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py: Move mp_float_t related defines to misc.h

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David Steinberg 2015-01-13 15:19:37 +00:00 committed by Damien George
parent 6b636738b2
commit c585ad1020
2 changed files with 22 additions and 15 deletions
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13
py/misc.h
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@ -183,4 +183,17 @@ static inline mp_uint_t count_lead_ones(byte val) {
}
#endif
/** float internals *************/
#if MICROPY_PY_BUILTINS_FLOAT
#if MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_DOUBLE
#define MP_FLOAT_EXP_BITS (11)
#define MP_FLOAT_FRAC_BITS (52)
#elif MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_FLOAT
#define MP_FLOAT_EXP_BITS (8)
#define MP_FLOAT_FRAC_BITS (23)
#endif
#define MP_FLOAT_EXP_BIAS ((1 << (MP_FLOAT_EXP_BITS - 1)) - 1)
#endif // MICROPY_PY_BUILTINS_FLOAT
#endif // __MICROPY_INCLUDED_PY_MISC_H__

24
py/mpz.c
View File

@ -698,29 +698,25 @@ void mpz_set_from_ll(mpz_t *z, long long val, bool is_signed) {
#if MICROPY_PY_BUILTINS_FLOAT
void mpz_set_from_float(mpz_t *z, mp_float_t src) {
#if MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_DOUBLE
#define EXP_SZ 11
#define FRC_SZ 52
typedef uint64_t mp_float_int_t;
#else
#define EXP_SZ 8
#define FRC_SZ 23
#elif MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_FLOAT
typedef uint32_t mp_float_int_t;
#endif
union {
mp_float_t f;
struct { mp_float_int_t frc:FRC_SZ, exp:EXP_SZ, sgn:1; } p;
struct { mp_float_int_t frc:MP_FLOAT_FRAC_BITS, exp:MP_FLOAT_EXP_BITS, sgn:1; } p;
} u = {src};
z->neg = u.p.sgn;
if (u.p.exp == 0) {
// value == 0 || value < 1
mpz_set_from_int(z, 0);
} else if (u.p.exp == ((1 << EXP_SZ) - 1)) {
} else if (u.p.exp == ((1 << MP_FLOAT_EXP_BITS) - 1)) {
// u.p.frc == 0 indicates inf, else NaN
// should be handled by caller
mpz_set_from_int(z, 0);
} else {
const int adj_exp = (int)u.p.exp - ((1 << (EXP_SZ - 1)) - 1);
const int adj_exp = (int)u.p.exp - MP_FLOAT_EXP_BIAS;
if (adj_exp < 0) {
// value < 1 , truncates to 0
mpz_set_from_int(z, 0);
@ -732,15 +728,15 @@ typedef uint32_t mp_float_int_t;
const int dig_cnt = (adj_exp + 1 + (DIG_SIZE - 1)) / DIG_SIZE;
const unsigned int rem = adj_exp % DIG_SIZE;
int dig_ind, shft;
mp_float_int_t frc = u.p.frc | ((mp_float_int_t)1 << FRC_SZ);
mp_float_int_t frc = u.p.frc | ((mp_float_int_t)1 << MP_FLOAT_FRAC_BITS);
if (adj_exp < FRC_SZ) {
if (adj_exp < MP_FLOAT_FRAC_BITS) {
shft = 0;
dig_ind = 0;
frc >>= FRC_SZ - adj_exp;
frc >>= MP_FLOAT_FRAC_BITS - adj_exp;
} else {
shft = (rem - FRC_SZ) % DIG_SIZE;
dig_ind = (adj_exp - FRC_SZ) / DIG_SIZE;
shft = (rem - MP_FLOAT_FRAC_BITS) % DIG_SIZE;
dig_ind = (adj_exp - MP_FLOAT_FRAC_BITS) / DIG_SIZE;
}
mpz_need_dig(z, dig_cnt);
z->len = dig_cnt;
@ -758,8 +754,6 @@ typedef uint32_t mp_float_int_t;
}
}
}
#undef EXP_SZ
#undef FRC_SZ
#endif
// returns number of bytes from str that were processed