Changeset 100231 in vbox for trunk/src/VBox/VMM/include/IEMInternal.h

Timestamp:

Jun 20, 2023 11:10:27 PM (18 months ago)

Author:

vboxsync

Message:

VMM/IEM: Recompiler fixes. Gets thru the bios now. bugref:10369

File:

• trunk/src/VBox/VMM/include/IEMInternal.h (modified) (1 diff)

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

@@ -3835 +3835 @@
  */
 #define IEM_GET_MODRM_RM_8(a_bRm)           ( ((a_bRm) & X86_MODRM_RM_MASK) )
+
+/**
+ * Gets the register (reg) part of a ModR/M encoding as an extended 8-bit
+ * register index, with REX.R added in.
+ *
+ * For use during decoding.
+ *
+ * @see iemGRegRefU8Ex, iemGRegFetchU8Ex, iemGRegStoreU8Ex
+ */
+#define IEM_GET_MODRM_REG_EX8(a_pVCpu, a_bRm) \
+    (   (pVCpu->iem.s.fPrefixes & IEM_OP_PRF_REX) \
+     || !((a_bRm) & (4 << X86_MODRM_REG_SHIFT)) /* IEM_GET_MODRM_REG(pVCpu, a_bRm) < 4 */ \
+     ? IEM_GET_MODRM_REG(pVCpu, a_bRm) : (((a_bRm) >> X86_MODRM_REG_SHIFT) & 3) | 16)
+/**
+ * Gets the r/m part of a ModR/M encoding as an extended 8-bit register index,
+ * with REX.B added in.
+ *
+ * For use during decoding.
+ *
+ * @see iemGRegRefU8Ex, iemGRegFetchU8Ex, iemGRegStoreU8Ex
+ */
+#define IEM_GET_MODRM_RM_EX8(a_pVCpu, a_bRm) \
+    (   (pVCpu->iem.s.fPrefixes & IEM_OP_PRF_REX) \
+     || !((a_bRm) & 4) /* IEM_GET_MODRM_RM(pVCpu, a_bRm) < 4 */ \
+     ? IEM_GET_MODRM_RM(pVCpu, a_bRm) : ((a_bRm) & 3) | 16)
 
 /**