From: Gabe Black <gblack@eecs.umich.edu>
Date: Sun, 19 Apr 2009 11:55:58 +0000 (-0700)
Subject: X86: Implement the stul microop.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d90456a4868baa931ca089a471c2b9230830d848;p=gem5.git

X86: Implement the stul microop.
This microop does a store and unlocks the requested address. The RISC86
microop ISA doesn't seem to have an equivalent to this, so I'm guessing that
the store following an ldstl is automatically unlocking. We don't do it this
way for performance reasons since the behavior is the same.
---

diff --git a/src/arch/x86/isa/microops/ldstop.isa b/src/arch/x86/isa/microops/ldstop.isa
index 5df423ea9..f16a3b488 100644
--- a/src/arch/x86/isa/microops/ldstop.isa
+++ b/src/arch/x86/isa/microops/ldstop.isa
@@ -478,6 +478,8 @@ let {{
         microopClasses[name] = StoreOp
 
     defineMicroStoreOp('St', 'Mem = pick(Data, 2, dataSize);')
+    defineMicroStoreOp('Stul', 'Mem = pick(Data, 2, dataSize);',
+            mem_flags="Request::LOCKED")
     defineMicroStoreOp('Stfp', 'Mem = FpData.uqw;')
     defineMicroStoreOp('Stupd', 'Mem = pick(Data, 2, dataSize);',
             'Base = merge(Base, EA - SegBase, addressSize);',