|
| 1 | +// Licensed to the .NET Foundation under one or more agreements. |
| 2 | +// The .NET Foundation licenses this file to you under the MIT license. |
| 3 | + |
| 4 | +/*XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX |
| 5 | +XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX |
| 6 | +XX XX |
| 7 | +XX Arm64 Specific Morph XX |
| 8 | +XX XX |
| 9 | +XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX |
| 10 | +XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX |
| 11 | +*/ |
| 12 | + |
| 13 | +#include "jitpch.h" |
| 14 | +#ifdef _MSC_VER |
| 15 | +#pragma hdrstop |
| 16 | +#endif |
| 17 | + |
| 18 | +#ifdef FEATURE_MASKED_HW_INTRINSICS |
| 19 | + |
| 20 | +//------------------------------------------------------------------------ |
| 21 | +// HasAllMaskVariant: Does this intrinsic have a variant where all of it's operands |
| 22 | +// are mask types? |
| 23 | +// |
| 24 | +// Return Value: |
| 25 | +// true if an all-mask variant exists for the intrinsic, else false. |
| 26 | +// |
| 27 | +bool GenTreeHWIntrinsic::HasAllMaskVariant() |
| 28 | +{ |
| 29 | + switch (GetHWIntrinsicId()) |
| 30 | + { |
| 31 | + // ZIP1 <Pd>.<T>, <Pn>.<T>, <Pm>.<T> |
| 32 | + // ZIP2 <Pd>.<T>, <Pn>.<T>, <Pm>.<T> |
| 33 | + // UZP1 <Pd>.<T>, <Pn>.<T>, <Pm>.<T> |
| 34 | + // UZP2 <Pd>.<T>, <Pn>.<T>, <Pm>.<T> |
| 35 | + // TRN1 <Pd>.<T>, <Pn>.<T>, <Pm>.<T> |
| 36 | + // TRN2 <Pd>.<T>, <Pn>.<T>, <Pm>.<T> |
| 37 | + // REV <Pd>.<T>, <Pn>.<T> |
| 38 | + case NI_Sve_ZipHigh: |
| 39 | + case NI_Sve_ZipLow: |
| 40 | + case NI_Sve_UnzipOdd: |
| 41 | + case NI_Sve_UnzipEven: |
| 42 | + case NI_Sve_TransposeEven: |
| 43 | + case NI_Sve_TransposeOdd: |
| 44 | + case NI_Sve_ReverseElement: |
| 45 | + return true; |
| 46 | + |
| 47 | + default: |
| 48 | + return false; |
| 49 | + } |
| 50 | +} |
| 51 | + |
| 52 | +//------------------------------------------------------------------------ |
| 53 | +// canMorphVectorOperandToMask: Can this vector operand be converted to a |
| 54 | +// node with type TYP_MASK easily? |
| 55 | +// |
| 56 | +bool Compiler::canMorphVectorOperandToMask(GenTree* node) |
| 57 | +{ |
| 58 | + return varTypeIsMask(node) || node->OperIsConvertMaskToVector() || node->IsVectorZero(); |
| 59 | +} |
| 60 | + |
| 61 | +//------------------------------------------------------------------------ |
| 62 | +// canMorphAllVectorOperandsToMasks: Can all vector operands to this node |
| 63 | +// be converted to a node with type |
| 64 | +// TYP_MASK easily? |
| 65 | +// |
| 66 | +bool Compiler::canMorphAllVectorOperandsToMasks(GenTreeHWIntrinsic* node) |
| 67 | +{ |
| 68 | + bool allMaskConversions = true; |
| 69 | + for (size_t i = 1; i <= node->GetOperandCount() && allMaskConversions; i++) |
| 70 | + { |
| 71 | + allMaskConversions &= canMorphVectorOperandToMask(node->Op(i)); |
| 72 | + } |
| 73 | + |
| 74 | + return allMaskConversions; |
| 75 | +} |
| 76 | + |
| 77 | +//------------------------------------------------------------------------ |
| 78 | +// doMorphVectorOperandToMask: Morph a vector node that is close to a mask |
| 79 | +// node into a mask node. |
| 80 | +// |
| 81 | +// Return value: |
| 82 | +// The morphed tree, or nullptr if the transform is not applicable. |
| 83 | +// |
| 84 | +GenTree* Compiler::doMorphVectorOperandToMask(GenTree* node, GenTreeHWIntrinsic* parent) |
| 85 | +{ |
| 86 | + if (varTypeIsMask(node)) |
| 87 | + { |
| 88 | + // Already a mask, nothing to do. |
| 89 | + return node; |
| 90 | + } |
| 91 | + else if (node->OperIsConvertMaskToVector()) |
| 92 | + { |
| 93 | + // Replace node with op1. |
| 94 | + return node->AsHWIntrinsic()->Op(1); |
| 95 | + } |
| 96 | + else if (node->IsVectorZero()) |
| 97 | + { |
| 98 | + // Morph the vector of zeroes into mask of zeroes. |
| 99 | + GenTree* mask = gtNewSimdAllFalseMaskNode(parent->GetSimdSize()); |
| 100 | + mask->SetMorphed(this); |
| 101 | + return mask; |
| 102 | + } |
| 103 | + |
| 104 | + return nullptr; |
| 105 | +} |
| 106 | + |
| 107 | +//----------------------------------------------------------------------------------------------------- |
| 108 | +// fgMorphTryUseAllMaskVariant: For NamedIntrinsics that have a variant where all operands are |
| 109 | +// mask nodes. If all operands to this node are 'suggesting' that they |
| 110 | +// originate closely from a mask, but are of vector types, then morph the |
| 111 | +// operands as appropriate to use mask types instead. 'Suggesting' |
| 112 | +// is defined by the canMorphVectorOperandToMask function. |
| 113 | +// |
| 114 | +// Arguments: |
| 115 | +// tree - The HWIntrinsic to try and optimize. |
| 116 | +// |
| 117 | +// Return Value: |
| 118 | +// The fully morphed tree if a change was made, else nullptr. |
| 119 | +// |
| 120 | +GenTree* Compiler::fgMorphTryUseAllMaskVariant(GenTreeHWIntrinsic* node) |
| 121 | +{ |
| 122 | + if (node->HasAllMaskVariant() && canMorphAllVectorOperandsToMasks(node)) |
| 123 | + { |
| 124 | + for (size_t i = 1; i <= node->GetOperandCount(); i++) |
| 125 | + { |
| 126 | + node->Op(i) = doMorphVectorOperandToMask(node->Op(i), node); |
| 127 | + } |
| 128 | + |
| 129 | + node->gtType = TYP_MASK; |
| 130 | + return node; |
| 131 | + } |
| 132 | + |
| 133 | + if (node->OperIsHWIntrinsic(NI_Sve_ConditionalSelect)) |
| 134 | + { |
| 135 | + GenTree* mask = node->Op(1); |
| 136 | + GenTree* left = node->Op(2); |
| 137 | + GenTree* right = node->Op(3); |
| 138 | + |
| 139 | + if (left->OperIsHWIntrinsic()) |
| 140 | + { |
| 141 | + assert(canMorphVectorOperandToMask(mask)); |
| 142 | + |
| 143 | + if (canMorphAllVectorOperandsToMasks(left->AsHWIntrinsic())) |
| 144 | + { |
| 145 | + // At this point we know the 'left' node is a HWINTRINSIC node and all of its operands look like |
| 146 | + // mask nodes. |
| 147 | + // |
| 148 | + // The ConditionalSelect could be substituted for the named intrinsic in it's 'left' operand and |
| 149 | + // transformed to a mask-type operation for some named intrinsics. Doing so will encourage codegen |
| 150 | + // to emit predicate variants of instructions rather than vector variants, and we can lose some |
| 151 | + // unnecessary mask->vector conversion nodes. |
| 152 | + GenTreeHWIntrinsic* actualOp = left->AsHWIntrinsic(); |
| 153 | + |
| 154 | + switch (actualOp->GetHWIntrinsicId()) |
| 155 | + { |
| 156 | + // AND <Pd>.B, <Pg>/Z, <Pn>.B, <Pm>.B |
| 157 | + // BIC <Pd>.B, <Pg>/Z, <Pn>.B, <Pm>.B |
| 158 | + // EOR <Pd>.B, <Pg>/Z, <Pn>.B, <Pm>.B |
| 159 | + // ORR <Pd>.B, <Pg>/Z, <Pn>.B, <Pm>.B |
| 160 | + case NI_Sve_And: |
| 161 | + case NI_Sve_BitwiseClear: |
| 162 | + case NI_Sve_Xor: |
| 163 | + case NI_Sve_Or: |
| 164 | + if (right->IsVectorZero()) |
| 165 | + { |
| 166 | + // The operation is equivalent for all lane arrangements, because it is a bitwise operation. |
| 167 | + // It's safe to bash the type to 8-bit required to assemble the instruction. |
| 168 | + actualOp->SetSimdBaseJitType(CORINFO_TYPE_BYTE); |
| 169 | + |
| 170 | + actualOp->ResetHWIntrinsicId(actualOp->GetHWIntrinsicId(), this, |
| 171 | + doMorphVectorOperandToMask(mask, actualOp), |
| 172 | + doMorphVectorOperandToMask(actualOp->Op(1), actualOp), |
| 173 | + doMorphVectorOperandToMask(actualOp->Op(2), actualOp)); |
| 174 | + actualOp->gtType = TYP_MASK; |
| 175 | + return actualOp; |
| 176 | + } |
| 177 | + break; |
| 178 | + default: |
| 179 | + break; |
| 180 | + } |
| 181 | + } |
| 182 | + } |
| 183 | + |
| 184 | + // If we got this far, then there was no match on any predicated operation. |
| 185 | + // ConditionalSelect itself can be a mask operation for 8-bit lane types, using |
| 186 | + // SEL <Pd>.B, <Pg>, <Pn>.B, <Pm>.B |
| 187 | + if (canMorphAllVectorOperandsToMasks(node)) |
| 188 | + { |
| 189 | + for (size_t i = 1; i <= node->GetOperandCount(); i++) |
| 190 | + { |
| 191 | + node->Op(i) = doMorphVectorOperandToMask(node->Op(i), node); |
| 192 | + } |
| 193 | + |
| 194 | + // Again this operation is bitwise, so the lane arrangement doesn't matter. |
| 195 | + // We can bash the type to 8-bit. |
| 196 | + node->SetSimdBaseJitType(CORINFO_TYPE_BYTE); |
| 197 | + |
| 198 | + node->gtType = TYP_MASK; |
| 199 | + return node; |
| 200 | + } |
| 201 | + } |
| 202 | + |
| 203 | + return nullptr; |
| 204 | +} |
| 205 | + |
| 206 | +#endif // FEATURE_MASKED_HW_INTRINSICS |
0 commit comments