diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/mruby/boxing_nan.h | 137 |
1 files changed, 71 insertions, 66 deletions
diff --git a/include/mruby/boxing_nan.h b/include/mruby/boxing_nan.h index 90866ab55..a7dab2f40 100644 --- a/include/mruby/boxing_nan.h +++ b/include/mruby/boxing_nan.h @@ -24,13 +24,21 @@ #define MRB_FIXNUM_MIN INT32_MIN #define MRB_FIXNUM_MAX INT32_MAX +enum mrb_nanbox_tt_inline { + MRB_NANBOX_TT_OBJECT = 1, + MRB_NANBOX_TT_INTEGER, + MRB_NANBOX_TT_SYMBOL, + MRB_NANBOX_TT_POINTER, + MRB_NANBOX_TT_MISC, +}; + /* value representation by nan-boxing: * float : FFFFFFFFFFFFFFFF FFFFFFFFFFFFFFFF FFFFFFFFFFFFFFFF FFFFFFFFFFFFFFFF - * object: 111111111111TTTT TTPPPPPPPPPPPPPP PPPPPPPPPPPPPPPP PPPPPPPPPPPPPPPP - * int : 1111111111110001 0000000000000000 IIIIIIIIIIIIIIII IIIIIIIIIIIIIIII - * sym : 1111111111110001 0100000000000000 SSSSSSSSSSSSSSSS SSSSSSSSSSSSSSSS - * In order to get enough bit size to save TT, all pointers are shifted 2 bits - * in the right direction. Also, TTTTTT is the mrb_vtype + 1; + * object: 1111111111110001 PPPPPPPPPPPPPPPP PPPPPPPPPPPPPPPP PPPPPPPPPPPPPPPP + * int : 1111111111110010 0000000000000000 IIIIIIIIIIIIIIII IIIIIIIIIIIIIIII + * sym : 1111111111110011 0000000000000000 SSSSSSSSSSSSSSSS SSSSSSSSSSSSSSSS + * ptr : 1111111111110100 0000000000000000 SSSSSSSSSSSSSSSS SSSSSSSSSSSSSSSS + * misc : 1111111111110101 0000000000000000 0000000000000000 TTTTTT000000MMMM */ typedef struct mrb_value { uint64_t u; @@ -54,77 +62,74 @@ union mrb_value_ { mrb_value value; }; -mrb_static_assert1(sizeof(mrb_value) == sizeof(union mrb_value_)); +mrb_static_assert(sizeof(mrb_value) == sizeof(union mrb_value_)); -static inline union mrb_value_ -mrb_val_union(mrb_value v) +static inline mrb_float +mrb_float(mrb_value v) { - union mrb_value_ x; - x.value = v; - return x; + union { + mrb_float f; + uint64_t u; + } x; + x.u = v.u; + return x.f; } -#define mrb_tt(o) ((enum mrb_vtype)((mrb_val_union(o).ttt & 0xfc000)>>14)-1) -#define mrb_type(o) (enum mrb_vtype)((uint32_t)0xfff00000 < mrb_val_union(o).ttt ? mrb_tt(o) : MRB_TT_FLOAT) -#define mrb_float(o) mrb_val_union(o).f -#define mrb_fixnum(o) ((mrb_int)mrb_val_union(o).i) -#define mrb_integer(o) mrb_fixnum(o) -#define mrb_symbol(o) ((mrb_sym)mrb_val_union(o).i) - -#ifdef MRB_64BIT -#define mrb_ptr(o) ((void*)((((uintptr_t)0x3fffffffffff)&((uintptr_t)(mrb_val_union(o).p)))<<2)) -#define mrb_cptr(o) (((struct RCptr*)mrb_ptr(o))->p) -#define NANBOX_SHIFT_LONG_POINTER(v) (((uintptr_t)(v)>>34)&0x3fff) -#else -#define mrb_ptr(o) ((void*)mrb_val_union(o).i) -#define mrb_cptr(o) mrb_ptr(o) -#define NANBOX_SHIFT_LONG_POINTER(v) 0 -#endif - -#define NANBOX_SET_VALUE(o, tt, attr, v) do { \ - union mrb_value_ mrb_value_union_variable; \ - mrb_value_union_variable.attr = (v);\ - mrb_value_union_variable.ttt = 0xfff00000 | (((tt)+1)<<14);\ - o = mrb_value_union_variable.value;\ -} while (0) - -#ifdef MRB_64BIT -#define NANBOX_SET_OBJ_VALUE(o, tt, v) do {\ - union mrb_value_ mrb_value_union_variable;\ - mrb_value_union_variable.p = (void*)((uintptr_t)(v)>>2);\ - mrb_value_union_variable.ttt = (0xfff00000|(((tt)+1)<<14)|NANBOX_SHIFT_LONG_POINTER(v));\ - o = mrb_value_union_variable.value;\ -} while (0) -#else -#define NANBOX_SET_OBJ_VALUE(o, tt, v) NANBOX_SET_VALUE(o, tt, i, (uint32_t)v) -#endif - #define SET_FLOAT_VALUE(mrb,r,v) do { \ - union mrb_value_ mrb_value_union_variable; \ + union { \ + mrb_float f; \ + uint64_t u; \ + } float_uint_union; \ if ((v) != (v)) { /* NaN */ \ - mrb_value_union_variable.ttt = 0x7ff80000; \ - mrb_value_union_variable.i = 0; \ + float_uint_union.u = 0x7ff8000000000000UL; \ } \ else { \ - mrb_value_union_variable.f = (v); \ + float_uint_union.f = (v); \ } \ - r = mrb_value_union_variable.value; \ + r.u = float_uint_union.u; \ } while(0) -#define SET_NIL_VALUE(r) NANBOX_SET_VALUE(r, MRB_TT_FALSE, i, 0) -#define SET_FALSE_VALUE(r) NANBOX_SET_VALUE(r, MRB_TT_FALSE, i, 1) -#define SET_TRUE_VALUE(r) NANBOX_SET_VALUE(r, MRB_TT_TRUE, i, 1) -#define SET_BOOL_VALUE(r,b) NANBOX_SET_VALUE(r, b ? MRB_TT_TRUE : MRB_TT_FALSE, i, 1) -#define SET_INT_VALUE(mrb, r,n) NANBOX_SET_VALUE(r, MRB_TT_INTEGER, i, (uint32_t)(n)) -#define SET_FIXNUM_VALUE(r,n) NANBOX_SET_VALUE(r, MRB_TT_INTEGER, i, (uint32_t)(n)) -#define SET_SYM_VALUE(r,v) NANBOX_SET_VALUE(r, MRB_TT_SYMBOL, i, (uint32_t)(v)) -#define SET_OBJ_VALUE(r,v) NANBOX_SET_OBJ_VALUE(r, (((struct RObject*)(v))->tt), (v)) -#ifdef MRB_64BIT -MRB_API mrb_value mrb_nan_boxing_cptr_value(struct mrb_state*, void*); -#define SET_CPTR_VALUE(mrb,r,v) ((r) = mrb_nan_boxing_cptr_value(mrb, v)) -#else -#define SET_CPTR_VALUE(mrb,r,v) NANBOX_SET_VALUE(r, MRB_TT_CPTR, p, v) -#endif -#define SET_UNDEF_VALUE(r) NANBOX_SET_VALUE(r, MRB_TT_UNDEF, i, 0) +#define NANBOX_SET_VALUE(o, tt, v) do { \ + (o).u = ((0xfff0|(tt))<<48) | (v).u; \ +} while (0) + +MRB_INLINE enum mrb_vtype +mrb_type(mrb_value o) +{ + if ((o.u >> 52) == 0xfff) return MRB_TT_FLOAT; + switch ((o.u >> 48) & 7) { + case MRB_NANBOX_TT_OBJECT: { + uintptr_t u = o.u & ~((~0)<<48); + return ((struct RBasic *)u)->tt; + } + case MRB_NANBOX_TT_INTEGER: + return MRB_TT_INTEGER; + case MRB_NANBOX_TT_SYMBOL: + return MRB_TT_SYMBOL; + case MRB_NANBOX_TT_POINTER: + return MRB_TT_CPTR; + case MRB_NANBOX_TT_MISC: + return (enum mrb_vtype)(o.u >> 5) & 0x1f; + default: + return MRB_TT_FLOAT; + } +} + +#define mrb_fixnum(o) ((mrb_int)((uintptr_t)0xffffffff)&((o).u)) +#define mrb_integer(o) mrb_fixnum(o) +#define mrb_symbol(o) ((mrb_sym)((uintptr_t)0xffffffff)&((o).u)) +#define mrb_ptr(o) ((void*)(((uintptr_t)0xfffffffffff)&((o).u))) +#define mrb_cptr(o) mrb_ptr(o) + +#define SET_NIL_VALUE(r) NANBOX_SET_MISC_VALUE(r, MRB_TT_FALSE, 0) +#define SET_FALSE_VALUE(r) NANBOX_SET_MISC_VALUE(r, MRB_TT_FALSE, 1) +#define SET_TRUE_VALUE(r) NANBOX_SET_MISC_VALUE(r, MRB_TT_TRUE, 1) +#define SET_BOOL_VALUE(r,b) NANBOX_SET_MISC_VALUE(r, b ? MRB_TT_TRUE : MRB_TT_FALSE, 1) +#define SET_INT_VALUE(mrb,r,n) SET_FIXNUM_VALUE(r,n) +#define SET_FIXNUM_VALUE(r,n) NANBOX_SET_VALUE(r, MRB_NANBOX_TT_INTEGER, (uint32_t)(n)) +#define SET_SYM_VALUE(r,v) NANBOX_SET_VALUE(r, MRB_NANBOX_TT_SYMBOL, (uint32_t)(v)) +#define SET_OBJ_VALUE(r,v) NANBOX_SET_VALUE(o, MRB_NANBOT_TT_OBJECT, v) +#define SET_CPTR_VALUE(mrb,r,v) NANBOX_SET_VALUE(o, MRB_NANBOT_TT_POINTER, v) +#define SET_UNDEF_VALUE(r) NANBOX_SET_MISC_VALUE(r, MRB_TT_UNDEF, 4) #endif /* MRUBY_BOXING_NAN_H */ |