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UserspaceEmulator: Move to using the new SoftFPU

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Hendiadyoin1 2021-07-10 16:21:06 +02:00 • committed by Andreas Kling
parent 45d0f84a27
commit 7da12f0faf
3 changed files with 202 additions and 867 deletions
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3
Userland/DevTools/UserspaceEmulator/CMakeLists.txt
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@ -14,9 +14,12 @@ set(SOURCES
Region.cpp
SimpleRegion.cpp
SoftCPU.cpp
SoftFPU.cpp
SoftMMU.cpp
main.cpp
)
add_compile_options(-mmmx)
serenity_bin(UserspaceEmulator)
target_link_libraries(UserspaceEmulator LibX86 LibDebug LibCore LibPthread LibLine)

1016
Userland/DevTools/UserspaceEmulator/SoftCPU.cpp
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50
Userland/DevTools/UserspaceEmulator/SoftCPU.h
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@ -7,6 +7,7 @@
#pragma once
#include "Region.h"
#include "SoftFPU.h"
#include "ValueWithShadow.h"
#include <AK/ByteReader.h>
#include <LibX86/Instruction.h>
@ -35,6 +36,8 @@ union PartAddressableRegister {
class SoftCPU final
: public X86::Interpreter
, public X86::InstructionStream {
friend SoftFPU;
public:
using ValueWithShadowType8 = ValueWithShadow<u8>;
using ValueWithShadowType16 = ValueWithShadow<u16>;
@ -264,6 +267,10 @@ public:
ValueWithShadow<u8> dl() const { return const_gpr8(X86::RegisterDL); }
ValueWithShadow<u8> dh() const { return const_gpr8(X86::RegisterDH); }
long double fpu_get(u8 index) const { return m_fpu.fpu_get(index); }
long double fpu_pop() { return m_fpu.fpu_pop(); }
MMX mmx_get(u8 index) const { return m_fpu.mmx_get(index); };
void set_eax(ValueWithShadow<u32> value) { gpr32(X86::RegisterEAX) = value; }
void set_ebx(ValueWithShadow<u32> value) { gpr32(X86::RegisterEBX) = value; }
void set_ecx(ValueWithShadow<u32> value) { gpr32(X86::RegisterECX) = value; }
@ -291,6 +298,10 @@ public:
void set_dl(ValueWithShadow<u8> value) { gpr8(X86::RegisterDL) = value; }
void set_dh(ValueWithShadow<u8> value) { gpr8(X86::RegisterDH) = value; }
void fpu_push(long double value) { m_fpu.fpu_push(value); }
void fpu_set(u8 index, long double value) { m_fpu.fpu_set(index, value); }
void mmx_set(u8 index, MMX value) { m_fpu.mmx_set(index, value); }
bool of() const { return m_eflags & Flags::OF; }
bool sf() const { return m_eflags & Flags::SF; }
bool zf() const { return m_eflags & Flags::ZF; }
@ -1160,6 +1171,7 @@ private:
private:
Emulator& m_emulator;
SoftFPU m_fpu;
PartAddressableRegister m_gpr[8];
PartAddressableRegister m_gpr_shadow[8];
@ -1172,44 +1184,6 @@ private:
u32 m_eip { 0 };
u32 m_base_eip { 0 };
long double m_fpu[8];
// FIXME: Shadow for m_fpu.
// FIXME: Use bits 11 to 13 in the FPU status word for this.
int m_fpu_top { -1 };
void fpu_push(long double n)
{
++m_fpu_top;
fpu_set(0, n);
}
long double fpu_pop()
{
auto n = fpu_get(0);
m_fpu_top--;
return n;
}
long double fpu_get(int i)
{
VERIFY(i >= 0 && i <= m_fpu_top);
return m_fpu[m_fpu_top - i];
}
void fpu_set(int i, long double n)
{
VERIFY(i >= 0 && i <= m_fpu_top);
m_fpu[m_fpu_top - i] = n;
}
// FIXME: Or just something like m_flags_tainted?
ValueWithShadow<u16> m_fpu_cw { 0, 0 };
// FIXME: Make FPU/MMX memory its own struct
// FIXME: FPU Status word
// FIXME: FPU Tag Word
// FIXME: FPU Data Pointer
// FIXME: FPU Instruction Pointer ?
// FIXME: FPU Last OP Code ?
Region* m_cached_code_region { nullptr };
u8* m_cached_code_base_ptr { nullptr };
};