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fixed signed integer overflow in address_table::subtable_open() - by O. Galibert (nw)

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This commit is contained in:
Oliver Stöneberg 2014-10-23 11:15:43 +02:00
parent 2d5eacd0f5
commit f04db035c9
1 changed files with 2 additions and 1 deletions
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3
src/emu/memory.c
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@ -3435,7 +3435,8 @@ UINT16 *address_table::subtable_open(offs_t l1index)
for (int i=0; i<size; i++)
subptr[i] = subentry;
m_table[l1index] = newentry;
m_subtable[newentry - SUBTABLE_BASE].m_checksum = (subentry + (subentry << 8) + (subentry << 16) + (subentry << 24)) * ((1 << level2_bits())/4);
UINT32 subkey = subentry + (subentry << 8) + (subentry << 16) + (subentry << 24);
m_subtable[newentry - SUBTABLE_BASE].m_checksum = subkey * (((1 << level2_bits())/4));
subentry = newentry;
}