Index: /trunk/src/VBox/Runtime/common/asm/ASMBitFirstClear.asm
===================================================================
--- /trunk/src/VBox/Runtime/common/asm/ASMBitFirstClear.asm	(revision 58761)
+++ /trunk/src/VBox/Runtime/common/asm/ASMBitFirstClear.asm	(revision 58762)
@@ -50,5 +50,5 @@
         mov     ecx, esi
  %else
-        xchg    ecx, edx                ; rdx=pvDst, ecx=cBits
+        xchg    rcx, rdx                ; rdx=pvDst, ecx=cBits
  %endif
 %elif ARCH_BITS == 32
Index: /trunk/src/VBox/Runtime/common/asm/ASMBitFirstSet.asm
===================================================================
--- /trunk/src/VBox/Runtime/common/asm/ASMBitFirstSet.asm	(revision 58761)
+++ /trunk/src/VBox/Runtime/common/asm/ASMBitFirstSet.asm	(revision 58762)
@@ -50,5 +50,5 @@
         mov     ecx, esi
  %else
-        xchg    ecx, edx                ; rdx=pvDst, ecx=cBits
+        xchg    rcx, rdx                ; rdx=pvDst, ecx=cBits
  %endif
 %elif ARCH_BITS == 32