decoder.isa revision 6076 
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54// Authors: Gabe Black
55
56////////////////////////////////////////////////////////////////////
57//
58// The actual decoder specification
59//
60
61decode OPCODE_NUM default Unknown::unknown()
62{
63    0x0: M5InternalError::error(
64        {{"Saw an ExtMachInst with zero opcode bytes!"}});
65    //1 byte opcodes
66    ##include "one_byte_opcodes.isa"
67    //2 byte opcodes
68    ##include "two_byte_opcodes.isa"
69    //3 byte opcodes
70    0x3: decode OPCODE_PREFIXA {
71        0xF0: decode OPCODE_PREFIXB {
72            //We don't handle these properly in the predecoder yet, so there's
73            //no reason to implement them for now.
74            0x38: decode OPCODE_OP {
75                default: FailUnimpl::sseThreeEight();
76            }
77            0x3A: decode OPCODE_OP {
78                default: FailUnimpl::sseThreeA();
79            }
80            0xF0: decode OPCODE_OP {
81                default: FailUnimpl::threednow();
82            }
83            default: M5InternalError::error(
84                {{"Unexpected second opcode byte in three byte opcode!"}});
85        }
86        default: M5InternalError::error(
87            {{"Unexpected first opcode byte in three byte opcode!"}});
88    }
89}
90