ec1ff39a5f
The 64-bit code got >10% speedup, the 32-bit code also got about 2% because laddr cacluation optimization
150 lines
4.2 KiB
C++
150 lines
4.2 KiB
C++
/////////////////////////////////////////////////////////////////////////
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// $Id: stack64.cc,v 1.41 2008-05-10 18:10:53 sshwarts Exp $
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2001 MandrakeSoft S.A.
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//
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// MandrakeSoft S.A.
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// 43, rue d'Aboukir
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// 75002 Paris - France
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// http://www.linux-mandrake.com/
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// http://www.mandrakesoft.com/
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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/////////////////////////////////////////////////////////////////////////
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#define NEED_CPU_REG_SHORTCUTS 1
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#include "bochs.h"
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#include "cpu.h"
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#define LOG_THIS BX_CPU_THIS_PTR
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#if BX_SUPPORT_X86_64
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void BX_CPP_AttrRegparmN(1) BX_CPU_C::POP_EqM(bxInstruction_c *i)
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{
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BX_CPU_THIS_PTR speculative_rsp = 1;
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BX_CPU_THIS_PTR prev_rsp = RSP;
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Bit64u val64 = pop_64();
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// Note: there is one little weirdism here. It is possible to use
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// RSP in the modrm addressing. If used, the value of RSP after the
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// pop is used to calculate the address.
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BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
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write_virtual_qword_64(i->seg(), RMAddr(i), val64);
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BX_CPU_THIS_PTR speculative_rsp = 0;
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}
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void BX_CPP_AttrRegparmN(1) BX_CPU_C::PUSH_RRX(bxInstruction_c *i)
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{
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push_64(BX_READ_64BIT_REG(i->opcodeReg()));
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}
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void BX_CPP_AttrRegparmN(1) BX_CPU_C::POP_RRX(bxInstruction_c *i)
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{
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BX_WRITE_64BIT_REG(i->opcodeReg(), pop_64());
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}
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void BX_CPP_AttrRegparmN(1) BX_CPU_C::PUSH64_FS(bxInstruction_c *i)
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{
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push_64(BX_CPU_THIS_PTR sregs[BX_SEG_REG_FS].selector.value);
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}
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void BX_CPP_AttrRegparmN(1) BX_CPU_C::PUSH64_GS(bxInstruction_c *i)
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{
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push_64(BX_CPU_THIS_PTR sregs[BX_SEG_REG_GS].selector.value);
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}
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void BX_CPP_AttrRegparmN(1) BX_CPU_C::POP64_FS(bxInstruction_c *i)
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{
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// this way is faster and RSP safe
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Bit64u fs = read_virtual_qword_64(BX_SEG_REG_SS, RSP);
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load_seg_reg(&BX_CPU_THIS_PTR sregs[BX_SEG_REG_FS], (Bit16u) fs);
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RSP += 8;
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}
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void BX_CPP_AttrRegparmN(1) BX_CPU_C::POP64_GS(bxInstruction_c *i)
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{
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// this way is faster and RSP safe
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Bit64u gs = read_virtual_qword_64(BX_SEG_REG_SS, RSP);
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load_seg_reg(&BX_CPU_THIS_PTR sregs[BX_SEG_REG_GS], (Bit16u) gs);
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RSP += 8;
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}
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void BX_CPP_AttrRegparmN(1) BX_CPU_C::PUSH64_Id(bxInstruction_c *i)
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{
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Bit64u imm64 = (Bit32s) i->Id();
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push_64(imm64);
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}
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void BX_CPP_AttrRegparmN(1) BX_CPU_C::PUSH_EqM(bxInstruction_c *i)
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{
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BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
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Bit64u op1_64 = read_virtual_qword_64(i->seg(), RMAddr(i));
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push_64(op1_64);
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}
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void BX_CPP_AttrRegparmN(1) BX_CPU_C::ENTER64_IwIb(bxInstruction_c *i)
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{
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Bit8u level = i->Ib2();
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level &= 0x1F;
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BX_CPU_THIS_PTR speculative_rsp = 1;
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BX_CPU_THIS_PTR prev_rsp = RSP;
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push_64(RBP);
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Bit64u frame_ptr64 = RSP;
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if (level > 0) {
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/* do level-1 times */
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while (--level) {
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RBP -= 8;
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Bit64u temp64 = read_virtual_qword_64(BX_SEG_REG_SS, RBP);
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RSP -= 8;
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write_virtual_qword_64(BX_SEG_REG_SS, RSP, temp64);
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} /* while (--level) */
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/* push(frame pointer) */
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RSP -= 8;
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write_virtual_qword_64(BX_SEG_REG_SS, RSP, frame_ptr64);
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} /* if (level > 0) ... */
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RSP -= i->Iw();
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// ENTER finishes with memory write check on the final stack pointer
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// the memory is touched but no write actually occurs
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// emulate it by doing RMW read access from SS:RSP
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read_RMW_virtual_qword_64(BX_SEG_REG_SS, RSP);
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RBP = frame_ptr64;
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BX_CPU_THIS_PTR speculative_rsp = 0;
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}
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void BX_CPP_AttrRegparmN(1) BX_CPU_C::LEAVE64(bxInstruction_c *i)
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{
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// restore frame pointer
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Bit64u temp64 = read_virtual_qword_64(BX_SEG_REG_SS, RBP);
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RSP = RBP + 8;
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RBP = temp64;
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}
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#endif /* if BX_SUPPORT_X86_64 */
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