Added English Language description for stfsu instruction

diff --git a/openpower/isa/fpstore.mdwn b/openpower/isa/fpstore.mdwn
index 6103753a2e58afafc59df9a6f03d5b50f36d20d3..affb8e17a81759287b79b1aa9348ce9adece9c7b 100644 (file)
--- a/openpower/isa/fpstore.mdwn
+++ b/openpower/isa/fpstore.mdwn
@@ -60,6 +60,18 @@ Pseudo-code:
     MEM(EA, 4)<- SINGLE( (FRS) )
     RA <- EA
 
+Description:
+
+    Let the effective address (EA) be the sum (RA) +D.
+
+    The contents of register FRS are converted to single
+    format (see page 142) and stored into the word in stor-
+    age addressed by EA.
+
+    EA is placed into register RA.
+
+    If RA=0, the instruction form is invalid.
+
 Special Registers Altered:
 
     None