From 0b434e7c6c589a8e60f7577975d147d392aa6c1b Mon Sep 17 00:00:00 2001
From: Aleksandar Andrejevic <aandrejevic@reactos.org>
Date: Fri, 21 Feb 2014 01:29:13 +0000
Subject: [PATCH] [FAST486] Add a macro ALIGNMENT_CHECK that checks for
 unaligned pointers and generates an exception.

svn path=/branches/ntvdm/; revision=62279
---
 lib/fast486/common.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/fast486/common.h b/lib/fast486/common.h
index a97f1c5ac2d..1bfdb311ef2 100644
--- a/lib/fast486/common.h
+++ b/lib/fast486/common.h
@@ -55,6 +55,15 @@ if (State->PrefixFlags & FAST486_PREFIX_LOCK)\
 
 #define SWAP(x, y) { (x) ^= (y); (y) ^= (x); (x) ^= (y); }
 
+#define ALIGNMENT_CHECK(x, a) if (State->Flags.Ac \
+                                  && (State->ControlRegisters[FAST486_REG_CR0] & FAST486_CR0_AM)\
+                                  && (State->Cpl == 3)\
+                                  && (((x) % (a)) != 0))\
+{\
+    Fast486Exception(State, FAST486_EXCEPTION_AC);\
+    return FALSE;\
+}
+
 #define PAGE_ALIGN(x)   ((x) & 0xFFFFF000)
 #define PAGE_OFFSET(x)  ((x) & 0x00000FFF)
 #define GET_ADDR_PDE(x) ((x) >> 22)