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py/obj: Verify floating point type is correct for repr C.

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Prevents double-precision floats being enabled on 32-bit architectures
where they will not fit into the mp_obj_t encoding.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
This commit is contained in:
Jim Mussared 2022-10-18 00:18:54 +11:00 committed by Damien George
parent 68f166dae9
commit b161abc574
1 changed files with 7 additions and 0 deletions
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7
py/obj.h
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@ -173,6 +173,10 @@ static inline bool mp_obj_is_obj(mp_const_obj_t o) {
#elif MICROPY_OBJ_REPR == MICROPY_OBJ_REPR_C
#if MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_NONE
#error "MICROPY_OBJ_REPR_C requires float to be enabled."
#endif
static inline bool mp_obj_is_small_int(mp_const_obj_t o) {
return (((mp_int_t)(o)) & 1) != 0;
}
@ -189,6 +193,9 @@ static inline bool mp_obj_is_small_int(mp_const_obj_t o) {
#endif
static inline bool mp_obj_is_float(mp_const_obj_t o) {
// Ensure that 32-bit arch can only use single precision.
MP_STATIC_ASSERT(sizeof(mp_float_t) <= sizeof(mp_obj_t));
return (((mp_uint_t)(o)) & 3) == 2 && (((mp_uint_t)(o)) & 0xff800007) != 0x00000006;
}
static inline mp_float_t mp_obj_float_get(mp_const_obj_t o) {