Added English Language description for stdu instruction

diff --git a/openpower/isa/fixedstore.mdwn b/openpower/isa/fixedstore.mdwn
index ff2586ed9fc72956fcb04515209c89fd5ec70375..3513b018eef1d071b253aefd205d86cf5292a762 100644 (file)
--- a/openpower/isa/fixedstore.mdwn
+++ b/openpower/isa/fixedstore.mdwn
@@ -362,6 +362,16 @@ Pseudo-code:
     MEM(EA, 8) <- (RS)
     RA <- EA
 
+Description:
+
+    Let the effective address (EA) be the sum
+    (RA)+ (DS||0b00). (RS) is stored into the doubleword in
+    storage addressed by EA.
+
+    EA is placed into register RA.
+
+    If RA=0, the instruction form is invalid.
+
 Special Registers Altered:
 
     None