From e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb Mon Sep 17 00:00:00 2001 From: Yang Zhang Date: Fri, 28 Aug 2015 09:58:54 +0800 Subject: Add qemu 2.4.0 Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang --- .../ipxe/src/arch/i386/include/bits/byteswap.h | 70 ++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 qemu/roms/ipxe/src/arch/i386/include/bits/byteswap.h (limited to 'qemu/roms/ipxe/src/arch/i386/include/bits/byteswap.h') diff --git a/qemu/roms/ipxe/src/arch/i386/include/bits/byteswap.h b/qemu/roms/ipxe/src/arch/i386/include/bits/byteswap.h new file mode 100644 index 000000000..0d9cb967c --- /dev/null +++ b/qemu/roms/ipxe/src/arch/i386/include/bits/byteswap.h @@ -0,0 +1,70 @@ +#ifndef _BITS_BYTESWAP_H +#define _BITS_BYTESWAP_H + +/** @file + * + * Byte-order swapping functions + * + */ + +#include + +FILE_LICENCE ( GPL2_OR_LATER ); + +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 )) void +__bswap_16s ( uint16_t *x ) { + __asm__ ( "rorw $8, %0" : "+m" ( *x ) ); +} + +static inline __attribute__ (( always_inline, const )) uint32_t +__bswap_variable_32 ( uint32_t x ) { + __asm__ ( "bswapl %0" : "=r" ( x ) : "0" ( x ) ); + return x; +} + +static inline __attribute__ (( always_inline )) void +__bswap_32s ( uint32_t *x ) { + __asm__ ( "bswapl %0" : "=r" ( *x ) : "0" ( *x ) ); +} + +static inline __attribute__ (( always_inline, const )) uint64_t +__bswap_variable_64 ( uint64_t x ) { + uint32_t in_high = ( x >> 32 ); + uint32_t in_low = ( x & 0xffffffffUL ); + uint32_t out_high; + uint32_t out_low; + + __asm__ ( "bswapl %0\n\t" + "bswapl %1\n\t" + "xchgl %0,%1\n\t" + : "=r" ( out_high ), "=r" ( out_low ) + : "0" ( in_high ), "1" ( in_low ) ); + + return ( ( ( ( uint64_t ) out_high ) << 32 ) | + ( ( uint64_t ) out_low ) ); +} + +static inline __attribute__ (( always_inline )) void +__bswap_64s ( uint64_t *x ) { + struct { + uint32_t __attribute__ (( may_alias )) low; + uint32_t __attribute__ (( may_alias )) high; + } __attribute__ (( may_alias )) *dwords = ( ( void * ) x ); + uint32_t discard; + + __asm__ ( "movl %0,%2\n\t" + "bswapl %2\n\t" + "xchgl %2,%1\n\t" + "bswapl %2\n\t" + "movl %2,%0\n\t" + : "+m" ( dwords->low ), "+m" ( dwords->high ), + "=r" ( discard ) ); +} + +#endif /* _BITS_BYTESWAP_H */ -- cgit 1.2.3-korg