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...RegisterClass<...>; def WriteOnlyRegClass : RegisterClass<...>; def MOV : BinaryInst<2, (ops GeneralPurposeRegClass :$dest, GeneralPurposeRegClass :$src), "mov $dest, $src">; There can be only one RegisterClass defined for each instruction operand, but actually the destition operand could be 'GeneralPurposeRegClass ' or 'WriteOnlyRegClass ', and the source operand can be 'ReadOnlyRegClass' or 'GeneralPurposeRegClass'. -- Tzu-Chien Chiu http://www.csie.nctu.edu.tw/~jwchiu/

...that I can easy define the > instruction? [snip] > def MOV : BinaryInst<2, (ops GeneralPurposeRegClass :$dest, > GeneralPurposeRegClass :$src), "mov $dest, $src">; > > There can be only one RegisterClass defined for each instruction > operand, but actually the destition operand could be > 'GeneralPurposeRegClass ' or 'WriteOnlyRegClass ', and the source > operand can be 'ReadOnlyRegClass' or 'GeneralPurposeRegClass'. Presumably, when you write your instruction selector, you know when you want to have a write-only vs. gener...

...t; instruction? > [snip] > > def MOV : BinaryInst<2, (ops GeneralPurposeRegClass :$dest, > > GeneralPurposeRegClass :$src), "mov $dest, $src">; > > > > There can be only one RegisterClass defined for each instruction > > operand, but actually the destition operand could be > > 'GeneralPurposeRegClass ' or 'WriteOnlyRegClass ', and the source > > operand can be 'ReadOnlyRegClass' or 'GeneralPurposeRegClass'. > > Presumably, when you write your instruction selector, you know when you > want to ha...

...;> [snip] >>> def MOV : BinaryInst<2, (ops GeneralPurposeRegClass :$dest, >>> GeneralPurposeRegClass :$src), "mov $dest, $src">; >>> >>> There can be only one RegisterClass defined for each instruction >>> operand, but actually the destition operand could be >>> 'GeneralPurposeRegClass ' or 'WriteOnlyRegClass ', and the source >>> operand can be 'ReadOnlyRegClass' or 'GeneralPurposeRegClass'. >> >> Presumably, when you write your instruction selector, you know when you &g...