forked from 0ad/0ad
janwas
7a5655edde
cpu.cpp: avoided the need for wrapper functions by calling the OS-specific function directly (declared in central header, implemented in the platform's cpp file) avoid the need for init in cpu and ia32 via if(!init) Init() pattern. optimized memcpy now requires SSE support remove error-prone CAS macro; replace with cpu_CAS config: no longer require inline asm for float->int conversions lib_error: remove special-case in CHECK_ERR for windows (no longer needed) This was SVN commit r5365.
433 lines
11 KiB
C
433 lines
11 KiB
C
/**
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* =========================================================================
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* File : config.h
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* Project : 0 A.D.
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* Description : compile-time configuration and capability detection.
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* =========================================================================
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*/
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// license: GPL; see lib/license.txt
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#ifndef INCLUDED_CONFIG
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#define INCLUDED_CONFIG
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// the config/have macros are always defined; their values (1 or 0) are
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// tested with #if instead of #ifdef.
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// this protects user code from typos such as #ifdef _MSC_VEER, which
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// would silently remove code. instead, we will at least get "test of
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// undefined macro" warnings here. not including this header also triggers
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// such warnings, but won't happen often because we're included from PCH.
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//-----------------------------------------------------------------------------
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// user-specified configuration choices
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//-----------------------------------------------------------------------------
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// allow override via compiler settings by checking #ifndef.
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// omit frame pointers - stack frames will not be generated, which
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// improves performance but makes walking the stack harder.
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// this is acted upon by #pragmas in sysdep.h.
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#ifndef CONFIG_OMIT_FP
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# ifdef NDEBUG
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# define CONFIG_OMIT_FP 1
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# else
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# define CONFIG_OMIT_FP 0
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# endif
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#endif
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// (only applicable if CPU_IA32) 64-bit values will be returned in EDX:EAX.
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// this chiefly affects ia32_rdtsc. if not set, a safer but slower fallback
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// will be used that doesn't assume anything about return convention.
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#ifndef CONFIG_RETURN64_EDX_EAX
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# define CONFIG_RETURN64_EDX_EAX 1
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#endif
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// allow use of RDTSC for raw tick counts (otherwise, the slower but
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// more reliable on MP systems wall-clock will be used).
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#ifndef CONFIG_TIMER_ALLOW_RDTSC
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# if CPU_IA32
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# define CONFIG_TIMER_ALLOW_RDTSC 1
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# else
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# define CONFIG_TIMER_ALLOW_RDTSC 0
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# endif
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#endif
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// this enables/disables the actual checking done by OverrunProtector-s
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// (quite slow, entailing mprotect() before/after each access).
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// define to 1 here or in the relevant module if you suspect mem corruption.
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// we provide this option because OverrunProtector requires some changes to
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// the object being wrapped, and we want to leave those intact but not
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// significantly slow things down except when needed.
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#ifndef CONFIG_OVERRUN_PROTECTION
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# define CONFIG_OVERRUN_PROTECTION 0
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#endif
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// enable memory tracking (slow). see mmgr.cpp.
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#ifndef CONFIG_USE_MMGR
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# define CONFIG_USE_MMGR 0
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#endif
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// enable additional debug checks (very slow).
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#ifndef CONFIG_PARANOIA
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# define CONFIG_PARANOIA 0
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#endif
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// finale release; disables some safety checks.
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#ifndef CONFIG_FINAL
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# define CONFIG_FINAL 0
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#endif
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// enable trace output for low-level code - various functions will
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// debug_printf when they are entered/exited. note that the appropriate
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// TRACEn tags must be debug_filter_add-ed for this to have any effect.
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#ifndef CONFIG_TRACE
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# define CONFIG_TRACE 0
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#endif
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// try to prevent any exceptions from being thrown - even by the C++
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// standard library. useful only for performance tests.
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#ifndef CONFIG_DISABLE_EXCEPTIONS
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# define CONFIG_DISABLE_EXCEPTIONS 0
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#endif
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//-----------------------------------------------------------------------------
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// auto-detect OS and platform via predefined macros
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//-----------------------------------------------------------------------------
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// rationale:
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// - these macros have consistent names and numerical values; using
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// them saves other code from having to know the obscure predefined macros.
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// - we'd like to use #if/#elif/#endif chains for e.g. OS_* to allow warning
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// if none is selected, but there's no good way to #define all inapplicable
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// settings to 0. doing so up front is hard to maintain and would require
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// #undef before setting any one to 1. #ifndef afterwards for each setting
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// is ugly and brittle as well. we therefore use #if/#else/#endif.
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// compiler
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// 0 if not present, or (major*100 + minor). note that more than
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// one *_VERSION may be non-zero due to interoperability (e.g. ICC with MSC).
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// .. VC
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#ifdef _MSC_VER
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# define MSC_VERSION _MSC_VER
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#else
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# define MSC_VERSION 0
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#endif
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// .. ICC (VC-compatible)
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#if defined(__INTEL_COMPILER)
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# define ICC_VERSION __INTEL_COMPILER
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#else
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# define ICC_VERSION 0
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#endif
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// .. LCC (VC-compatible)
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#if defined(__LCC__)
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# define LCC_VERSION __LCC__
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#else
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# define LCC_VERSION 0
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#endif
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// .. GCC
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#ifdef __GNUC__
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# define GCC_VERSION (__GNUC__*100 + __GNUC_MINOR__)
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#else
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# define GCC_VERSION 0
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#endif
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// STL
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// (checked by STL implementation-specific code in debug_stl).
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// .. Dinkumware
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#if MSC_VERSION
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# include <yvals.h> // defines _CPPLIB_VER
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#endif
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#if defined(_CPPLIB_VER)
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# define STL_DINKUMWARE _CPPLIB_VER
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#else
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# define STL_DINKUMWARE 0
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#endif
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// .. GCC
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#if defined(__GLIBCPP__)
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# define STL_GCC __GLIBCPP__
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#elif defined(__GLIBCXX__)
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# define STL_GCC __GLIBCXX__
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#else
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# define STL_GCC 0
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#endif
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// .. ICC
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#if defined(__INTEL_CXXLIB_ICC)
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# define STL_ICC __INTEL_CXXLIB_ICC
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#else
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# define STL_ICC 0
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#endif
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// OS
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// .. Windows
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#if defined(_WIN64)
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# define OS_WIN64 1
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#else
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# define OS_WIN64 0
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#endif
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#if defined(_WIN32)
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# define OS_WIN 1
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#else
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# define OS_WIN 0
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#endif
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// .. Linux
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#if defined(linux) || defined(__linux) || defined(__linux__)
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# define OS_LINUX 1
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#else
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# define OS_LINUX 0
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#endif
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// .. Mac OS X
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#if (defined(__APPLE__) && defined(__MACH__))
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# define OS_MACOSX 1
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#else
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# define OS_MACOSX 0
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#endif
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// .. BSD
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#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
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# define OS_BSD 1
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#else
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# define OS_BSD 0
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#endif
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// .. Solaris
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#if defined(sun) || defined(__sun)
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# define OS_SOLARIS 1
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#else
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# define OS_SOLARIS 0
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#endif
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// .. BeOS
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#if defined(__BEOS__)
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# define OS_BEOS 1
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#else
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# define OS_BEOS 0
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#endif
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// .. Mac OS 9 or below
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#if defined(macintosh)
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# define OS_MAC 1
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#else
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# define OS_MAC 0
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#endif
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// .. Amiga
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#if defined(AMIGA)
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# define OS_AMIGA 1
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#else
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# define OS_AMIGA 0
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#endif
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// .. Unix-based
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#if defined(unix) || defined(__unix) || defined(__unix__) || defined(_XOPEN_SOURCE) || defined(_POSIX_SOURCE)
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# define OS_UNIX 1
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#else
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# define OS_UNIX 0
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#endif
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// convenience: additionally set OS_UNIX for Unix-based OSes
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// note: doing this in an separate section instead of adding the extra define
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// to all affected OSes saves a few undefs or macro redefinition warnings.
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#if OS_LINUX || OS_MACOSX || OS_BSD || OS_SOLARIS
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# undef OS_UNIX
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# define OS_UNIX 1
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#endif
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// convenience: additionally set OS_BSD for BSD-based OSes. see note above.
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#if OS_MACOSX
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# undef OS_BSD
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# define OS_BSD 1
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#endif
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// CPU
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// .. IA-32
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#if defined(_M_IX86) || defined(i386) || defined(_X86_)
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# define CPU_IA32 1
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#else
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# define CPU_IA32 0
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#endif
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// .. IA-64
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#if defined(_M_IA64) || defined(__ia64__)
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# define CPU_IA64 1
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#else
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# define CPU_IA64 0
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#endif
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// .. AMD64
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#if defined(_M_AMD64) || defined(__amd64__) || defined(__amd64)
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# define CPU_AMD64 1
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#else
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# define CPU_AMD64 0
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#endif
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// .. Alpha
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#if defined(_M_ALPHA) || defined(__alpha__) || defined(__alpha)
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# define CPU_ALPHA 1
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#else
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# define CPU_ALPHA 0
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#endif
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// .. ARM
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#if defined(__arm__)
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# define CPU_ARM 1
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#else
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# define CPU_ARM 0
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#endif
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// .. MIPS
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#if defined(__MIPS__) || defined(__mips__) || defined(__mips)
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# define CPU_MIPS 1
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#else
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# define CPU_MIPS 0
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#endif
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// byte order
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// if already defined by someone else, assume they are also correct :P
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#ifndef BYTE_ORDER
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# define LITTLE_ENDIAN 0x4321
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# define BIG_ENDIAN 0x1234
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# if CPU_IA32 || CPU_IA64 || CPU_AMD64 || CPU_ALPHA || CPU_ARM || CPU_MIPS || defined(__LITTLE_ENDIAN__)
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# define BYTE_ORDER LITTLE_ENDIAN
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# else
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# define BYTE_ORDER BIG_ENDIAN
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# endif
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#endif
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//-----------------------------------------------------------------------------
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// auto-detect platform features, given the above information
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//-----------------------------------------------------------------------------
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// check if compiling in pure C mode (not C++) with support for C99.
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// (this is more convenient than testing __STDC_VERSION__ directly)
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//
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// note: C99 provides several useful but disjunct bits of functionality.
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// unfortunately, most C++ compilers do not offer a complete implementation.
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// however, many of these features are likely to be added to C++, and/or are
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// already available as extensions. what we'll do is add a HAVE_ macro for
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// each feature and test those instead. they are set if HAVE_C99, or also if
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// the compiler happens to support something compatible.
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//
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// rationale: lying about __STDC_VERSION__ via Premake so as to enable support
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// for some C99 functions doesn't work. Mac OS X headers would then use the
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// restrict keyword, which is never supported by g++ (because that might
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// end up breaking valid C++98 programs).
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#define HAVE_C99 0
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#ifdef __STDC_VERSION__
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# if __STDC_VERSION__ >= 199901L
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# undef HAVE_C99
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# define HAVE_C99 1
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# endif
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#endif
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// strdup, wcsdup
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#if OS_MACOSX
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# define HAVE_STRDUP 1
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# define HAVE_WCSDUP 0
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#else
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# define HAVE_STRDUP 1
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# define HAVE_WCSDUP 1
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#endif
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// emulation needed on VC8 because this function is "deprecated".
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// not present on VC7, either.
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#if MSC_VERSION
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# define HAVE_MKDIR 0
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#else
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# define HAVE_MKDIR 1
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#endif
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// rint*, fminf, fpclassify (too few/diverse to make separate HAVE_ for each)
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#if HAVE_C99 || GCC_VERSION
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# define HAVE_C99_MATH 1
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#else
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# define HAVE_C99_MATH 0
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#endif
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// gettimeofday()
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#if OS_UNIX
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# define HAVE_GETTIMEOFDAY 1
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#else
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# define HAVE_GETTIMEOFDAY 0
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#endif
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// clock_gettime()
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#define HAVE_CLOCK_GETTIME 0
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#if OS_UNIX
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# include <unistd.h>
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# if defined(_POSIX_TIMERS) && _POSIX_TIMERS > 0
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# undef HAVE_CLOCK_GETTIME
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# define HAVE_CLOCK_GETTIME 1
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# endif
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#endif
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// X server
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#if OS_LINUX
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# define HAVE_X 1
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#else
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# define HAVE_X 0
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#endif
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// MSVC/ICC-style __asm{} blocks (Intel syntax)
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#if MSC_VERSION
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# define HAVE_MS_ASM 1
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#else
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# define HAVE_MS_ASM 0
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#endif
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// GNU-style __asm() blocks (AT&T syntax)
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#if GCC_VERSION
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# define HAVE_GNU_ASM 1
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#else
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# define HAVE_GNU_ASM 0
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#endif
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// precompiled headers (affects what precompiled.h pulls in; see there)
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#if MSC_VERSION
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# define HAVE_PCH 1
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#elif defined(USING_PCH)
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# define HAVE_PCH 1
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#else
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# define HAVE_PCH 0
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#endif
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// VC debug memory allocator / leak detector
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// notes:
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// - PCH is required because it makes sure system headers are included
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// before redefining new (otherwise, tons of errors result);
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// - disabled on ICC9 because the ICC 9.0.006 beta appears to generate
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// incorrect code when we redefine new.
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// TODO: remove when no longer necessary
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#if MSC_VERSION && \
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(!defined(NDEBUG) || defined(TESTING)) && \
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HAVE_PCH && \
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ICC_VERSION != 900
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# define HAVE_VC_DEBUG_ALLOC 1
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#else
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# define HAVE_VC_DEBUG_ALLOC 0
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#endif
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// nonstandard STL containers
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#define HAVE_STL_SLIST 0
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#if STL_DINKUMWARE
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# define HAVE_STL_HASH 1
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#else
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# define HAVE_STL_HASH 0
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#endif
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// safe CRT functions: strcpy_s, fopen_s, etc.
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// these are always available to users: if not provided by the CRT, we
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// implement them ourselves. this flag is only used to skip our impl.
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#if MSC_VERSION >= 1400
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# define HAVE_SECURE_CRT 1
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#else
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# define HAVE_SECURE_CRT 0
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#endif
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// should we use our float->int code? newer GCC versions with -ffast-math and
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// VC8 can use SSE, so skip it there.
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#if CPU_IA32 && MSC_VERSION && MSC_VERSION < 1400
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# define USE_IA32_FLOAT_TO_INT 1
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#else
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# define USE_IA32_FLOAT_TO_INT 0
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#endif
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#endif // #ifndef INCLUDED_CONFIG
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