Changeset 104168 in vbox

Timestamp:

Apr 5, 2024 8:20:51 AM (12 months ago)

Author:

vboxsync

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

162596

Message:

VMM/IEM: Fix the interpreter implementation of IEM_MC_FETCH_YREG_U64, bugref:10641

Location:

trunk/src/VBox/VMM/include

Files:

• IEMMc.h (modified) (1 diff)
• IEMN8veRecompilerEmit.h (modified) (2 diffs)

trunk/src/VBox/VMM/include/IEMMc.h

@@ -636 +636 @@
 #define IEM_MC_FETCH_YREG_U64(a_u64Dst, a_iYRegSrc, a_iQWord) \
     do { uintptr_t const iYRegSrcTmp    = (a_iYRegSrc); \
-         (a_u64Dst) = pVCpu->cpum.GstCtx.XState.x87.aXMM[iYRegSrcTmp].au64[(a_iQWord)]; \
+         if ((a_iQWord) < 2) \
+            (a_u64Dst) = pVCpu->cpum.GstCtx.XState.x87.aXMM[iYRegSrcTmp].au64[(a_iQWord)]; \
+         else \
+            (a_u64Dst) = pVCpu->cpum.GstCtx.XState.u.YmmHi.aYmmHi[iYRegSrcTmp].au64[(a_iQWord) - 2]; \
     } while (0)
 #define IEM_MC_FETCH_YREG_U128(a_u128Dst, a_iYRegSrc, a_iDQword) \

trunk/src/VBox/VMM/include/IEMN8veRecompilerEmit.h

@@ -8308 +8308 @@
          * So we use the following sequence:
          *     vextracti128 vectmp0, vecsrc, 1
-         *     pextrd       gpr, vectmp0, #(iQWord - 2)
+         *     pextrq       gpr, vectmp0, #(iQWord - 2)
          */
         /* vextracti128 */
@@ -8318 +8318 @@
         pCodeBuf[off++] = 0x1;
 
-        /* pextrd gpr, vecsrc, #iDWord (ASSUMES SSE4.1). */
+        /* pextrq */
         pCodeBuf[off++] = X86_OP_PRF_SIZE_OP;
         pCodeBuf[off++] =   X86_OP_REX_W