search for: arm_atomic_cmp_swap

Hi, I have reworked my previous example and got something which is accepted by tblgen: let isCall = 1, Defs = [R0, R1, R2, R3, R12, LR, D0, D1, D2, D3, D4, D5, D6, D7, CPSR] in { def ARM_ATOMIC_CMP_SWAP : ABXI<0b1011, (outs GPR:$dst), (ins i32imm:$ptr, i32imm:$old, i32imm:$new), "do_something", [(set GPR:$dst, (atomic_cmp_swap_32 globaladdr:$ptr, imm:$old, imm:$new))]>; } What I want to achieve first is that llc picks this definition when it...

Hi, I am missing atomic operations support for the ARM backend (see PR #3887) and started trying to implement them. Since this is the first time that I work on such stuff (and llvm) I am going to take the supposedly easy route and provide an implementation that will work on Linux systems. This involves calling a special function which the kernel handles itself. Details here:

...On Mar 26, 2009, at 5:41 PM, Robert Schuster wrote: > Hi, > I have reworked my previous example and got something which is > accepted > by tblgen: > > let isCall = 1, > Defs = [R0, R1, R2, R3, R12, LR, > D0, D1, D2, D3, D4, D5, D6, D7, CPSR] in { > > def ARM_ATOMIC_CMP_SWAP : ABXI<0b1011, (outs GPR:$dst), (ins > i32imm:$ptr, i32imm:$old, i32imm:$new), > "do_something", > [(set GPR:$dst, > (atomic_cmp_swap_32 globaladdr:$ptr, imm:$old, > imm:$new))]>; > } > > What I want to achieve first is tha...