From: Gabe Black <gblack@eecs.umich.edu>
Date: Wed, 5 Sep 2007 06:42:55 +0000 (-0700)
Subject: X86: Make the movfp microop use FloatRegBits instead of FloatRegs.
X-Git-Tag: m5_2.0_beta4~124
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=6c689a3b4b3991342200bb2a433fdf7fbd76b4fc;p=gem5.git

X86: Make the movfp microop use FloatRegBits instead of FloatRegs.
This fixes a problem where interpreting arbitrary bits as floating point would
change what the value was. These values are legitimate because the fp
registers could be used to move around arbitrary data.

--HG--
extra : convert_revision : f1d7159ba137702b5722cc7c1b64ed7dd06c21de
---

diff --git a/src/arch/x86/isa/microops/regop.isa b/src/arch/x86/isa/microops/regop.isa
index 1d9299ff3..589113ba3 100644
--- a/src/arch/x86/isa/microops/regop.isa
+++ b/src/arch/x86/isa/microops/regop.isa
@@ -489,8 +489,8 @@ let {{
         else_code = 'DestReg=DestReg;'
 
     class Movfp(CondRegOp):
-        code = 'FpDestReg = FpSrcReg2'
-        else_code = 'FpDestReg = FpDestReg;'
+        code = 'FpDestReg.uqw = FpSrcReg2.uqw;'
+        else_code = 'FpDestReg.uqw = FpDestReg.uqw;'
 
     # Shift instructions