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f2s
2018 Jan 17
1
Opcodes with 32-bit pair vs 64-bit register
...ster on a 64-bit architecture? For example, the following instruction converts a double to a single. The source operand is a register of class "Pair64". Is there a way to define it such that the register class is defined at runtime when we know if it should be a 64-bit register class?
def FD2S_rr: RRX<0b00110,0,0,0, (outs Core32:$a), (ins Pair64:$b),
"FD2S\t$a,$b"),[(set f32:$a, (fpround f64:$b))]>; Example register classes:
def Core32: RegisterClass<"XYZ", [i32,f32], 32,
(add R0,R1,R2,R3,...
def Pair64: RegisterClass<"XY...