From dad30582248b049a72dd3aa0350f19b1b8c456ee Mon Sep 17 00:00:00 2001
From: Gabe Black <gblack@eecs.umich.edu>
Date: Thu, 14 Jun 2007 20:52:24 +0000
Subject: Sign extend byte immediates as well. There might need to be a fancier
 system in place to handle this in the future.

--HG--
extra : convert_revision : 2c5bd719c770d9a93a57bd29782842f82384863d
---
 src/arch/x86/predecoder.cc | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/arch/x86/predecoder.cc b/src/arch/x86/predecoder.cc
index 72b60385b..3ed18aeb2 100644
--- a/src/arch/x86/predecoder.cc
+++ b/src/arch/x86/predecoder.cc
@@ -390,8 +390,15 @@ namespace X86ISA
             //Instructions which use true 64 bit immediates won't be
             //affected, and instructions that use true 32 bit immediates
             //won't notice.
-            if(immediateSize == 4)
+            switch(immediateSize)
+            {
+              case 4:
                 emi.immediate = sext<32>(emi.immediate);
+                break;
+              case 1:
+                emi.immediate = sext<8>(emi.immediate);
+            }
+
             DPRINTF(Predecoder, "Collected immediate %#x.\n",
                     emi.immediate);
             emiIsReady = true;
-- 
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