Changeset 101583 in vbox for trunk

Timestamp:

Oct 24, 2023 7:04:51 PM (14 months ago)

Author:

vboxsync

Message:

VMM/IEM: Native IEM_MC_IF_CX_IS_NZ implementation. 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

@@ -2880 +2880 @@
     'IEM_MC_FPU_STACK_UNDERFLOW_THEN_POP_POP':                   (McBlock.parseMcGeneric,           True,  False, ),
     'IEM_MC_FPU_TO_MMX_MODE':                                    (McBlock.parseMcGeneric,           True,  False, ),
-    'IEM_MC_IF_CX_IS_NZ':                                        (McBlock.parseMcGenericCond,       True,  False, ),
+    'IEM_MC_IF_CX_IS_NZ':                                        (McBlock.parseMcGenericCond,       True,  True,  ),
     'IEM_MC_IF_CX_IS_NZ_AND_EFL_BIT_NOT_SET':                    (McBlock.parseMcGenericCond,       True,  False, ),
     'IEM_MC_IF_CX_IS_NZ_AND_EFL_BIT_SET':                        (McBlock.parseMcGenericCond,       True,  False, ),

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

@@ -4556 +4556 @@
 
 
+#define IEM_MC_IF_CX_IS_NZ() \
+    off = iemNativeEmitIfCxIsNotZero(pReNative, off); \
+    AssertReturn(off != UINT32_MAX, UINT32_MAX); \
+    do {
+
+/** Emits code for IEM_MC_IF_EFL_BIT_NOT_SET_AND_BITS_EQ and
+ *  IEM_MC_IF_EFL_BIT_SET_OR_BITS_NE. */
+DECLINLINE(uint32_t) iemNativeEmitIfCxIsNotZero(PIEMRECOMPILERSTATE pReNative, uint32_t off)
+{
+    PIEMNATIVECOND pEntry = iemNativeCondPushIf(pReNative);
+    AssertReturn(pEntry, UINT32_MAX);
+
+    uint8_t const idxGstRcxReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off,
+                                                                 (IEMNATIVEGSTREG)(kIemNativeGstReg_GprFirst + X86_GREG_xCX),
+                                                                 kIemNativeGstRegUse_ReadOnly);
+    AssertReturn(idxGstRcxReg != UINT8_MAX, UINT32_MAX);
+    off = iemNativeEmitTestAnyBitsInGprAndJmpToLabelIfNoneSet(pReNative, off, idxGstRcxReg, UINT16_MAX, pEntry->idxLabelElse);
+    iemNativeRegFreeTmp(pReNative, idxGstRcxReg);
+
+    iemNativeCondStartIfBlock(pReNative, off);
+    return off;
+}
+
+
 
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