added english language description for lwaupx instruction in the pifixedload.mdwm

diff --git a/openpower/isa/pifixedload.mdwn b/openpower/isa/pifixedload.mdwn
index 748b098e274c73f3492c3c9b612e424b1716a19e..a5cbab803d63fa7e527cd942db2efc0d46aa7a6c 100644 (file)
--- a/openpower/isa/pifixedload.mdwn
+++ b/openpower/isa/pifixedload.mdwn
@@ -228,6 +228,15 @@ Pseudo-code:
     RT <- EXTS(MEM(EA, 4))
     RA <- (RA) + (RB)
 
+Description:
+
+    Let the effective address (EA) be the register RA.
+    The word in storage addressed by EA is loaded into RT[32:63].RT[0:31] are filled with a copy of bit 0 of the loaded word.
+
+    The sum (RA) + (RB) is placed into register RA.
+
+    If RA=0 or RA=RT, the instruction form is invalid.
+
 Special Registers Altered:
 
     None