MIPS[64]: Port `[wasm] Implement wasm sign extension opcodes`

Port 1abeb5a3

Change-Id: Ib31abb7e5e920b319d0e485bf5bcc29fdc018bbc
Bug: chromium:806078
Reviewed-on: https://chromium-review.googlesource.com/888744Reviewed-by: Miran Karić <miran.karic@mips.com>
Commit-Queue: Ivica Bogosavljevic <ivica.bogosavljevic@mips.com>
Cr-Commit-Position: refs/heads/master@{#50902}

src/compiler/mips/instruction-selector-mips.cc

@@ -2260,11 +2260,13 @@ void InstructionSelector::VisitS8x16Shuffle(Node* node) {
 }
 
 void InstructionSelector::VisitSignExtendWord8ToInt32(Node* node) {
-  UNIMPLEMENTED();
+  MipsOperandGenerator g(this);
+  Emit(kMipsSeb, g.DefineAsRegister(node), g.UseRegister(node->InputAt(0)));
 }
 
 void InstructionSelector::VisitSignExtendWord16ToInt32(Node* node) {
-  UNIMPLEMENTED();
+  MipsOperandGenerator g(this);
+  Emit(kMipsSeh, g.DefineAsRegister(node), g.UseRegister(node->InputAt(0)));
 }
 
 // static

src/compiler/mips64/instruction-selector-mips64.cc

@@ -2922,23 +2922,29 @@ void InstructionSelector::VisitS8x16Shuffle(Node* node) {
 }
 
 void InstructionSelector::VisitSignExtendWord8ToInt32(Node* node) {
-  UNIMPLEMENTED();
+  Mips64OperandGenerator g(this);
+  Emit(kMips64Seb, g.DefineAsRegister(node), g.UseRegister(node->InputAt(0)));
 }
 
 void InstructionSelector::VisitSignExtendWord16ToInt32(Node* node) {
-  UNIMPLEMENTED();
+  Mips64OperandGenerator g(this);
+  Emit(kMips64Seh, g.DefineAsRegister(node), g.UseRegister(node->InputAt(0)));
 }
 
 void InstructionSelector::VisitSignExtendWord8ToInt64(Node* node) {
-  UNIMPLEMENTED();
+  Mips64OperandGenerator g(this);
+  Emit(kMips64Seb, g.DefineAsRegister(node), g.UseRegister(node->InputAt(0)));
 }
 
 void InstructionSelector::VisitSignExtendWord16ToInt64(Node* node) {
-  UNIMPLEMENTED();
+  Mips64OperandGenerator g(this);
+  Emit(kMips64Seh, g.DefineAsRegister(node), g.UseRegister(node->InputAt(0)));
 }
 
 void InstructionSelector::VisitSignExtendWord32ToInt64(Node* node) {
-  UNIMPLEMENTED();
+  Mips64OperandGenerator g(this);
+  Emit(kMips64Shl, g.DefineAsRegister(node), g.UseRegister(node->InputAt(0)),
+       g.TempImmediate(0));
 }
 
 // static

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

@@ -10,7 +10,6 @@ namespace v8 {
 namespace internal {
 namespace wasm {
 
-#if !V8_TARGET_ARCH_MIPS && !V8_TARGET_ARCH_MIPS64
 WASM_COMPILED_EXEC_TEST(I32SExtendI8) {
   EXPERIMENTAL_FLAG_SCOPE(se);
   WasmRunner<int32_t, int32_t> r(execution_mode);
@@ -32,12 +31,10 @@ WASM_COMPILED_EXEC_TEST(I32SExtendI16) {
   CHECK_EQ(0x7afa, r.Call(0x7afa));
   CHECK_EQ(-0x8000, r.Call(0x8000));
 }
-#endif  // !V8_TARGET_ARCH_MIPS && !V8_TARGET_ARCH_MIPS64
-
 // TODO(gdeepti): Enable tests to run in the interpreter, and on 32 bit
 // platforms after int64 lowering support. Add JS tests once all ops can be run
 // on 32 bit platforms.
-#if V8_TARGET_ARCH_64_BIT && !V8_TARGET_ARCH_MIPS64
+#if V8_TARGET_ARCH_64_BIT
 WASM_COMPILED_EXEC_TEST(I64SExtendI8) {
   EXPERIMENTAL_FLAG_SCOPE(se);
   WasmRunner<int64_t, int64_t> r(execution_mode);
@@ -70,7 +67,7 @@ WASM_COMPILED_EXEC_TEST(I64SExtendI32) {
   CHECK_EQ(0x7fffffff, r.Call(0x7fffffff));
   CHECK_EQ(-0x80000000LL, r.Call(0x80000000));
 }
-#endif  // V8_TARGET_ARCH_64_BIT && !V8_TARGET_ARCH_MIPS64
+#endif  // V8_TARGET_ARCH_64_BIT
 
 }  // namespace wasm
 }  // namespace internal