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c3483a1823
These are bit manipulation functions, so they belong within BitUtils. This also gets rid of duplicated code and avoids relying on compiler reserved names existing or not existing to determine whether or not we define a set of functions. Optimizers are smart enough in GCC and clang to transform the code to a ROR or ROL instruction in the respective functions.
65 lines
1.9 KiB
C++
65 lines
1.9 KiB
C++
// Copyright 2009 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#pragma once
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#include <cstddef>
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#include <string>
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#include "Common/CommonTypes.h"
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// Will fail to compile on a non-array:
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template <typename T, size_t N>
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constexpr size_t ArraySize(T (&arr)[N])
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{
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return N;
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}
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#define b2(x) ((x) | ((x) >> 1))
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#define b4(x) (b2(x) | (b2(x) >> 2))
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#define b8(x) (b4(x) | (b4(x) >> 4))
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#define b16(x) (b8(x) | (b8(x) >> 8))
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#define b32(x) (b16(x) | (b16(x) >> 16))
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#define ROUND_UP_POW2(x) (b32(x - 1) + 1)
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#ifndef _WIN32
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// go to debugger mode
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#define Crash() \
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{ \
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__builtin_trap(); \
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}
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#else // WIN32
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// Function Cross-Compatibility
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#define strcasecmp _stricmp
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#define strncasecmp _strnicmp
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#define unlink _unlink
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#define vscprintf _vscprintf
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// 64 bit offsets for Windows
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#define fseeko _fseeki64
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#define ftello _ftelli64
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#define atoll _atoi64
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#define stat _stat64
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#define fstat _fstat64
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#define fileno _fileno
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extern "C" {
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__declspec(dllimport) void __stdcall DebugBreak(void);
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}
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#define Crash() \
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{ \
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DebugBreak(); \
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}
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#endif // WIN32 ndef
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// Wrapper function to get last strerror(errno) string.
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// This function might change the error code.
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std::string LastStrerrorString();
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#ifdef _WIN32
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// Wrapper function to get GetLastError() string.
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// This function might change the error code.
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std::string GetLastErrorString();
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#endif
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