Displaying 3 results from an estimated 3 matches for "constfpreg".
2005 Jul 25
1
[LLVMdev] How to partition registers into different RegisterClass?
...ile, and not make the constant register allocatable (e.g. see
> X86RegisterInfo.td, and note how the register classes include EBP and ESP,
> but do not register allocate them (through the definition of
> allocation_order_end()).
>
> -Chris
Hope I understand you correctly:
def C0 : ConstFpReg<0, "c0">;
...
def C200 : ConstFpReg<199, "c200">;
def I0 : ConstIntReg<0, "i0">;
...
def I100 : ConstIntReg<100, "i100">;
def R0 : TempReg<0, "r0">;
def R32 : TempReg<31, "r32">;
def V0 : InputReg<...
2005 Jul 23
0
[LLVMdev] How to partition registers into different RegisterClass?
On Sat, 23 Jul 2005, Tzu-Chien Chiu wrote:
> 2005/7/23, Chris Lattner <sabre at nondot.org>:
>> What does a 'read only' register mean? Is it a constant (e.g. returns
>> 1.0)? Otherwise, how can it be a useful value?
>
> Yes, it's a constant register.
>
> Because the instruction cannot contain an immediate value, a constant
> value may be stored in
2005 Jul 23
3
[LLVMdev] How to partition registers into different RegisterClass?
2005/7/23, Chris Lattner <sabre at nondot.org>:
>
> What does a 'read only' register mean? Is it a constant (e.g. returns
> 1.0)? Otherwise, how can it be a useful value?
Yes, it's a constant register.
Because the instruction cannot contain an immediate value, a constant
value may be stored in a constant register, and it's defined _before_
the program starts by