Changeset 105445 in vbox for trunk/src/VBox/VMM/testcase

Timestamp:

Jul 23, 2024 12:17:44 PM (9 months ago)

Author:

vboxsync

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

164103

Message:

VMM/IEM: Fold IEM_MC_MAYBE_RAISE_SSE_AVX_SIMD_FP_OR_UD_XCPT() into IEM_MC_CALL_SSE_AIMPL_X()/IEM_MC_CALL_AVX_AIMPL_X(), bugref:10652

The current way raising exceptions doesn't work as the IEM would raise an #XF/#UD if an exception is unmasked and the corresponding
exception status flag is set, even if the current instruction wouldn't generate that exception.
The Intel Architecture manual states that exception flags are sticky and need manual clearing through ldmxcsr/xrstor but an exception
is only generated from an internal set of flags for the current operation. In order to avoid introducing temporary MXCSR values increasing
the overhead for native emitters later on exception status calculation and raising is now done in the IEM_MC_CALL_SSE_AIMPL_X() and
IEM_MC_CALL_AVX_AIMPL_X() IEM microcode statements.

File:

• trunk/src/VBox/VMM/testcase/tstIEMCheckMc.cpp (modified) (2 diffs)

trunk/src/VBox/VMM/testcase/tstIEMCheckMc.cpp

@@ -629 +629 @@
 #define IEM_MC_MAYBE_RAISE_FSGSBASE_XCPT()              do { (void)fMcBegin; } while (0)
 #define IEM_MC_MAYBE_RAISE_NON_CANONICAL_ADDR_GP0(a_u64Addr) do { (void)fMcBegin; } while (0)
-#define IEM_MC_MAYBE_RAISE_SSE_AVX_SIMD_FP_OR_UD_XCPT() do { (void)fMcBegin; } while (0)
 
 #define CHK_VAR(a_Name)                                 do { RT_CONCAT(iVarCheck_,a_Name) = 1; } while (0)
@@ -1084 +1083 @@
 #define IEM_MC_ACTUALIZE_FPU_STATE_FOR_READ()   (void)fMcBegin; const int fFpuRead = 1, fSseRead = 1
 #define IEM_MC_ACTUALIZE_FPU_STATE_FOR_CHANGE() (void)fMcBegin; const int fFpuRead = 1, fFpuWrite = 1, fSseRead = 1, fSseWrite = 1
-#define IEM_MC_SSE_UPDATE_MXCSR(a_fMxcsr)                                                       do { (void)fSseWrite; (void)fMcBegin; } while (0)
 #define IEM_MC_PREPARE_SSE_USAGE()              (void)fMcBegin; const int fSseRead = 1, fSseWrite = 1, fSseHost = 1
 #define IEM_MC_ACTUALIZE_SSE_STATE_FOR_READ()   (void)fMcBegin; const int fSseRead = 1