Commit bafe6803 authored by Haavard Skinnemoen's avatar Haavard Skinnemoen

avr32: Work around byteswap bug in gcc < 4.2

gcc versions earlier than 4.2 sign-extends the result of le16_to_cpu()
and friends when we implement __arch__swabX() using
__builtin_bswap_X(). Disable our arch-specific optimizations when those
gcc versions are being used.
Signed-off-by: default avatarHaavard Skinnemoen <hskinnemoen@atmel.com>
parent d395991c
...@@ -12,8 +12,14 @@ extern unsigned long __builtin_bswap_32(unsigned long x); ...@@ -12,8 +12,14 @@ extern unsigned long __builtin_bswap_32(unsigned long x);
extern unsigned short __builtin_bswap_16(unsigned short x); extern unsigned short __builtin_bswap_16(unsigned short x);
#endif #endif
/*
* avr32-linux-gcc versions earlier than 4.2 improperly sign-extends
* the result.
*/
#if !(__GNUC__ == 4 && __GNUC_MINOR__ < 2)
#define __arch__swab32(x) __builtin_bswap_32(x) #define __arch__swab32(x) __builtin_bswap_32(x)
#define __arch__swab16(x) __builtin_bswap_16(x) #define __arch__swab16(x) __builtin_bswap_16(x)
#endif
#if !defined(__STRICT_ANSI__) || defined(__KERNEL__) #if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
# define __BYTEORDER_HAS_U64__ # define __BYTEORDER_HAS_U64__
......
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