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[FAST486]

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Fix CF calculation in SHRD/SHLD.


svn path=/branches/ntvdm/; revision=61070
This commit is contained in:
Aleksandar Andrejevic 2013-11-22 02:47:48 +00:00
parent 24954c9d07
commit 9a8c7e2a04
1 changed files with 6 additions and 2 deletions
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8
lib/fast486/extraops.c
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@ -683,7 +683,9 @@ FAST486_OPCODE_HANDLER(Fast486ExtOpcodeShld)
Result = (Destination << Count) | (DoubleSource >> (32 - Count));
/* Update flags */
State->Flags.Cf = (Destination >> (16 - Count)) & 1;
if (Count <= 16) State->Flags.Cf = (Destination >> (16 - Count)) & 1;
else State->Flags.Cf = (Source >> (32 - Count)) & 1;
if (Count == 1) State->Flags.Of = (Result & SIGN_FLAG_WORD)
!= (Destination & SIGN_FLAG_WORD);
State->Flags.Zf = (Result == 0);
@ -887,7 +889,9 @@ FAST486_OPCODE_HANDLER(Fast486ExtOpcodeShrd)
if (Count >= 16) Result |= (ULONG)(Source | (Source << 16)) >> (Count - 16);
/* Update flags */
State->Flags.Cf = (Result >> (Count - 1)) & 1;
if (Count <= 16) State->Flags.Cf = (Destination >> (Count - 1)) & 1;
else State->Flags.Cf = (Source >> (Count - 17)) & 1;
if (Count == 1) State->Flags.Of = (Result & SIGN_FLAG_WORD)
!= (Destination & SIGN_FLAG_WORD);
State->Flags.Zf = (Result == 0);