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Fail* directories reorganized, Code-cleanup (-> coding-style), Typos+comments fixed.

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git-svn-id: https://www4.informatik.uni-erlangen.de/i4svn/danceos/trunk/devel/fail@1321 8c4709b5-6ec9-48aa-a5cd-a96041d1645a
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adrian
2012-06-08 20:09:43 +00:00
parent d474a5b952
commit 2575604b41
866 changed files with 1848 additions and 1879 deletions
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174
simulators/bochs/fpu/fpu_const.cc Executable file
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/////////////////////////////////////////////////////////////////////////
// $Id$
/////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2003-2009 Stanislav Shwartsman
// Written by Stanislav Shwartsman [sshwarts at sourceforge net]
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
//
/////////////////////////////////////////////////////////////////////////
#define NEED_CPU_REG_SHORTCUTS 1
#include "bochs.h"
#include "cpu/cpu.h"
#define LOG_THIS BX_CPU_THIS_PTR
#if BX_SUPPORT_FPU
#include "softfloatx80.h"
const floatx80 Const_QNaN = packFloatx80(0, floatx80_default_nan_exp, floatx80_default_nan_fraction);
const floatx80 Const_Z = packFloatx80(0, 0x0000, 0);
const floatx80 Const_1 = packFloatx80(0, 0x3fff, BX_CONST64(0x8000000000000000));
const floatx80 Const_L2T = packFloatx80(0, 0x4000, BX_CONST64(0xd49a784bcd1b8afe));
const floatx80 Const_L2E = packFloatx80(0, 0x3fff, BX_CONST64(0xb8aa3b295c17f0bc));
const floatx80 Const_PI = packFloatx80(0, 0x4000, BX_CONST64(0xc90fdaa22168c235));
const floatx80 Const_LG2 = packFloatx80(0, 0x3ffd, BX_CONST64(0x9a209a84fbcff799));
const floatx80 Const_LN2 = packFloatx80(0, 0x3ffe, BX_CONST64(0xb17217f7d1cf79ac));
const floatx80 Const_INF = packFloatx80(0, 0x7fff, BX_CONST64(0x8000000000000000));
/* A fast way to find out whether x is one of RC_DOWN or RC_CHOP
(and not one of RC_RND or RC_UP).
*/
#define DOWN_OR_CHOP() (FPU_CONTROL_WORD & FPU_CW_RC & FPU_RC_DOWN)
BX_CPP_INLINE floatx80 FPU_round_const(const floatx80 &a, int adj)
{
floatx80 result = a;
result.fraction += adj;
return result;
}
void BX_CPP_AttrRegparmN(1) BX_CPU_C::FLDL2T(bxInstruction_c *i)
{
BX_CPU_THIS_PTR prepareFPU(i);
BX_CPU_THIS_PTR FPU_update_last_instruction(i);
clear_C1();
if (! IS_TAG_EMPTY(-1))
{
FPU_stack_overflow();
}
else {
BX_CPU_THIS_PTR the_i387.FPU_push();
BX_WRITE_FPU_REG(FPU_round_const(Const_L2T, (FPU_CONTROL_WORD & FPU_CW_RC) == FPU_RC_UP), 0);
}
}
void BX_CPP_AttrRegparmN(1) BX_CPU_C::FLDL2E(bxInstruction_c *i)
{
BX_CPU_THIS_PTR prepareFPU(i);
BX_CPU_THIS_PTR FPU_update_last_instruction(i);
clear_C1();
if (! IS_TAG_EMPTY(-1))
{
FPU_stack_overflow();
}
else {
BX_CPU_THIS_PTR the_i387.FPU_push();
BX_WRITE_FPU_REG(FPU_round_const(Const_L2E, DOWN_OR_CHOP() ? -1 : 0), 0);
}
}
void BX_CPP_AttrRegparmN(1) BX_CPU_C::FLDPI(bxInstruction_c *i)
{
BX_CPU_THIS_PTR prepareFPU(i);
BX_CPU_THIS_PTR FPU_update_last_instruction(i);
clear_C1();
if (! IS_TAG_EMPTY(-1))
{
FPU_stack_overflow();
}
else {
BX_CPU_THIS_PTR the_i387.FPU_push();
BX_WRITE_FPU_REG(FPU_round_const(Const_PI, DOWN_OR_CHOP() ? -1 : 0), 0);
}
}
void BX_CPP_AttrRegparmN(1) BX_CPU_C::FLDLG2(bxInstruction_c *i)
{
BX_CPU_THIS_PTR prepareFPU(i);
BX_CPU_THIS_PTR FPU_update_last_instruction(i);
clear_C1();
if (! IS_TAG_EMPTY(-1))
{
FPU_stack_overflow();
}
else {
BX_CPU_THIS_PTR the_i387.FPU_push();
BX_WRITE_FPU_REG(FPU_round_const(Const_LG2, DOWN_OR_CHOP() ? -1 : 0), 0);
}
}
void BX_CPP_AttrRegparmN(1) BX_CPU_C::FLDLN2(bxInstruction_c *i)
{
BX_CPU_THIS_PTR prepareFPU(i);
BX_CPU_THIS_PTR FPU_update_last_instruction(i);
clear_C1();
if (! IS_TAG_EMPTY(-1))
{
FPU_stack_overflow();
}
else {
BX_CPU_THIS_PTR the_i387.FPU_push();
BX_WRITE_FPU_REG(FPU_round_const(Const_LN2, DOWN_OR_CHOP() ? -1 : 0), 0);
}
}
void BX_CPP_AttrRegparmN(1) BX_CPU_C::FLD1(bxInstruction_c *i)
{
BX_CPU_THIS_PTR prepareFPU(i);
BX_CPU_THIS_PTR FPU_update_last_instruction(i);
clear_C1();
if (! IS_TAG_EMPTY(-1))
{
FPU_stack_overflow();
}
else {
BX_CPU_THIS_PTR the_i387.FPU_push();
BX_WRITE_FPU_REG(Const_1, 0);
}
}
void BX_CPP_AttrRegparmN(1) BX_CPU_C::FLDZ(bxInstruction_c *i)
{
BX_CPU_THIS_PTR prepareFPU(i);
BX_CPU_THIS_PTR FPU_update_last_instruction(i);
clear_C1();
if (! IS_TAG_EMPTY(-1))
{
FPU_stack_overflow();
}
else {
BX_CPU_THIS_PTR the_i387.FPU_push();
BX_WRITE_FPU_REG(Const_Z, 0);
}
}
#endif