search for: mips16

Yes, you could have mips16 and fastcc. Mips16 just means that processor mode to execute that function is "mips16". So in a mips16 designated function, I will just emit mips16 instructions and in a "nomips16" function, just emit normal mips32 instructions. I tend to call this "mips32" normal m...

I ran into a case in Mips16 where I need two registers. The problem arises from the fact that SP is not a mips16 register. You can implicitly use it in load/store and, move it to/from a mips16 register and add small immediate values to it but that's it. It's not in general a problem for me because there are a bunch...

Is it possible to assign the value of subtarget features using more complex expressions with code as opposed to using the mechanism that tablegen affords. For example, if Mips16 or Micro Mips is not present, then I want the subfeature "standard encoding". If I can't do this, then it requires me to write a more complex expression for the "standard encoding" expresions. For mips , mips16 and micro mips are considered to be processor extenasions t...

...dlings new attribute implementation would allow me to do this but it is not ready yet. Maybe it's okay to just add them to the list of function attributes as I suggested. But in the end, someone has to approve the checkin. On 01/11/2013 07:35 AM, Reed Kotler wrote: > Yes, you could have mips16 and fastcc. > > Mips16 just means that processor mode to execute that function is "mips16". > So in a mips16 designated function, I will just emit mips16 instructions > and in a "nomips16" > function, just emit normal mips32 instructions. > > I tend to call...

What I am thinking of now is to just register the MIPS116 and MIPS32 DAGToDAGISel passes and then within run on machine function, I can just return if the current mode indicates that mips16 is needed for example, so the run on machine function for Mips32 would return immediately. On 03/27/2013 10:05 AM, Reed Kotler wrote: > I guess another way to do this is to just register both passes for > mips16 and mips32 and have them return immediately if it is not their > turn to run...

...he basic block. This will cause forward to fail. Maybe this is a bug in forward() On 02/05/2013 02:51 PM, Reed Kotler wrote: > Does not seem that anyone is using the more advanced features of > RegScavenger > > On 02/05/2013 01:09 PM, reed kotler wrote: >> I ran into a case in Mips16 where I need two registers. >> >> The problem arises from the fact that SP is not a mips16 register. >> You can implicitly use it in load/store and, move it to/from a mips16 >> register and add small immediate values to it but that's it. >> >> It's not in...

We are starting to look at the mips16 and micro mips ports. There are various design issues that people may have some good input on. Especially in how to structure the TD files and other optimizer issues. Mips16 is sort of like thumb and Micro Mips like thumb2 as far as I understand. Mips16 or Micro Mips can live inside of either M...

This seems to work okay. I register both the Mips16 and non Mips16 passes of the instruction selector and then those return false if they are not supposed to be running. Make-check at least passes in this case. So in principle turn on the dual mode now and debug whatever misc is left. For this I insert another pass before the mips16 and non mips...

Does not seem that anyone is using the more advanced features of RegScavenger On 02/05/2013 01:09 PM, reed kotler wrote: > I ran into a case in Mips16 where I need two registers. > > The problem arises from the fact that SP is not a mips16 register. > You can implicitly use it in load/store and, move it to/from a mips16 > register and add small immediate values to it but that's it. > > It's not in general a problem for m...

I'm working on the mips16. Mips16 is a mode of the Mips32 (or Mips64) processor. For the most part, it is a compressed form of the MIPS32 instruction set, though not all instructions are supported. Most of the same opcodes and formats are present though sometimes with some restriction. (The micro mips architecture is...

So the switching between mips16 and mips32 on a per function basis seems to basically be working except that asm printer has some kind of issue here. I'm debugging that now. I get this: lc: /home/rkotler/workspace/llvmpb6/include/llvm/MC/MCStreamer.h:224: void llvm::MCStreamer::SwitchSection(const llvm::MCSection*): Asser...

On Fri, Jan 20, 2012 at 1:59 PM, reed kotler <rkotler at mips.com> wrote: > We are starting to look at the mips16 and micro mips ports. > > There are various design issues that people may have some good input on. > Especially in how to structure the TD files and other optimizer issues. > > Mips16 is sort of like thumb and Micro Mips like thumb2 as far as I > understand. > > Mips16 or Mi...

...il. > > Maybe this is a bug in forward() > > > On 02/05/2013 02:51 PM, Reed Kotler wrote: >> Does not seem that anyone is using the more advanced features of >> RegScavenger >> >> On 02/05/2013 01:09 PM, reed kotler wrote: >>> I ran into a case in Mips16 where I need two registers. >>> >>> The problem arises from the fact that SP is not a mips16 register. >>> You can implicitly use it in load/store and, move it to/from a mips16 >>> register and add small immediate values to it but that's it. >>> &g...

...2013 07:45 PM, Eli Friedman wrote: > On Fri, Jan 4, 2013 at 6:28 PM, reed kotler <rkotler at mips.com> wrote: >> On 01/04/2013 06:08 PM, Eli Friedman wrote: >>> On Fri, Jan 4, 2013 at 4:08 PM, reed kotler <rkotler at mips.com> wrote: >>>> I'm working on mips16 hard float which at a first approximation is just >>>> soft >>>> float but calls different library routines. Those different library >>>> routines >>>> are just an implementation (in mips32 mode) of soft float using mips32 >>>> hardware in...

...6:28 PM, reed kotler <rkotler at mips.com> wrote: >>> >>> On 01/04/2013 06:08 PM, Eli Friedman wrote: >>>> >>>> On Fri, Jan 4, 2013 at 4:08 PM, reed kotler <rkotler at mips.com> wrote: >>>>> >>>>> I'm working on mips16 hard float which at a first approximation is just >>>>> soft >>>>> float but calls different library routines. Those different library >>>>> routines >>>>> are just an implementation (in mips32 mode) of soft float using mips32 >>>...

I'm working on mips16 hard float which at a first approximation is just soft float but calls different library routines. Those different library routines are just an implementation (in mips32 mode) of soft float using mips32 hardware instructions. This part is already done. (mips16 mode has no floating point instruc...

On 01/04/2013 06:08 PM, Eli Friedman wrote: > On Fri, Jan 4, 2013 at 4:08 PM, reed kotler <rkotler at mips.com> wrote: >> I'm working on mips16 hard float which at a first approximation is just soft >> float but calls different library routines. Those different library routines >> are just an implementation (in mips32 mode) of soft float using mips32 >> hardware instructions. This part is already done. (mips16 mode has no...

I'm implementing this ability to switch between mips16 and mips32 on a per function basis. One issue that I've run into is regarding the DAGToDAGIsel pass. We have a different subclass for mips16 and non mips16 ( conceivably later there could be a separate one for micromips). I need to run a different pass depending on whether it's mips16...

For target dependent function level attributes, do I need to actually add them to the enumeration in attributes.h? I have for example, mips16 and nomips16 as attributes. Or is this supposed to be done with cc <n>

...ng getMinimalPhysRegClass. Some target independent code is using it. It makes trouble for us and I would like to submit a patch to make it a virtual function so that I can override it and make it meaningful for Mips, as long as this method still exists. I want to add another register class for Mips16 and don't want to define a Mips16 set of registers because in reality there is no such thing; MIPS16 is an application extension that can exist for either Mips32 or Mips64 which uses a different instruction encoding. When I'm compiling for -mips23 -nomips16 I don't want the mips16...