Unfortunately the page you found is an orphan created during an unfinished attempt to reorganize the documentation. The original (complete, though somewhat out-of-date) documentation is here: http://www.m5sim.org/ISA_description_system
In particular, the 'format' section is covered here: http://www.m5sim.org/The_M5_ISA_description_language#Specifying_instruction_formats Steve On Sun, Feb 1, 2015 at 4:37 PM, n26001482 via gem5-users < gem5-users@gem5.org> wrote: > Hi, all. > > Here's the code in arm.isa file > > --------------------------------------------------------------------- > > decode COND_CODE { > 0xF: ArmUnconditional::armUnconditional(); > default: decode ENCODING { > format DataOp { > 0x0: decode SEVEN_AND_FOUR { > 1: decode MISC_OPCODE { > 0x9: decode PREPOST { > 0: ArmMultAndMultAcc::armMultAndMultAcc(); > 1: ArmSyncMem::armSyncMem(); > } > 0xb, 0xd, 0xf: AddrMode3::addrMode3(); > } > ... > ... > ... > > --------------------------------------------------------------------- > > In line 4, what's the key word "format" ? > > I've studied the site, ISA Parser, http://www.m5sim.org/ISA_Parser , but > get no idea about it. > I know "decode COND_CODE" in line 1 is like a switch case and the contents > between the braces > are the code will be generated. > > Does anyone tell me what is format? Any hint will be appreciated. > > Best > M.Y. Lin > > > > > _______________________________________________ > gem5-users mailing list > gem5-users@gem5.org > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >
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