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https://github.com/jart/cosmopolitan.git
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112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
#ifndef COSMOPOLITAN_LIBC_DCE_H_
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#define COSMOPOLITAN_LIBC_DCE_H_
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#include "libc/nexgen32e/kcpuids.h"
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/*─────────────────────────────────────────────────────────────────────────────╗
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│ cosmopolitan § autotune » dead code elimination │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#ifndef SUPPORT_VECTOR
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/**
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* Supported Platforms Tuning Knob (Runtime & Compile-Time)
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* Tuning this bitmask will remove platform polyfills at compile-time.
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*/
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#define SUPPORT_VECTOR 255
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#endif
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#define LINUX 1
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#define METAL 2
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#define WINDOWS 4
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#define XNU 8
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#define OPENBSD 16
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#define FREEBSD 32
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#define NETBSD 64
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#ifdef NDEBUG
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#define NoDebug() 1
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#else
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#define NoDebug() 0
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#endif
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#ifdef MODE_DBG
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#define IsModeDbg() 1
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#else
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#define IsModeDbg() 0
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#endif
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#ifdef __MFENTRY__
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#define HaveFentry() 1
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#else
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#define HaveFentry() 0
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#endif
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#ifdef TRUSTWORTHY
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#define IsTrustworthy() 1
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#else
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#define IsTrustworthy() 0
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#endif
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#ifdef SECURITY_BLANKETS
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#define UseSecurityBlankets() 1
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#else
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#define UseSecurityBlankets() 0
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#endif
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#ifdef TINY
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#define IsTiny() 1
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#else
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#define IsTiny() 0
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#endif
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#ifdef __OPTIMIZE__
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#define IsOptimized() 1
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#else
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#define IsOptimized() 0
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#endif
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#if defined(__PIE__) || defined(__PIC__)
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#define IsPositionIndependent() 1
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#else
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#define IsPositionIndependent() 0
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#endif
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#define SupportsLinux() ((SUPPORT_VECTOR & LINUX) == LINUX)
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#define SupportsMetal() ((SUPPORT_VECTOR & METAL) == METAL)
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#define SupportsWindows() ((SUPPORT_VECTOR & WINDOWS) == WINDOWS)
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#define SupportsXnu() ((SUPPORT_VECTOR & XNU) == XNU)
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#define SupportsFreebsd() ((SUPPORT_VECTOR & FREEBSD) == FREEBSD)
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#define SupportsOpenbsd() ((SUPPORT_VECTOR & OPENBSD) == OPENBSD)
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#define SupportsNetbsd() ((SUPPORT_VECTOR & NETBSD) == NETBSD)
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#define SupportsBsd() (!!(SUPPORT_VECTOR & (XNU | FREEBSD | OPENBSD | NETBSD)))
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#define SupportsSystemv() \
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(!!(SUPPORT_VECTOR & (LINUX | XNU | OPENBSD | FREEBSD | NETBSD)))
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#ifndef __ASSEMBLER__
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#define IsLinux() (SupportsLinux() && (__hostos & LINUX))
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#define IsMetal() (SupportsMetal() && (__hostos & METAL))
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#define IsWindows() (SupportsWindows() && (__hostos & WINDOWS))
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#define IsXnu() (SupportsXnu() && (__hostos & XNU))
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#define IsFreebsd() (SupportsFreebsd() && (__hostos & FREEBSD))
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#define IsOpenbsd() (SupportsOpenbsd() && (__hostos & OPENBSD))
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#define IsNetbsd() (SupportsNetbsd() && (__hostos & NETBSD))
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#define IsBsd() (IsXnu() || IsFreebsd() || IsOpenbsd() || IsNetbsd())
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#else
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/* clang-format off */
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#define IsLinux() $LINUX,__hostos(%rip)
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#define IsMetal() $METAL,__hostos(%rip)
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#define IsWindows() $WINDOWS,__hostos(%rip)
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#define IsBsd() $XNU|FREEBSD|OPENBSD|NETBSD,__hostos(%rip)
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#define IsXnu() $XNU,__hostos(%rip)
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#define IsFreebsd() $FREEBSD,__hostos(%rip)
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#define IsOpenbsd() $OPENBSD,__hostos(%rip)
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#define IsNetbsd() $NETBSD,__hostos(%rip)
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/* clang-format on */
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#endif
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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extern const int __hostos;
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_DCE_H_ */
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