ubsan: xstormy16: left shift of negative value

cpu/
	* xstormy16.cpu (f-rel12a): Avoid signed overflow.
opcodes/
	* xstormy16-ibld.c: Regenerate.

cpu/ChangeLog

@@ -1,3 +1,7 @@
+2019-12-16  Alan Modra  <amodra@gmail.com>
+
+	* xstormy16.cpu (f-rel12a): Avoid signed overflow.
+
 2019-12-11  Alan Modra  <amodra@gmail.com>
 
 	* epiphany.cpu (f-sdisp11): Don't sign extend with shifts.

cpu/xstormy16.cpu

@@ -393,7 +393,7 @@
   (length 11)
   (mode INT)
   (encode (value pc) (sra SI (sub SI value (add SI pc 2)) 1))
-  (decode (value pc) (add SI (sll value 1) (add SI pc 2)))
+  (decode (value pc) (add SI (mul value 2) (add SI pc 2)))
 )
 (dnop rel12a "12 bit relative address" () h-uint f-rel12a)
 

opcodes/ChangeLog

@@ -1,3 +1,7 @@
+2019-12-16  Alan Modra  <amodra@gmail.com>
+
+	* xstormy16-ibld.c: Regenerate.
+
 2019-12-16  Alan Modra  <amodra@gmail.com>
 
 	* score-dis.c (print_insn_score16): Move rpush/rpop imm field

opcodes/xstormy16-ibld.c

@@ -800,7 +800,7 @@ xstormy16_cgen_extract_operand (CGEN_CPU_DESC cd,
       {
         long value;
         length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED)|(1<<CGEN_IFLD_PCREL_ADDR), 0, 4, 11, 32, total_length, pc, & value);
-        value = ((((value) << (1))) + (((pc) + (2))));
+        value = ((((value) * (2))) + (((pc) + (2))));
         fields->f_rel12a = value;
       }
       break;