removed isa argument from decoder plugin setup

riscv_isac/coverage.py

@@ -1059,7 +1059,7 @@ def compute(trace_file, test_name, cgf, parser_name, decoder_name, detailed, xle
     decoderclass = getattr(instructionObjectfile, "disassembler")
     decoder_pm.register(decoderclass())
     decoder = decoder_pm.hook
-    decoder.setup(arch="rv"+str(xlen),isa=cgf[cov_labels]['config'])
+    decoder.setup(arch="rv"+str(xlen))
 
     iterator = iter(parser.__iter__()[0])
 

riscv_isac/plugins/internaldecoder.py

@@ -406,9 +406,8 @@ def init_rvp_dictionary(self):
         self.rvp_dict_11[0x00003077] = 'bpick'
 
     @plugins.decoderHookImpl
-    def setup(self, arch,isa):
+    def setup(self, arch):
         self.arch = arch
-        self.isa = isa
 
     FIRST2_MASK = 0x00000003
     OPCODE_MASK = 0x0000007f
@@ -1211,10 +1210,6 @@ def arith_ops(self, instrObj):
                 instrObj.rs2 = rs2
                 instrObj.rd = rd
             elif funct7 == 0b0000100:
-# pack and zext.h have same opcode, func3, funct7 only diffrence is in rs2 value
-# for zext.h rs2 is always 0, if pack instruction is used with x0 as rs2
-# then cannot distinguish from each other, hence using isa to differentiate.
-# zext.h is part of Zbb, pack is part of Zbkb
                 instrObj.instr_name = 'pack'
                 instrObj.rs1 = rs1
                 instrObj.rs2 = rs2

riscv_isac/plugins/specification.py

@@ -5,7 +5,7 @@
 
 class DecoderSpec(object):
     @decoderHookSpec
-    def setup(self,arch,isa):
+    def setup(self,arch):
         pass
 
     @decoderHookSpec