Remove P, Zbpbo, Zpn, and Zpsfoperand from ISA parser

disasm/isa_parser.cc

@@ -70,10 +70,6 @@ isa_parser_t::isa_parser_t(const char* str, const char *priv)
     }
 
     switch (*p) {
-      case 'p': extension_table[EXT_ZBPBO] = true;
-                extension_table[EXT_ZPN] = true;
-                extension_table[EXT_ZPSFOPERAND] = true;
-                extension_table[EXT_ZMMUL] = true; break;
       case 'v': // even rv32iv implies double float
       case 'q': extension_table['D'] = true;
                 // Fall through
@@ -390,16 +386,6 @@ isa_parser_t::isa_parser_t(const char* str, const char *priv)
     bad_isa_string(str, "'Zabha' extension requires either the 'A' or the 'Zaamo' extension");
   }
 
-  // Zpn conflicts with Zvknha/Zvknhb in both rv32 and rv64
-  if (extension_table[EXT_ZPN] && (extension_table[EXT_ZVKNHA] || extension_table[EXT_ZVKNHB])) {
-    bad_isa_string(str, "'Zvkna' and 'Zvknhb' extensions are incompatible with 'Zpn' extension");
-  }
-  // In rv64 only, Zpn (rv64_zpn) conflicts with Zvkg/Zvkned/Zvksh
-  if (max_xlen == 64 && extension_table[EXT_ZPN] &&
-      (extension_table[EXT_ZVKG] || extension_table[EXT_ZVKNED] || extension_table[EXT_ZVKSH])) {
-    bad_isa_string(str, "'Zvkg', 'Zvkned', and 'Zvksh' extensions are incompatible with 'Zpn' extension in rv64");
-  }
-
   // When SSE is 0, Zicfiss behavior is defined by Zicmop
   if (extension_table[EXT_ZICFISS] && !extension_table[EXT_ZIMOP]) {
     bad_isa_string(str, "'Zicfiss' extension requires 'Zimop' extension");