367b8112fe
Move all header files for xtensa to arch/xtensa/include and platform and variant header files to the appropriate arch/xtensa/platforms/ and arch/xtensa/variants/ directories. Moving the files gets also rid of all uses of symlinks in the Makefile. This has been completed already for the majority of the architectures and xtensa is one out of six missing. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Chris Zankel <chris@zankel.net>
125 lines
2.7 KiB
C
125 lines
2.7 KiB
C
/*
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* include/asm-xtensa/string.h
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*
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* These trivial string functions are considered part of the public domain.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2001 - 2005 Tensilica Inc.
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*/
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/* We should optimize these. See arch/xtensa/lib/strncpy_user.S */
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#ifndef _XTENSA_STRING_H
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#define _XTENSA_STRING_H
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#define __HAVE_ARCH_STRCPY
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static inline char *strcpy(char *__dest, const char *__src)
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{
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register char *__xdest = __dest;
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unsigned long __dummy;
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__asm__ __volatile__("1:\n\t"
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"l8ui %2, %1, 0\n\t"
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"s8i %2, %0, 0\n\t"
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"addi %1, %1, 1\n\t"
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"addi %0, %0, 1\n\t"
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"bnez %2, 1b\n\t"
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: "=r" (__dest), "=r" (__src), "=&r" (__dummy)
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: "0" (__dest), "1" (__src)
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: "memory");
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return __xdest;
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}
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#define __HAVE_ARCH_STRNCPY
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static inline char *strncpy(char *__dest, const char *__src, size_t __n)
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{
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register char *__xdest = __dest;
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unsigned long __dummy;
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if (__n == 0)
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return __xdest;
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__asm__ __volatile__(
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"1:\n\t"
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"l8ui %2, %1, 0\n\t"
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"s8i %2, %0, 0\n\t"
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"addi %1, %1, 1\n\t"
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"addi %0, %0, 1\n\t"
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"beqz %2, 2f\n\t"
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"bne %1, %5, 1b\n"
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"2:"
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: "=r" (__dest), "=r" (__src), "=&r" (__dummy)
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: "0" (__dest), "1" (__src), "r" (__src+__n)
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: "memory");
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return __xdest;
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}
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#define __HAVE_ARCH_STRCMP
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static inline int strcmp(const char *__cs, const char *__ct)
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{
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register int __res;
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unsigned long __dummy;
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__asm__ __volatile__(
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"1:\n\t"
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"l8ui %3, %1, 0\n\t"
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"addi %1, %1, 1\n\t"
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"l8ui %2, %0, 0\n\t"
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"addi %0, %0, 1\n\t"
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"beqz %2, 2f\n\t"
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"beq %2, %3, 1b\n"
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"2:\n\t"
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"sub %2, %3, %2"
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: "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy)
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: "0" (__cs), "1" (__ct));
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return __res;
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}
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#define __HAVE_ARCH_STRNCMP
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static inline int strncmp(const char *__cs, const char *__ct, size_t __n)
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{
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register int __res;
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unsigned long __dummy;
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__asm__ __volatile__(
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"mov %2, %3\n"
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"1:\n\t"
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"beq %0, %6, 2f\n\t"
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"l8ui %3, %1, 0\n\t"
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"addi %1, %1, 1\n\t"
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"l8ui %2, %0, 0\n\t"
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"addi %0, %0, 1\n\t"
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"beqz %2, 2f\n\t"
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"beqz %3, 2f\n\t"
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"beq %2, %3, 1b\n"
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"2:\n\t"
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"sub %2, %3, %2"
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: "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy)
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: "0" (__cs), "1" (__ct), "r" (__cs+__n));
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return __res;
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}
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#define __HAVE_ARCH_MEMSET
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extern void *memset(void *__s, int __c, size_t __count);
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#define __HAVE_ARCH_MEMCPY
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extern void *memcpy(void *__to, __const__ void *__from, size_t __n);
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#define __HAVE_ARCH_MEMMOVE
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extern void *memmove(void *__dest, __const__ void *__src, size_t __n);
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/* Don't build bcopy at all ... */
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#define __HAVE_ARCH_BCOPY
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#define __HAVE_ARCH_MEMSCAN
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#define memscan memchr
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#endif /* _XTENSA_STRING_H */
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