From: Gabe Black <gblack@eecs.umich.edu>
Date: Thu, 19 Jul 2007 00:47:40 +0000 (-0700)
Subject: Implement near returns.
X-Git-Tag: m5_2.0_beta4~297^2~29
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=dbf361128a1e9940ada0af32d9d0d728d08b8943;p=gem5.git

Implement near returns.

--HG--
extra : convert_revision : 3d6e8a976d31cb016a4b78200716b0ece155137a
---

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
+};
+'''