search for: relationmap

...erested in mapping relations, need to define a // class of its own as a subclass of 'Relations'. class IFormat<bits<4> value> { // Used to define basic instruction formats, Ex: register-register, register-immediate bits<4> Value = value; } // class RelationMap is actually used to related instructions with each other. class RelationMap<IFormat pFormat, IFormat iFormat, list<string> ancestors = [] > { IFormat ParentFormat = pFormat; IFormat InstrFormat = iFormat; list <string> Ancestors = ancestors; } 2) Include some basic setup i...

On Aug 1, 2012, at 1:53 PM, Jyotsna Verma <jverma at codeaurora.org> wrote: > > Currently, we rely on switch tables to transform between formats. However, > we would like to have a different mechanism to represent these relationships > instead of switch tables. I am thinking of modeling these relations in > HexagonInstrInfo.td file and use TableGen to generate a table with

Hi, I'm looking for some suggestions on a problem related to the Hexagon backend. Hexagon architecture allows instructions in various formats. For example, we have 3 variations of the add instruction as defined below: ADDrr : r1 = add(r2, r3) --> add 2 32-bit registers ADDrr_p : if(p0) r1 = add(r2, r3) --> predicated version of ADDrr instruction, executed when p0 is true ADDrr_np :

...y , PredSense=true, PredSense=false { ADD , ADDtrue, ADDfalse, // BaseOpcode="ADD" { SUB , SUBtrue, SUBfalse, // BaseOpcode="SUB" … > 5) We need some changes in the TGParser.cpp so that it can use the > information specified > through the RelationMap and populate relevant fields in the RelHexagon > class. The tablegen parser is definitely not the right place to implement this. /jakob

...PredSense=false > { ADD , ADDtrue, ADDfalse, // BaseOpcode="ADD" > { SUB , SUBtrue, SUBfalse, // BaseOpcode="SUB" > > > 5) We need some changes in the TGParser.cpp so that it can use the > > information specified through the RelationMap and populate relevant > > fields in the RelHexagon class. > > The tablegen parser is definitely not the right place to implement this. I didn't want to modify the tablegen parser either. But, I couldn't think of a way around it. Once instructions are expended by the TableGen p...