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authorUlrich Drepper <drepper@redhat.com>1998-10-01 11:00:26 +0000
committerUlrich Drepper <drepper@redhat.com>1998-10-01 11:00:26 +0000
commit7782d0bf55c294b7ed872e2590fcf4a683be5e05 (patch)
tree1e61d31c86a72090043c69ac0a2b41d25e4f86c4 /sysdeps/i386/bits/byteswap.h
parente3e4e463cf18e47448e92f6cb2c126b9828cd2ca (diff)
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Update.
	* sys/types.h: Protect use of long long by __extension__.
	* stdlib/stdlib.h: Likewise.
	* string/string.h: Likewise.
	* sysdeps/i386/bits/byteswap.h: Likewise.
	* sysdeps/geeric/bits/byteswap.h: Likewise.
	* sysdeps/i386/fpu/bits/mathinline.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/types.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/types.h: Likewise.
	* sysdeps/wordsize-32/inttypes.h: Likewise.
	* sysdeps/wordsize-32/stdint.h: Likewise.
	* wcsmbs/wchar.h: Likewise.
Diffstat (limited to 'sysdeps/i386/bits/byteswap.h')
-rw-r--r--sysdeps/i386/bits/byteswap.h72
1 files changed, 38 insertions, 34 deletions
diff --git a/sysdeps/i386/bits/byteswap.h b/sysdeps/i386/bits/byteswap.h
index 760e0751c9..a1ba6b8748 100644
--- a/sysdeps/i386/bits/byteswap.h
+++ b/sysdeps/i386/bits/byteswap.h
@@ -27,15 +27,16 @@
 
 #if defined __GNUC__ && __GNUC__ >= 2
 # define __bswap_16(x) \
-     ({ register unsigned short int __v;				      \
-	if (__builtin_constant_p (x))					      \
-	  __v = __bswap_constant_16 (x);				      \
-	else								      \
-	  __asm__ __volatile__ ("rorw $8, %w0"				      \
-				: "=r" (__v)				      \
-				: "0" ((unsigned short int) (x))	      \
-				: "cc");				      \
-	__v; })
+     (__extension__							      \
+      ({ register unsigned short int __v;				      \
+	 if (__builtin_constant_p (x))					      \
+	   __v = __bswap_constant_16 (x);				      \
+	 else								      \
+	   __asm__ __volatile__ ("rorw $8, %w0"				      \
+				 : "=r" (__v)				      \
+				 : "0" ((unsigned short int) (x))	      \
+				 : "cc");				      \
+	 __v; }))
 #else
 /* This is better than nothing.  */
 # define __bswap_16(x) __bswap_constant_16 (x)
@@ -52,27 +53,29 @@
    `bswap' opcode.  On i386 we have to use three instructions.  */
 # if !defined __i486__ && !defined __pentium__ && !defined __pentiumpro__
 #  define __bswap_32(x) \
-     ({ register unsigned int __v;					      \
-	if (__builtin_constant_p (x))					      \
-	  __v = __bswap_constant_32 (x);				      \
-	else								      \
-	  __asm__ __volatile__ ("rorw $8, %w0;"				      \
-				"rorl $16, %0;"				      \
-				"rorw $8, %w0"				      \
-				: "=r" (__v)				      \
-				: "0" ((unsigned int) (x))		      \
-				: "cc");				      \
-	__v; })
+     (__extension__							      \
+      ({ register unsigned int __v;					      \
+	 if (__builtin_constant_p (x))					      \
+	   __v = __bswap_constant_32 (x);				      \
+	 else								      \
+	   __asm__ __volatile__ ("rorw $8, %w0;"			      \
+				 "rorl $16, %0;"			      \
+				 "rorw $8, %w0"				      \
+				 : "=r" (__v)				      \
+				 : "0" ((unsigned int) (x))		      \
+				 : "cc");				      \
+	 __v; }))
 # else
 #  define __bswap_32(x) \
-     ({ register unsigned int __v;					      \
-	if (__builtin_constant_p (x))					      \
-	  __v = __bswap_constant_32 (x);				      \
-	else								      \
-	  __asm__ __volatile__ ("bswap %0"				      \
-				: "=r" (__v)				      \
-				: "0" ((unsigned int) (x)));		      \
-	__v; })
+     (__extension__							      \
+      ({ register unsigned int __v;					      \
+	 if (__builtin_constant_p (x))					      \
+	   __v = __bswap_constant_32 (x);				      \
+	 else								      \
+	   __asm__ __volatile__ ("bswap %0"				      \
+				 : "=r" (__v)				      \
+				 : "0" ((unsigned int) (x)));		      \
+	 __v; }))
 # endif
 #else
 # define __bswap_32(x) __bswap_constant_32 (x)
@@ -82,10 +85,11 @@
 #if defined __GNUC__ && __GNUC__ >= 2
 /* Swap bytes in 64 bit value.  */
 # define __bswap_64(x) \
-     ({ union { unsigned long long int __ll;				      \
-		unsigned long int __l[2]; } __w, __r;			      \
-        __w.__ll = (x);							      \
-	__r.__l[0] = __bswap_32 (__w.__l[1]);				      \
-	__r.__l[1] = __bswap_32 (__w.__l[0]);				      \
-	__r.__ll; })
+     (__extension__							      \
+      ({ union { __extension__ unsigned long long int __ll;		      \
+		 unsigned long int __l[2]; } __w, __r;			      \
+	 __w.__ll = (x);						      \
+	 __r.__l[0] = __bswap_32 (__w.__l[1]);				      \
+	 __r.__l[1] = __bswap_32 (__w.__l[0]);				      \
+	 __r.__ll; }))
 #endif