ppc64: comment out insns that can't be tested with risu

ADDPCIS uses the program counter, which depends on where the image was
loaded. DARN is non-deterministic by definition, we can't compare the
results between executions.

ppc64.risu

@@ -87,8 +87,8 @@ ADDMEdo PPC64LE 011111 rt:5 ra:5 0000010111010101 \
 !constraints { $rt != 1 && $ra != 1 && $rt != 13 && $ra != 13; }
 
 # format:DX book:I page:69 v3.0 addpcis Add PC Immediate Shifted
-ADDPCIS PPC64LE 010011 rt:5 db:5 da:10 00010 dc:1 \
-!constraints { $rt != 1 && $rt != 13; }
+#ADDPCIS PPC64LE 010011 rt:5 db:5 da:10 00010 dc:1 \
+#!constraints { $rt != 1 && $rt != 13; }
 
 # format:XO book:I page:73 v:P1 SR addze Add to Zero Extended
 ADDZE PPC64LE 011111 rt:5 ra:5 0000000110010100 \
@@ -278,8 +278,8 @@ DADDQd PPC64LE 111111 frtp:5 frap:5 frbp:5 00000000101 \
 !constraints { $frtp % 2 == 0 && $frap % 2 == 0 && $frbp % 2 == 0; }
 
 # format:X book:I page:79 v3.0 darn Deliver A Random Number
-DARN PPC64LE 011111 rt:5 000 l:2 0000010111100110 \
-!constraints { $rt != 1 && $rt != 13 && $l != 3; }
+#DARN PPC64LE 011111 rt:5 000 l:2 0000010111100110 \
+#!constraints { $rt != 1 && $rt != 13 && $l != 3; }
 
 # format:X book:I page:217 v2.06 dcffix DFP Convert From Fixed
 DCFFIX PPC64LE 111011 frt:5 00000 frb:5 11001000100