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improved nan box performance

This commit is contained in:
CPunch 2020-12-04 12:19:07 -06:00
parent b936827cc6
commit d154d71163
1 changed files with 26 additions and 15 deletions
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41
src/cvalue.h
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@ -32,35 +32,46 @@ typedef union CValue {
cosmo_Number num;
} CValue;
#define MASK_SIGN_BIT ((uint64_t)1 << 63)
#define MASK_TYPE ((uint64_t)0xf)
#define MASK_PAYLOAD ((uint64_t)0xfffffffffff0)
#define MASK_TYPE ((uint64_t)0x7)
#define MASK_PAYLOAD ((uint64_t)0x0007fffffffffff8)
#define MAKE_PAYLOAD(x) ((uint64_t)(x) << 4)
// 3 bits (low bits) are reserved for the type
#define MAKE_PAYLOAD(x) (((uint64_t)(x) << 3) & MASK_PAYLOAD)
#define READ_PAYLOAD(x) (((x).data & MASK_PAYLOAD) >> 3)
// The bits that must be set to indicate a quiet NaN.
#define MASK_QUIETNAN ((uint64_t)0x7ffc000000000000)
#define MASK_QUIETNAN ((uint64_t)0x7ff8000000000000)
#define GET_TYPE(x) \
((((x).data & MASK_QUIETNAN) == MASK_QUIETNAN) ? ((x).data & MASK_TYPE) : COSMO_TNUMBER)
// sadly this requires a bit more than a simple macro :(
static inline CosmoType GET_TYPE(CValue val) {
/*static inline CosmoType GET_TYPE(CValue val) {
// it's not not a number (its a number)
if ((((val.data) & MASK_QUIETNAN) != MASK_QUIETNAN))
return COSMO_TNUMBER;
if ((((val.data) & (MASK_QUIETNAN | MASK_SIGN_BIT)) == (MASK_QUIETNAN | MASK_SIGN_BIT)))
return COSMO_TOBJ;
return (val.data & MASK_TYPE);
}
}*/
#define SIG_MASK (MASK_QUIETNAN | MASK_TYPE)
#define BOOL_SIG (MASK_QUIETNAN | COSMO_TBOOLEAN)
#define OBJ_SIG (MASK_QUIETNAN | COSMO_TOBJ)
#define NIL_SIG (MASK_QUIETNAN | COSMO_TNIL)
#define cosmoV_newNumber(x) ((CValue){.num = x})
#define cosmoV_newObj(x) ((CValue){.data = MASK_SIGN_BIT | MASK_QUIETNAN | (uint64_t)(uintptr_t)(x)})
#define cosmoV_newObj(x) ((CValue){.data = MASK_QUIETNAN | MAKE_PAYLOAD((uintptr_t)x) | COSMO_TOBJ})
#define cosmoV_newBoolean(x) ((CValue){.data = MASK_QUIETNAN | MAKE_PAYLOAD(x) | COSMO_TBOOLEAN})
#define cosmoV_newNil() ((CValue){.data = MASK_QUIETNAN | COSMO_TNIL})
#define cosmoV_readNumber(x) ((x).num)
#define cosmoV_readBoolean(x) ((bool)((x).data & MASK_PAYLOAD))
#define cosmoV_readObj(x) (((CObj*)(uintptr_t)(((x).data) & ~(MASK_SIGN_BIT | MASK_QUIETNAN))))
#define cosmoV_readBoolean(x) ((bool)READ_PAYLOAD(x))
#define cosmoV_readObj(x) ((CObj*)READ_PAYLOAD(x))
#define IS_NUMBER(x) (((x).data & MASK_QUIETNAN) != MASK_QUIETNAN)
#define IS_BOOLEAN(x) (((x).data & SIG_MASK) == BOOL_SIG)
#define IS_NIL(x) (((x).data & SIG_MASK) == NIL_SIG)
#define IS_OBJ(x) (((x).data & SIG_MASK) == OBJ_SIG)
#else
/*
@ -90,13 +101,13 @@ typedef struct CValue {
#define cosmoV_readBoolean(x) ((bool)(x).val.b)
#define cosmoV_readObj(x) ((CObj*)(x).val.obj)
#endif
#define IS_NUMBER(x) (GET_TYPE(x) == COSMO_TNUMBER)
#define IS_BOOLEAN(x) (GET_TYPE(x) == COSMO_TBOOLEAN)
#define IS_NIL(x) (GET_TYPE(x) == COSMO_TNIL)
#define IS_OBJ(x) (GET_TYPE(x) == COSMO_TOBJ)
#endif
typedef CValue* StkPtr;
typedef struct CValueArray {