From 6a543b51344ef8d511f2b67fa0d657a9a78dd169 Mon Sep 17 00:00:00 2001
From: Nilay Vaish <nilay@cs.wisc.edu>
Date: Mon, 27 Jan 2014 18:50:53 -0600
Subject: x86: implements  x87 add/sub instructions

---
 .../x86/isa/insts/x87/arithmetic/subtraction.py    | 59 +++++++++++++++++++++-
 1 file changed, 57 insertions(+), 2 deletions(-)

(limited to 'src/arch/x86/isa/insts/x87/arithmetic/subtraction.py')

diff --git a/src/arch/x86/isa/insts/x87/arithmetic/subtraction.py b/src/arch/x86/isa/insts/x87/arithmetic/subtraction.py
index e6098ff1f..77db1e470 100644
--- a/src/arch/x86/isa/insts/x87/arithmetic/subtraction.py
+++ b/src/arch/x86/isa/insts/x87/arithmetic/subtraction.py
@@ -36,8 +36,63 @@
 # Authors: Gabe Black
 
 microcode = '''
-# FSUB
-# FSUBP
+def macroop FSUB1_R
+{
+    subfp st(0), st(0), sti
+};
+
+
+def macroop FSUB1_M
+{
+    ldfp ufp1, seg, sib, disp
+    subfp st(0), st(0), ufp1
+};
+
+def macroop FSUB1_P
+{
+    rdip t7
+    ldfp ufp1, seg, riprel, disp
+    subfp st(0), st(0), ufp1
+};
+
+def macroop FSUB2_R
+{
+    subfp sti, sti, st(0)
+};
+
+def macroop FSUB2_M
+{
+    ldfp ufp1, seg, sib, disp
+    subfp st(0), st(0), ufp1
+};
+
+def macroop FSUB2_P
+{
+    rdip t7
+    ldfp ufp1, seg, riprel, disp
+    subfp st(0), st(0), ufp1
+};
+
+def macroop FSUBP
+{
+    subfp st(1), st(1), st(0), spm=1
+};
+
+def macroop FSUBP_R
+{
+    subfp sti, sti, st(0), spm=1
+};
+
+def macroop FSUBP_M
+{
+    fault "new UnimpInstFault"
+};
+
+def macroop FSUBP_P
+{
+   fault "new UnimpInstFault"
+};
+
 # FISUB
 # FSUBR
 # FSUBRP
-- 
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