Changeset 99992 in vbox for trunk/src/VBox/VMM/include

Timestamp:

May 26, 2023 10:05:54 PM (21 months ago)

Author:

vboxsync

Message:

VMM/IEM: Corrected IEM_MC_REF_FPUREG so it'll reference the correct register - aRegs is in stack order. Only used by FXAM, so relative limited impact. Broke CALC.EXE in Win 3.11. bugref:10464

File:

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

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

@@ -1506 +1506 @@
 
 #define IEM_MC_REF_FPUREG(a_pr80Dst, a_iSt) \
-    do { (a_pr80Dst) = &pVCpu->cpum.GstCtx.XState.x87.aRegs[X86_FSW_TOP_GET_ST(pVCpu->cpum.GstCtx.XState.x87.FSW, a_iSt)].r80; } while (0)
+    do { (a_pr80Dst) = &pVCpu->cpum.GstCtx.XState.x87.aRegs[a_iSt].r80; } while (0)
 #define IEM_MC_IF_FPUREG_IS_EMPTY(a_iSt) \
     if (iemFpuStRegNotEmpty(pVCpu, (a_iSt)) != VINF_SUCCESS) {