x86: implement some of the x87 instructions

This patch implements ftan, fprem, fyl2x, fld* floating-point instructions.

2 files changed, 13 insertions, 2 deletions

diff --git a/src/arch/x86/isa/insts/x87/transcendental_functions/logarithmic_functions.py b/src/arch/x86/isa/insts/x87/transcendental_functions/logarithmic_functions.py
index 5be460232..1078c491f 100644
--- a/src/arch/x86/isa/insts/x87/transcendental_functions/logarithmic_functions.py
+++ b/src/arch/x86/isa/insts/x87/transcendental_functions/logarithmic_functions.py
@@ -38,6 +38,10 @@
 microcode = '''
 # F2XM1
 # FSCALE
-# FYL2X
+
+def macroop FYL2X {
+    yl2xfp st(1), st(0), st(1), spm=1
+};
+
 # FYL2XP1
 '''
diff --git a/src/arch/x86/isa/insts/x87/transcendental_functions/trigonometric_functions.py b/src/arch/x86/isa/insts/x87/transcendental_functions/trigonometric_functions.py
index ffdbcf150..cc2ae606b 100644
--- a/src/arch/x86/isa/insts/x87/transcendental_functions/trigonometric_functions.py
+++ b/src/arch/x86/isa/insts/x87/transcendental_functions/trigonometric_functions.py
@@ -1,4 +1,5 @@
 # Copyright (c) 2007 The Hewlett-Packard Development Company
+# Copyright (c) 2012-13 Mark D. Hill and David A. Wood
 # All rights reserved.
 #
 # The license below extends only to copyright in the software and shall
@@ -34,6 +35,7 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 # Authors: Gabe Black
+#          Nilay Vaish
 
 microcode = '''
 def macroop FSIN {
@@ -51,6 +53,11 @@ def macroop FSINCOS {
     movfp st(-1), ufp2, spm=-1
 };
 
-# FPTAN
+def macroop FPTAN {
+    tanfp st(0), st(0)
+    limm ufp1, "double(1)"
+    movfp st(-1), ufp1, spm=-1
+};
+
 # FPATAN
 '''