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py: Use float-to-int classifications for mp_obj_new_int_from_float() functions

This commit is contained in:
David Steinberg 2015-01-13 15:22:30 +00:00 committed by Damien George
parent ca377b10de
commit 0fb17f6ef4
3 changed files with 36 additions and 12 deletions
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16
py/objint.c
View File

@ -306,9 +306,19 @@ mp_obj_t mp_obj_new_int_from_uint(mp_uint_t value) {
#if MICROPY_PY_BUILTINS_FLOAT
mp_obj_t mp_obj_new_int_from_float(mp_float_t val) {
// TODO raise an exception if the int won't fit
mp_int_t i = MICROPY_FLOAT_C_FUN(trunc)(val);
return mp_obj_new_int(i);
int cl = fpclassify(val);
if (cl == FP_INFINITE) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_OverflowError, "can't convert inf to int"));
} else if (cl == FP_NAN) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "can't convert NaN to int"));
} else {
mp_fp_as_int_class_t icl = mp_classify_fp_as_int(val);
if (icl == MP_FP_CLASS_FIT_SMALLINT) {
return MP_OBJ_NEW_SMALL_INT((mp_int_t)val);
} else {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "float too big"));
}
}
}
#endif

18
py/objint_longlong.c
View File

@ -187,9 +187,21 @@ mp_obj_t mp_obj_new_int_from_ull(unsigned long long val) {
#if MICROPY_PY_BUILTINS_FLOAT
mp_obj_t mp_obj_new_int_from_float(mp_float_t val) {
// TODO raise an exception if the unsigned long long won't fit
long long i = MICROPY_FLOAT_C_FUN(trunc)(val);
return mp_obj_new_int_from_ll(i);
int cl = fpclassify(val);
if (cl == FP_INFINITE) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_OverflowError, "can't convert inf to int"));
} else if (cl == FP_NAN) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "can't convert NaN to int"));
} else {
mp_fp_as_int_class_t icl = mp_classify_fp_as_int(val);
if (icl == MP_FP_CLASS_FIT_SMALLINT) {
return MP_OBJ_NEW_SMALL_INT((mp_int_t)val);
} else if (icl == MP_FP_CLASS_FIT_LONGINT) {
return mp_obj_new_int_from_ll((long long)val);
} else {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "float too big"));
}
}
}
#endif

14
py/objint_mpz.c
View File

@ -303,13 +303,15 @@ mp_obj_t mp_obj_new_int_from_float(mp_float_t val) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_OverflowError, "can't convert inf to int"));
} else if (cl == FP_NAN) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "can't convert NaN to int"));
} else if (MICROPY_FLOAT_C_FUN(fabs)(val) < 10000) {
// temporary(?) fix for optimising case where int will be small int
return MP_OBJ_NEW_SMALL_INT(MICROPY_FLOAT_C_FUN(trunc)(val));
} else {
mp_obj_int_t *o = mp_obj_int_new_mpz();
mpz_set_from_float(&o->mpz, val);
return o;
mp_fp_as_int_class_t icl = mp_classify_fp_as_int(val);
if (icl == MP_FP_CLASS_FIT_SMALLINT) {
return MP_OBJ_NEW_SMALL_INT((mp_int_t)val);
} else {
mp_obj_int_t *o = mp_obj_int_new_mpz();
mpz_set_from_float(&o->mpz, val);
return o;
}
}
}
#endif