forked from pool/erofs-utils
43 lines
1.4 KiB
Diff
43 lines
1.4 KiB
Diff
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From: Jan Engelhardt <jengelh@inai.de>
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Date: 2018-11-19 22:07:39.047450605 +0100
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---
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erofs_types.h | 25 ++++++++++++++++++-------
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1 file changed, 18 insertions(+), 7 deletions(-)
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Index: erofs-utils-0.0.1~4/erofs_types.h
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===================================================================
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--- erofs-utils-0.0.1~4.orig/erofs_types.h
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+++ erofs-utils-0.0.1~4/erofs_types.h
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@@ -26,13 +26,24 @@
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#define s32 int32_t
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#define s64 int64_t
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-#define cpu_to_le16(X) htole16(X)
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-#define cpu_to_le32(X) htole32(X)
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-#define cpu_to_le64(X) htole64(X)
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-
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-#define le16_to_cpu(X) le16toh(X)
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-#define le32_to_cpu(X) le32toh(X)
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-#define le64_to_cpu(X) le64toh(X)
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+#if (defined(__BYTE_ORDER) && __BYTE_ORDER == __BIG_ENDIAN) || \
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+ (defined(_BYTE_ORDER) && _BYTE_ORDER == _BIG_ENDIAN)
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+ /* We need to use constexpr functions, and htole16 unfortunately is not. */
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+# define cpu_to_le16(x) __builtin_bswap16(x)
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+# define cpu_to_le32(x) __builtin_bswap32(x)
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+# define cpu_to_be64(x) (x)
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+# define le16_to_cpu(x) __builtin_bswap16(x)
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+# define le32_to_cpu(x) __builtin_bswap32(x)
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+# define be64_to_cpu(x) (x)
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+#else
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+# define cpu_to_le16(x) (x)
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+# define cpu_to_le32(x) (x)
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+# define cpu_to_le64(x) (x)
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+# define cpu_to_be64(x) __builtin_bswap64(x)
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+# define le16_to_cpu(x) (x)
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+# define le32_to_cpu(x) (x)
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+# define be64_to_cpu(x) __builtin_bswap64(x)
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+#endif
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#ifndef __OPTIMIZE__
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#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
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