Eric Lee / smarc-fsl-linux-kernel

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include/asm-xtensa/string.h 2.7 KB
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9a8fd5589   Chris Zankel   [PATCH] xtensa: A... 
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  /*
   * include/asm-xtensa/string.h
   *
   * These trivial string functions are considered part of the public domain.
   *
   * This file is subject to the terms and conditions of the GNU General Public
   * License.  See the file "COPYING" in the main directory of this archive
   * for more details.
   *
   * Copyright (C) 2001 - 2005 Tensilica Inc.
   */
  
  /* We should optimize these. See arch/xtensa/lib/strncpy_user.S */
  
  #ifndef _XTENSA_STRING_H
  #define _XTENSA_STRING_H
  
  #define __HAVE_ARCH_STRCPY
d99cf715a   Adrian Bunk   [PATCH] xtensa: r... 
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  static inline char *strcpy(char *__dest, const char *__src)
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  {
  	register char *__xdest = __dest;
  	unsigned long __dummy;
  
  	__asm__ __volatile__("1:
  \t"
  		"l8ui	%2, %1, 0
  \t"
  		"s8i	%2, %0, 0
  \t"
  		"addi	%1, %1, 1
  \t"
  		"addi	%0, %0, 1
  \t"
  		"bnez	%2, 1b
  \t"
  		: "=r" (__dest), "=r" (__src), "=&r" (__dummy)
  		: "0" (__dest), "1" (__src)
  		: "memory");
  
  	return __xdest;
  }
  
  #define __HAVE_ARCH_STRNCPY
d99cf715a   Adrian Bunk   [PATCH] xtensa: r... 
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  static inline char *strncpy(char *__dest, const char *__src, size_t __n)
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  {
  	register char *__xdest = __dest;
  	unsigned long __dummy;
  
  	if (__n == 0)
  		return __xdest;
  
  	__asm__ __volatile__(
  		"1:
  \t"
  		"l8ui	%2, %1, 0
  \t"
  		"s8i	%2, %0, 0
  \t"
  		"addi	%1, %1, 1
  \t"
  		"addi	%0, %0, 1
  \t"
  		"beqz	%2, 2f
  \t"
  		"bne	%1, %5, 1b
  "
  		"2:"
  		: "=r" (__dest), "=r" (__src), "=&r" (__dummy)
  		: "0" (__dest), "1" (__src), "r" (__src+__n)
  		: "memory");
  
  	return __xdest;
  }
  
  #define __HAVE_ARCH_STRCMP
d99cf715a   Adrian Bunk   [PATCH] xtensa: r... 
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  static inline int strcmp(const char *__cs, const char *__ct)
9a8fd5589   Chris Zankel   [PATCH] xtensa: A... 
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  {
  	register int __res;
  	unsigned long __dummy;
  
  	__asm__ __volatile__(
  		"1:
  \t"
  		"l8ui	%3, %1, 0
  \t"
  		"addi	%1, %1, 1
  \t"
  		"l8ui	%2, %0, 0
  \t"
  		"addi	%0, %0, 1
  \t"
  		"beqz	%2, 2f
  \t"
  		"beq	%2, %3, 1b
  "
  		"2:
  \t"
  		"sub	%2, %3, %2"
  		: "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy)
  		: "0" (__cs), "1" (__ct));
  
  	return __res;
  }
  
  #define __HAVE_ARCH_STRNCMP
d99cf715a   Adrian Bunk   [PATCH] xtensa: r... 
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  static inline int strncmp(const char *__cs, const char *__ct, size_t __n)
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  {
  	register int __res;
  	unsigned long __dummy;
  
  	__asm__ __volatile__(
  		"mov	%2, %3
  "
  		"1:
  \t"
  		"beq	%0, %6, 2f
  \t"
  		"l8ui	%3, %1, 0
  \t"
  		"addi	%1, %1, 1
  \t"
  		"l8ui	%2, %0, 0
  \t"
  		"addi	%0, %0, 1
  \t"
  		"beqz	%2, 2f
  \t"
  		"beqz	%3, 2f
  \t"
  		"beq	%2, %3, 1b
  "
  		"2:
  \t"
  		"sub	%2, %3, %2"
  		: "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy)
  		: "0" (__cs), "1" (__ct), "r" (__cs+__n));
  
  	return __res;
  }
  
  #define __HAVE_ARCH_MEMSET
  extern void *memset(void *__s, int __c, size_t __count);
  
  #define __HAVE_ARCH_MEMCPY
  extern void *memcpy(void *__to, __const__ void *__from, size_t __n);
  
  #define __HAVE_ARCH_MEMMOVE
  extern void *memmove(void *__dest, __const__ void *__src, size_t __n);
  
  /* Don't build bcopy at all ...  */
  #define __HAVE_ARCH_BCOPY
  
  #define __HAVE_ARCH_MEMSCAN
  #define memscan memchr
  
  #endif	/* _XTENSA_STRING_H */