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

src/wasm/wasm-opcodes.h

 // Copyright 2015 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_WASM_OPCODES_H_
 #define V8_WASM_OPCODES_H_
 
 #include "src/globals.h"
 #include "src/machine-type.h"
 #include "src/runtime/runtime.h"
@@ skipping 271 matching lines @@
   V(I32AsmjsSConvertF64, 0xe2, i_d)    \
   V(I32AsmjsUConvertF64, 0xe3, i_d)
 
 #define FOREACH_SIMD_0_OPERAND_OPCODE(V) \
   V(F32x4Splat, 0xe500, s_f)             \
   V(F32x4Abs, 0xe503, s_s)               \
   V(F32x4Neg, 0xe504, s_s)               \
   V(F32x4RecipApprox, 0xe506, s_s)       \
   V(F32x4RecipSqrtApprox, 0xe507, s_s)   \
   V(F32x4Add, 0xe508, s_ss)              \
+  V(F32x4AddHoriz, 0xe5b9, s_ss)         \
   V(F32x4Sub, 0xe509, s_ss)              \
   V(F32x4Mul, 0xe50a, s_ss)              \
   V(F32x4Min, 0xe50c, s_ss)              \
   V(F32x4Max, 0xe50d, s_ss)              \
   V(F32x4Eq, 0xe510, s1x4_ss)            \
   V(F32x4Ne, 0xe511, s1x4_ss)            \
   V(F32x4Lt, 0xe512, s1x4_ss)            \
   V(F32x4Le, 0xe513, s1x4_ss)            \
   V(F32x4Gt, 0xe514, s1x4_ss)            \
   V(F32x4Ge, 0xe515, s1x4_ss)            \
   V(F32x4SConvertI32x4, 0xe519, s_s)     \
   V(F32x4UConvertI32x4, 0xe51a, s_s)     \
   V(I32x4Splat, 0xe51b, s_i)             \
   V(I32x4Neg, 0xe51e, s_s)               \
   V(I32x4Add, 0xe51f, s_ss)              \
+  V(I32x4AddHoriz, 0xe5ba, s_ss)         \
   V(I32x4Sub, 0xe520, s_ss)              \
   V(I32x4Mul, 0xe521, s_ss)              \
   V(I32x4MinS, 0xe522, s_ss)             \
   V(I32x4MaxS, 0xe523, s_ss)             \
   V(I32x4Eq, 0xe526, s1x4_ss)            \
   V(I32x4Ne, 0xe527, s1x4_ss)            \
   V(I32x4LtS, 0xe528, s1x4_ss)           \
   V(I32x4LeS, 0xe529, s1x4_ss)           \
   V(I32x4GtS, 0xe52a, s1x4_ss)           \
   V(I32x4GeS, 0xe52b, s1x4_ss)           \
   V(I32x4SConvertF32x4, 0xe52f, s_s)     \
   V(I32x4UConvertF32x4, 0xe537, s_s)     \
   V(I32x4SConvertI16x8Low, 0xe594, s_s)  \
   V(I32x4SConvertI16x8High, 0xe595, s_s) \
   V(I32x4UConvertI16x8Low, 0xe596, s_s)  \
   V(I32x4UConvertI16x8High, 0xe597, s_s) \
   V(I32x4MinU, 0xe530, s_ss)             \
   V(I32x4MaxU, 0xe531, s_ss)             \
   V(I32x4LtU, 0xe533, s1x4_ss)           \
   V(I32x4LeU, 0xe534, s1x4_ss)           \
   V(I32x4GtU, 0xe535, s1x4_ss)           \
   V(I32x4GeU, 0xe536, s1x4_ss)           \
   V(I16x8Splat, 0xe538, s_i)             \
   V(I16x8Neg, 0xe53b, s_s)               \
   V(I16x8Add, 0xe53c, s_ss)              \
   V(I16x8AddSaturateS, 0xe53d, s_ss)     \
+  V(I16x8AddHoriz, 0xe5bb, s_ss)         \
   V(I16x8Sub, 0xe53e, s_ss)              \
   V(I16x8SubSaturateS, 0xe53f, s_ss)     \
   V(I16x8Mul, 0xe540, s_ss)              \
   V(I16x8MinS, 0xe541, s_ss)             \
   V(I16x8MaxS, 0xe542, s_ss)             \
   V(I16x8Eq, 0xe545, s1x8_ss)            \
   V(I16x8Ne, 0xe546, s1x8_ss)            \
   V(I16x8LtS, 0xe547, s1x8_ss)           \
   V(I16x8LeS, 0xe548, s1x8_ss)           \
   V(I16x8GtS, 0xe549, s1x8_ss)           \
@@ skipping 415 matching lines @@
       default:
         return "<unknown>";
     }
   }
 };
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_OPCODES_H_