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align memory access in Dict hashtable

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方而静 2024-06-18 21:22:31 +08:00
parent 026171e753
commit 8aa52ba64a
Signed by: szTom
GPG Key ID: 072D999D60C6473C
1 changed files with 7 additions and 4 deletions
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11
src/objects/dict.c
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@ -58,8 +58,9 @@ pkpy_Dict pkpy_Dict__copy(const pkpy_Dict* self) {
static int pkpy_Dict__htget(const pkpy_Dict* self, int h) { static int pkpy_Dict__htget(const pkpy_Dict* self, int h) {
#if PK_DICT_COMPACT_MODE #if PK_DICT_COMPACT_MODE
const int *p = (const int*)(((const char*)self->_hashtable) + h * pkpy_Dict__idx_size(self)); const int loc = pkpy_Dict__idx_size(self) * h;
return (*p) & pkpy_Dict__idx_null(self); const int *p = (const int*)(((const char*)self->_hashtable) + (loc & (~3)));
return (*p >> ((loc & 3) * 8)) & pkpy_Dict__idx_null(self);
#else #else
return ((const int*)self->_hashtable)[h]; return ((const int*)self->_hashtable)[h];
#endif #endif
@ -67,8 +68,10 @@ static int pkpy_Dict__htget(const pkpy_Dict* self, int h) {
static void pkpy_Dict__htset(pkpy_Dict* self, int h, int v) { static void pkpy_Dict__htset(pkpy_Dict* self, int h, int v) {
#if PK_DICT_COMPACT_MODE #if PK_DICT_COMPACT_MODE
int *p = (int*)(((char*)self->_hashtable) + h * pkpy_Dict__idx_size(self)); const int loc = pkpy_Dict__idx_size(self) * h;
*p = v | (*p & ~pkpy_Dict__idx_null(self)); int *p = (int*)(((char*)self->_hashtable) + (loc & (~3)));
const int shift = (loc & 3) * 8;
*p = (v << shift) | (*p & ~(pkpy_Dict__idx_null(self) << shift));
#else #else
((int*)self->_hashtable)[h] = v; ((int*)self->_hashtable)[h] = v;
#endif #endif