[wasm] Int64Lowering of Int64Mul on ia32 and arm.

test/cctest/wasm/test-run-wasm-64.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 <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include "src/wasm/wasm-macro-gen.h"
 
@@ skipping 30 matching lines @@
 
 #define FOREACH_I64_OPERATOR(V) \
   V(DepthFirst, true)           \
   V(I64Phi, true)               \
   V(I64Const, true)             \
   V(I64Return, true)            \
   V(I64Param, true)             \
   V(I64LoadStore, true)         \
   V(I64Add, !MIPS_OR_X87)       \
   V(I64Sub, !MIPS_OR_X87)       \
-  V(I64Mul, false)              \
+  V(I64Mul, !MIPS_OR_X87)       \
   V(I64DivS, true)              \
   V(I64DivU, true)              \
   V(I64RemS, true)              \
   V(I64RemU, true)              \
   V(I64And, true)               \
   V(I64Ior, true)               \
   V(I64Xor, true)               \
   V(I64Shl, !MIPS_OR_X87)       \
   V(I64ShrU, !MIPS_OR_X87)      \
   V(I64ShrS, !MIPS_OR_X87)      \
@@ skipping 804 matching lines @@
   do {                                           \
     if (WASM_64 || kSupported_##name)            \
       TestI64Binop(kExpr##name, expected, a, b); \
   } while (false)
 
 TEST(Run_Wasm_I64Binops) {
   // TODO(titzer): real 64-bit numbers
   TEST_I64_BINOP(I64Add, 8888888888888LL, 3333333333333LL, 5555555555555LL);
   TEST_I64_BINOP(I64Sub, -111111111111LL, 777777777777LL, 888888888888LL);
   TEST_I64_BINOP(I64Mul, 65130756, 88734, 734);
+  TEST_I64_BINOP(I64Mul, 65130756, -88734, -734);
+  TEST_I64_BINOP(I64Mul, -65130756, -88734, 734);
   TEST_I64_BINOP(I64DivS, -66, -4777344, 72384);
   TEST_I64_BINOP(I64DivU, 805306368, 0xF0000000, 5);
   TEST_I64_BINOP(I64RemS, -3, -3003, 1000);
   TEST_I64_BINOP(I64RemU, 4, 4004, 1000);
   TEST_I64_BINOP(I64And, 0xEE, 0xFFEE, 0xFF0000FF);
   TEST_I64_BINOP(I64Ior, 0xF0FF00FF, 0xF0F000EE, 0x000F0011);
   TEST_I64_BINOP(I64Xor, 0xABCDEF01, 0xABCDEFFF, 0xFE);
   TEST_I64_BINOP(I64Shl, 0xA0000000, 0xA, 28);
   TEST_I64_BINOP(I64ShrU, 0x0700001000123456LL, 0x7000010001234567LL, 4);
   TEST_I64_BINOP(I64ShrS, 0xFF00000000000000LL, 0x8000000000000000LL, 7);
@@ skipping 422 matching lines @@
   REQUIRE(I64Eq);
 
   WasmRunner<int32_t> r(MachineType::Int64());
   BUILD(r, WASM_I64_EQZ(WASM_GET_LOCAL(0)));
 
   FOR_INT64_INPUTS(i) {
     int32_t result = *i == 0 ? 1 : 0;
     CHECK_EQ(result, r.Call(*i));
   }
 }