Changeset 19524 in vbox for trunk

Timestamp:

May 8, 2009 1:26:13 PM (16 years ago)

Author:

vboxsync

Message:

iprt/asm.h: try work around gcc 4.3.3/x86 issues in ASMAtomicCmpXchgU64. (untested)

File:

• trunk/include/iprt/asm.h (modified) (2 diffs)

trunk/include/iprt/asm.h

@@ -114 +114 @@
 #endif
 
+/** @def RT_INLINE_ASM_GCC_4_3_3_X86
+ * Used to work around some 4.3.3 register allocation issues in this version
+ * of the compiler. */
+#ifdef __GNUC__
+# define RT_INLINE_ASM_GCC_4_3_3_X86 (__GNUC__ == 4 && __GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ == 3 && defined(__i386__))
+#endif
+#ifndef RT_INLINE_ASM_GCC_4_3_3_X86
+# define RT_INLINE_ASM_GCC_4_3_3_X86 0
+#endif
+
 
 
@@ -3088 +3098 @@
  * @param   u64Old  The value to compare with.
  */
-#if RT_INLINE_ASM_EXTERNAL && !RT_INLINE_ASM_USES_INTRIN
+#if (RT_INLINE_ASM_EXTERNAL && !RT_INLINE_ASM_USES_INTRIN) \
+ || (RT_INLINE_ASM_GCC_4_3_3_X86 && defined(IN_RING3) && defined(__PIC__))
 DECLASM(bool) ASMAtomicCmpXchgU64(volatile uint64_t *pu64, const uint64_t u64New, const uint64_t u64Old);
 #else