Changeset 61898 in vbox for trunk

Timestamp:

Jun 27, 2016 1:36:46 PM (9 years ago)

Author:

vboxsync

Message:

iemRegAddToRipAndClearRF: optimizations (64-bit code only). Save a byte sign extending enmCpuMode to 64-bit. Combine the adding and masking, avoid saving intermediate results.

File:

• trunk/src/VBox/VMM/VMMAll/IEMAll.cpp (modified) (1 diff)

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

@@ -5291 +5291 @@
     AssertCompile(IEMMODE_16BIT == 0 && IEMMODE_32BIT == 1 && IEMMODE_64BIT == 2);
     static uint64_t const s_aRipMasks[] = { UINT64_C(0xffff), UINT64_C(0xffffffff), UINT64_MAX };
-    Assert(pCtx->rip <= s_aRipMasks[pIemCpu->enmCpuMode]);
-    pCtx->rip += cbInstr;
-    pCtx->rip &= s_aRipMasks[pIemCpu->enmCpuMode];
+    Assert(pCtx->rip <= s_aRipMasks[(unsigned)pIemCpu->enmCpuMode]);
+    pCtx->rip = (pCtx->rip + cbInstr) & s_aRipMasks[(unsigned)pIemCpu->enmCpuMode];
 #else
     switch (pIemCpu->enmCpuMode)