Fix JX’s target.

Jump to where the register is pointing in RAM, not to the register.

README.md

@@ -16,8 +16,7 @@ Or download a pre-built release and unzip it to `Ghidra/Processors`.
 
 # Bugs
 
-* Some calculations are wrong, causing Ghidra to miscalculate a jump target.
-* Probably a lot of others in instructions I did not yet happen to encouter. Pull requests
+* Probably a lot in instructions I did not yet happen to encouter. Pull requests
   appreciated.
 
 # TODO

data/languages/xtensaInstructions.sinc

@@ -521,7 +521,7 @@ macro extract_bit(val, bit, result) {
 
 # JX - Uncoditional Jump Register, pg. 368.
 :jx as is op2 = 0 & op1 = 0 & ar = 0 & as & u2_6.7 = 0b10 & u2_4.5 = 0b10 & op0 = 0 {
-    goto as;
+    goto [as];
 }
 
 # L8UI - Load 8-bit Unsigned, pg. 369.