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optimizations in icache

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This commit is contained in:
Stanislav Shwartsman 2009-03-24 12:37:28 +00:00
parent ef1b5b5763
commit 839ef8b6ce
1 changed files with 4 additions and 6 deletions
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10
bochs/cpu/icache.h
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@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: icache.h,v 1.45 2009-03-22 21:12:35 sshwarts Exp $
// $Id: icache.h,v 1.46 2009-03-24 12:37:28 sshwarts Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2007 Stanislav Shwartsman
@ -53,11 +53,9 @@ public:
BX_CPP_INLINE Bit32u hash(bx_phy_address pAddr) const {
#if BX_PHY_ADDRESS_LONG
// can share writeStamps between multiple pages
Bit32u lo = (pAddr >> 12) & (PHY_MEM_PAGES-1);
Bit32u hi = (pAddr >> 32) & (PHY_MEM_PAGES-1);
return lo ^ hi;
return (Bit32u) ((pAddr >> 12) & (PHY_MEM_PAGES-1));
#else
return (Bit32u)(pAddr) >> 12;
return (Bit32u) (pAddr) >> 12;
#endif
}
@ -90,7 +88,7 @@ public:
handleSMC(); // one of the CPUs might be running trace from this page
// Decrement page write stamp, so iCache entries with older stamps are
// effectively invalidated.
pageWriteStampTable[index]--;
pageWriteStampTable[index] = (pageWriteStampTable[index] - 1) & ~ICacheWriteStampFetchModeMask;
}
#endif
#if BX_DEBUGGER