diff options
| author | Michael Brown | 2008-11-18 23:30:37 +0100 |
|---|---|---|
| committer | Michael Brown | 2008-12-05 01:06:27 +0100 |
| commit | ce0a0ccf5c2b99be684f13a9418d1556bae5f0ed (patch) | |
| tree | 965c86dafc3fbdca8e46ee22b94387242cc0e288 /src/arch/x86_64/include/bits/byteswap.h | |
| parent | [hermon] Fix permissions broken in 3a799e9 ("Add PCI ID for ConnectX QDR card") (diff) | |
| download | ipxe-ce0a0ccf5c2b99be684f13a9418d1556bae5f0ed.tar.gz ipxe-ce0a0ccf5c2b99be684f13a9418d1556bae5f0ed.tar.xz ipxe-ce0a0ccf5c2b99be684f13a9418d1556bae5f0ed.zip | |
[x86_64] Add support for compilation as an x86_64 binary
Currently the only supported platform for x86_64 is EFI.
Building an EFI64 gPXE requires a version of gcc that supports
__attribute__((ms_abi)). This currently means a development build of
gcc; the feature should be present when gcc 4.4 is released.
In the meantime; you can grab a suitable gcc tree from
git://git.etherboot.org/scm/people/mcb30/gcc/.git
Diffstat (limited to 'src/arch/x86_64/include/bits/byteswap.h')
| -rw-r--r-- | src/arch/x86_64/include/bits/byteswap.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/arch/x86_64/include/bits/byteswap.h b/src/arch/x86_64/include/bits/byteswap.h new file mode 100644 index 000000000..9ed85e8f8 --- /dev/null +++ b/src/arch/x86_64/include/bits/byteswap.h @@ -0,0 +1,22 @@ +#ifndef _BITS_BYTESWAP_H +#define _BITS_BYTESWAP_H + +static inline __attribute__ (( always_inline, const )) uint16_t +__bswap_variable_16 ( uint16_t x ) { + __asm__ ( "xchgb %b0,%h0" : "=Q" ( x ) : "0" ( x ) ); + return x; +} + +static inline __attribute__ (( always_inline, const )) uint32_t +__bswap_variable_32 ( uint32_t x ) { + __asm__ ( "bswapl %k0" : "=r" ( x ) : "0" ( x ) ); + return x; +} + +static inline __attribute__ (( always_inline, const )) uint64_t +__bswap_variable_64 ( uint64_t x ) { + __asm__ ( "bswapq %q0" : "=r" ( x ) : "0" ( x ) ); + return x; +} + +#endif /* _BITS_BYTESWAP_H */ |