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Small optimizations

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This commit is contained in:
Stanislav Shwartsman 2004-10-03 21:52:10 +00:00
parent a28a2c6ce1
commit 4988a098f5
2 changed files with 3 additions and 7 deletions
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5
bochs/cpu/proc_ctrl.cc
View File

@ -1,5 +1,5 @@
///////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////
// $Id: proc_ctrl.cc,v 1.82 2004-09-21 20:19:19 sshwarts Exp $ // $Id: proc_ctrl.cc,v 1.83 2004-10-03 21:52:10 sshwarts Exp $
///////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////
// //
// Copyright (C) 2001 MandrakeSoft S.A. // Copyright (C) 2001 MandrakeSoft S.A.
@ -582,9 +582,8 @@ void BX_CPU_C::LMSW_Ew(bxInstruction_c *i)
// LMSW does not affect PG,CD,NW,AM,WP,NE,ET bits, and cannot clear PE // LMSW does not affect PG,CD,NW,AM,WP,NE,ET bits, and cannot clear PE
// LMSW cannot clear PE // LMSW cannot clear PE
if ( ((msw & 0x0001)==0) && BX_CPU_THIS_PTR cr0.pe ) { if (BX_CPU_THIS_PTR cr0.pe)
msw |= 0x0001; // adjust PE bit to current value of 1 msw |= 0x0001; // adjust PE bit to current value of 1
}
msw &= 0x000f; // LMSW only affects last 4 flags msw &= 0x000f; // LMSW only affects last 4 flags
cr0 = (BX_CPU_THIS_PTR cr0.val32 & 0xfffffff0) | msw; cr0 = (BX_CPU_THIS_PTR cr0.val32 & 0xfffffff0) | msw;

5
bochs/cpu/protect_ctrl.cc
View File

@ -1,5 +1,5 @@
///////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////
// $Id: protect_ctrl.cc,v 1.30 2004-08-13 20:00:03 sshwarts Exp $ // $Id: protect_ctrl.cc,v 1.31 2004-10-03 21:52:10 sshwarts Exp $
///////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////
// //
// Copyright (C) 2001 MandrakeSoft S.A. // Copyright (C) 2001 MandrakeSoft S.A.
@ -690,9 +690,6 @@ BX_CPU_C::SGDT_Ms(bxInstruction_c *i)
Bit16u limit_16; Bit16u limit_16;
Bit32u base_32; Bit32u base_32;
// ams says it works ok in v8086 mode
// if (v8086_mode()) BX_PANIC(("protect_ctrl: v8086 mode unsupported"));
/* op1 is a register or memory reference */ /* op1 is a register or memory reference */
if (i->modC0()) { if (i->modC0()) {
/* undefined opcode exception */ /* undefined opcode exception */