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463 lines
16 KiB
463 lines
16 KiB
// AsmJit - Machine code generation for C++
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//
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// * Official AsmJit Home Page: https://asmjit.com
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// * Official Github Repository: https://github.com/asmjit/asmjit
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//
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// Copyright (c) 2008-2020 The AsmJit Authors
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would be
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// appreciated but is not required.
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// 2. Altered source versions must be plainly marked as such, and must not be
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// misrepresented as being the original software.
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// 3. This notice may not be removed or altered from any source distribution.
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#ifndef ASMJIT_CORE_GLOBALS_H_INCLUDED
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#define ASMJIT_CORE_GLOBALS_H_INCLUDED
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#include "../core/api-config.h"
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ASMJIT_BEGIN_NAMESPACE
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// ============================================================================
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// [asmjit::Support]
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// ============================================================================
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//! \cond INTERNAL
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//! \addtogroup asmjit_utilities
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//! \{
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namespace Support {
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//! Cast designed to cast between function and void* pointers.
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template<typename Dst, typename Src>
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static inline Dst ptr_cast_impl(Src p) noexcept { return (Dst)p; }
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} // {Support}
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#if defined(ASMJIT_NO_STDCXX)
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namespace Support {
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ASMJIT_INLINE void* operatorNew(size_t n) noexcept { return malloc(n); }
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ASMJIT_INLINE void operatorDelete(void* p) noexcept { if (p) free(p); }
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} // {Support}
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#define ASMJIT_BASE_CLASS(TYPE) \
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ASMJIT_INLINE void* operator new(size_t n) noexcept { \
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return Support::operatorNew(n); \
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} \
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\
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ASMJIT_INLINE void operator delete(void* p) noexcept { \
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Support::operatorDelete(p); \
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} \
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\
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ASMJIT_INLINE void* operator new(size_t, void* p) noexcept { return p; } \
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ASMJIT_INLINE void operator delete(void*, void*) noexcept {}
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#else
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#define ASMJIT_BASE_CLASS(TYPE)
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#endif
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//! \}
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//! \endcond
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// ============================================================================
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// [asmjit::Globals]
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// ============================================================================
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//! \addtogroup asmjit_core
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//! \{
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//! Contains typedefs, constants, and variables used globally by AsmJit.
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namespace Globals {
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// ============================================================================
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// [asmjit::Globals::<global>]
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// ============================================================================
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//! Host memory allocator overhead.
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static constexpr uint32_t kAllocOverhead = uint32_t(sizeof(intptr_t) * 4);
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//! Host memory allocator alignment.
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static constexpr uint32_t kAllocAlignment = 8;
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//! Aggressive growing strategy threshold.
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static constexpr uint32_t kGrowThreshold = 1024 * 1024 * 16;
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//! Maximum depth of RB-Tree is:
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//!
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//! `2 * log2(n + 1)`
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//!
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//! Size of RB node is at least two pointers (without data),
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//! so a theoretical architecture limit would be:
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//!
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//! `2 * log2(addressableMemorySize / sizeof(Node) + 1)`
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//!
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//! Which yields 30 on 32-bit arch and 61 on 64-bit arch.
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//! The final value was adjusted by +1 for safety reasons.
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static constexpr uint32_t kMaxTreeHeight = (ASMJIT_ARCH_BITS == 32 ? 30 : 61) + 1;
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//! Maximum number of operands per a single instruction.
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static constexpr uint32_t kMaxOpCount = 6;
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//! Maximum arguments of a function supported by the Compiler / Function API.
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static constexpr uint32_t kMaxFuncArgs = 16;
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//! The number of values that can be assigned to a single function argument or
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//! return value.
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static constexpr uint32_t kMaxValuePack = 4;
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//! Maximum number of physical registers AsmJit can use per register group.
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static constexpr uint32_t kMaxPhysRegs = 32;
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//! Maximum alignment.
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static constexpr uint32_t kMaxAlignment = 64;
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//! Maximum label or symbol size in bytes.
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static constexpr uint32_t kMaxLabelNameSize = 2048;
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//! Maximum section name size.
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static constexpr uint32_t kMaxSectionNameSize = 35;
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//! Maximum size of comment.
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static constexpr uint32_t kMaxCommentSize = 1024;
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//! Invalid identifier.
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static constexpr uint32_t kInvalidId = 0xFFFFFFFFu;
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//! Returned by `indexOf()` and similar when working with containers that use 32-bit index/size.
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static constexpr uint32_t kNotFound = 0xFFFFFFFFu;
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//! Invalid base address.
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static constexpr uint64_t kNoBaseAddress = ~uint64_t(0);
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// ============================================================================
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// [asmjit::Globals::ResetPolicy]
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// ============================================================================
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//! Reset policy used by most `reset()` functions.
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enum ResetPolicy : uint32_t {
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//! Soft reset, doesn't deallocate memory (default).
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kResetSoft = 0,
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//! Hard reset, releases all memory used, if any.
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kResetHard = 1
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};
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// ============================================================================
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// [asmjit::Globals::Link]
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// ============================================================================
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enum Link : uint32_t {
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kLinkLeft = 0,
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kLinkRight = 1,
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kLinkPrev = 0,
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kLinkNext = 1,
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kLinkFirst = 0,
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kLinkLast = 1,
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kLinkCount = 2
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};
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struct Init_ {};
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struct NoInit_ {};
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static const constexpr Init_ Init {};
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static const constexpr NoInit_ NoInit {};
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} // {Globals}
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// ============================================================================
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// [asmjit::ByteOrder]
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// ============================================================================
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//! Byte order.
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namespace ByteOrder {
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enum : uint32_t {
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kLE = 0,
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kBE = 1,
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kNative = ASMJIT_ARCH_LE ? kLE : kBE,
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kSwapped = ASMJIT_ARCH_LE ? kBE : kLE
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};
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}
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// ============================================================================
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// [asmjit::ptr_as_func / func_as_ptr]
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// ============================================================================
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template<typename Func>
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static inline Func ptr_as_func(void* func) noexcept { return Support::ptr_cast_impl<Func, void*>(func); }
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template<typename Func>
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static inline void* func_as_ptr(Func func) noexcept { return Support::ptr_cast_impl<void*, Func>(func); }
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//! \}
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// ============================================================================
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// [asmjit::Error]
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// ============================================================================
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//! \addtogroup asmjit_error_handling
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//! \{
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//! AsmJit error type (uint32_t).
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typedef uint32_t Error;
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//! AsmJit error codes.
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enum ErrorCode : uint32_t {
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// @EnumValuesBegin{"enum": "ErrorCode"}@
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//! No error (success).
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kErrorOk = 0,
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//! Out of memory.
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kErrorOutOfMemory,
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//! Invalid argument.
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kErrorInvalidArgument,
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//! Invalid state.
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//!
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//! If this error is returned it means that either you are doing something
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//! wrong or AsmJit caught itself by doing something wrong. This error should
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//! never be ignored.
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kErrorInvalidState,
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//! Invalid or incompatible architecture.
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kErrorInvalidArch,
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//! The object is not initialized.
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kErrorNotInitialized,
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//! The object is already initialized.
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kErrorAlreadyInitialized,
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//! Built-in feature was disabled at compile time and it's not available.
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kErrorFeatureNotEnabled,
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//! Too many handles (Windows) or file descriptors (Unix/Posix).
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kErrorTooManyHandles,
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//! Code generated is larger than allowed.
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kErrorTooLarge,
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//! No code generated.
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//!
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//! Returned by runtime if the \ref CodeHolder contains no code.
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kErrorNoCodeGenerated,
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//! Invalid directive.
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kErrorInvalidDirective,
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//! Attempt to use uninitialized label.
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kErrorInvalidLabel,
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//! Label index overflow - a single \ref BaseAssembler instance can hold
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//! almost 2^32 (4 billion) labels. If there is an attempt to create more
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//! labels then this error is returned.
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kErrorTooManyLabels,
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//! Label is already bound.
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kErrorLabelAlreadyBound,
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//! Label is already defined (named labels).
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kErrorLabelAlreadyDefined,
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//! Label name is too long.
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kErrorLabelNameTooLong,
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//! Label must always be local if it's anonymous (without a name).
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kErrorInvalidLabelName,
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//! Parent id passed to \ref CodeHolder::newNamedLabelEntry() was invalid.
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kErrorInvalidParentLabel,
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//! Parent id specified for a non-local (global) label.
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kErrorNonLocalLabelCannotHaveParent,
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//! Invalid section.
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kErrorInvalidSection,
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//! Too many sections (section index overflow).
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kErrorTooManySections,
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//! Invalid section name (most probably too long).
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kErrorInvalidSectionName,
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//! Relocation index overflow (too many relocations).
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kErrorTooManyRelocations,
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//! Invalid relocation entry.
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kErrorInvalidRelocEntry,
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//! Reloc entry contains address that is out of range (unencodable).
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kErrorRelocOffsetOutOfRange,
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//! Invalid assignment to a register, function argument, or function return value.
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kErrorInvalidAssignment,
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//! Invalid instruction.
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kErrorInvalidInstruction,
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//! Invalid register type.
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kErrorInvalidRegType,
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//! Invalid register group.
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kErrorInvalidRegGroup,
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//! Invalid physical register id.
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kErrorInvalidPhysId,
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//! Invalid virtual register id.
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kErrorInvalidVirtId,
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//! Invalid element index (ARM).
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kErrorInvalidElementIndex,
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//! Invalid prefix combination (X86|X64).
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kErrorInvalidPrefixCombination,
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//! Invalid LOCK prefix (X86|X64).
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kErrorInvalidLockPrefix,
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//! Invalid XACQUIRE prefix (X86|X64).
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kErrorInvalidXAcquirePrefix,
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//! Invalid XRELEASE prefix (X86|X64).
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kErrorInvalidXReleasePrefix,
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//! Invalid REP prefix (X86|X64).
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kErrorInvalidRepPrefix,
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//! Invalid REX prefix (X86|X64).
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kErrorInvalidRexPrefix,
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//! Invalid {...} register (X86|X64).
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kErrorInvalidExtraReg,
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//! Invalid {k} use (not supported by the instruction) (X86|X64).
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kErrorInvalidKMaskUse,
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//! Invalid {k}{z} use (not supported by the instruction) (X86|X64).
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kErrorInvalidKZeroUse,
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//! Invalid broadcast - Currently only related to invalid use of AVX-512 {1tox} (X86|X64).
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kErrorInvalidBroadcast,
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//! Invalid 'embedded-rounding' {er} or 'suppress-all-exceptions' {sae} (AVX-512) (X86|X64).
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kErrorInvalidEROrSAE,
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//! Invalid address used (not encodable).
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kErrorInvalidAddress,
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//! Invalid index register used in memory address (not encodable).
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kErrorInvalidAddressIndex,
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//! Invalid address scale (not encodable).
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kErrorInvalidAddressScale,
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//! Invalid use of 64-bit address.
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kErrorInvalidAddress64Bit,
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//! Invalid use of 64-bit address that require 32-bit zero-extension (X64).
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kErrorInvalidAddress64BitZeroExtension,
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//! Invalid displacement (not encodable).
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kErrorInvalidDisplacement,
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//! Invalid segment (X86).
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kErrorInvalidSegment,
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//! Invalid immediate (out of bounds on X86 and invalid pattern on ARM).
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kErrorInvalidImmediate,
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//! Invalid operand size.
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kErrorInvalidOperandSize,
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//! Ambiguous operand size (memory has zero size while it's required to determine the operation type.
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kErrorAmbiguousOperandSize,
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//! Mismatching operand size (size of multiple operands doesn't match the operation size).
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kErrorOperandSizeMismatch,
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//! Invalid option.
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kErrorInvalidOption,
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//! Option already defined.
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kErrorOptionAlreadyDefined,
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//! Invalid TypeId.
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kErrorInvalidTypeId,
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//! Invalid use of a 8-bit GPB-HIGH register.
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kErrorInvalidUseOfGpbHi,
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//! Invalid use of a 64-bit GPQ register in 32-bit mode.
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kErrorInvalidUseOfGpq,
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//! Invalid use of an 80-bit float (\ref Type::kIdF80).
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kErrorInvalidUseOfF80,
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//! Some registers in the instruction muse be consecutive (some ARM and AVX512
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//! neural-net instructions).
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kErrorNotConsecutiveRegs,
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//! Illegal virtual register - reported by instruction validation.
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kErrorIllegalVirtReg,
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//! AsmJit cannot create more virtual registers.
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kErrorTooManyVirtRegs,
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//! AsmJit requires a physical register, but no one is available.
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kErrorNoMorePhysRegs,
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//! A variable has been assigned more than once to a function argument (BaseCompiler).
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kErrorOverlappedRegs,
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//! Invalid register to hold stack arguments offset.
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kErrorOverlappingStackRegWithRegArg,
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//! Unbound label cannot be evaluated by expression.
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kErrorExpressionLabelNotBound,
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//! Arithmetic overflow during expression evaluation.
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kErrorExpressionOverflow,
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//! Failed to open anonymous memory handle or file descriptor.
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kErrorFailedToOpenAnonymousMemory,
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// @EnumValuesEnd@
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//! Count of AsmJit error codes.
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kErrorCount
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};
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// ============================================================================
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// [asmjit::DebugUtils]
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// ============================================================================
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//! Debugging utilities.
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namespace DebugUtils {
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//! \cond INTERNAL
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//! Used to silence warnings about unused arguments or variables.
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template<typename... Args>
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static ASMJIT_INLINE void unused(Args&&...) noexcept {}
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//! \endcond
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//! Returns the error `err` passed.
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//!
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//! Provided for debugging purposes. Putting a breakpoint inside `errored` can
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//! help with tracing the origin of any error reported / returned by AsmJit.
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static constexpr Error errored(Error err) noexcept { return err; }
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//! Returns a printable version of `asmjit::Error` code.
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ASMJIT_API const char* errorAsString(Error err) noexcept;
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//! Called to output debugging message(s).
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ASMJIT_API void debugOutput(const char* str) noexcept;
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//! Called on assertion failure.
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//!
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//! \param file Source file name where it happened.
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//! \param line Line in the source file.
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//! \param msg Message to display.
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//!
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//! If you have problems with assertion failures a breakpoint can be put
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//! at \ref assertionFailed() function (asmjit/core/globals.cpp). A call stack
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//! will be available when such assertion failure is triggered. AsmJit always
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//! returns errors on failures, assertions are a last resort and usually mean
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//! unrecoverable state due to out of range array access or totally invalid
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//! arguments like nullptr where a valid pointer should be provided, etc...
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ASMJIT_API void ASMJIT_NORETURN assertionFailed(const char* file, int line, const char* msg) noexcept;
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} // {DebugUtils}
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//! \def ASMJIT_ASSERT(...)
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//!
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//! AsmJit's own assert macro used in AsmJit code-base.
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#if defined(ASMJIT_BUILD_DEBUG)
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#define ASMJIT_ASSERT(...) \
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do { \
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if (ASMJIT_LIKELY(__VA_ARGS__)) \
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break; \
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::asmjit::DebugUtils::assertionFailed(__FILE__, __LINE__, #__VA_ARGS__); \
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} while (0)
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#else
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#define ASMJIT_ASSERT(...) ((void)0)
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#endif
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//! \def ASMJIT_PROPAGATE(...)
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//!
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//! Propagates a possible `Error` produced by `...` to the caller by returning
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//! the error immediately. Used by AsmJit internally, but kept public for users
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//! that want to use the same technique to propagate errors to the caller.
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#define ASMJIT_PROPAGATE(...) \
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do { \
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::asmjit::Error _err = __VA_ARGS__; \
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if (ASMJIT_UNLIKELY(_err)) \
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return _err; \
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} while (0)
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//! \}
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ASMJIT_END_NAMESPACE
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#endif // ASMJIT_CORE_GLOBALS_H_INCLUDED
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