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Fixed ROL/ROR flags anomaly (h.johansson)

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This commit is contained in:
Stanislav Shwartsman 2006-01-22 18:17:27 +00:00
parent 1ff08c3d6d
commit de9be40256
1 changed files with 6 additions and 3 deletions
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9
bochs/cpu/shift16.cc
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@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: shift16.cc,v 1.28 2005-10-13 20:21:35 sshwarts Exp $
// $Id: shift16.cc,v 1.29 2006-01-22 18:17:27 sshwarts Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2001 MandrakeSoft S.A.
@ -160,6 +160,7 @@ void BX_CPU_C::ROL_Ew(bxInstruction_c *i)
if ( count & 0x10 ) {
unsigned bit0 = op1_16 & 1;
set_CF(bit0);
set_OF(bit0 ^ (op1_16 >> 15))
}
return;
}
@ -207,8 +208,10 @@ void BX_CPU_C::ROR_Ew(bxInstruction_c *i)
if ( (count & 0x0f) == 0 ) {
if ( count & 0x10 ) {
unsigned MSB = op1_16 >> 15;
set_CF(MSB);
unsigned bit14 = (op1_16 >> 14) & 1;
unsigned bit15 = (op1_16 >> 15);
set_CF(bit15);
set_OF(bit15 ^ bit14);
}
return;
}