Make use of htonl() and <nowiki>__builtin_bswap32()</nowiki> for faster

implementations of sqlite3Get4byte() and sqlite3Put4byte().

FossilOrigin-Name: bc27ebd7f73e9fc8e00da6ec82632e439fcce812

1 files changed, 24 insertions, 0 deletions

diff --git a/src/util.c b/src/util.c
index 8fdaf2678..f2d3e91e7 100644
--- a/src/util.c
+++ b/src/util.c
@@ -1078,14 +1078,38 @@ int sqlite3VarintLen(u64 v){
 ** Read or write a four-byte big-endian integer value.
 */
 u32 sqlite3Get4byte(const u8 *p){
+#if SQLITE_BYTEORDER==4321
+  u32 x;
+  memcpy(&x,p,4);
+  return x;
+#elif defined(_MSC_VER)
+  u32 x;
+  memcpy(&x,p,4);
+  return htonl(x);
+#elif SQLITE_BYTEORDER==1234 && defined(__GNUC__)
+  u32 x;
+  memcpy(&x,p,4);
+  return __builtin_bswap32(x);
+#else
   testcase( p[0]&0x80 );
   return ((unsigned)p[0]<<24) | (p[1]<<16) | (p[2]<<8) | p[3];
+#endif
 }
 void sqlite3Put4byte(unsigned char *p, u32 v){
+#if SQLITE_BYTEORDER==4321
+  memcpy(p,&v,4);
+#elif defined(_MSC_VER)
+  u32 x = htonl(v);
+  memcpy(&x,p,4);
+#elif SQLITE_BYTEORDER==1234 && defined(__GNUC__)
+  u32 x = __builtin_bswap32(v);
+  memcpy(p,&x,4);
+#else
   p[0] = (u8)(v>>24);
   p[1] = (u8)(v>>16);
   p[2] = (u8)(v>>8);
   p[3] = (u8)v;
+#endif
 }