diff options
| author | yann.collet.73@gmail.com <yann.collet.73@gmail.com@650e7d94-2a16-8b24-b05c-7c0b3f6821cd> | 2012-12-21 16:49:17 (GMT) |
|---|---|---|
| committer | yann.collet.73@gmail.com <yann.collet.73@gmail.com@650e7d94-2a16-8b24-b05c-7c0b3f6821cd> | 2012-12-21 16:49:17 (GMT) |
| commit | 26b82f35d8ad765d223c4f1deec0678b6c90ed40 (patch) | |
| tree | c7ec6be72944e7d19d4241e79fec924ad48ccb8c /lz4hc.c | |
| parent | 024f83c1e56de5b7784d51d990359ef283a1d48c (diff) | |
| download | lz4-26b82f35d8ad765d223c4f1deec0678b6c90ed40.zip lz4-26b82f35d8ad765d223c4f1deec0678b6c90ed40.tar.gz lz4-26b82f35d8ad765d223c4f1deec0678b6c90ed40.tar.bz2 | |
Improved endianess detection
git-svn-id: https://lz4.googlecode.com/svn/trunk@86 650e7d94-2a16-8b24-b05c-7c0b3f6821cd
Diffstat (limited to 'lz4hc.c')
| -rw-r--r-- | lz4hc.c | 32 |
1 files changed, 24 insertions, 8 deletions
@@ -37,23 +37,39 @@ //**************************************
// 32 or 64 bits ?
#if (defined(__x86_64__) || defined(__x86_64) || defined(__amd64__) || defined(__amd64) || defined(__ppc64__) || defined(_WIN64) || defined(__LP64__) || defined(_LP64) ) // Detects 64 bits mode
-#define LZ4_ARCH64 1
+# define LZ4_ARCH64 1
#else
-#define LZ4_ARCH64 0
+# define LZ4_ARCH64 0
#endif
-// Little Endian or Big Endian ?
-#if (defined(__BIG_ENDIAN__) || defined(__BIG_ENDIAN) || defined(_BIG_ENDIAN) || defined(_ARCH_PPC) || defined(__PPC__) || defined(__PPC) || defined(PPC) || defined(__powerpc__) || defined(__powerpc) || defined(powerpc) || ((defined(__BYTE_ORDER__)&&(__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__))) )
-#define LZ4_BIG_ENDIAN 1
+// Little Endian or Big Endian ?
+// Overwrite the #define below if you know your architecture endianess
+#if defined (__GLIBC__)
+# include <endian.h>
+# if (__BYTE_ORDER == __BIG_ENDIAN)
+# define LZ4_BIG_ENDIAN 1
+# endif
+#elif (defined(__BIG_ENDIAN__) || defined(__BIG_ENDIAN) || defined(_BIG_ENDIAN)) && !(defined(__LITTLE_ENDIAN__) || defined(__LITTLE_ENDIAN) || defined(_LITTLE_ENDIAN))
+# define LZ4_BIG_ENDIAN 1
+#elif defined(__sparc) || defined(__sparc__) \
+ || defined(__ppc__) || defined(_POWER) || defined(__powerpc__) || defined(_ARCH_PPC) || defined(__PPC__) || defined(__PPC) || defined(PPC) || defined(__powerpc__) || defined(__powerpc) || defined(powerpc) \
+ || defined(__hpux) || defined(__hppa) \
+ || defined(_MIPSEB) || defined(__s390__)
+# define LZ4_BIG_ENDIAN 1
#else
// Little Endian assumed. PDP Endian and other very rare endian format are unsupported.
#endif
// Unaligned memory access is automatically enabled for "common" CPU, such as x86.
// For others CPU, the compiler will be more cautious, and insert extra code to ensure aligned access is respected
-// If you know your target CPU supports unaligned memory access, you may want to force this option manually to improve performance
+// If you know your target CPU supports unaligned memory access, you want to force this option manually to improve performance
#if defined(__ARM_FEATURE_UNALIGNED)
-#define LZ4_FORCE_UNALIGNED_ACCESS 1
+# define LZ4_FORCE_UNALIGNED_ACCESS 1
+#endif
+
+// Define this parameter if your target system or compiler does not support hardware bit count
+#if defined(_MSC_VER) && defined(_WIN32_WCE) // Visual Studio for Windows CE does not support Hardware bit count
+# define LZ4_FORCE_SW_BITCOUNT
#endif
@@ -63,7 +79,7 @@ #if __STDC_VERSION__ >= 199901L // C99
/* "restrict" is a known keyword */
#else
-#define restrict // Disable restrict
+# define restrict // Disable restrict
#endif
#ifdef _MSC_VER
|