MEM(EA, 2) <- (RS)[XLEN-16:XLEN-1]
RA <- EA
+Description:
+
+Let the effective address (EA) be the sum (RA)+ D.
+RS[48:63] are stored into the halfword in storage
+addressed by EA.
+
+EA is placed into register RA.
+
+If RA=0, the instruction form is invalid.
+
Special Registers Altered:
None