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