Merge zizzer:/bk/newmem

into  zower.eecs.umich.edu:/eecshome/m5/newmem

src/arch/sparc/isa/formats/mem/util.isa:
src/arch/sparc/isa_traits.hh:
src/arch/sparc/system.cc:
    Hand Merge

--HG--
extra : convert_revision : d5e0c97caebb616493e2f642e915969d7028109c

1 files changed, 24 insertions, 0 deletions

diff --git a/src/arch/sparc/isa/base.isa b/src/arch/sparc/isa/base.isa
index b78511398..58a17f23e 100644
--- a/src/arch/sparc/isa/base.isa
+++ b/src/arch/sparc/isa/base.isa
@@ -416,3 +416,27 @@ output decoder {{
         }
 }};
 
+output exec {{
+    /// Check "FP enabled" machine status bit.  Called when executing any FP
+    /// instruction in full-system mode.
+    /// @retval Full-system mode: NoFault if FP is enabled, FpDisabled
+    /// if not.  Non-full-system mode: always returns NoFault.
+#if FULL_SYSTEM
+    inline Fault checkFpEnableFault(%(CPU_exec_context)s *xc)
+    {
+        Fault fault = NoFault;	// dummy... this ipr access should not fault
+        if (xc->readMiscRegWithEffect(MISCREG_PSTATE) & PSTATE::pef &&
+            xc->readMiscRegWithEffect(MISCREG_FPRS) & 0x4)
+            return NoFault;
+        else
+            return new FpDisabled;
+    }
+#else
+    inline Fault checkFpEnableFault(%(CPU_exec_context)s *xc)
+    {
+        return NoFault;
+    }
+#endif
+}};
+
+