Add several SIMD opcodes to IA32

test/cctest/BUILD.gn

Index: test/cctest/BUILD.gn
diff --git a/test/cctest/BUILD.gn b/test/cctest/BUILD.gn
index bbb3b0afb731605b7e5bb83402881e907f2a6df9..9cc0121e46f065478ce04c494b91c8deb15700bd 100644
--- a/test/cctest/BUILD.gn
+++ b/test/cctest/BUILD.gn
@@ -238,7 +238,7 @@ v8_executable("cctest") {
       "test-log-stack-tracer.cc",
       "test-macro-assembler-ia32.cc",
       "test-run-wasm-relocation-ia32.cc",
-      "wasm/test-run-wasm-simd-lowering.cc",
+      "wasm/test-run-wasm-simd.cc",

[bbudge, 2017/02/15 16:00:12]

Since you're switching to the native tests, you should add #ifdef's in this file
to run the tests for the opcodes you implement in this CL. These should be
similar to the #ifdef's already there for x64.

[Jing, 2017/02/16 05:11:17]

In the file tests for my implemented opcodes are by-default on, so there's no
need to add #ifdef's this time. I will remember to add them when I add opcodes
in the future.

[bbudge, 2017/02/17 00:44:40]

That's right. OK

     ]
   } else if (v8_current_cpu == "mips") {
     sources += [  ### gcmole(arch:mips) ###