ppcdisasm: fix frsp and add tests for it.

cpu/ppc/ppcdisasm.cpp

@@ -1687,8 +1687,12 @@ void opc_group63(PPCDisasmContext* ctx) {
     case 12: /* frsp */
         if (ra != 0)
             opc_illegal(ctx);
-        else
-            ctx->instr_str = my_sprintf("%-8s%d, r%d, r%d", "frsp", rs, rb);
+        else {
+            strcpy(opcode, "frsp");
+            if (rc_set)
+                strcat(opcode, ".");
+            ctx->instr_str = my_sprintf("%-8sf%d, f%d", opcode, rs, rb);
+        }
         break;
     case 14: /* fctiw */
         if (ra != 0)

cpu/ppc/test/ppcdisasmtest.csv

@@ -365,6 +365,8 @@
 0xFFF00100,0xFD600110,fnabs,f11,f0
 0xFFF00100,0xFD002034,frsqrte,f8,f4
 0xFFF00100,0x7FF957AE,stfiwx,f31,r25,r10
+0xFFF00100,0xFC40F818,frsp,f2,f31
+0xFFF00100,0xFC201019,frsp.,f1,f2
 
 # compare instructions
 0xFFF00100,0x7C15A000,cmpw,r21,r20