From 266a2f24bd5825d415b9624db11699cf477dd6f9 Mon Sep 17 00:00:00 2001
From: Andrew Waterman <waterman@cs.berkeley.edu>
Date: Mon, 12 Sep 2016 16:50:08 -0700
Subject: [PATCH] Disable Mul early out by default if XLen == 32

With a default unroll of 8, it doesn't help performance, but costs area.
---
 src/main/scala/coreplex/Configs.scala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/scala/coreplex/Configs.scala b/src/main/scala/coreplex/Configs.scala
index 129df866..8fc63706 100644
--- a/src/main/scala/coreplex/Configs.scala
+++ b/src/main/scala/coreplex/Configs.scala
@@ -125,7 +125,7 @@ class BaseCoreplexConfig extends Config (
       case FastLoadByte => false
       case XLen => 64
       case FPUKey => Some(FPUConfig())
-      case MulDivKey => Some(MulDivConfig(mulUnroll = 8, mulEarlyOut = true, divEarlyOut = true))
+      case MulDivKey => Some(MulDivConfig(mulUnroll = 8, mulEarlyOut = (site(XLen) > 32), divEarlyOut = true))
       case UseAtomics => true
       case UseCompressed => true
       case DMKey => new DefaultDebugModuleConfig(site(NTiles), site(XLen))