search for: format_predf

...is used to access appropriate field within RelHexagon Class. def Format_prev : IFormat<0>; // previous form def Format_rr : IFormat<1>; // register register def Format_ri : IFormat<2>; // register immediate def Format_predt : IFormat<3>; // pred true def Format_predf : IFormat<4>; // pred false 4) Prototype relationship model for a simple 'add' instruction with 6 variants: /---- if (p0) R1 = add(R2, R3) / (Predicate true) Add register register - R1 =...

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 :

On Aug 16, 2012, at 1:39 PM, Jyotsna Verma <jverma at codeaurora.org> wrote: > Hi Everyone, > > After some more thoughts to the Jacob's suggestion of using multiclasses for > Opcode mapping, this is what I have come up with. Please take a look at the > design below and let me know if you have any suggestions/questions. Hi Jyotsna, You are on to something here, but you

...We do have different type of relationships between instructions. I define multiple IFormat objects one per relationship which finally translates into a unique column into the mapping table. def Format_rr : IFormat<1>; def Format_ri : IFormat<2>; def Format_predt : IFormat<3>; def Format_predf : IFormat<4>; Addrr : { Addrr, Addri, Addrr_pt, Addrr_pf, .. , ..} Addri : { Addrr, Addri, Addri_pt, Addri_pf,.. > Do something like this: > > def getPredicatedOpcode : InstrMapping { > // Only include instructions form the PredRel class. > let FilterClass = "PredRe...