在編譯時確定 CPU 架構
識別 CPU 架構對於程式碼最佳化和特定於硬體的操作至關重要。然而,不同的編譯器為此目的使用不同的預處理器定義,例如 MSVS 的“_M_X86”和 GCC 的“__i386__”。
是否有架構偵測的標準方法?
遺憾的是,在編譯過程中並沒有確定CPU架構的標準方法。編譯器實作自己的方法來表示此資訊。
架構定義的綜合列表
雖然不存在標準化的定義列表,但有多種資源可用於幫助識別與特定編譯器相關的定義:
架構偵測的綜合程式碼範例
以下程式碼片段提供了一種在編譯期間確定CPU 架構的綜合方法,涵蓋了各種架構:
extern "C" { const char *getBuild() { //Get current architecture, detectx nearly every architecture. Coded by Freak #if defined(__x86_64__) || defined(_M_X64) return "x86_64"; #elif defined(i386) || defined(__i386__) || defined(__i386) || defined(_M_IX86) return "x86_32"; #elif defined(__ARM_ARCH_2__) return "ARM2"; #elif defined(__ARM_ARCH_3__) || defined(__ARM_ARCH_3M__) return "ARM3"; #elif defined(__ARM_ARCH_4T__) || defined(__TARGET_ARM_4T) return "ARM4T"; #elif defined(__ARM_ARCH_5_) || defined(__ARM_ARCH_5E_) return "ARM5" #elif defined(__ARM_ARCH_6T2_) || defined(__ARM_ARCH_6T2_) return "ARM6T2"; #elif defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) return "ARM6"; #elif defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7S__) return "ARM7"; #elif defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7S__) return "ARM7A"; #elif defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7S__) return "ARM7R"; #elif defined(__ARM_ARCH_7M__) return "ARM7M"; #elif defined(__ARM_ARCH_7S__) return "ARM7S"; #elif defined(__aarch64__) || defined(_M_ARM64) return "ARM64"; #elif defined(mips) || defined(__mips__) || defined(__mips) return "MIPS"; #elif defined(__sh__) return "SUPERH"; #elif defined(__powerpc) || defined(__powerpc__) || defined(__powerpc64__) || defined(__POWERPC__) || defined(__ppc__) || defined(__PPC__) || defined(_ARCH_PPC) return "POWERPC"; #elif defined(__PPC64__) || defined(__ppc64__) || defined(_ARCH_PPC64) return "POWERPC64"; #elif defined(__sparc__) || defined(__sparc) return "SPARC"; #elif defined(__m68k__) return "M68K"; #else return "UNKNOWN"; #endif } }
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