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/*
$Id: bytesex_asm.h,v 1.3 2008/03/25 15:59:08 karl Exp $
Copyright (C) 2008 Rocky Bernstein <rocky@gnu.org>
2001, 2004, 2005 Herbert Valerio Riedel <hvr@gnu.org>
2001 Sven Ottemann <ac-logic@freenet.de>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file bytesex_asm.h
* \brief Assembly code to handle byte-swapping.
Note: this header will is slated to get removed and libcdio will use
glib.h routines instead.
*/
#ifndef __CDIO_BYTESEX_ASM_H__
#define __CDIO_BYTESEX_ASM_H__
#if !defined(DISABLE_ASM_OPTIMIZE)
#include <cdio/types.h>
#if defined(__powerpc__) && defined(__GNUC__)
inline static
uint32_t uint32_swap_le_be_asm(const uint32_t a)
{
uint32_t b;
__asm__ ("lwbrx %0,0,%1"
:"=r"(b)
:"r"(&a), "m"(a));
return b;
}
inline static
uint16_t uint16_swap_le_be_asm(const uint16_t a)
{
uint32_t b;
__asm__ ("lhbrx %0,0,%1"
:"=r"(b)
:"r"(&a), "m"(a));
return b;
}
#define UINT16_SWAP_LE_BE uint16_swap_le_be_asm
#define UINT32_SWAP_LE_BE uint32_swap_le_be_asm
#elif defined(__mc68000__) && defined(__STORMGCC__)
inline static
uint32_t uint32_swap_le_be_asm(uint32_t a __asm__("d0"))
{
/* __asm__("rolw #8,%0; swap %0; rolw #8,%0" : "=d" (val) : "0" (val)); */
__asm__("move.l %1,d0;rol.w #8,d0;swap d0;rol.w #8,d0;move.l d0,%0"
:"=r"(a)
:"r"(a));
return(a);
}
inline static
uint16_t uint16_swap_le_be_asm(uint16_t a __asm__("d0"))
{
__asm__("move.l %1,d0;rol.w #8,d0;move.l d0,%0"
:"=r"(a)
:"r"(a));
return(a);
}
#define UINT16_SWAP_LE_BE uint16_swap_le_be_asm
#define UINT32_SWAP_LE_BE uint32_swap_le_be_asm
#elif 0 && defined(__i386__) && defined(__GNUC__)
inline static
uint32_t uint32_swap_le_be_asm(uint32_t a)
{
__asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */
"rorl $16,%0\n\t" /* swap words */
"xchgb %b0,%h0" /* swap higher bytes */
:"=q" (a)
: "0" (a));
return(a);
}
inline static
uint16_t uint16_swap_le_be_asm(uint16_t a)
{
__asm__("xchgb %b0,%h0" /* swap bytes */
: "=q" (a)
: "0" (a));
return(a);
}
#define UINT16_SWAP_LE_BE uint16_swap_le_be_asm
#define UINT32_SWAP_LE_BE uint32_swap_le_be_asm
#endif
#endif /* !defined(DISABLE_ASM_OPTIMIZE) */
#endif /* __CDIO_BYTESEX_ASM_H__ */
/*
* Local variables:
* c-file-style: "gnu"
* tab-width: 8
* indent-tabs-mode: nil
* End:
*/
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