[wasm] Fixed F32Neg and F64Neg for -0.0.

test/cctest/wasm/test-run-wasm.cc

 // 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.
 
 #include <stdlib.h>
 #include <string.h>
 
 #include "src/compiler/graph-visualizer.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/wasm-compiler.h"
@@ skipping 1130 matching lines @@
 
 
 TEST(Run_WasmFloat64Unops) {
   TestFloat64UnopWithConvert(kExprF64Abs, 108, 108.125);
   TestFloat64UnopWithConvert(kExprF64Abs, 209, -209.125);
   TestFloat64UnopWithConvert(kExprF64Neg, -209, 209.125);
   TestFloat64UnopWithConvert(kExprF64Sqrt, 13, 169.4);
 }
 
 
+TEST(Run_WasmFloat32Neg) {
+  WasmRunner<float> r(MachineType::Float32());
+  BUILD(r, WASM_F32_NEG(WASM_GET_LOCAL(0)));
+
+  FOR_FLOAT32_INPUTS(i) { CheckFloatEq(-(*i), r.Call(*i)); }
+
+  // The difference between +0 and -0 matters here.
+  CHECK_EQ(bit_cast<uint32_t>(-0.0f), bit_cast<uint32_t>(r.Call(0.0f)));
+  CHECK_EQ(bit_cast<uint32_t>(0.0f), bit_cast<uint32_t>(r.Call(-0.0f)));
+}
+
+
+TEST(Run_WasmFloat64Neg) {
+  WasmRunner<double> r(MachineType::Float64());
+  BUILD(r, WASM_F64_NEG(WASM_GET_LOCAL(0)));
+
+  FOR_FLOAT64_INPUTS(i) { CheckDoubleEq(-(*i), r.Call(*i)); }
+
+  // The difference between +0 and -0 matters here.
+  CHECK_EQ(bit_cast<uint64_t>(-0.0), bit_cast<uint64_t>(r.Call(0.0)));
+  CHECK_EQ(bit_cast<uint64_t>(0.0), bit_cast<uint64_t>(r.Call(-0.0)));
+}
+
+
 TEST(Run_Wasm_IfElse_P) {
   WasmRunner<int32_t> r(MachineType::Int32());
   // if (p0) return 11; else return 22;
   BUILD(r, WASM_IF_ELSE(WASM_GET_LOCAL(0),  // --
                         WASM_I8(11),        // --
                         WASM_I8(22)));      // --
   FOR_INT32_INPUTS(i) {
     int32_t expected = *i ? 11 : 22;
     CHECK_EQ(expected, r.Call(*i));
   }
@@ skipping 2096 matching lines @@
 
 
 TEST(Run_Wasm_F32CopySign) {
   WasmRunner<float> r(MachineType::Float32(), MachineType::Float32());
   BUILD(r, WASM_F32_COPYSIGN(WASM_GET_LOCAL(0), WASM_GET_LOCAL(1)));
 
   FOR_FLOAT32_INPUTS(i) {
     FOR_FLOAT32_INPUTS(j) { CheckFloatEq(copysign(*i, *j), r.Call(*i, *j)); }
   }
 }