From 9805e2294e532cc7df718b84cbcdd0d300ac861e Mon Sep 17 00:00:00 2001
From: Chris Demetriou <cgd@google.com>
Date: Mon, 11 Feb 2002 22:49:45 +0000
Subject: [PATCH] 2002-02-11  Chris Demetriou  <cgd@broadcom.com>

        * mips.igen (ADD, ADDI, DADDI, DSUB, SUB): Add comment
        indicating that ALU32_END or ALU64_END are there to check
        for overflow.
        (DADD): Likewise, but also remove previous comment about
        overflow checking.
---
 sim/mips/ChangeLog |  8 ++++++++
 sim/mips/mips.igen | 13 ++++++-------
 2 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/sim/mips/ChangeLog b/sim/mips/ChangeLog
index 548f1cc76b..e7d21dce91 100644
--- a/sim/mips/ChangeLog
+++ b/sim/mips/ChangeLog
@@ -1,3 +1,11 @@
+2002-02-11  Chris Demetriou  <cgd@broadcom.com>
+
+	* mips.igen (ADD, ADDI, DADDI, DSUB, SUB): Add comment
+	indicating that ALU32_END or ALU64_END are there to check
+	for overflow.
+	(DADD): Likewise, but also remove previous comment about
+	overflow checking.
+
 2002-02-10  Chris Demetriou  <cgd@broadcom.com>
 
 	* mips.igen (DDIV, DIV, DIVU, DMULT, DMULTU, DSLL, DSLL32,
diff --git a/sim/mips/mips.igen b/sim/mips/mips.igen
index 4511d17775..6576b7776b 100644
--- a/sim/mips/mips.igen
+++ b/sim/mips/mips.igen
@@ -237,7 +237,7 @@
   {
     ALU32_BEGIN (GPR[RS]);
     ALU32_ADD (GPR[RT]);
-    ALU32_END (GPR[RD]);
+    ALU32_END (GPR[RD]);   /* This checks for overflow.  */
   }
   TRACE_ALU_RESULT (GPR[RD]);
 }
@@ -255,7 +255,7 @@
   {
     ALU32_BEGIN (GPR[RS]);
     ALU32_ADD (EXTEND16 (IMMEDIATE));
-    ALU32_END (GPR[RT]);
+    ALU32_END (GPR[RT]);   /* This checks for overflow.  */
   }
   TRACE_ALU_RESULT (GPR[RT]);
 }
@@ -709,12 +709,11 @@
 *vr4100:
 *vr5000:
 {
-  /* this check's for overflow */
   TRACE_ALU_INPUT2 (GPR[RS], GPR[RT]);
   {
     ALU64_BEGIN (GPR[RS]);
     ALU64_ADD (GPR[RT]);
-    ALU64_END (GPR[RD]);
+    ALU64_END (GPR[RD]);   /* This checks for overflow.  */
   }
   TRACE_ALU_RESULT (GPR[RD]);
 }
@@ -732,7 +731,7 @@
   {
     ALU64_BEGIN (GPR[RS]);
     ALU64_ADD (EXTEND16 (IMMEDIATE));
-    ALU64_END (GPR[RT]);
+    ALU64_END (GPR[RT]);   /* This checks for overflow.  */
   }
   TRACE_ALU_RESULT (GPR[RT]);
 }
@@ -1181,7 +1180,7 @@
   {
     ALU64_BEGIN (GPR[RS]);
     ALU64_SUB (GPR[RT]);
-    ALU64_END (GPR[RD]);
+    ALU64_END (GPR[RD]);   /* This checks for overflow.  */
   }
   TRACE_ALU_RESULT (GPR[RD]);
 }
@@ -2210,7 +2209,7 @@
   {
     ALU32_BEGIN (GPR[RS]);
     ALU32_SUB (GPR[RT]);
-    ALU32_END (GPR[RD]);
+    ALU32_END (GPR[RD]);   /* This checks for overflow.  */
   }
   TRACE_ALU_RESULT (GPR[RD]);
 }