Error, error, unsupported BITS_PER_MP_LIMB
#endif
int
mpz_kronecker_ui (mpz_srcptr a, unsigned long b)
{
mp_srcptr a_ptr = PTR(a);
mp_size_t a_size;
mp_limb_t a_rem;
int result_bit1;
a_size = SIZ(a);
if (a_size == 0)
return JACOBI_0U (b);
if (b > GMP_NUMB_MAX)
{
mp_limb_t blimbs[2];
mpz_t bz;
ALLOC(bz) = numberof (blimbs);
PTR(bz) = blimbs;
mpz_set_ui (bz, b);
return mpz_kronecker (a, bz);
}
if ((b & 1) != 0)
{
result_bit1 = JACOBI_ASGN_SU_BIT1 (a_size, b);
}
else
{
mp_limb_t a_low = a_ptr[0];
int twos;
if (b == 0)
return JACOBI_LS0 (a_low, a_size); /* (a/0) */
if (! (a_low & 1))
return 0; /* (even/even)=0 */
/* (a/2)=(2/a) for a odd */
count_trailing_zeros (twos, b);
b >>= twos;
result_bit1 = (JACOBI_TWOS_U_BIT1 (twos, a_low)
^ JACOBI_ASGN_SU_BIT1 (a_size, b));
}
if (b == 1)
return JACOBI_BIT1_TO_PN (result_bit1); /* (a/1)=1 for any a */
a_size = ABS(a_size);
/* (a/b) = (a mod b / b) */
JACOBI_MOD_OR_MODEXACT_1_ODD (result_bit1, a_rem, a_ptr, a_size, b);
return mpn_jacobi_base (a_rem, (mp_limb_t) b, result_bit1);
}
int
mpz_kronecker_si (mpz_srcptr a, long b)
{
mp_srcptr a_ptr;
mp_size_t a_size;
mp_limb_t a_rem, b_limb;
int result_bit1;
a_size = SIZ(a);
if (a_size == 0)
return JACOBI_0S (b);
#if GMP_NUMB_BITS < BITS_PER_ULONG
if (b > GMP_NUMB_MAX || b < -GMP_NUMB_MAX)
{
mp_limb_t blimbs[2];
mpz_t bz;
ALLOC(bz) = numberof (blimbs);
PTR(bz) = blimbs;
mpz_set_si (bz, b);
return mpz_kronecker (a, bz);
}
#endif
result_bit1 = JACOBI_BSGN_SS_BIT1 (a_size, b);
b_limb = (unsigned long) ABS (b);
a_ptr = PTR(a);
if ((b_limb & 1) == 0)
{
mp_limb_t a_low = a_ptr[0];
int twos;
if (b_limb == 0)
return JACOBI_LS0 (a_low, a_size); /* (a/0) */
if (! (a_low & 1))
return 0; /* (even/even)=0 */
/* (a/2)=(2/a) for a odd */
count_trailing_zeros (twos, b_limb);
b_limb >>= twos;
result_bit1 ^= JACOBI_TWOS_U_BIT1 (twos, a_low);
}
