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32 results

swab.h

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  • swab.h 1.89 KiB
    /*
     * 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
     * 2 of the License, or (at your option) any later version.
     */
    #ifndef _ASM_POWERPC_SWAB_H
    #define _ASM_POWERPC_SWAB_H
    
    #include <uapi/asm/swab.h>
    
    #ifdef __GNUC__
    #ifndef __powerpc64__
    #endif /* __powerpc64__ */
    
    static __inline__ __u16 ld_le16(const volatile __u16 *addr)
    {
    	__u16 val;
    
    	__asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
    	return val;
    }
    #define __arch_swab16p ld_le16
    
    static __inline__ void st_le16(volatile __u16 *addr, const __u16 val)
    {
    	__asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
    }
    
    static inline void __arch_swab16s(__u16 *addr)
    {
    	st_le16(addr, *addr);
    }
    #define __arch_swab16s __arch_swab16s
    
    static __inline__ __u32 ld_le32(const volatile __u32 *addr)
    {
    	__u32 val;
    
    	__asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
    	return val;
    }
    #define __arch_swab32p ld_le32
    
    static __inline__ void st_le32(volatile __u32 *addr, const __u32 val)
    {
    	__asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
    }
    
    static inline void __arch_swab32s(__u32 *addr)
    {
    	st_le32(addr, *addr);
    }
    #define __arch_swab32s __arch_swab32s
    
    static inline __attribute_const__ __u16 __arch_swab16(__u16 value)
    {
    	__u16 result;
    
    	__asm__("rlwimi %0,%1,8,16,23"
    	    : "=r" (result)
    	    : "r" (value), "0" (value >> 8));
    	return result;
    }
    #define __arch_swab16 __arch_swab16
    
    static inline __attribute_const__ __u32 __arch_swab32(__u32 value)
    {
    	__u32 result;
    
    	__asm__("rlwimi %0,%1,24,16,23\n\t"
    	    "rlwimi %0,%1,8,8,15\n\t"
    	    "rlwimi %0,%1,24,0,7"
    	    : "=r" (result)
    	    : "r" (value), "0" (value >> 24));
    	return result;
    }
    #define __arch_swab32 __arch_swab32
    
    #endif /* __GNUC__ */
    #endif /* _ASM_POWERPC_SWAB_H */