From 9da81c79a2c6c91950b316fd89eeeac5b26f0d93 Mon Sep 17 00:00:00 2001
From: gbeauche <>
Date: Mon, 26 Jan 2004 13:52:31 +0000
Subject: [PATCH] Use bswap instruction on IA-32 too. Optimize bswap_64 on
 little-endian (x86 for now) systems.

---
 SheepShaver/src/Unix/sysdeps.h | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/SheepShaver/src/Unix/sysdeps.h b/SheepShaver/src/Unix/sysdeps.h
index 8fe237be..9d52661e 100644
--- a/SheepShaver/src/Unix/sysdeps.h
+++ b/SheepShaver/src/Unix/sysdeps.h
@@ -139,7 +139,7 @@ typedef int64 intptr;
  **/
 
 #if defined(__GNUC__)
-#if defined(__x86_64__)
+#if defined(__x86_64__) || defined(__i386__)
 // Linux/AMD64 currently has no asm optimized bswap_32() in <byteswap.h>
 #define opt_bswap_32 do_opt_bswap_32
 static inline uint32 do_opt_bswap_32(uint32 x)
@@ -184,6 +184,14 @@ static inline uint32 generic_bswap_32(uint32 x)
 		  ((x & 0x000000ff) << 24) );
 }
 
+#if defined(__i386__)
+#define opt_bswap_64 do_opt_bswap_64
+static inline uint64 do_opt_bswap_64(uint64 x)
+{
+  return (bswap_32(x >> 32) | (((uint64)bswap_32((uint32)x)) << 32));
+}
+#endif
+
 #ifdef  opt_bswap_64
 #undef  bswap_64
 #define bswap_64 opt_bswap_64