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-rw-r--r--src/arch/x86/isa/insts/control_transfer/xreturn.py16
1 files changed, 11 insertions, 5 deletions
diff --git a/src/arch/x86/isa/insts/control_transfer/xreturn.py b/src/arch/x86/isa/insts/control_transfer/xreturn.py
index aaffa2b92..1e8e0ba55 100644
--- a/src/arch/x86/isa/insts/control_transfer/xreturn.py
+++ b/src/arch/x86/isa/insts/control_transfer/xreturn.py
@@ -53,8 +53,14 @@
#
# Authors: Gabe Black
-microcode = ""
-#let {{
-# class RET(Inst):
-# "GenFault ${new UnimpInstFault}"
-#}};
+microcode = '''
+def macroop RET
+{
+ # Make the default data size of rets 64 bits in 64 bit mode
+ .adjust_env oszIn64Override
+
+ ld t1, ss, [0, t0, rsp]
+ addi rsp, rsp, dsz
+ wripi t1, 0
+};
+'''