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

src/compiler/opcodes.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_OPCODES_H_
 #define V8_COMPILER_OPCODES_H_
 
 #include <iosfwd>
 
 #include "src/globals.h"
@@ skipping 560 matching lines @@
   V(F32x4Splat)                 \
   V(F32x4ExtractLane)           \
   V(F32x4ReplaceLane)           \
   V(F32x4SConvertI32x4)         \
   V(F32x4UConvertI32x4)         \
   V(F32x4Abs)                   \
   V(F32x4Neg)                   \
   V(F32x4RecipApprox)           \
   V(F32x4RecipSqrtApprox)       \
   V(F32x4Add)                   \
+  V(F32x4AddHoriz)              \
   V(F32x4Sub)                   \
   V(F32x4Mul)                   \
   V(F32x4Min)                   \
   V(F32x4Max)                   \
   V(F32x4Eq)                    \
   V(F32x4Ne)                    \
   V(F32x4Lt)                    \
   V(F32x4Le)                    \
   V(F32x4Gt)                    \
   V(F32x4Ge)                    \
   V(I32x4Splat)                 \
   V(I32x4ExtractLane)           \
   V(I32x4ReplaceLane)           \
   V(I32x4SConvertF32x4)         \
   V(I32x4SConvertI16x8Low)      \
   V(I32x4SConvertI16x8High)     \
   V(I32x4Neg)                   \
   V(I32x4Shl)                   \
   V(I32x4ShrS)                  \
   V(I32x4Add)                   \
+  V(I32x4AddHoriz)              \
   V(I32x4Sub)                   \
   V(I32x4Mul)                   \
   V(I32x4MinS)                  \
   V(I32x4MaxS)                  \
   V(I32x4Eq)                    \
   V(I32x4Ne)                    \
   V(I32x4LtS)                   \
   V(I32x4LeS)                   \
   V(I32x4GtS)                   \
   V(I32x4GeS)                   \
@@ skipping 11 matching lines @@
   V(I16x8ExtractLane)           \
   V(I16x8ReplaceLane)           \
   V(I16x8SConvertI8x16Low)      \
   V(I16x8SConvertI8x16High)     \
   V(I16x8Neg)                   \
   V(I16x8Shl)                   \
   V(I16x8ShrS)                  \
   V(I16x8SConvertI32x4)         \
   V(I16x8Add)                   \
   V(I16x8AddSaturateS)          \
+  V(I16x8AddHoriz)              \
   V(I16x8Sub)                   \
   V(I16x8SubSaturateS)          \
   V(I16x8Mul)                   \
   V(I16x8MinS)                  \
   V(I16x8MaxS)                  \
   V(I16x8Eq)                    \
   V(I16x8Ne)                    \
   V(I16x8LtS)                   \
   V(I16x8LeS)                   \
   V(I16x8GtS)                   \
@@ skipping 186 matching lines @@
   }
 };
 
 V8_EXPORT_PRIVATE std::ostream& operator<<(std::ostream&, IrOpcode::Value);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_OPCODES_H_