[WASM SIMD] Remove opcodes that are slow on some platforms.

src/compiler/simd-scalar-lowering.cc

 // Copyright 2016 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/compiler/simd-scalar-lowering.h"
 #include "src/compiler/diamond.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 
@@ skipping 78 matching lines @@
   V(F32x4Splat)                     \
   V(F32x4ExtractLane)               \
   V(F32x4ReplaceLane)               \
   V(F32x4SConvertI32x4)             \
   V(F32x4UConvertI32x4)             \
   V(F32x4Abs)                       \
   V(F32x4Neg)                       \
   V(F32x4Add)                       \
   V(F32x4Sub)                       \
   V(F32x4Mul)                       \
-  V(F32x4Div)                       \
   V(F32x4Min)                       \
   V(F32x4Max)
 
 #define FOREACH_FLOAT32X4_TO_SIMD1X4OPCODE(V) \
   V(F32x4Eq)                                  \
   V(F32x4Ne)                                  \
   V(F32x4Lt)                                  \
   V(F32x4Le)                                  \
   V(F32x4Gt)                                  \
   V(F32x4Ge)
@@ skipping 529 matching lines @@
       break;
     }
 #define F32X4_BINOP_CASE(name)                                 \
   case IrOpcode::kF32x4##name: {                               \
     LowerBinaryOp(node, rep_type, machine()->Float32##name()); \
     break;                                                     \
   }
       F32X4_BINOP_CASE(Add)
       F32X4_BINOP_CASE(Sub)
       F32X4_BINOP_CASE(Mul)
-      F32X4_BINOP_CASE(Div)
       F32X4_BINOP_CASE(Min)
       F32X4_BINOP_CASE(Max)
 #undef F32X4_BINOP_CASE
 #define F32X4_UNOP_CASE(name)                                 \
   case IrOpcode::kF32x4##name: {                              \
     LowerUnaryOp(node, rep_type, machine()->Float32##name()); \
     break;                                                    \
   }
       F32X4_UNOP_CASE(Abs)
       F32X4_UNOP_CASE(Neg)
-      F32X4_UNOP_CASE(Sqrt)
 #undef F32x4_UNOP_CASE
     case IrOpcode::kF32x4SConvertI32x4: {
       LowerUnaryOp(node, SimdType::kInt32, machine()->RoundInt32ToFloat32());
       break;
     }
     case IrOpcode::kF32x4UConvertI32x4: {
       LowerUnaryOp(node, SimdType::kInt32, machine()->RoundUint32ToFloat32());
       break;
     }
     case IrOpcode::kI32x4Splat:
@@ skipping 194 matching lines @@
       } else {
         UNREACHABLE();
       }
     }
     ReplaceNode(phi, rep_nodes);
   }
 }
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8