X86: Implement the ldstl microop.

This microop does a load, checks that a store would succeed, and locks the
requested address.

diff --git a/src/arch/x86/isa/microops/ldstop.isa b/src/arch/x86/isa/microops/ldstop.isa
index 24ddd0b43ed6514678929eb4803a316f8b1070f5..5df423ea9770a1b130dc34775ae366edfa506acc 100644 (file)
--- a/src/arch/x86/isa/microops/ldstop.isa
+++ b/src/arch/x86/isa/microops/ldstop.isa
@@ -440,6 +440,8 @@ let {{
     defineMicroLoadOp('Ld', 'Data = merge(Data, Mem, dataSize);')
     defineMicroLoadOp('Ldst', 'Data = merge(Data, Mem, dataSize);',
             'X86ISA::StoreCheck')
+    defineMicroLoadOp('Ldstl', 'Data = merge(Data, Mem, dataSize);',
+            'X86ISA::StoreCheck | Request::LOCKED')
     defineMicroLoadOp('Ldfp', 'FpData.uqw = Mem;')
 
     def defineMicroStoreOp(mnemonic, code, \