From 9d04510869fe66d59a168660925a8387c0fba1b8 Mon Sep 17 00:00:00 2001
From: Ali Saidi <saidi@eecs.umich.edu>
Date: Wed, 10 Jan 2007 22:19:13 -0500
Subject: bug fixes to get us to 145m instructions

src/arch/sparc/intregfile.cc:
    some checks to make sure that the cwp and global register flattening stuff is working. These things have caught a couple of bugs so I think it would be good to keep them around at least for now
src/arch/sparc/isa/decoder.isa:
    fix smul instruction to write Y correctly
src/arch/sparc/miscregfile.cc:
    legion always returns du and dl set, so we need to emulate that for now at least

--HG--
extra : convert_revision : 82f9276340888f1e43071c69504486efdcfdb3a8
---
 src/arch/sparc/intregfile.cc   | 7 +++++++
 src/arch/sparc/isa/decoder.isa | 4 ++--
 src/arch/sparc/miscregfile.cc  | 5 +----
 3 files changed, 10 insertions(+), 6 deletions(-)

(limited to 'src/arch/sparc')

diff --git a/src/arch/sparc/intregfile.cc b/src/arch/sparc/intregfile.cc
index 0a8ac055f..60856d3fa 100644
--- a/src/arch/sparc/intregfile.cc
+++ b/src/arch/sparc/intregfile.cc
@@ -111,6 +111,8 @@ void IntRegFile::setReg(int intReg, const IntReg &val)
 void IntRegFile::setCWP(int cwp)
 {
     int index = ((NWindows - cwp) % NWindows) * 2;
+    if (index < 0)
+        panic("Index less than 0. cwp=%d nwin=%d\n", cwp, NWindows);
     offset[Outputs] = FrameOffset + (index * RegsPerFrame);
     offset[Locals] = FrameOffset + ((index+1) * RegsPerFrame);
     offset[Inputs] = FrameOffset +
@@ -128,6 +130,11 @@ void IntRegFile::setGlobals(int gl)
 
     regView[Globals] = regGlobals[gl];
     offset[Globals] = RegGlobalOffset + gl * RegsPerFrame;
+
+    if (regView[Globals] == regView[Inputs] ||
+        regView[Globals] == regView[Locals] ||
+        regView[Globals] == regView[Outputs] )
+        panic("Two register arrays set to the same thing!\n");
 }
 
 void IntRegFile::serialize(std::ostream &os)
diff --git a/src/arch/sparc/isa/decoder.isa b/src/arch/sparc/isa/decoder.isa
index e2bebd987..2e1344a8f 100644
--- a/src/arch/sparc/isa/decoder.isa
+++ b/src/arch/sparc/isa/decoder.isa
@@ -1,4 +1,4 @@
-// Copyright (c) 2006 The Regents of The University of Michigan
+// Copyright (c) 2006-2007 The Regents of The University of Michigan
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -184,7 +184,7 @@ decode OP default Unknown::unknown()
             }});
             0x0B: smul({{
                 Rd.sdw = Rs1.sdw<31:0> * Rs2_or_imm13<31:0>;
-                Y = Rd.sdw;
+                Y = Rd.sdw<63:32>;
             }});
             0x0C: subc({{Rd.sdw = Rs1.sdw + (~Rs2_or_imm13) + 1 - Ccr<0:0>}});
             0x0D: udivx({{
diff --git a/src/arch/sparc/miscregfile.cc b/src/arch/sparc/miscregfile.cc
index 2dde5afd5..50f510289 100644
--- a/src/arch/sparc/miscregfile.cc
+++ b/src/arch/sparc/miscregfile.cc
@@ -327,10 +327,7 @@ MiscReg MiscRegFile::readRegWithEffect(int miscReg, ThreadContext * tc)
                mbits(tick,63,63);
       case MISCREG_FPRS:
         // in legion if fp is enabled du and dl are set
-        if (fprs & 0x4)
-            return 0x7;
-        else
-            return 0;
+        return fprs | 0x3;
       case MISCREG_PCR:
       case MISCREG_PIC:
         panic("Performance Instrumentation not impl\n");
-- 
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