Changeset 96725 in vbox for trunk

Timestamp:

Sep 14, 2022 7:50:19 AM (2 years ago)

Author:

vboxsync

Message:

VMM/IEM: Implement cvttsd2si instruction, bugref:9898 [fixes to the emulation, executed the wrong testcase, doh]

File:

• trunk/src/VBox/VMM/VMMAll/IEMAllAImplC.cpp (modified) (2 diffs)

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

@@ -16010 +16010 @@
 
     r64Src.u = *pu64Src;
-    uint32_t fDe = iemSsePrepareValueR64(&r64Src, pFpuState->MXCSR, &r64Src);
+    iemSsePrepareValueR64(&r64Src, pFpuState->MXCSR, &r64Src); /* The de-normal flag is not set. */
 
     softfloat_state_t SoftState = IEM_SOFTFLOAT_STATE_INITIALIZER_FROM_MXCSR(pFpuState->MXCSR);
-    *pi32Dst = f64_to_i32(iemFpSoftF64FromIprt(&r64Src), SoftState.roundingMode, true /*exact*/, &SoftState);
-    *pfMxcsr = pFpuState->MXCSR | (SoftState.exceptionFlags & X86_MXCSR_XCPT_FLAGS) | fDe;
+    *pi32Dst = f64_to_i32_r_minMag(iemFpSoftF64FromIprt(&r64Src), true /*exact*/, &SoftState);
+    *pfMxcsr = pFpuState->MXCSR | (SoftState.exceptionFlags & X86_MXCSR_XCPT_FLAGS);
 }
 
@@ -16023 +16023 @@
 
     r64Src.u = *pu64Src;
-    uint32_t fDe = iemSsePrepareValueR64(&r64Src, pFpuState->MXCSR, &r64Src);
+    iemSsePrepareValueR64(&r64Src, pFpuState->MXCSR, &r64Src); /* The de-normal flag is not set. */
 
     softfloat_state_t SoftState = IEM_SOFTFLOAT_STATE_INITIALIZER_FROM_MXCSR(pFpuState->MXCSR);
-    *pi64Dst = f64_to_i64(iemFpSoftF64FromIprt(&r64Src), SoftState.roundingMode, true /*exact*/, &SoftState);
-    *pfMxcsr = pFpuState->MXCSR | (SoftState.exceptionFlags & X86_MXCSR_XCPT_FLAGS) | fDe;
-}
-#endif
+    *pi64Dst = f64_to_i64_r_minMag(iemFpSoftF64FromIprt(&r64Src), true /*exact*/, &SoftState);
+    *pfMxcsr = pFpuState->MXCSR | (SoftState.exceptionFlags & X86_MXCSR_XCPT_FLAGS);
+}
+#endif