Changeset 22005 in vbox for trunk/include

Timestamp:

Aug 5, 2009 6:41:01 PM (15 years ago)

Author:

vboxsync

Message:

ASMMemIsZeroPage: require 16-byte alignment.

File:

• trunk/include/iprt/asm.h (modified) (3 diffs)

trunk/include/iprt/asm.h

@@ -5057 +5057 @@
  * @returns true / false.
  *
- * @param   pvPage      Pointer to the page.  This must be naturally aligned if
- *                      not page aligned.
+ * @param   pvPage      Pointer to the page.  Must be aligned on 16 byte
+ *                      boundrary
  */
 DECLINLINE(bool) ASMMemIsZeroPage(void const *pvPage)
@@ -5065 +5065 @@
     union { RTCCUINTREG r; bool f; } uAX;
     RTCCUINTREG xCX, xDI;
-   Assert(!((uintptr_t)pvPage & (sizeof(uintptr_t) - 1)));
+   Assert(!((uintptr_t)pvPage & 15));
     __asm__ __volatile__("repe; "
 #  ifdef RT_ARCH_AMD64
@@ -5088 +5088 @@
    uintptr_t const *puPtr = (uintptr_t const *)pvPage;
    int              cLeft = 0x1000 / sizeof(uintptr_t) / 8;
-   Assert(!((uintptr_t)pvPage & (sizeof(uintptr_t) - 1)));
+   Assert(!((uintptr_t)pvPage & 15));
    for (;;)
    {