Changeset 40087 in vbox for trunk/src

Timestamp:

Feb 13, 2012 1:12:06 AM (13 years ago)

Author:

vboxsync

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

76225

Message:

IEM: 0xdd 11/1 seems to behave like fxch.

Location:

trunk/src/VBox/VMM

Files:

• VMMAll/IEMAllInstructions.cpp.h (modified) (1 diff)
• testcase/tstX86-1A.asm (modified) (3 diffs)

trunk/src/VBox/VMM/VMMAll/IEMAllInstructions.cpp.h

@@ -10909 +10909 @@
         {
             case 0: return FNIEMOP_CALL_1(iemOp_ffree_stN,   bRm);
-            case 1: return FNIEMOP_CALL(  iemOp_fnop);
+            case 1: return FNIEMOP_CALL_1(iemOp_fxch_stN,    bRm); /* Reserved, intel behavior is that of XCHG ST(i). */
             case 2: return FNIEMOP_CALL_1(iemOp_fst_stN,     bRm);
             case 3: return FNIEMOP_CALL_1(iemOp_fstp_stN,    bRm);

trunk/src/VBox/VMM/testcase/tstX86-1A.asm

@@ -1552 +1552 @@
 ;int3
 ;db 0dch, 0d0h
-;        fld dword REF(.r32V1)
-;        fld dword REF(.r32D0)
+        fld dword REF(.r32V2)
+        fld dword REF(.r32V2)
 ;int3
 ;db 0dch, 0d9h ; fnop?
 ;int3
+fnclex
+call SetFSW_C0_thru_C3
+int3
+db 0ddh, 0c8h
+db 0ddh, 0c9h
+db 0ddh, 0cah
+db 0ddh, 0cbh
+db 0ddh, 0cch
+db 0ddh, 0cdh
+db 0ddh, 0ceh
+db 0ddh, 0cfh
+int3
 
 
@@ -1664 +1676 @@
 
         ; the 0xdd block
-        FpuNopEncoding db 0ddh, 0c8h ; fnop?
-        FpuUnknownEncoding db 0ddh, 0c9h ; fnop?
-        FpuUnknownEncoding db 0ddh, 0cah ; fnop?
-        FpuUnknownEncoding db 0ddh, 0cbh ; fnop?
-        FpuUnknownEncoding db 0ddh, 0cch ; fnop?
-        FpuUnknownEncoding db 0ddh, 0cdh ; fnop?
-        FpuUnknownEncoding db 0ddh, 0ceh ; fnop?
-        FpuUnknownEncoding db 0ddh, 0cfh ; fnop?
+        ;FpuUnknownEncoding db 0ddh, 0c8h ; fxch?
+        ;FpuUnknownEncoding db 0ddh, 0c9h ; fxch?
+        ;FpuUnknownEncoding db 0ddh, 0cah ; fxch?
+        ;FpuUnknownEncoding db 0ddh, 0cbh ; fxch?
+        ;FpuUnknownEncoding db 0ddh, 0cch ; fxch?
+        ;FpuUnknownEncoding db 0ddh, 0cdh ; fxch?
+        ;FpuUnknownEncoding db 0ddh, 0ceh ; fxch?
+        ;FpuUnknownEncoding db 0ddh, 0cfh ; fxch?
         ShouldTrap X86_XCPT_UD, db 0ddh, 0f0h
         ShouldTrap X86_XCPT_UD, db 0ddh, 0f1h
@@ -1757 +1769 @@
 
 .r32V1: dd 3.2
+.r32V2: dd -1.9
 .r64V1: dq 6.4
 .r80V1: dt 8.0