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Theodosius/Examples/Theodosius-Usermode/asmjit/core/archtraits.cpp

156 lines
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4 years ago
// AsmJit - Machine code generation for C++
//
// * Official AsmJit Home Page: https://asmjit.com
// * Official Github Repository: https://github.com/asmjit/asmjit
//
// Copyright (c) 2008-2020 The AsmJit Authors
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would be
// appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
// misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.
#include "../core/api-build_p.h"
#include "../core/archtraits.h"
#include "../core/misc_p.h"
#ifdef ASMJIT_BUILD_X86
#include "../x86/x86archtraits_p.h"
#endif
#ifdef ASMJIT_BUILD_ARM
#include "../arm/armarchtraits_p.h"
#endif
ASMJIT_BEGIN_NAMESPACE
// ============================================================================
// [asmjit::ArchTraits]
// ============================================================================
static const constexpr ArchTraits noArchTraits = {
0xFF, // SP.
0xFF, // FP.
0xFF, // LR.
0xFF, // PC.
{ 0, 0, 0 }, // Reserved.
0, // HW stack alignment.
0, // Min stack offset.
0, // Max stack offset.
{ 0, 0, 0, 0}, // ISA features [Gp, Vec, Other0, Other1].
{ { 0 } }, // RegTypeToSignature.
{ 0 }, // RegTypeToTypeId.
{ 0 } // TypeIdToRegType.
};
ASMJIT_VARAPI const ArchTraits _archTraits[Environment::kArchCount] = {
// No architecture.
noArchTraits,
// X86/X86 architectures.
#ifdef ASMJIT_BUILD_X86
x86::x86ArchTraits,
x86::x64ArchTraits,
#else
noArchTraits,
noArchTraits,
#endif
// RISCV32/RISCV64 architectures.
noArchTraits,
noArchTraits,
// ARM architecture
noArchTraits,
// AArch64 architecture.
#ifdef ASMJIT_BUILD_ARM
arm::a64ArchTraits,
#else
noArchTraits,
#endif
// ARM/Thumb architecture.
noArchTraits,
// Reserved.
noArchTraits,
// MIPS32/MIPS64
noArchTraits,
noArchTraits
};
// ============================================================================
// [asmjit::ArchUtils]
// ============================================================================
ASMJIT_FAVOR_SIZE Error ArchUtils::typeIdToRegInfo(uint32_t arch, uint32_t typeId, uint32_t* typeIdOut, RegInfo* regInfoOut) noexcept {
const ArchTraits& archTraits = ArchTraits::byArch(arch);
// Passed RegType instead of TypeId?
if (typeId <= BaseReg::kTypeMax)
typeId = archTraits.regTypeToTypeId(typeId);
if (ASMJIT_UNLIKELY(!Type::isValid(typeId)))
return DebugUtils::errored(kErrorInvalidTypeId);
// First normalize architecture dependent types.
if (Type::isAbstract(typeId)) {
bool is32Bit = Environment::is32Bit(arch);
if (typeId == Type::kIdIntPtr)
typeId = is32Bit ? Type::kIdI32 : Type::kIdI64;
else
typeId = is32Bit ? Type::kIdU32 : Type::kIdU64;
}
// Type size helps to construct all groups of registers.
// TypeId is invalid if the size is zero.
uint32_t size = Type::sizeOf(typeId);
if (ASMJIT_UNLIKELY(!size))
return DebugUtils::errored(kErrorInvalidTypeId);
if (ASMJIT_UNLIKELY(typeId == Type::kIdF80))
return DebugUtils::errored(kErrorInvalidUseOfF80);
uint32_t regType = 0;
if (typeId >= Type::_kIdBaseStart && typeId < Type::_kIdVec32Start) {
regType = archTraits._typeIdToRegType[typeId - Type::_kIdBaseStart];
if (!regType) {
if (typeId == Type::kIdI64 || typeId == Type::kIdU64)
return DebugUtils::errored(kErrorInvalidUseOfGpq);
else
return DebugUtils::errored(kErrorInvalidTypeId);
}
}
else {
if (size <= 8 && archTraits._regInfo[BaseReg::kTypeVec64].isValid())
regType = BaseReg::kTypeVec64;
else if (size <= 16 && archTraits._regInfo[BaseReg::kTypeVec128].isValid())
regType = BaseReg::kTypeVec128;
else if (size == 32 && archTraits._regInfo[BaseReg::kTypeVec256].isValid())
regType = BaseReg::kTypeVec256;
else if (archTraits._regInfo[BaseReg::kTypeVec512].isValid())
regType = BaseReg::kTypeVec512;
else
return DebugUtils::errored(kErrorInvalidTypeId);
}
*typeIdOut = typeId;
regInfoOut->reset(archTraits.regTypeToSignature(regType));
return kErrorOk;
}
ASMJIT_END_NAMESPACE