added english language description for Add to Minus One Extended instruction

diff --git a/openpower/isa/fixedarith.mdwn b/openpower/isa/fixedarith.mdwn
index f745d3198a3dc6cb4aed9d691da6017038cf0fae..ee1800c424f7b4c3e48f457fb167c4b0c197cd5e 100644 (file)
--- a/openpower/isa/fixedarith.mdwn
+++ b/openpower/isa/fixedarith.mdwn
@@ -262,6 +262,11 @@ Pseudo-code:
 
     RT <- (RA) + CA - 1
 
+Description:
+
+       The sum (RA) + CA + 641 is placed into register RT.
+
+
 Special Registers Altered:
 
     CA CA32