added some code for bigint division
This commit is contained in:
hyunghwan.chung
parent
48efc4dbc8
commit
a32e1903bf
@ -279,6 +279,15 @@ PROCESS TESTING
|
||||
(7 \\ -3) dump.
|
||||
(7 // -3) dump.
|
||||
|
||||
##(777777777777777777777777777777777777777777777777777777777777777777777 rem: -8127348917239812731289371289731298) dump.
|
||||
##(777777777777777777777777777777777777777777777777777777777777777777777 quo: -8127348917239812731289371289731298) dump.
|
||||
|
||||
(-270000000000000000000000000000000000000000000000000000000000000000000 rem: 50000000000000000000000000000000000000000000000000000000000000000000) dump.
|
||||
(-270000000000000000000000000000000000000000000000000000000000000000000 quo: 50000000000000000000000000000000000000000000000000000000000000000000) dump.
|
||||
(-270000000000000000000000000000000000000000000000000000000000000000000 \\ 50000000000000000000000000000000000000000000000000000000000000000000) dump.
|
||||
(-270000000000000000000000000000000000000000000000000000000000000000000 // 50000000000000000000000000000000000000000000000000000000000000000000) dump.
|
||||
|
||||
|
||||
"
|
||||
FFI isNil dump.
|
||||
FFI notNil dump.
|
||||
|
||||
@ -283,6 +283,19 @@ static STIX_INLINE stix_oop_t clone_bigint_negated (stix_t* stix, stix_oop_t oop
|
||||
return z;
|
||||
}
|
||||
|
||||
static STIX_INLINE stix_oow_t count_effective (stix_liw_t* x, stix_oow_t xs)
|
||||
{
|
||||
stix_oow_t i;
|
||||
|
||||
for (i = xs; i > 1; )
|
||||
{
|
||||
--i;
|
||||
if (x[i] != 0) return i + 1;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static STIX_INLINE stix_oow_t count_effective_digits (stix_oop_t oop)
|
||||
{
|
||||
stix_oow_t i;
|
||||
@ -654,16 +667,32 @@ static void divide_unsigned_array (
|
||||
* end
|
||||
*/
|
||||
|
||||
stix_liw_t* d;
|
||||
stix_oow_t ds;
|
||||
stix_oow_t rs, i , j;
|
||||
|
||||
/* TODO: */
|
||||
while (!is_less_unsigned_array (d, ds, y, ys)) /* while (y <= d) */
|
||||
STIX_ASSERT (xs >= ys);
|
||||
STIX_MEMSET (q, 0, STIX_SIZEOF(*q) * xs);
|
||||
STIX_MEMSET (r, 0, STIX_SIZEOF(*q) * xs);
|
||||
|
||||
/*rs = 1; */
|
||||
for (i = xs; i > 0; )
|
||||
{
|
||||
--i;
|
||||
for (j = STIX_SIZEOF(stix_liw_t) * 8; j > 0;)
|
||||
{
|
||||
--j;
|
||||
|
||||
lshift_unsigned_array (r, xs, 1);
|
||||
STIX_SETBITS (stix_liw_t, r[0], 0, 1, STIX_GETBITS(stix_liw_t, x[i], j, 1));
|
||||
|
||||
rs = count_effective (r, xs);
|
||||
if (!is_less_unsigned_array (r, rs, y, ys))
|
||||
{
|
||||
subtract_unsigned_array (r, rs, y, ys, r);
|
||||
STIX_SETBITS (stix_liw_t, q[i], j, 1, 1);
|
||||
}
|
||||
}
|
||||
/*if (xs > rs && r[rs] > 0) rs++;*/
|
||||
}
|
||||
|
||||
STIX_MEMCPY (r, d, ds);
|
||||
}
|
||||
|
||||
static stix_oop_t add_unsigned_integers (stix_t* stix, stix_oop_t x, stix_oop_t y)
|
||||
@ -700,7 +729,7 @@ static stix_oop_t subtract_unsigned_integers (stix_t* stix, stix_oop_t x, stix_o
|
||||
{
|
||||
stix_oop_t z;
|
||||
|
||||
STIX_ASSERT (!is_less(stix, x, y));
|
||||
STIX_ASSERT (!is_less_unsigned(x, y));
|
||||
|
||||
stix_pushtmp (stix, &x);
|
||||
stix_pushtmp (stix, &y);
|
||||
@ -730,6 +759,28 @@ static stix_oop_t multiply_unsigned_integers (stix_t* stix, stix_oop_t x, stix_o
|
||||
return z;
|
||||
}
|
||||
|
||||
static stix_oop_t divide_unsigned_integers (stix_t* stix, stix_oop_t x, stix_oop_t y, stix_oop_t* r)
|
||||
{
|
||||
stix_oop_t qq, rr;
|
||||
|
||||
/* the caller must ensure that x >= y */
|
||||
STIX_ASSERT (!is_less_unsigned (x, y));
|
||||
stix_pushtmp (stix, &x);
|
||||
stix_pushtmp (stix, &y);
|
||||
qq = stix_instantiate (stix, stix->_large_positive_integer, STIX_NULL, STIX_OBJ_GET_SIZE(x));
|
||||
stix_pushtmp (stix, &qq);
|
||||
rr = stix_instantiate (stix, stix->_large_positive_integer, STIX_NULL, STIX_OBJ_GET_SIZE(x));
|
||||
stix_poptmps (stix, 3);
|
||||
|
||||
divide_unsigned_array (
|
||||
((stix_oop_liword_t)x)->slot, STIX_OBJ_GET_SIZE(x),
|
||||
((stix_oop_liword_t)y)->slot, STIX_OBJ_GET_SIZE(y),
|
||||
((stix_oop_liword_t)qq)->slot, ((stix_oop_liword_t)rr)->slot);
|
||||
|
||||
if (r) *r = rr;
|
||||
return qq;
|
||||
}
|
||||
|
||||
stix_oop_t stix_addints (stix_t* stix, stix_oop_t x, stix_oop_t y)
|
||||
{
|
||||
stix_oop_t z;
|
||||
@ -789,14 +840,33 @@ stix_oop_t stix_addints (stix_t* stix, stix_oop_t x, stix_oop_t y)
|
||||
if (STIX_OBJ_GET_CLASS(x) == stix->_large_negative_integer)
|
||||
{
|
||||
/* x is negative, y is positive */
|
||||
z = stix_subints (stix, y, x);
|
||||
if (is_less_unsigned (x, y))
|
||||
{
|
||||
z = subtract_unsigned_integers (stix, y, x);
|
||||
if (!z) return STIX_NULL;
|
||||
}
|
||||
else
|
||||
{
|
||||
z = subtract_unsigned_integers (stix, x, y);
|
||||
if (!z) return STIX_NULL;
|
||||
STIX_OBJ_SET_CLASS(z, stix->_large_negative_integer);
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* x is positive, y is negative */
|
||||
z = stix_subints (stix, x, y);
|
||||
}
|
||||
if (is_less_unsigned (x, y))
|
||||
{
|
||||
z = subtract_unsigned_integers (stix, y, x);
|
||||
if (!z) return STIX_NULL;
|
||||
STIX_OBJ_SET_CLASS(z, stix->_large_negative_integer);
|
||||
}
|
||||
else
|
||||
{
|
||||
z = subtract_unsigned_integers (stix, x, y);
|
||||
if (!z) return STIX_NULL;
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
@ -1036,7 +1106,8 @@ oops_einval:
|
||||
|
||||
stix_oop_t stix_divints (stix_t* stix, stix_oop_t x, stix_oop_t y, int modulo, stix_oop_t* rem)
|
||||
{
|
||||
stix_oop_t t;
|
||||
stix_oop_t z;
|
||||
int x_neg, y_neg;
|
||||
|
||||
if (STIX_OOP_IS_SMOOI(x) && STIX_OOP_IS_SMOOI(y))
|
||||
{
|
||||
@ -1127,43 +1198,145 @@ stix_oop_t stix_divints (stix_t* stix, stix_oop_t x, stix_oop_t y, int modulo, s
|
||||
}
|
||||
else if (STIX_OOP_IS_SMOOI(x))
|
||||
{
|
||||
if (STIX_OOP_TO_SMOOI(x) == 0)
|
||||
stix_ooi_t v;
|
||||
|
||||
v = STIX_OOP_TO_SMOOI(x);
|
||||
if (v == 0)
|
||||
{
|
||||
if (rem)
|
||||
{
|
||||
t = clone_bigint (stix, y, STIX_OBJ_GET_SIZE(y));
|
||||
if (!t) return STIX_NULL;
|
||||
*rem = t;
|
||||
z = clone_bigint (stix, y, STIX_OBJ_GET_SIZE(y));
|
||||
if (!z) return STIX_NULL;
|
||||
*rem = z;
|
||||
}
|
||||
return STIX_SMOOI_TO_OOP(0);
|
||||
}
|
||||
/* TODO: convert x to bigint */
|
||||
|
||||
stix_pushtmp (stix, &y);
|
||||
x = make_bigint_with_ooi (stix, v);
|
||||
stix_poptmp (stix);
|
||||
}
|
||||
else if (STIX_OOP_IS_SMOOI(y))
|
||||
{
|
||||
switch (STIX_OOP_TO_SMOOI(y))
|
||||
stix_ooi_t v;
|
||||
|
||||
v = STIX_OOP_TO_SMOOI(y);
|
||||
switch (v)
|
||||
{
|
||||
case 0:
|
||||
stix->errnum = STIX_EDIVBY0;
|
||||
return STIX_NULL;
|
||||
|
||||
case 1:
|
||||
t = clone_bigint (stix, x, STIX_OBJ_GET_SIZE(x));
|
||||
if (!t) return STIX_NULL;
|
||||
z = clone_bigint (stix, x, STIX_OBJ_GET_SIZE(x));
|
||||
if (!z) return STIX_NULL;
|
||||
if (rem) *rem = STIX_SMOOI_TO_OOP(0);
|
||||
return t;
|
||||
return z;
|
||||
|
||||
|
||||
/*
|
||||
case 2:
|
||||
DO SHIFTING.
|
||||
* if v is powerof2, do shifting???
|
||||
*/
|
||||
case -1:
|
||||
t = clone_bigint_negated (stix, x, STIX_OBJ_GET_SIZE(x));
|
||||
if (!t) return STIX_NULL;
|
||||
z = clone_bigint_negated (stix, x, STIX_OBJ_GET_SIZE(x));
|
||||
if (!z) return STIX_NULL;
|
||||
if (rem) *rem = STIX_SMOOI_TO_OOP(0);
|
||||
return t;
|
||||
}
|
||||
/* TODO: convert y to bigint */
|
||||
return z;
|
||||
}
|
||||
|
||||
/* TODO: do bigint division. */
|
||||
return STIX_NULL;
|
||||
stix_pushtmp (stix, &x);
|
||||
y = make_bigint_with_ooi (stix, v);
|
||||
stix_poptmp (stix);
|
||||
}
|
||||
|
||||
x_neg = STIX_OBJ_GET_CLASS(x) == stix->_large_negative_integer;
|
||||
y_neg = STIX_OBJ_GET_CLASS(y) == stix->_large_negative_integer;
|
||||
|
||||
stix_pushtmp (stix, &x);
|
||||
stix_pushtmp (stix, &y);
|
||||
z = divide_unsigned_integers (stix, x, y, rem);
|
||||
stix_poptmps (stix, 2);
|
||||
if (!z) return STIX_NULL;
|
||||
if (x_neg != y_neg)
|
||||
{
|
||||
STIX_OBJ_SET_CLASS(z, stix->_large_negative_integer);
|
||||
}
|
||||
|
||||
{ int i;
|
||||
printf ("QUO=>");
|
||||
for (i = STIX_OBJ_GET_SIZE(z); i > 0;)
|
||||
{
|
||||
printf ("%0*lX ", (int)(STIX_SIZEOF(stix_liw_t) * 2), (unsigned long)((stix_oop_liword_t)z)->slot[--i]);
|
||||
}
|
||||
printf ("\n");
|
||||
}
|
||||
|
||||
/* TODO: handle modulo... */
|
||||
if (rem)
|
||||
{
|
||||
stix_pushtmp (stix, &z);
|
||||
*rem = normalize_bigint (stix, *rem);
|
||||
stix_poptmp (stix);
|
||||
if (!*rem) return STIX_NULL;
|
||||
|
||||
if (x_neg)
|
||||
{
|
||||
STIX_OBJ_SET_CLASS(*rem, stix->_large_negative_integer);
|
||||
if (modulo)
|
||||
{
|
||||
{ int i;
|
||||
printf ("REM=>");
|
||||
for (i = STIX_OBJ_GET_SIZE(*rem); i > 0;)
|
||||
{
|
||||
printf ("%0*lX ", (int)(STIX_SIZEOF(stix_liw_t) * 2), (unsigned long)((stix_oop_liword_t)*rem)->slot[--i]);
|
||||
}
|
||||
printf ("\n");
|
||||
}
|
||||
stix_pushtmp (stix, &z);
|
||||
stix_pushtmp (stix, &y);
|
||||
*rem = stix_addints (stix, *rem, y);
|
||||
stix_poptmps (stix, 2);
|
||||
if (!*rem) return STIX_NULL;
|
||||
|
||||
{ int i;
|
||||
printf ("REM=>");
|
||||
for (i = STIX_OBJ_GET_SIZE(*rem); i > 0;)
|
||||
{
|
||||
printf ("%0*lX ", (int)(STIX_SIZEOF(stix_liw_t) * 2), (unsigned long)((stix_oop_liword_t)*rem)->slot[--i]);
|
||||
}
|
||||
printf ("\n");
|
||||
}
|
||||
stix_pushtmp (stix, rem);
|
||||
z = normalize_bigint (stix, z);
|
||||
stix_poptmp (stix);
|
||||
if (!z) return STIX_NULL;
|
||||
|
||||
stix_pushtmp (stix, rem);
|
||||
z = stix_subints (stix, z, STIX_SMOOI_TO_OOP(1));
|
||||
stix_poptmp (stix);
|
||||
return z;
|
||||
}
|
||||
}
|
||||
|
||||
{ int i;
|
||||
printf ("REM=>");
|
||||
for (i = STIX_OBJ_GET_SIZE(*rem); i > 0;)
|
||||
{
|
||||
printf ("%0*lX ", (int)(STIX_SIZEOF(stix_liw_t) * 2), (unsigned long)((stix_oop_liword_t)*rem)->slot[--i]);
|
||||
}
|
||||
printf ("\n");
|
||||
}
|
||||
|
||||
}
|
||||
else if (modulo && x_neg)
|
||||
{
|
||||
z = normalize_bigint (stix, z);
|
||||
return stix_subints (stix, z, STIX_SMOOI_TO_OOP(1));
|
||||
}
|
||||
|
||||
return normalize_bigint (stix, z);
|
||||
}
|
||||
|
||||
static stix_uint8_t ooch_val_tab[] =
|
||||
|
||||
Loading…
Reference in New Issue
Block a user