Index: trunk/src/VBox/Runtime/Makefile.kmk
===================================================================
--- trunk/src/VBox/Runtime/Makefile.kmk	(revision 87184)
+++ trunk/src/VBox/Runtime/Makefile.kmk	(revision 87185)
@@ -769,7 +769,13 @@
 RuntimeR3_SOURCES.arm32 := \
 	common/asm/ASMMemZeroPage-generic.cpp \
+	common/asm/ASMMemZero32-generic.cpp \
+	common/asm/ASMMemFill32-generic.cpp \
+	common/asm/ASMMemFirstMismatchingU8-generic.cpp \
 	common/misc/zero-alt.S
 RuntimeR3_SOURCES.arm64 := \
 	common/asm/ASMMemZeroPage-generic.cpp \
+	common/asm/ASMMemZero32-generic.cpp \
+	common/asm/ASMMemFill32-generic.cpp \
+	common/asm/ASMMemFirstMismatchingU8-generic.cpp \
 	common/misc/zero-alt.S
 RuntimeR3_SOURCES.sparc32 += \
Index: trunk/src/VBox/Runtime/common/asm/ASMMemFill32-generic.cpp
===================================================================
--- trunk/src/VBox/Runtime/common/asm/ASMMemFill32-generic.cpp	(revision 87185)
+++ trunk/src/VBox/Runtime/common/asm/ASMMemFill32-generic.cpp	(revision 87185)
@@ -0,0 +1,64 @@
+/* $Id$ */
+/** @file
+ * IPRT - ASMMemZeroPage - generic C implementation.
+ */
+
+/*
+ * Copyright (C) 2021 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include <iprt/asm.h>
+#include "internal/iprt.h"
+
+#include <iprt/string.h>
+#include <iprt/assert.h>
+
+
+RT_ASM_DECL_PRAGMA_WATCOM(void) ASMMemFill32(volatile void RT_FAR *pv, size_t cb, uint32_t u32) RT_NOTHROW_DEF
+{
+    Assert(!(cb & 3));
+    size_t cFills = cb / sizeof(uint32_t);
+    uint32_t *pu32Dst = (uint32_t *)pv;
+
+    while (cFills >= 8)
+    {
+        pu32Dst[0] = u32;
+        pu32Dst[1] = u32;
+        pu32Dst[2] = u32;
+        pu32Dst[3] = u32;
+        pu32Dst[4] = u32;
+        pu32Dst[5] = u32;
+        pu32Dst[6] = u32;
+        pu32Dst[7] = u32;
+        pu32Dst += 8;
+        cFills  -= 8;
+    }
+
+    while (cFills > 0)
+    {
+        *pu32Dst++ = u32;
+        cFills -= 1;
+    }
+}
+
Index: trunk/src/VBox/Runtime/common/asm/ASMMemFirstMismatchingU8-generic.cpp
===================================================================
--- trunk/src/VBox/Runtime/common/asm/ASMMemFirstMismatchingU8-generic.cpp	(revision 87185)
+++ trunk/src/VBox/Runtime/common/asm/ASMMemFirstMismatchingU8-generic.cpp	(revision 87185)
@@ -0,0 +1,45 @@
+/* $Id$ */
+/** @file
+ * IPRT - ASMMemZeroPage - generic C implementation.
+ */
+
+/*
+ * Copyright (C) 2006-2021 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include <iprt/asm.h>
+#include "internal/iprt.h"
+
+
+DECLASM(void *) ASMMemFirstMismatchingU8(void const RT_FAR *pv, size_t cb, uint8_t u8) RT_NOTHROW_DEF
+{
+    uint8_t const *pb = (uint8_t const RT_FAR *)pv;
+    for (; cb; cb--, pb++)
+        if (RT_LIKELY(*pb == u8))
+        { /* likely */ }
+        else
+            return (void *)pb;
+    return NULL;
+}
+
Index: trunk/src/VBox/Runtime/common/asm/ASMMemZero32-generic.cpp
===================================================================
--- trunk/src/VBox/Runtime/common/asm/ASMMemZero32-generic.cpp	(revision 87185)
+++ trunk/src/VBox/Runtime/common/asm/ASMMemZero32-generic.cpp	(revision 87185)
@@ -0,0 +1,41 @@
+/* $Id$ */
+/** @file
+ * IPRT - ASMMemZero32 - generic C implementation.
+ */
+
+/*
+ * Copyright (C) 2021 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include <iprt/asm.h>
+#include "internal/iprt.h"
+
+#include <iprt/string.h>
+
+
+RT_ASM_DECL_PRAGMA_WATCOM(void) ASMMemZero32(volatile void RT_FAR *pv, size_t cb) RT_NOTHROW_DEF
+{
+    memset((void *)pv, 0, cb);
+}
+
