Added English Language description for sth instruction

diff --git a/openpower/isa/fixedstore.mdwn b/openpower/isa/fixedstore.mdwn
index e18f254199fb7e19dc47a0910524436e0913c82b..7390a24be7c728bb66e072d02e2b1e9789525608 100644 (file)
--- a/openpower/isa/fixedstore.mdwn
+++ b/openpower/isa/fixedstore.mdwn
@@ -122,6 +122,12 @@ Pseudo-code:
     EA <- b + EXTS(D)
     MEM(EA, 2) <- (RS)[XLEN-16:XLEN-1]
 
+Description:
+
+Let the effective address (EA) be the sum (RA|0)+ D.
+RS[48:63] are stored into the halfword in storage
+addressed by EA.
+
 Special Registers Altered:
 
     None