[WASM SIMD] Implement horizontal add for float and integer types.

src/compiler/arm/instruction-selector-arm.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/base/adapters.h"
 #include "src/base/bits.h"
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 
@@ skipping 2425 matching lines @@
   V(I32x4ShrU)                \
   V(I16x8Shl)                 \
   V(I16x8ShrS)                \
   V(I16x8ShrU)                \
   V(I8x16Shl)                 \
   V(I8x16ShrS)                \
   V(I8x16ShrU)
 
 #define SIMD_BINOP_LIST(V)                          \
   V(F32x4Add, kArmF32x4Add)                         \
+  V(F32x4AddHoriz, kArmF32x4AddHoriz)               \
   V(F32x4Sub, kArmF32x4Sub)                         \
   V(F32x4Mul, kArmF32x4Mul)                         \
   V(F32x4Min, kArmF32x4Min)                         \
   V(F32x4Max, kArmF32x4Max)                         \
   V(F32x4RecipRefine, kArmF32x4RecipRefine)         \
   V(F32x4RecipSqrtRefine, kArmF32x4RecipSqrtRefine) \
   V(F32x4Eq, kArmF32x4Eq)                           \
   V(F32x4Ne, kArmF32x4Ne)                           \
   V(F32x4Lt, kArmF32x4Lt)                           \
   V(F32x4Le, kArmF32x4Le)                           \
   V(I32x4Add, kArmI32x4Add)                         \
+  V(I32x4AddHoriz, kArmI32x4AddHoriz)               \
   V(I32x4Sub, kArmI32x4Sub)                         \
   V(I32x4Mul, kArmI32x4Mul)                         \
   V(I32x4MinS, kArmI32x4MinS)                       \
   V(I32x4MaxS, kArmI32x4MaxS)                       \
   V(I32x4Eq, kArmI32x4Eq)                           \
   V(I32x4Ne, kArmI32x4Ne)                           \
   V(I32x4LtS, kArmI32x4LtS)                         \
   V(I32x4LeS, kArmI32x4LeS)                         \
   V(I32x4MinU, kArmI32x4MinU)                       \
   V(I32x4MaxU, kArmI32x4MaxU)                       \
   V(I32x4LtU, kArmI32x4LtU)                         \
   V(I32x4LeU, kArmI32x4LeU)                         \
   V(I16x8SConvertI32x4, kArmI16x8SConvertI32x4)     \
   V(I16x8Add, kArmI16x8Add)                         \
   V(I16x8AddSaturateS, kArmI16x8AddSaturateS)       \
+  V(I16x8AddHoriz, kArmI16x8AddHoriz)               \
   V(I16x8Sub, kArmI16x8Sub)                         \
   V(I16x8SubSaturateS, kArmI16x8SubSaturateS)       \
   V(I16x8Mul, kArmI16x8Mul)                         \
   V(I16x8MinS, kArmI16x8MinS)                       \
   V(I16x8MaxS, kArmI16x8MaxS)                       \
   V(I16x8Eq, kArmI16x8Eq)                           \
   V(I16x8Ne, kArmI16x8Ne)                           \
   V(I16x8LtS, kArmI16x8LtS)                         \
   V(I16x8LeS, kArmI16x8LeS)                         \
   V(I16x8UConvertI32x4, kArmI16x8UConvertI32x4)     \
   V(I16x8AddSaturateU, kArmI16x8AddSaturateU)       \
   V(I16x8SubSaturateU, kArmI16x8SubSaturateU)       \
   V(I16x8MinU, kArmI16x8MinU)                       \
   V(I16x8MaxU, kArmI16x8MaxU)                       \
   V(I16x8LtU, kArmI16x8LtU)                         \
   V(I16x8LeU, kArmI16x8LeU)                         \
   V(I8x16SConvertI16x8, kArmI8x16SConvertI16x8)     \
   V(I8x16Add, kArmI8x16Add)                         \
   V(I8x16AddSaturateS, kArmI8x16AddSaturateS)       \
+  V(I8x16AddHoriz, kArmI8x16AddHoriz)               \
   V(I8x16Sub, kArmI8x16Sub)                         \
   V(I8x16SubSaturateS, kArmI8x16SubSaturateS)       \
   V(I8x16Mul, kArmI8x16Mul)                         \
   V(I8x16MinS, kArmI8x16MinS)                       \
   V(I8x16MaxS, kArmI8x16MaxS)                       \
   V(I8x16Eq, kArmI8x16Eq)                           \
   V(I8x16Ne, kArmI8x16Ne)                           \
   V(I8x16LtS, kArmI8x16LtS)                         \
   V(I8x16LeS, kArmI8x16LeS)                         \
   V(I8x16UConvertI16x8, kArmI8x16UConvertI16x8)     \
@@ skipping 149 matching lines @@
   Vector<MachineType> req_aligned = Vector<MachineType>::New(2);
   req_aligned[0] = MachineType::Float32();
   req_aligned[1] = MachineType::Float64();
   return MachineOperatorBuilder::AlignmentRequirements::
       SomeUnalignedAccessUnsupported(req_aligned, req_aligned);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8