2aa62f2bc9
This set of three packages: AppPkg, StdLib, StdLibPrivateInternalFiles; contains the implementation of libraries based upon non-UEFI standards such as ISO/IEC-9899, the library portion of the C Language Standard, POSIX, etc. AppPkg contains applications that make use of the standard libraries defined in the StdLib Package. StdLib contains header (include) files and the implementations of the standard libraries. StdLibPrivateInternalFiles contains files for the exclusive use of the library implementations in StdLib. These files should never be directly referenced from applications or other code. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11600 6f19259b-4bc3-4df7-8a09-765794883524
78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
/* $NetBSD: bswap.h,v 1.12 2006/05/22 16:28:27 drochner Exp $ */
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/* Written by Manuel Bouyer. Public domain */
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#ifndef _SYS_BSWAP_H_
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#define _SYS_BSWAP_H_
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#ifndef _LOCORE
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#include <sys/EfiCdefs.h>
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#include <sys/types.h>
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#include <machine/bswap.h>
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__BEGIN_DECLS
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/* Always declare the functions in case their address is taken (etc) */
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#if !defined(__BSWAP_RENAME)
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uint16_t bswap16(uint16_t) __attribute__((__const__));
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uint32_t bswap32(uint32_t) __attribute__((__const__));
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#else
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uint16_t bswap16(uint16_t) __RENAME(__bswap16) __attribute__((__const__));
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uint32_t bswap32(uint32_t) __RENAME(__bswap32) __attribute__((__const__));
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#endif
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uint64_t bswap64(uint64_t) __attribute__((__const__));
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__END_DECLS
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#if defined(__GNUC__) && defined(__OPTIMIZE__)
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/* machine/byte_swap.h might have defined inline versions */
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#ifndef __BYTE_SWAP_U64_VARIABLE
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#define __BYTE_SWAP_U64_VARIABLE bswap64
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#endif
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#ifndef __BYTE_SWAP_U32_VARIABLE
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#define __BYTE_SWAP_U32_VARIABLE bswap32
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#endif
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#ifndef __BYTE_SWAP_U16_VARIABLE
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#define __BYTE_SWAP_U16_VARIABLE bswap16
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#endif
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#define __byte_swap_u64_constant(x) \
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((uint64_t) \
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((((x) & 0xff00000000000000ull) >> 56) | \
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(((x) & 0x00ff000000000000ull) >> 40) | \
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(((x) & 0x0000ff0000000000ull) >> 24) | \
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(((x) & 0x000000ff00000000ull) >> 8) | \
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(((x) & 0x00000000ff000000ull) << 8) | \
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(((x) & 0x0000000000ff0000ull) << 24) | \
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(((x) & 0x000000000000ff00ull) << 40) | \
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(((x) & 0x00000000000000ffull) << 56)))
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#define __byte_swap_u32_constant(x) \
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((((x) & 0xff000000) >> 24) | \
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(((x) & 0x00ff0000) >> 8) | \
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(((x) & 0x0000ff00) << 8) | \
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(((x) & 0x000000ff) << 24))
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#define __byte_swap_u16_constant(x) \
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((((x) & 0xff00) >> 8) | \
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(((x) & 0x00ff) << 8))
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#define bswap64(x) \
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(__builtin_constant_p((x)) ? \
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__byte_swap_u64_constant(x) : __BYTE_SWAP_U64_VARIABLE(x))
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#define bswap32(x) \
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(__builtin_constant_p((x)) ? \
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__byte_swap_u32_constant(x) : __BYTE_SWAP_U32_VARIABLE(x))
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#define bswap16(x) \
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(__builtin_constant_p((x)) ? \
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__byte_swap_u16_constant(x) : __BYTE_SWAP_U16_VARIABLE(x))
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#endif /* __GNUC__ && __OPTIMIZE__ */
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#endif /* !_LOCORE */
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#endif /* !_SYS_BSWAP_H_ */
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