Changeset 22015 in vbox for trunk/src/VBox/VMM

Timestamp:

Aug 6, 2009 8:39:54 AM (15 years ago)

Author:

vboxsync

Message:

Removed unnecessary TPR patch instructions

File:

• trunk/src/VBox/VMM/HWACCM.cpp (modified) (2 diffs)

trunk/src/VBox/VMM/HWACCM.cpp

@@ -1771 +1771 @@
                 *
                 */
+            bool fUsesEax = (pDis->param2.flags == USE_REG_GEN32 && pDis->param2.base.reg_gen == USE_REG_EAX);
+
             aPatch[off++] = 0x51;    /* push ecx */
             aPatch[off++] = 0x52;    /* push edx */
-            aPatch[off++] = 0x50;    /* push eax */
+            if (!fUsesEax)
+                aPatch[off++] = 0x50;    /* push eax */
             aPatch[off++] = 0x31;    /* xor edx, edx */
             aPatch[off++] = 0xD2;
             if (pDis->param2.flags == USE_REG_GEN32)
             {
-                if (pDis->param2.base.reg_gen != USE_REG_EAX)
+                if (!fUsesEax)
                 {
                     aPatch[off++] = 0x89;    /* mov eax, src_reg */
@@ -1797 +1800 @@
             aPatch[off++] = 0x0F;    /* wrmsr */
             aPatch[off++] = 0x30;
-            aPatch[off++] = 0x58;    /* pop eax */
+            if (!fUsesEax)
+                aPatch[off++] = 0x58;    /* pop eax */
             aPatch[off++] = 0x5A;    /* pop edx */
             aPatch[off++] = 0x59;    /* pop ecx */