[wasm] Int64Lowering of I64Div and I64Rem.

src/wasm/wasm-external-refs.h

 // 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.
 
 #ifndef WASM_EXTERNAL_REFS_H
 #define WASM_EXTERNAL_REFS_H
 
 namespace v8 {
 namespace internal {
 namespace wasm {
@@ skipping 121 matching lines @@
   // We use "<" here to check the upper bound because of rounding problems: With
   // "<=" some inputs would be considered within uint64 range which are actually
   // not within uint64 range.
   if (*input > -1.0 &&
       *input < static_cast<double>(std::numeric_limits<uint64_t>::max())) {
     *output = static_cast<uint64_t>(*input);
     return 1;
   }
   return 0;
 }
+
+static int32_t int64_div_wrapper(int64_t* dst, int64_t* src) {
+  if (*src == 0) {
+    return 0;
+  }
+  if (*src == -1 && *dst == std::numeric_limits<int64_t>::min()) {
+    return -1;
+  }
+  *dst /= *src;
+  return 1;
+}
+
+static int32_t int64_mod_wrapper(int64_t* dst, int64_t* src) {
+  if (*src == 0) {
+    return 0;
+  }
+  *dst %= *src;
+  return 1;
+}
+
+static int32_t uint64_div_wrapper(uint64_t* dst, uint64_t* src) {
+  if (*src == 0) {
+    return 0;
+  }
+  *dst /= *src;
+  return 1;
+}
+
+static int32_t uint64_mod_wrapper(uint64_t* dst, uint64_t* src) {
+  if (*src == 0) {
+    return 0;
+  }
+  *dst %= *src;
+  return 1;
+}
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif