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[FAST486]

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Fix a bug in the ROL and ROR instructions.


svn path=/branches/ntvdm/; revision=60972
This commit is contained in:
Aleksandar Andrejevic 2013-11-13 13:32:00 +00:00
parent c7de214d81
commit acccaf3a90
1 changed files with 3 additions and 2 deletions
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5
lib/fast486/opgroups.c
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@ -167,8 +167,7 @@ Fast486RotateOperation(PFAST486_STATE State,
/* Normalize the count */ /* Normalize the count */
Count &= 0x1F; Count &= 0x1F;
if (Operation <= 1) Count %= Bits; if ((Operation == 2) || (Operation == 3)) Count %= Bits + 1;
else if (Operation <= 3) Count %= Bits + 1;
/* If the count is zero, do nothing */ /* If the count is zero, do nothing */
if (Count == 0) return Value; if (Count == 0) return Value;
@ -179,6 +178,7 @@ Fast486RotateOperation(PFAST486_STATE State,
/* ROL */ /* ROL */
case 0: case 0:
{ {
Count %= Bits;
Result = (Value << Count) | (Value >> (Bits - Count)); Result = (Value << Count) | (Value >> (Bits - Count));
/* Update CF and OF */ /* Update CF and OF */
@ -192,6 +192,7 @@ Fast486RotateOperation(PFAST486_STATE State,
/* ROR */ /* ROR */
case 1: case 1:
{ {
Count %= Bits;
Result = (Value >> Count) | (Value << (Bits - Count)); Result = (Value >> Count) | (Value << (Bits - Count));
/* Update CF and OF */ /* Update CF and OF */