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

src/wasm/wasm-opcodes.cc

Index: src/wasm/wasm-opcodes.cc
diff --git a/src/wasm/wasm-opcodes.cc b/src/wasm/wasm-opcodes.cc
index c279bc3ca8f696eb2e5140978ee148076bf6d985..2bafaa0aa89ecc903fae5fa29a503b846fd223f9 100644
--- a/src/wasm/wasm-opcodes.cc
+++ b/src/wasm/wasm-opcodes.cc
@@ -175,6 +175,7 @@ const char* WasmOpcodes::OpcodeName(WasmOpcode opcode) {
     CASE_SIMD_OP(Sub, "sub")
     CASE_SIMD_OP(Mul, "mul")
     CASE_F32x4_OP(Abs, "abs")
+    CASE_F32x4_OP(AddHoriz, "add_horizontal")
     CASE_F32x4_OP(RecipApprox, "recip_approx")
     CASE_F32x4_OP(RecipSqrtApprox, "recip_sqrt_approx")
     CASE_F32x4_OP(Min, "min")
@@ -203,6 +204,8 @@ const char* WasmOpcodes::OpcodeName(WasmOpcode opcode) {
     CASE_SIGN_OP(SIMDI, Ge, "ge")
     CASE_SIGN_OP(SIMDI, Shr, "shr")
     CASE_SIMDI_OP(Shl, "shl")
+    CASE_I32x4_OP(AddHoriz, "add_horizontal")
+    CASE_I16x8_OP(AddHoriz, "add_horizontal")
     CASE_SIGN_OP(I16x8, AddSaturate, "add_saturate")
     CASE_SIGN_OP(I8x16, AddSaturate, "add_saturate")
     CASE_SIGN_OP(I16x8, SubSaturate, "sub_saturate")