t2)) {
case long_int_e:
{
Int i1 = IntegerOfTerm(t1);
Int i2 = IntegerOfTerm(t2);
return((i1 > i2 ? t1 : t2));
}
case double_e:
{
/* integer, double */
Int i = IntegerOfTerm(t1);
Float fl = FloatOfTerm(t2);
if (i >= fl) {
return t1;
}
return t2;
}
case big_int_e:
#ifdef USE_GMP
if (Yap_gmp_cmp_int_big(IntegerOfTerm(t1), t2) > 0) {
return t1;
}
return t2;
#endif
default:
RERROR();
}
break;
case double_e:
switch (ETypeOfTerm(t2)) {
case long_int_e:
/* float / integer */
{
Int i = IntegerOfTerm(t2);
Float fl = FloatOfTerm(t1);
if (i >= fl) {
return t2;
}
return t1;
}
case double_e:
{
Float fl1 = FloatOfTerm(t1);
Float fl2 = FloatOfTerm(t2);
if (fl1 >= fl2) {
return t1;
}
return t2;
}
case big_int_e:
#ifdef USE_GMP
if (Yap_gmp_cmp_float_big(FloatOfTerm(t1), t2) > 0) {
return t1;
}
return t2;
#endif
default:
RERROR();
}
break;
case big_int_e:
#ifdef USE_GMP
switch (ETypeOfTerm(t2)) {
case long_int_e:
if (Yap_gmp_cmp_big_int(t1, IntegerOfTerm(t2)) > 0) {
return t1;
}
return t2;
case big_int_e:
if (Yap_gmp_cmp_big_big(t1, t2) > 0) {
return t1;
}
return t2;
case double_e:
if (Yap_gmp_cmp_big_float(t1, FloatOfTerm(t2)) > 0) {
return t1;
}
return t2;
default:
RERROR();
}
#endif
default:
RERROR();
}
RERROR();
}
static inline Int
a_cmp(Term t1, Term t2)
{
ArithError = FALSE;
if (IsVarTerm(t1)) {
ArithError = TRUE;
Yap_Error(INSTANTIATION_ERROR, t1, "=:=/2");
return FALSE;
}
if (IsVarTerm(t2)) {
ArithError = TRUE;
Yap_Error(INSTANTIATION_ERROR, t2, "=:=/2");
return FALSE;
}
if (IsFloatTerm(t1) && IsFloatTerm(t2)) {
return flt_cmp(FloatOfTerm(t1)-FloatOfTerm(t2));
}
if (IsIntegerTerm(t1) && IsIntegerTerm(t2)) {
return int_cmp(IntegerOfTerm(t1)-IntegerOfTerm(t2));
}
t1 = Yap_Eval(t1);
if (!t1) {
return FALSE;
}
if (IsIntegerTerm(t1)) {
Int i1 = IntegerOfTerm(t1);
t2 = Yap_Eval(t2);
if (IsIntegerTerm(t2)) {
Int i2 = IntegerOfTerm(t2);
return int_cmp(i1-i2);
} else if (IsFloatTerm(t2)) {
Float f2 = FloatOfTerm(t2);
#if HAVE_ISNAN
if (isnan(f2)) {
Yap_Error_TYPE = EVALUATION_ERROR_UNDEFINED;
Yap_Error_Term = t2;
Yap_ErrorMessage = "trying to evaluate nan";
ArithError = TRUE;
}
#endif
return flt_cmp(i1-f2);
#ifdef USE_GMP
} else if (IsBigIntTerm(t2)) {
return Yap_gmp_cmp_int_big(i1,t2);
#endif
} else {
return FALSE;
}
} else if (IsFloatTerm(t1)) {
Float f1 = FloatOfTerm(t1);
#if HAVE_ISNAN
if (isnan(f1)) {
Yap_Error_TYPE = EVALUATION_ERROR_UNDEFINED;
Yap_Error_Term = t1;
Yap_ErrorMessage = "trying to evaluate nan";
ArithError = TRUE;
}
#endif
t2 = Yap_Eval(t2);
#if HAVE_ISNAN
if (isnan(f1))
return -1;
#endif
if (IsIntegerTerm(t2)) {
Int i2 = IntegerOfTerm(t2);
return flt_cmp(f1-i2);
} else if (IsFloatTerm(t2)) {
Float f2 = FloatOfTerm(t2);
#if HAVE_ISNAN
if (isnan(f2)) {
Yap_Error_TYPE = EVALUATION_ERROR_UNDEFINED;
Yap_Error_Term = t2;
Yap_ErrorMessage = "trying to evaluate nan";
ArithError = TRUE;
}
#endif
return flt_cmp(f1-f2);
#ifdef USE_GMP
} else if (IsBigIntTerm(t2)) {
return Yap_gmp_cmp_float_big(f1,t2);
#endif
} else {
return FALSE;
}
#ifdef USE_GMP
} else if (IsBigIntTerm(t1)) {
{
t2 = Yap_Eval(t2);
if (IsIntegerTerm(t2)) {
return Yap_gmp_cmp_big_int(t1, IntegerOfTerm(t2));
} else if (IsFloatTerm(t2)) {
Float f2 = FloatOfTerm(t2);
#if HAVE_ISNAN
if (isnan(f2)) {
Yap_Error_TYPE = EVALUATION_ERROR_UNDEFINED;
Yap_Error_Term = t2;
Yap_ErrorMessage = "trying to evaluate nan";
ArithError = TRUE;
}
#endif
return Yap_gmp_cmp_big_float(t1, f2);
} else if (IsBigIntTerm(t2)) {
return Yap_gmp_cmp_big_big(t1, t2);
} else {
return FALSE;
}
}
#endif
} else {
return FALSE;
}
}
