forked from Imagelibrary/rtems
57 lines
1.3 KiB
C
57 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+-with-RTEMS-exception */
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/*
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* byteorder.h
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*
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* This file contains inline implementation of function to
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* deal with endian conversion.
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*
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* It is a stripped down version of linux ppc file...
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*
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* Copyright (C) 1999 Eric Valette (eric.valette@free.fr)
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* Canon Centre Recherche France.
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#ifndef _LIBCPU_BYTEORDER_H
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#define _LIBCPU_BYTEORDER_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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static inline unsigned ld_le16(volatile uint16_t *addr)
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{
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unsigned val;
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__asm__ volatile ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
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return val;
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}
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static inline void st_le16(volatile uint16_t *addr, unsigned val)
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{
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__asm__ volatile ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
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}
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static inline unsigned ld_le32(volatile uint32_t *addr)
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{
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unsigned val;
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__asm__ volatile ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
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return val;
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}
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static inline void st_le32(volatile uint32_t *addr, unsigned val)
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{
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__asm__ volatile ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* _LIBCPU_BYTEORDER_H */
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