Changeset 101570 in vbox for trunk/src

Timestamp:

Oct 24, 2023 12:46:54 AM (16 months ago)

Author:

vboxsync

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

159651

Message:

VMM/IEM: Native IEM_MC_IF_EFL_BIT_NOT_SET translation. bugref:10371

Location:

trunk/src/VBox/VMM/VMMAll

Files:

• IEMAllInstPython.py (modified) (1 diff)
• IEMAllN8veRecompiler.cpp (modified) (1 diff)

trunk/src/VBox/VMM/VMMAll/IEMAllInstPython.py

@@ -2887 +2887 @@
     'IEM_MC_IF_ECX_IS_NZ_AND_EFL_BIT_SET':                       (McBlock.parseMcGenericCond,       True,  False, ),
     'IEM_MC_IF_EFL_ANY_BITS_SET':                                (McBlock.parseMcGenericCond,       True,  True,  ),
-    'IEM_MC_IF_EFL_BIT_NOT_SET':                                 (McBlock.parseMcGenericCond,       True,  False, ),
+    'IEM_MC_IF_EFL_BIT_NOT_SET':                                 (McBlock.parseMcGenericCond,       True,  True,  ),
     'IEM_MC_IF_EFL_BIT_NOT_SET_AND_BITS_EQ':                     (McBlock.parseMcGenericCond,       True,  False, ),
     'IEM_MC_IF_EFL_BIT_SET':                                     (McBlock.parseMcGenericCond,       True,  True,  ),

trunk/src/VBox/VMM/VMMAll/IEMAllN8veRecompiler.cpp

@@ -4343 +4343 @@
 
 
+#define IEM_MC_IF_EFL_BIT_NOT_SET(a_fBit) \
+        off = iemNativeEmitIfEflagsBitNotSet(pReNative, off, (a_fBit)); \
+        AssertReturn(off != UINT32_MAX, UINT32_MAX); \
+        do {
+
+/** Emits code for IEM_MC_IF_EFL_BIT_NOT_SET. */
+DECLINLINE(uint32_t) iemNativeEmitIfEflagsBitNotSet(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint32_t fBitInEfl)
+{
+    PIEMNATIVECOND pEntry = iemNativeCondPushIf(pReNative);
+    AssertReturn(pEntry, UINT32_MAX);
+
+    /* Get the eflags. */
+    uint8_t const idxEflReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, kIemNativeGstReg_EFlags,
+                                                              kIemNativeGstRegUse_ReadOnly);
+    AssertReturn(idxEflReg != UINT8_MAX, UINT32_MAX);
+
+    unsigned const iBitNo = ASMBitFirstSetU32(fBitInEfl) - 1;
+    Assert(RT_BIT_32(iBitNo) == fBitInEfl);
+
+    /* Test and jump. */
+    off = iemNativeEmitTestBitInGprAndJmpToLabelIfNotSet(pReNative, off, idxEflReg, iBitNo, pEntry->idxLabelElse);
+
+    /* Free but don't flush the EFlags register. */
+    iemNativeRegFreeTmp(pReNative, idxEflReg);
+
+    /* Make a copy of the core state now as we start the if-block. */
+    iemNativeCondStartIfBlock(pReNative, off);
+
+    return off;
+}
+
+
 
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