search for: generalpurposerc

...re floating point registers, and the others are integer registers. I typedef two packed classes: [4 x float] and [4 x int], and add an enum 'packed' to MVT::ValueType (ValuesTypes.h). I declared all 'RegisterClass'es to be 'packed' (first argument of RegisterClass): def GeneralPurposeRC : RegisterClass<packed, 128, [R0, R1]>; def INT_ReadOnlyRC : RegisterClass<packed, 128, [I0, I1]>; def FP_ReadOnlyRC : RegisterClass<packed, 128, [F0, F1]>; def MOVgg : BinaryInst<0x51, ( ops GeneralPurposeRC :$dest, ope GeneralPurposeRC :$src), "mov $dest...

...estination register // of any instruction hereafter. %r1 = add %Vec4 v1, c1 %r2 = mul %Vec4 v1, c2 %o1 = mul %Vec4 r2, v2 // write the output register 'o1' I planed to partition the register into different RegisterClass: input, output, general purpose, constant, etc. def GeneralPurposeRC : RegisterClass<packed, 128, [R0, R1]>; def InputRC : RegisterClass<packed, 128, [V0, V1]>; def ConstantRC : RegisterClass<packed, 128, [C0, C1]>; def ADDgg : BinaryInst<0x51, ( ops GeneralPurposeRC :$dest, ope GeneralPurposeRC :$src), "add $dest, $src"&gt...

On Fri, Jul 22, 2005 at 10:29:38AM +0800, Tzu-Chien Chiu wrote: > I' have three set of registers - read-only regs, general purpose regs > (read and write), and write-only regs. How should I partition them > into different RegisterClasses so that I can easy define the > instruction? [snip] > def MOV : BinaryInst<2, (ops GeneralPurposeRegClass :$dest, >

Hi, everyone. I' have three set of registers - read-only regs, general purpose regs (read and write), and write-only regs. How should I partition them into different RegisterClasses so that I can easy define the instruction? All RegisterClasses must be mutally exclusive. That is, a register can only be in a RegisterClass. Otherwise TableGen will raise an error message. def

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

2005/7/23, 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

...the register allocator. The regalloc will eliminate the virtual registers, assigning physical GPRs. This is what the 'allocation order' is to cover. > I planed to partition the register into different RegisterClass: > input, output, general purpose, constant, etc. > > def GeneralPurposeRC : RegisterClass<packed, 128, [R0, R1]>; > def InputRC : RegisterClass<packed, 128, [V0, V1]>; > def ConstantRC : RegisterClass<packed, 128, [C0, C1]>; The way you want to partition these is based on how the instruction set works. If there is a single 'add' instr...

...rs are integer > registers. > > I typedef two packed classes: [4 x float] and [4 x int], and add an > enum 'packed' to MVT::ValueType (ValuesTypes.h). > > I declared all 'RegisterClass'es to be 'packed' (first argument of > RegisterClass): > > def GeneralPurposeRC : RegisterClass<packed, 128, [R0, R1]>; > def INT_ReadOnlyRC : RegisterClass<packed, 128, [I0, I1]>; > def FP_ReadOnlyRC : RegisterClass<packed, 128, [F0, F1]>; ... > In the instruction selector, SDOperand::getValueType() always returns > 'MVT::packed' for...