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

src/compiler/machine-operator.h

 // Copyright 2013 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.
 
 #ifndef V8_COMPILER_MACHINE_OPERATOR_H_
 #define V8_COMPILER_MACHINE_OPERATOR_H_
 
 #include "src/base/compiler-specific.h"
 #include "src/base/flags.h"
 #include "src/globals.h"
@@ skipping 426 matching lines @@
   const Operator* F32x4Splat();
   const Operator* F32x4ExtractLane(int32_t);
   const Operator* F32x4ReplaceLane(int32_t);
   const Operator* F32x4SConvertI32x4();
   const Operator* F32x4UConvertI32x4();
   const Operator* F32x4Abs();
   const Operator* F32x4Neg();
   const Operator* F32x4RecipApprox();
   const Operator* F32x4RecipSqrtApprox();
   const Operator* F32x4Add();
+  const Operator* F32x4AddHoriz();
   const Operator* F32x4Sub();
   const Operator* F32x4Mul();
   const Operator* F32x4Div();
   const Operator* F32x4Min();
   const Operator* F32x4Max();
   const Operator* F32x4Eq();
   const Operator* F32x4Ne();
   const Operator* F32x4Lt();
   const Operator* F32x4Le();
 
   const Operator* I32x4Splat();
   const Operator* I32x4ExtractLane(int32_t);
   const Operator* I32x4ReplaceLane(int32_t);
   const Operator* I32x4SConvertF32x4();
   const Operator* I32x4SConvertI16x8Low();
   const Operator* I32x4SConvertI16x8High();
   const Operator* I32x4Neg();
   const Operator* I32x4Shl(int32_t);
   const Operator* I32x4ShrS(int32_t);
   const Operator* I32x4Add();
+  const Operator* I32x4AddHoriz();
   const Operator* I32x4Sub();
   const Operator* I32x4Mul();
   const Operator* I32x4MinS();
   const Operator* I32x4MaxS();
   const Operator* I32x4Eq();
   const Operator* I32x4Ne();
   const Operator* I32x4LtS();
   const Operator* I32x4LeS();
 
   const Operator* I32x4UConvertF32x4();
   const Operator* I32x4UConvertI16x8Low();
   const Operator* I32x4UConvertI16x8High();
   const Operator* I32x4ShrU(int32_t);
   const Operator* I32x4MinU();
   const Operator* I32x4MaxU();
   const Operator* I32x4LtU();
   const Operator* I32x4LeU();
 
   const Operator* I16x8Splat();
   const Operator* I16x8ExtractLane(int32_t);
   const Operator* I16x8ReplaceLane(int32_t);
   const Operator* I16x8SConvertI8x16Low();
   const Operator* I16x8SConvertI8x16High();
   const Operator* I16x8Neg();
   const Operator* I16x8Shl(int32_t);
   const Operator* I16x8ShrS(int32_t);
   const Operator* I16x8SConvertI32x4();
   const Operator* I16x8Add();
   const Operator* I16x8AddSaturateS();
+  const Operator* I16x8AddHoriz();
   const Operator* I16x8Sub();
   const Operator* I16x8SubSaturateS();
   const Operator* I16x8Mul();
   const Operator* I16x8MinS();
   const Operator* I16x8MaxS();
   const Operator* I16x8Eq();
   const Operator* I16x8Ne();
   const Operator* I16x8LtS();
   const Operator* I16x8LeS();
 
@@ skipping 203 matching lines @@
 };
 
 
 DEFINE_OPERATORS_FOR_FLAGS(MachineOperatorBuilder::Flags)
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_MACHINE_OPERATOR_H_