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Implemented FXSAVE/FXRSTOR for FOO/FIP/FDP fields

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This commit is contained in:
Stanislav Shwartsman 2006-04-23 16:01:34 +00:00
parent ff02bc8ef0
commit 44afbdcd82
1 changed files with 69 additions and 22 deletions
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89
bochs/cpu/sse_move.cc
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@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: sse_move.cc,v 1.49 2006-03-06 22:03:04 sshwarts Exp $
// $Id: sse_move.cc,v 1.50 2006-04-23 16:01:34 sshwarts Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2003 Stanislav Shwartsman
@ -127,31 +127,53 @@ void BX_CPU_C::FXSAVE(bxInstruction_c *i)
/* x87 FPU Opcode (16 bits) */
/* The lower 11 bits contain the FPU opcode, upper 5 bits are reserved */
xmm.xmm16u(3) = 0; /* still not implemented */
xmm.xmm16u(3) = BX_CPU_THIS_PTR the_i387.foo;
/*
* x87 FPU IP Offset (32 bits)
* x87 FPU IP Offset (32/64 bits)
* The contents of this field differ depending on the current
* addressing mode (16/32 bit) when the FXSAVE instruction was executed:
* + 32-bit mode-32-bit IP offset
* + 16-bit mode-low 16 bits are IP offset; high 16 bits are reserved.
*
* x87 CS FPU IP Selector (16 bits)
* addressing mode (16/32/64 bit) when the FXSAVE instruction was executed:
* + 64-bit mode - 64-bit IP offset
* + 32-bit mode - 32-bit IP offset
* + 16-bit mode - low 16 bits are IP offset; high 16 bits are reserved.
* x87 CS FPU IP Selector
* + 16 bit, in 16/32 bit mode only
*/
xmm.xmm64u(1) = 0; /* still not implemented */
#if BX_SUPPORT_X86_64
if (i->os64L()) /* 64 bit operand size mode */
{
xmm.xmm64u(1) = BX_CPU_THIS_PTR the_i387.fip;
}
else
#endif
{
xmm.xmm32u(2) = (BX_CPU_THIS_PTR the_i387.fip) & 0xffffffff;
xmm.xmm32u(3) = (BX_CPU_THIS_PTR the_i387.fcs);
}
writeVirtualDQwordAligned(i->seg(), RMAddr(i), (Bit8u *) &xmm);
/*
* x87 FPU Instruction Operand (Data) Pointer Offset (32 bits)
* x87 FPU Instruction Operand (Data) Pointer Offset (32/64 bits)
* The contents of this field differ depending on the current
* addressing mode (16/32 bit) when the FXSAVE instruction was executed:
* + 32-bit mode-32-bit offset
* + 16-bit mode-low 16 bits are offset; high 16 bits are reserved.
*
* x87 DS FPU Instruction Operand (Data) Pointer Selector (16 bits)
* + 64-bit mode - 64-bit offset
* + 32-bit mode - 32-bit offset
* + 16-bit mode - low 16 bits are offset; high 16 bits are reserved.
* x87 DS FPU Instruction Operand (Data) Pointer Selector
* + 16 bit, in 16/32 bit mode only
*/
xmm.xmm64u(0) = 0; /* still not implemented */
#if BX_SUPPORT_X86_64
if (i->os64L()) /* 64 bit operand size mode */
{
xmm.xmm64u(0) = BX_CPU_THIS_PTR the_i387.fdp;
}
else
#endif
{
xmm.xmm32u(0) = (BX_CPU_THIS_PTR the_i387.fdp) & 0xffffffff;
xmm.xmm32u(1) = (BX_CPU_THIS_PTR the_i387.fds);
}
#if BX_SUPPORT_SSE >= 1
xmm.xmm32u(2) = BX_MXCSR_REGISTER;
@ -214,19 +236,45 @@ void BX_CPU_C::FXRSTOR(bxInstruction_c *i)
BX_CPU_THIS_PTR the_i387.swd = xmm.xmm16u(1);
BX_CPU_THIS_PTR the_i387.tos = (xmm.xmm16u(1) >> 11) & 0x07;
/* FOO/FPU IP restore still not implemented */
/* Restore x87 FPU Opcode */
/* The lower 11 bits contain the FPU opcode, upper 5 bits are reserved */
BX_CPU_THIS_PTR the_i387.foo = xmm.xmm16u(3) & 0x7FF;
/* Restore x87 FPU IP */
#if BX_SUPPORT_X86_64
if (i->os64L()) /* 64 bit operand size mode */
{
BX_CPU_THIS_PTR the_i387.fip = xmm.xmm64u(1);
}
else
#endif
{
BX_CPU_THIS_PTR the_i387.fip = xmm.xmm32u(2);
BX_CPU_THIS_PTR the_i387.fcs = xmm.xmm16u(5);;
}
Bit32u twd = 0, tag_byte = xmm.xmm16u(2);
/* FPU DP restore still not implemented */
/* Restore x87 FPU DP */
readVirtualDQwordAligned(i->seg(), RMAddr(i) + 16, (Bit8u *) &xmm);
#if BX_SUPPORT_X86_64
if (i->os64L()) /* 64 bit operand size mode */
{
BX_CPU_THIS_PTR the_i387.fdp = xmm.xmm64u(0);
}
else
#endif
{
BX_CPU_THIS_PTR the_i387.fdp = xmm.xmm32u(0);
BX_CPU_THIS_PTR the_i387.fds = xmm.xmm16u(2);
}
#if BX_SUPPORT_SSE >= 1
/* If the OSFXSR bit in CR4 is not set, the FXRSTOR instruction does
not restore the states of the XMM and MXCSR registers. */
if(BX_CPU_THIS_PTR cr4.get_OSFXSR())
{
readVirtualDQwordAligned(i->seg(), RMAddr(i) + 16, (Bit8u *) &xmm);
Bit32u new_mxcsr = xmm.xmm32u(2);
if(new_mxcsr & ~MXCSR_MASK)
exception(BX_GP_EXCEPTION, 0, 0);
@ -238,8 +286,7 @@ void BX_CPU_C::FXRSTOR(bxInstruction_c *i)
/* load i387 register file */
for(index=0; index < 8; index++)
{
read_virtual_tword(i->seg(),
RMAddr(i)+index*16+32, &(BX_FPU_REG(index)));
read_virtual_tword(i->seg(), RMAddr(i)+index*16+32, &(BX_FPU_REG(index)));
}
/* FTW