[439] | 1 | /**
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| 2 | ** @file mruby/boxing_nan.h - nan boxing mrb_value definition
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[270] | 3 | **
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| 4 | ** See Copyright Notice in mruby.h
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| 5 | */
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| 6 |
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| 7 | #ifndef MRUBY_BOXING_NAN_H
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| 8 | #define MRUBY_BOXING_NAN_H
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| 9 |
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| 10 | #ifdef MRB_USE_FLOAT
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| 11 | # error ---->> MRB_NAN_BOXING and MRB_USE_FLOAT conflict <<----
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| 12 | #endif
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| 13 |
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[439] | 14 | #ifdef MRB_WITHOUT_FLOAT
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| 15 | # error ---->> MRB_NAN_BOXING and MRB_WITHOUT_FLOAT conflict <<----
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| 16 | #endif
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| 17 |
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[270] | 18 | #ifdef MRB_INT64
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| 19 | # error ---->> MRB_NAN_BOXING and MRB_INT64 conflict <<----
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| 20 | #endif
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| 21 |
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| 22 | #define MRB_FIXNUM_SHIFT 0
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[439] | 23 | #define MRB_SYMBOL_SHIFT 0
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[270] | 24 |
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| 25 | /* value representation by nan-boxing:
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| 26 | * float : FFFFFFFFFFFFFFFF FFFFFFFFFFFFFFFF FFFFFFFFFFFFFFFF FFFFFFFFFFFFFFFF
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| 27 | * object: 111111111111TTTT TTPPPPPPPPPPPPPP PPPPPPPPPPPPPPPP PPPPPPPPPPPPPPPP
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| 28 | * int : 1111111111110001 0000000000000000 IIIIIIIIIIIIIIII IIIIIIIIIIIIIIII
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| 29 | * sym : 1111111111110001 0100000000000000 SSSSSSSSSSSSSSSS SSSSSSSSSSSSSSSS
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| 30 | * In order to get enough bit size to save TT, all pointers are shifted 2 bits
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| 31 | * in the right direction. Also, TTTTTT is the mrb_vtype + 1;
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| 32 | */
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| 33 | typedef struct mrb_value {
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| 34 | union {
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| 35 | mrb_float f;
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| 36 | union {
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| 37 | void *p;
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| 38 | struct {
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| 39 | MRB_ENDIAN_LOHI(
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| 40 | uint32_t ttt;
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| 41 | ,union {
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| 42 | mrb_int i;
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| 43 | mrb_sym sym;
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| 44 | };
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| 45 | )
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| 46 | };
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| 47 | } value;
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| 48 | };
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| 49 | } mrb_value;
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| 50 |
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| 51 | #define mrb_float_pool(mrb,f) mrb_float_value(mrb,f)
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| 52 |
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| 53 | #define mrb_tt(o) ((enum mrb_vtype)(((o).value.ttt & 0xfc000)>>14)-1)
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[331] | 54 | #define mrb_type(o) (enum mrb_vtype)((uint32_t)0xfff00000 < (o).value.ttt ? mrb_tt(o) : MRB_TT_FLOAT)
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[270] | 55 | #define mrb_ptr(o) ((void*)((((uintptr_t)0x3fffffffffff)&((uintptr_t)((o).value.p)))<<2))
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| 56 | #define mrb_float(o) (o).f
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| 57 | #define mrb_cptr(o) mrb_ptr(o)
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| 58 | #define mrb_fixnum(o) (o).value.i
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| 59 | #define mrb_symbol(o) (o).value.sym
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| 60 |
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[331] | 61 | #ifdef MRB_64BIT
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| 62 | #define BOXNAN_SHIFT_LONG_POINTER(v) (((uintptr_t)(v)>>34)&0x3fff)
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| 63 | #else
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| 64 | #define BOXNAN_SHIFT_LONG_POINTER(v) 0
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| 65 | #endif
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| 66 |
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[270] | 67 | #define BOXNAN_SET_VALUE(o, tt, attr, v) do {\
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[331] | 68 | (o).attr = (v);\
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| 69 | (o).value.ttt = 0xfff00000 | (((tt)+1)<<14);\
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[270] | 70 | } while (0)
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| 71 |
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[331] | 72 | #define BOXNAN_SET_OBJ_VALUE(o, tt, v) do {\
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| 73 | (o).value.p = (void*)((uintptr_t)(v)>>2);\
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| 74 | (o).value.ttt = (0xfff00000|(((tt)+1)<<14)|BOXNAN_SHIFT_LONG_POINTER(v));\
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| 75 | } while (0)
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| 76 |
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[270] | 77 | #define SET_FLOAT_VALUE(mrb,r,v) do { \
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[439] | 78 | if ((v) != (v)) { \
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[270] | 79 | (r).value.ttt = 0x7ff80000; \
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| 80 | (r).value.i = 0; \
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[331] | 81 | } \
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| 82 | else { \
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[270] | 83 | (r).f = v; \
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| 84 | }} while(0)
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| 85 |
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| 86 | #define SET_NIL_VALUE(r) BOXNAN_SET_VALUE(r, MRB_TT_FALSE, value.i, 0)
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| 87 | #define SET_FALSE_VALUE(r) BOXNAN_SET_VALUE(r, MRB_TT_FALSE, value.i, 1)
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| 88 | #define SET_TRUE_VALUE(r) BOXNAN_SET_VALUE(r, MRB_TT_TRUE, value.i, 1)
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| 89 | #define SET_BOOL_VALUE(r,b) BOXNAN_SET_VALUE(r, b ? MRB_TT_TRUE : MRB_TT_FALSE, value.i, 1)
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| 90 | #define SET_INT_VALUE(r,n) BOXNAN_SET_VALUE(r, MRB_TT_FIXNUM, value.i, (n))
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| 91 | #define SET_SYM_VALUE(r,v) BOXNAN_SET_VALUE(r, MRB_TT_SYMBOL, value.sym, (v))
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[331] | 92 | #define SET_OBJ_VALUE(r,v) BOXNAN_SET_OBJ_VALUE(r, (((struct RObject*)(v))->tt), (v))
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| 93 | #define SET_CPTR_VALUE(mrb,r,v) BOXNAN_SET_OBJ_VALUE(r, MRB_TT_CPTR, v)
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[270] | 94 | #define SET_UNDEF_VALUE(r) BOXNAN_SET_VALUE(r, MRB_TT_UNDEF, value.i, 0)
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| 95 |
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| 96 | #endif /* MRUBY_BOXING_NAN_H */
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