1 files changed, 354 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/asm/asm-fake.cpp b/src/VBox/Runtime/common/asm/asm-fake.cpp
new file mode 100644
index 00000000..64f1f37e
--- /dev/null
+++ b/src/VBox/Runtime/common/asm/asm-fake.cpp
@@ -0,0 +1,354 @@
+/* $Id: asm-fake.cpp $ */
+/** @file
+ * IPRT - Fake asm.h routines for use early in a new port.
+ */
+
+/*
+ * Copyright (C) 2010-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox 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.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include <iprt/asm.h>
+#include "internal/iprt.h"
+
+#include <iprt/string.h>
+#include <iprt/param.h>
+
+
+RTDECL(uint8_t) ASMAtomicXchgU8(volatile uint8_t *pu8, uint8_t u8)
+{
+    uint8_t u8Ret = *pu8;
+    *pu8 = u8;
+    return u8Ret;
+}
+
+RTDECL(uint16_t) ASMAtomicXchgU16(volatile uint16_t *pu16, uint16_t u16)
+{
+    uint16_t u16Ret = *pu16;
+    *pu16 = u16;
+    return u16Ret;
+}
+
+RTDECL(uint32_t) ASMAtomicXchgU32(volatile uint32_t *pu32, uint32_t u32)
+{
+    uint32_t u32Ret = *pu32;
+    *pu32 = u32;
+    return u32Ret;
+}
+
+RTDECL(uint64_t) ASMAtomicXchgU64(volatile uint64_t *pu64, uint64_t u64)
+{
+    uint64_t u64Ret = *pu64;
+    *pu64 = u64;
+    return u64Ret;
+}
+
+RTDECL(bool) ASMAtomicCmpXchgU8(volatile uint8_t *pu8, const uint8_t u8New, const uint8_t u8Old)
+{
+    if (*pu8 == u8Old)
+    {
+        *pu8 = u8New;
+        return true;
+    }
+    return false;
+}
+
+RTDECL(bool) ASMAtomicCmpXchgU32(volatile uint32_t *pu32, const uint32_t u32New, const uint32_t u32Old)
+{
+    if (*pu32 == u32Old)
+    {
+        *pu32 = u32New;
+        return true;
+    }
+    return false;
+}
+
+RTDECL(bool) ASMAtomicCmpXchgU64(volatile uint64_t *pu64, const uint64_t u64New, const uint64_t u64Old)
+{
+    if (*pu64 == u64Old)
+    {
+        *pu64 = u64New;
+        return true;
+    }
+    return false;
+}
+
+RTDECL(bool) ASMAtomicCmpXchgExU32(volatile uint32_t *pu32, const uint32_t u32New, const uint32_t u32Old, uint32_t *pu32Old)
+{
+    uint32_t u32Cur = *pu32;
+    if (u32Cur == u32Old)
+    {
+        *pu32 = u32New;
+        *pu32Old = u32Old;
+        return true;
+    }
+    *pu32Old = u32Cur;
+    return false;
+}
+
+RTDECL(bool) ASMAtomicCmpXchgExU64(volatile uint64_t *pu64, const uint64_t u64New, const uint64_t u64Old, uint64_t *pu64Old)
+{
+    uint64_t u64Cur = *pu64;
+    if (u64Cur == u64Old)
+    {
+        *pu64 = u64New;
+        *pu64Old = u64Old;
+        return true;
+    }
+    *pu64Old = u64Cur;
+    return false;
+}
+
+RTDECL(uint32_t) ASMAtomicAddU32(uint32_t volatile *pu32, uint32_t u32)
+{
+    uint32_t u32Old = *pu32;
+    *pu32 = u32Old + u32;
+    return u32Old;
+}
+
+RTDECL(uint64_t) ASMAtomicAddU64(uint64_t volatile *pu64, uint64_t u64)
+{
+    uint64_t u64Old = *pu64;
+    *pu64 = u64Old + u64;
+    return u64Old;
+}
+
+RTDECL(uint32_t) ASMAtomicIncU32(uint32_t volatile *pu32)
+{
+    return *pu32 += 1;
+}
+
+RTDECL(uint32_t) ASMAtomicUoIncU32(uint32_t volatile *pu32)
+{
+    return *pu32 += 1;
+}
+
+RTDECL(uint32_t) ASMAtomicDecU32(uint32_t volatile *pu32)
+{
+    return *pu32 -= 1;
+}
+
+RTDECL(uint32_t) ASMAtomicUoDecU32(uint32_t volatile *pu32)
+{
+    return *pu32 -= 1;
+}
+
+RTDECL(uint64_t) ASMAtomicIncU64(uint64_t volatile *pu64)
+{
+    return *pu64 += 1;
+}
+
+RTDECL(uint64_t) ASMAtomicDecU64(uint64_t volatile *pu64)
+{
+    return *pu64 -= 1;
+}
+
+RTDECL(void) ASMAtomicOrU32(uint32_t volatile *pu32, uint32_t u32)
+{
+    *pu32 |= u32;
+}
+
+RTDECL(void) ASMAtomicUoOrU32(uint32_t volatile *pu32, uint32_t u32)
+{
+    *pu32 |= u32;
+}
+
+RTDECL(void) ASMAtomicAndU32(uint32_t volatile *pu32, uint32_t u32)
+{
+    *pu32 &= u32;
+}
+
+RTDECL(void) ASMAtomicUoAndU32(uint32_t volatile *pu32, uint32_t u32)
+{
+    *pu32 &= u32;
+}
+
+RTDECL(void) ASMAtomicOrU64(uint64_t volatile *pu64, uint64_t u64)
+{
+    *pu64 |= u64;
+}
+
+RTDECL(void) ASMAtomicAndU64(uint64_t volatile *pu64, uint64_t u64)
+{
+    *pu64 &= u64;
+}
+
+RTDECL(void) ASMSerializeInstruction(void)
+{
+
+}
+
+RTDECL(uint64_t) ASMAtomicReadU64(volatile uint64_t *pu64)
+{
+    return *pu64;
+}
+
+RTDECL(uint64_t) ASMAtomicUoReadU64(volatile uint64_t *pu64)
+{
+    return *pu64;
+}
+
+RTDECL(uint8_t) ASMProbeReadByte(const void *pvByte)
+{
+    return *(volatile uint8_t *)pvByte;
+}
+
+#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
+RTDECL(void) ASMNopPause(void)
+{
+}
+#endif
+
+RTDECL(void) ASMBitSet(volatile void *pvBitmap, int32_t iBit)
+{
+    uint8_t volatile *pau8Bitmap = (uint8_t volatile *)pvBitmap;
+    pau8Bitmap[iBit / 8] |= (uint8_t)RT_BIT_32(iBit & 7);
+}
+
+RTDECL(void) ASMAtomicBitSet(volatile void *pvBitmap, int32_t iBit)
+{
+    ASMBitSet(pvBitmap, iBit);
+}
+
+RTDECL(void) ASMBitClear(volatile void *pvBitmap, int32_t iBit)
+{
+    uint8_t volatile *pau8Bitmap = (uint8_t volatile *)pvBitmap;
+    pau8Bitmap[iBit / 8] &= ~((uint8_t)RT_BIT_32(iBit & 7));
+}
+
+RTDECL(void) ASMAtomicBitClear(volatile void *pvBitmap, int32_t iBit)
+{
+    ASMBitClear(pvBitmap, iBit);
+}
+
+RTDECL(void) ASMBitToggle(volatile void *pvBitmap, int32_t iBit)
+{
+    uint8_t volatile *pau8Bitmap = (uint8_t volatile *)pvBitmap;
+    pau8Bitmap[iBit / 8] ^= (uint8_t)RT_BIT_32(iBit & 7);
+}
+
+RTDECL(void) ASMAtomicBitToggle(volatile void *pvBitmap, int32_t iBit)
+{
+    ASMBitToggle(pvBitmap, iBit);
+}
+
+RTDECL(bool) ASMBitTestAndSet(volatile void *pvBitmap, int32_t iBit)
+{
+    if (ASMBitTest(pvBitmap, iBit))
+        return true;
+    ASMBitSet(pvBitmap, iBit);
+    return false;
+}
+
+RTDECL(bool) ASMAtomicBitTestAndSet(volatile void *pvBitmap, int32_t iBit)
+{
+    return ASMBitTestAndSet(pvBitmap, iBit);
+}
+
+RTDECL(bool) ASMBitTestAndClear(volatile void *pvBitmap, int32_t iBit)
+{
+    if (!ASMBitTest(pvBitmap, iBit))
+        return false;
+    ASMBitClear(pvBitmap, iBit);
+    return true;
+}
+
+RTDECL(bool) ASMAtomicBitTestAndClear(volatile void *pvBitmap, int32_t iBit)
+{
+    return ASMBitTestAndClear(pvBitmap, iBit);
+}
+
+RTDECL(bool) ASMBitTestAndToggle(volatile void *pvBitmap, int32_t iBit)
+{
+    bool fRet = ASMBitTest(pvBitmap, iBit);
+    ASMBitToggle(pvBitmap, iBit);
+    return fRet;
+}
+
+RTDECL(bool) ASMAtomicBitTestAndToggle(volatile void *pvBitmap, int32_t iBit)
+{
+    return ASMBitTestAndToggle(pvBitmap, iBit);
+}
+
+RTDECL(bool) ASMBitTest(const volatile void *pvBitmap, int32_t iBit)
+{
+    uint8_t volatile *pau8Bitmap = (uint8_t volatile *)pvBitmap;
+    return  pau8Bitmap[iBit / 8] & (uint8_t)RT_BIT_32(iBit & 7) ? true : false;
+}
+
+RTDECL(unsigned) ASMBitFirstSetU32(uint32_t u32)
+{
+    uint32_t iBit;
+    for (iBit = 0; iBit < 32; iBit++)
+        if (u32 & RT_BIT_32(iBit))
+            return iBit + 1;
+    return 0;
+}
+
+RTDECL(unsigned) ASMBitLastSetU32(uint32_t u32)
+{
+    uint32_t iBit = 32;
+    while (iBit-- > 0)
+        if (u32 & RT_BIT_32(iBit))
+            return iBit + 1;
+    return 0;
+}
+
+RTDECL(unsigned) ASMBitFirstSetU64(uint64_t u64)
+{
+    uint32_t iBit;
+    for (iBit = 0; iBit < 64; iBit++)
+        if (u64 & RT_BIT_64(iBit))
+            return iBit + 1;
+    return 0;
+}
+
+RTDECL(unsigned) ASMBitLastSetU64(uint64_t u64)
+{
+    uint32_t iBit = 64;
+    while (iBit-- > 0)
+        if (u64 & RT_BIT_64(iBit))
+            return iBit + 1;
+    return 0;
+}
+
+RTDECL(uint16_t) ASMByteSwapU16(uint16_t u16)
+{
+    return RT_MAKE_U16(RT_HIBYTE(u16), RT_LOBYTE(u16));
+}
+
+RTDECL(uint32_t) ASMByteSwapU32(uint32_t u32)
+{
+    return RT_MAKE_U32_FROM_U8(RT_BYTE4(u32), RT_BYTE3(u32), RT_BYTE2(u32), RT_BYTE1(u32));
+}
+