1 //===-- AMDGPUInstrInfo.td - AMDGPU DAG nodes --------------*- tablegen -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file contains DAG node defintions for the AMDGPU target. 11 // 12 //===----------------------------------------------------------------------===// 13 14 //===----------------------------------------------------------------------===// 15 // AMDGPU DAG Profiles 16 //===----------------------------------------------------------------------===// 17 18 def AMDGPUDTIntTernaryOp : SDTypeProfile<1, 3, [ 19 SDTCisSameAs<0, 1>, SDTCisSameAs<0, 2>, SDTCisInt<0>, SDTCisInt<3> 20 ]>; 21 22 //===----------------------------------------------------------------------===// 23 // AMDGPU DAG Nodes 24 // 25 26 // out = ((a << 32) | b) >> c) 27 // 28 // Can be used to optimize rtol: 29 // rotl(a, b) = bitalign(a, a, 32 - b) 30 def AMDGPUbitalign : SDNode<"AMDGPUISD::BITALIGN", AMDGPUDTIntTernaryOp>; 31 32 // out = a - floor(a) 33 def AMDGPUfract : SDNode<"AMDGPUISD::FRACT", SDTFPUnaryOp>; 34 35 // out = max(a, b) a and b are floats 36 def AMDGPUfmax : SDNode<"AMDGPUISD::FMAX", SDTFPBinOp, 37 [SDNPCommutative, SDNPAssociative] 38 >; 39 40 // out = max(a, b) a and b are signed ints 41 def AMDGPUsmax : SDNode<"AMDGPUISD::SMAX", SDTIntBinOp, 42 [SDNPCommutative, SDNPAssociative] 43 >; 44 45 // out = max(a, b) a and b are unsigned ints 46 def AMDGPUumax : SDNode<"AMDGPUISD::UMAX", SDTIntBinOp, 47 [SDNPCommutative, SDNPAssociative] 48 >; 49 50 // out = min(a, b) a and b are floats 51 def AMDGPUfmin : SDNode<"AMDGPUISD::FMIN", SDTFPBinOp, 52 [SDNPCommutative, SDNPAssociative] 53 >; 54 55 // out = min(a, b) a snd b are signed ints 56 def AMDGPUsmin : SDNode<"AMDGPUISD::SMIN", SDTIntBinOp, 57 [SDNPCommutative, SDNPAssociative] 58 >; 59 60 // out = min(a, b) a and b are unsigned ints 61 def AMDGPUumin : SDNode<"AMDGPUISD::UMIN", SDTIntBinOp, 62 [SDNPCommutative, SDNPAssociative] 63 >; 64 65 // urecip - This operation is a helper for integer division, it returns the 66 // result of 1 / a as a fractional unsigned integer. 67 // out = (2^32 / a) + e 68 // e is rounding error 69 def AMDGPUurecip : SDNode<"AMDGPUISD::URECIP", SDTIntUnaryOp>; 70
