[wasm] Track in the interpreter if a NaN could have been produced.

test/cctest/wasm/test-run-wasm-interpreter.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 <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include <memory>
 
@@ skipping 315 matching lines @@
   {
     // Grow memory by an invalid amount without initial memory.
     TestingModule module(kExecuteInterpreted);
     WasmRunner<int32_t> r(&module, MachineType::Uint32());
     module.AddMemory(WasmModule::kPageSize);
     BUILD(r, WASM_GROW_MEMORY(WASM_GET_LOCAL(0)));
     CHECK_EQ(-1, r.Call(1048575));
   }
 }
 
+TEST(TestPossibleNondeterminism) {
+  {
+    // F32Div may produced NaN
+    TestingModule module(kExecuteInterpreted);
+    WasmRunner<float> r(&module, MachineType::Float32(),
+                        MachineType::Float32());
+    BUILD(r, WASM_F32_DIV(WASM_GET_LOCAL(0), WASM_GET_LOCAL(1)));
+    r.Call(1048575.5f, 2.5f);
+    CHECK(!r.possible_nondeterminism());
+    r.Call(0.0f, 0.0f);
+    CHECK(r.possible_nondeterminism());
+  }
+  {
+    // F32Sqrt may produced NaN
+    TestingModule module(kExecuteInterpreted);
+    WasmRunner<float> r(&module, MachineType::Float32());
+    BUILD(r, WASM_F32_SQRT(WASM_GET_LOCAL(0)));
+    r.Call(16.0f);
+    CHECK(!r.possible_nondeterminism());
+    r.Call(-1048575.5f);
+    CHECK(r.possible_nondeterminism());
+  }
+  {
+    // F32Mul may produced NaN
+    TestingModule module(kExecuteInterpreted);
+    WasmRunner<float> r(&module, MachineType::Float32(),
+                        MachineType::Float32());
+    BUILD(r, WASM_F32_MUL(WASM_GET_LOCAL(0), WASM_GET_LOCAL(1)));
+    r.Call(1048575.5f, 2.5f);
+    CHECK(!r.possible_nondeterminism());
+    r.Call(std::numeric_limits<float>::infinity(), 0.0f);
+    CHECK(r.possible_nondeterminism());
+  }
+  {
+    // F64Div may produced NaN
+    TestingModule module(kExecuteInterpreted);
+    WasmRunner<double> r(&module, MachineType::Float64(),
+                         MachineType::Float64());
+    BUILD(r, WASM_F64_DIV(WASM_GET_LOCAL(0), WASM_GET_LOCAL(1)));
+    r.Call(1048575.5, 2.5);
+    CHECK(!r.possible_nondeterminism());
+    r.Call(0.0, 0.0);
+    CHECK(r.possible_nondeterminism());
+  }
+  {
+    // F64Sqrt may produced NaN
+    TestingModule module(kExecuteInterpreted);
+    WasmRunner<double> r(&module, MachineType::Float64());
+    BUILD(r, WASM_F64_SQRT(WASM_GET_LOCAL(0)));
+    r.Call(1048575.5);
+    CHECK(!r.possible_nondeterminism());
+    r.Call(-1048575.5);
+    CHECK(r.possible_nondeterminism());
+  }
+  {
+    // F64Mul may produced NaN
+    TestingModule module(kExecuteInterpreted);
+    WasmRunner<double> r(&module, MachineType::Float64(),
+                         MachineType::Float64());
+    BUILD(r, WASM_F64_MUL(WASM_GET_LOCAL(0), WASM_GET_LOCAL(1)));
+    r.Call(1048575.5, 2.5);
+    CHECK(!r.possible_nondeterminism());
+    r.Call(std::numeric_limits<double>::infinity(), 0.0);
+    CHECK(r.possible_nondeterminism());
+  }
+}
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8