Displaying 13 results from an estimated 13 matches for "fsr0".
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csr0
2008 Oct 15
3
[LLVMdev] INSERT_SUBREG node.
...>
it is, though we have a workaround.
We have 16-bit registers class and want to set both the lo and high
parts using INSERT_SUBREG.
The workaround is to declare the same SubRegClass twice while declaring
the SuperRegisterClass. i.e.
def FSR16: RegisterClass <"PIC16", [i16], 8, [FSR0, FSR1]> {
let SubRegClassList = [FSR8, FSR8]; // HERE.
}
SubRegSet : <1, [FSR0, FSR1], [FSR0L, FSR0H]>;
SubRegSet : <2, [FSR0, FSR1], [FSR0H, FSR0L]>;
I think the fundamental problem we have there is that we are using
SubIdx for both purposes: 1. to enumerate over subregister...
2008 Oct 20
2
[LLVMdev] INSERT_SUBREG node.
...INSERT_SUBREG.
> > > >
> > > > The workaround is to declare the same SubRegClass twice while
> > > > declaring
> > > > the SuperRegisterClass. i.e.
> > > >
> > > > def FSR16: RegisterClass <"PIC16", [i16], 8, [FSR0, FSR1]> {
> > > > let SubRegClassList = [FSR8, FSR8]; // HERE.
> > > > }
> > >
> > > This is a bug, probably in tablegen. Unfortunately I don't have
> > > the
> > > time to fix it. But please file a bug about this. Hopefully
&g...
2008 Oct 18
2
[LLVMdev] INSERT_SUBREG node.
...ass and want to set both the lo and high
> > parts using INSERT_SUBREG.
> >
> > The workaround is to declare the same SubRegClass twice while
> > declaring
> > the SuperRegisterClass. i.e.
> >
> > def FSR16: RegisterClass <"PIC16", [i16], 8, [FSR0, FSR1]> {
> > let SubRegClassList = [FSR8, FSR8]; // HERE.
> > }
>
> This is a bug, probably in tablegen. Unfortunately I don't have the
> time to fix it. But please file a bug about this. Hopefully someone
> will fix it soon.
>
> Thanks,
>
> Eva...
2008 Oct 16
0
[LLVMdev] INSERT_SUBREG node.
...t;
> We have 16-bit registers class and want to set both the lo and high
> parts using INSERT_SUBREG.
>
> The workaround is to declare the same SubRegClass twice while
> declaring
> the SuperRegisterClass. i.e.
>
> def FSR16: RegisterClass <"PIC16", [i16], 8, [FSR0, FSR1]> {
> let SubRegClassList = [FSR8, FSR8]; // HERE.
> }
This is a bug, probably in tablegen. Unfortunately I don't have the
time to fix it. But please file a bug about this. Hopefully someone
will fix it soon.
Thanks,
Evan
>
>
> SubRegSet : <1, [FSR0, FSR1],...
2008 Oct 20
0
[LLVMdev] INSERT_SUBREG node.
...both the lo and high
>>> parts using INSERT_SUBREG.
>>>
>>> The workaround is to declare the same SubRegClass twice while
>>> declaring
>>> the SuperRegisterClass. i.e.
>>>
>>> def FSR16: RegisterClass <"PIC16", [i16], 8, [FSR0, FSR1]> {
>>> let SubRegClassList = [FSR8, FSR8]; // HERE.
>>> }
>>
>> This is a bug, probably in tablegen. Unfortunately I don't have the
>> time to fix it. But please file a bug about this. Hopefully someone
>> will fix it soon.
>>
>>...
2008 Oct 13
2
[LLVMdev] INSERT_SUBREG node.
...lse?
>
>
> Suppose you want to use a pair of i8 v1, v2 to create a i16 v3. The
> way to do it is:
>
>
> v4 = insert_subreg implicit_def, v1, 0
> v3 = insert_subreg v4, v2, 1
>
>
> Evan
>
This is how my register classes look like:
def FSR0L : Register<"FSR0L">;
def FSR0H : Register<"FSR0H">;
def FSR1L : Register<"FSR1L">;
def FSR1H : Register<"FSR1H">;
def FSR0 : RegisterWithSubRegs<"FSR0", [FSR0H, FSR0L]>;
def FSR1 : RegisterWithSubRegs<&qu...
2008 Oct 15
2
[LLVMdev] INSERT_SUBREG node.
...do it is:
> >>
> >>
> >> v4 = insert_subreg implicit_def, v1, 0
> >> v3 = insert_subreg v4, v2, 1
> >>
> >>
> >> Evan
> >>
> >
> > This is how my register classes look like:
> >
> > def FSR0L : Register<"FSR0L">;
> > def FSR0H : Register<"FSR0H">;
> > def FSR1L : Register<"FSR1L">;
> > def FSR1H : Register<"FSR1H">;
> >
> > def FSR0 : RegisterWithSubRegs<"FSR0", [FSR0H, FSR0L]...
2008 Oct 15
0
[LLVMdev] INSERT_SUBREG node.
...;>>
>>>> v4 = insert_subreg implicit_def, v1, 0
>>>> v3 = insert_subreg v4, v2, 1
>>>>
>>>>
>>>> Evan
>>>>
>>>
>>> This is how my register classes look like:
>>>
>>> def FSR0L : Register<"FSR0L">;
>>> def FSR0H : Register<"FSR0H">;
>>> def FSR1L : Register<"FSR1L">;
>>> def FSR1H : Register<"FSR1H">;
>>>
>>> def FSR0 : RegisterWithSubRegs<"FSR0", [FS...
2008 Oct 20
0
[LLVMdev] INSERT_SUBREG node.
On Oct 20, 2008, at 7:10 AM, sanjiv gupta wrote:
>>>
>>> PR2916 filed.
>>> Though I did not quite understand why this could be a tablegen bug?
>>
>>
>> Based on your comments. :-) It should be possible to specify two FSR0
>> sub-registers (FSR0L, FSR0H of the same register class FSR8) with the
>> workaround you described:
>>
>>
>> def FSR16: RegisterClass <"PIC16", [i16], 8, [FSR0, FSR1]> {
>> let SubRegClassList = [FSR8, FSR8]; // HERE.
>> }
>>
>...
2008 Oct 14
0
[LLVMdev] INSERT_SUBREG node.
...a pair of i8 v1, v2 to create a i16 v3. The
>> way to do it is:
>>
>>
>> v4 = insert_subreg implicit_def, v1, 0
>> v3 = insert_subreg v4, v2, 1
>>
>>
>> Evan
>>
>
> This is how my register classes look like:
>
> def FSR0L : Register<"FSR0L">;
> def FSR0H : Register<"FSR0H">;
> def FSR1L : Register<"FSR1L">;
> def FSR1H : Register<"FSR1H">;
>
> def FSR0 : RegisterWithSubRegs<"FSR0", [FSR0H, FSR0L]>;
> def FSR1 : Re...
2008 Oct 20
1
[LLVMdev] INSERT_SUBREG node.
...; On Oct 20, 2008, at 7:10 AM, sanjiv gupta wrote:
>
> >>>
> >>> PR2916 filed.
> >>> Though I did not quite understand why this could be a tablegen bug?
> >>
> >>
> >> Based on your comments. :-) It should be possible to specify two FSR0
> >> sub-registers (FSR0L, FSR0H of the same register class FSR8) with the
> >> workaround you described:
> >>
> >>
> >> def FSR16: RegisterClass <"PIC16", [i16], 8, [FSR0, FSR1]> {
> >> let SubRegClassList = [FSR8, FSR8]; // H...
2008 Oct 02
0
[LLVMdev] INSERT_SUBREG node.
On Oct 2, 2008, at 11:02 AM, Sanjiv.Gupta at microchip.com wrote:
> What’s the value produced by an INSERT_SUBREG node? Is it a chain?
No, insert_subreg returns a value:
v1 = insert_subreg v2, v3, idx
v1 and v2 will have the same type, e.g. i16, and v3 must have a sub-
register type, e.g. i8.
> Can I use to set a superreg of i16 type with two i8 values, and use
> the supperreg as
2008 Oct 02
2
[LLVMdev] INSERT_SUBREG node.
What's the value produced by an INSERT_SUBREG node? Is it a chain?
Can I use to set a superreg of i16 type with two i8 values, and use the
supperreg as an operand somewhere else?
- Sanjiv
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