fb4cac573e
Try to treat memcmp() in same way as memcpy() and memset(). Provide a declaration in boot/string.h and by default user gets a memcmp() which maps to builtin function. Move optimized definition of memcmp() in boot/string.c. Now a user can do #undef memcmp and link against string.c to use optimzied memcmp(). It also simplifies boot/compressed/string.c where we had to redefine memcmp(). That extra definition is gone now. Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Link: http://lkml.kernel.org/r/1395170800-11059-5-git-send-email-vgoyal@redhat.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
21 lines
600 B
C
21 lines
600 B
C
#ifndef BOOT_STRING_H
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#define BOOT_STRING_H
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/* Undef any of these macros coming from string_32.h. */
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#undef memcpy
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#undef memset
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#undef memcmp
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void *memcpy(void *dst, const void *src, size_t len);
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void *memset(void *dst, int c, size_t len);
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int memcmp(const void *s1, const void *s2, size_t len);
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/*
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* Access builtin version by default. If one needs to use optimized version,
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* do "undef memcpy" in .c file and link against right string.c
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*/
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#define memcpy(d,s,l) __builtin_memcpy(d,s,l)
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#define memset(d,c,l) __builtin_memset(d,c,l)
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#define memcmp __builtin_memcmp
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#endif /* BOOT_STRING_H */
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