clarify bswap a bit more for gcc

[<vilimp@volny.cz>]

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Hi,
i recently found musl and i started to play with it, i.e. comparing result
of compilation against glibc. 

i know nearly nothing about programing, but is it possible to upstream this
patch, please? It gets rid of gcc's warnings.

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Yes, please.

Best regards,
PV

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diff --git a/byteswap.h_orig b/byteswap.h
index 00b9df3..928be2b 100644
--- a/byteswap.h_orig
+++ b/byteswap.h
@@ -11,12 +11,12 @@ static __inline uint16_t __bswap_16(uint16_t __x)
 
 static __inline uint32_t __bswap_32(uint32_t __x)
 {
-	return __x>>24 | __x>>8&0xff00 | __x<<8&0xff0000 | __x<<24;
+	return __x>>24 | (__x>>8&0xff00) | (__x<<8&0xff0000) | __x<<24;
 }
 
 static __inline uint64_t __bswap_64(uint64_t __x)
 {
-	return __bswap_32(__x)+0ULL<<32 | __bswap_32(__x>>32);
+	return (__bswap_32(__x)+0ULL)<<32 | __bswap_32(__x>>32);
 }
 
 #define bswap_16(x) __bswap_16(x)
diff --git a/endian.h_orig b/endian.h
index 1bd4445..88c3347 100644
--- a/endian.h_orig
+++ b/endian.h
@@ -29,12 +29,12 @@ static __inline uint16_t __bswap16(uint16_t __x)
 
 static __inline uint32_t __bswap32(uint32_t __x)
 {
-	return __x>>24 | __x>>8&0xff00 | __x<<8&0xff0000 | __x<<24;
+	return __x>>24 | (__x>>8&0xff00) | (__x<<8&0xff0000) | __x<<24;
 }
 
 static __inline uint64_t __bswap64(uint64_t __x)
 {
-	return __bswap32(__x)+0ULL<<32 | __bswap32(__x>>32);
+	return (__bswap32(__x)+0ULL)<<32 | __bswap32(__x>>32);
 }
 
 #if __BYTE_ORDER == __LITTLE_ENDIAN