Changeset 106994 in vbox for trunk/src/VBox/Runtime/common

Timestamp:

Nov 13, 2024 4:43:36 PM (5 months ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

165930

Message:

IPRT/memset.cpp: Try prevent the compiler from optimizing anything into a memset call. jiraref:VBP-1442

File:

• trunk/src/VBox/Runtime/common/string/memset.cpp (modified) (1 diff)

trunk/src/VBox/Runtime/common/string/memset.cpp

@@ -78 +78 @@
 
     /* Remaining byte moves. */
-    c = cb & 3;
-    while (c-- > 0)
-        *u.pu8++ = (uint8_t)u32;
+    switch (cb & 3)
+    {
+        case 0:
+            break;
+        case 3:
+            *u.pu8++ = (uint8_t)u32;
+            RT_FALL_THRU();
+        case 2:
+            *u.pu8++ = (uint8_t)u32;
+            RT_FALL_THRU();
+        case 1:
+            *u.pu8++ = (uint8_t)u32;
+            break;
+    }
 
     return pvDst;