[arm] Recognize SXTB, SXTH, UXTB and UXTH.

test/cctest/test-assembler-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1357 matching lines @@
   __ mov(r4, Operand(r0));
   __ ldr(r0, MemOperand(r4, OFFSET_OF(T, src0)));
   __ ldr(r1, MemOperand(r4, OFFSET_OF(T, src1)));
 
   __ pkhbt(r2, r0, Operand(r1, LSL, 8));
   __ str(r2, MemOperand(r4, OFFSET_OF(T, dst0)));
 
   __ pkhtb(r2, r0, Operand(r1, ASR, 8));
   __ str(r2, MemOperand(r4, OFFSET_OF(T, dst1)));
 
-  __ uxtb16(r2, Operand(r0, ROR, 8));
+  __ uxtb16(r2, r0, 8);
   __ str(r2, MemOperand(r4, OFFSET_OF(T, dst2)));
 
-  __ uxtb(r2, Operand(r0, ROR, 8));
+  __ uxtb(r2, r0, 8);
   __ str(r2, MemOperand(r4, OFFSET_OF(T, dst3)));
 
   __ ldr(r0, MemOperand(r4, OFFSET_OF(T, src2)));
-  __ uxtab(r2, r0, Operand(r1, ROR, 8));
+  __ uxtab(r2, r0, r1, 8);
   __ str(r2, MemOperand(r4, OFFSET_OF(T, dst4)));
 
   __ ldm(ia_w, sp, r4.bit() | pc.bit());
 
   CodeDesc desc;
   assm.GetCode(&desc);
   Handle<Code> code = isolate->factory()->NewCode(
       desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
 #ifdef DEBUG
   OFStream os(stdout);
@@ skipping 203 matching lines @@
   F3 f = FUNCTION_CAST<F3>(code->entry());
   for (size_t i = 0; i < 128; ++i) {
     int32_t r, x = rng->NextInt(), y = rng->NextInt();
     Object* dummy = CALL_GENERATED_CODE(f, &r, x, y, 0, 0);
     CHECK_EQ(bits::SignedMulHigh32(x, y), r);
     USE(dummy);
   }
 }
 
 
+TEST(sxtb) {
+  CcTest::InitializeVM();
+  Isolate* const isolate = CcTest::i_isolate();
+  HandleScope scope(isolate);
+  RandomNumberGenerator* const rng = isolate->random_number_generator();
+  Assembler assm(isolate, nullptr, 0);
+  __ sxtb(r1, r1);
+  __ str(r1, MemOperand(r0));
+  __ bx(lr);
+  CodeDesc desc;
+  assm.GetCode(&desc);
+  Handle<Code> code = isolate->factory()->NewCode(
+      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
+#ifdef OBJECT_PRINT
+  code->Print(std::cout);
+#endif
+  F3 f = FUNCTION_CAST<F3>(code->entry());
+  for (size_t i = 0; i < 128; ++i) {
+    int32_t r, x = rng->NextInt();
+    Object* dummy = CALL_GENERATED_CODE(f, &r, x, 0, 0, 0);
+    CHECK_EQ(static_cast<int32_t>(static_cast<int8_t>(x)), r);
+    USE(dummy);
+  }
+}
+
+
+TEST(sxtab) {
+  CcTest::InitializeVM();
+  Isolate* const isolate = CcTest::i_isolate();
+  HandleScope scope(isolate);
+  RandomNumberGenerator* const rng = isolate->random_number_generator();
+  Assembler assm(isolate, nullptr, 0);
+  __ sxtab(r1, r2, r1);
+  __ str(r1, MemOperand(r0));
+  __ bx(lr);
+  CodeDesc desc;
+  assm.GetCode(&desc);
+  Handle<Code> code = isolate->factory()->NewCode(
+      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
+#ifdef OBJECT_PRINT
+  code->Print(std::cout);
+#endif
+  F3 f = FUNCTION_CAST<F3>(code->entry());
+  for (size_t i = 0; i < 128; ++i) {
+    int32_t r, x = rng->NextInt(), y = rng->NextInt();
+    Object* dummy = CALL_GENERATED_CODE(f, &r, x, y, 0, 0);
+    CHECK_EQ(static_cast<int32_t>(static_cast<int8_t>(x)) + y, r);
+    USE(dummy);
+  }
+}
+
+
+TEST(sxth) {
+  CcTest::InitializeVM();
+  Isolate* const isolate = CcTest::i_isolate();
+  HandleScope scope(isolate);
+  RandomNumberGenerator* const rng = isolate->random_number_generator();
+  Assembler assm(isolate, nullptr, 0);
+  __ sxth(r1, r1);
+  __ str(r1, MemOperand(r0));
+  __ bx(lr);
+  CodeDesc desc;
+  assm.GetCode(&desc);
+  Handle<Code> code = isolate->factory()->NewCode(
+      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
+#ifdef OBJECT_PRINT
+  code->Print(std::cout);
+#endif
+  F3 f = FUNCTION_CAST<F3>(code->entry());
+  for (size_t i = 0; i < 128; ++i) {
+    int32_t r, x = rng->NextInt();
+    Object* dummy = CALL_GENERATED_CODE(f, &r, x, 0, 0, 0);
+    CHECK_EQ(static_cast<int32_t>(static_cast<int16_t>(x)), r);
+    USE(dummy);
+  }
+}
+
+
+TEST(sxtah) {
+  CcTest::InitializeVM();
+  Isolate* const isolate = CcTest::i_isolate();
+  HandleScope scope(isolate);
+  RandomNumberGenerator* const rng = isolate->random_number_generator();
+  Assembler assm(isolate, nullptr, 0);
+  __ sxtah(r1, r2, r1);
+  __ str(r1, MemOperand(r0));
+  __ bx(lr);
+  CodeDesc desc;
+  assm.GetCode(&desc);
+  Handle<Code> code = isolate->factory()->NewCode(
+      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
+#ifdef OBJECT_PRINT
+  code->Print(std::cout);
+#endif
+  F3 f = FUNCTION_CAST<F3>(code->entry());
+  for (size_t i = 0; i < 128; ++i) {
+    int32_t r, x = rng->NextInt(), y = rng->NextInt();
+    Object* dummy = CALL_GENERATED_CODE(f, &r, x, y, 0, 0);
+    CHECK_EQ(static_cast<int32_t>(static_cast<int16_t>(x)) + y, r);
+    USE(dummy);
+  }
+}
+
+
+TEST(uxtb) {
+  CcTest::InitializeVM();
+  Isolate* const isolate = CcTest::i_isolate();
+  HandleScope scope(isolate);
+  RandomNumberGenerator* const rng = isolate->random_number_generator();
+  Assembler assm(isolate, nullptr, 0);
+  __ uxtb(r1, r1);
+  __ str(r1, MemOperand(r0));
+  __ bx(lr);
+  CodeDesc desc;
+  assm.GetCode(&desc);
+  Handle<Code> code = isolate->factory()->NewCode(
+      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
+#ifdef OBJECT_PRINT
+  code->Print(std::cout);
+#endif
+  F3 f = FUNCTION_CAST<F3>(code->entry());
+  for (size_t i = 0; i < 128; ++i) {
+    int32_t r, x = rng->NextInt();
+    Object* dummy = CALL_GENERATED_CODE(f, &r, x, 0, 0, 0);
+    CHECK_EQ(static_cast<int32_t>(static_cast<uint8_t>(x)), r);
+    USE(dummy);
+  }
+}
+
+
+TEST(uxtab) {
+  CcTest::InitializeVM();
+  Isolate* const isolate = CcTest::i_isolate();
+  HandleScope scope(isolate);
+  RandomNumberGenerator* const rng = isolate->random_number_generator();
+  Assembler assm(isolate, nullptr, 0);
+  __ uxtab(r1, r2, r1);
+  __ str(r1, MemOperand(r0));
+  __ bx(lr);
+  CodeDesc desc;
+  assm.GetCode(&desc);
+  Handle<Code> code = isolate->factory()->NewCode(
+      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
+#ifdef OBJECT_PRINT
+  code->Print(std::cout);
+#endif
+  F3 f = FUNCTION_CAST<F3>(code->entry());
+  for (size_t i = 0; i < 128; ++i) {
+    int32_t r, x = rng->NextInt(), y = rng->NextInt();
+    Object* dummy = CALL_GENERATED_CODE(f, &r, x, y, 0, 0);
+    CHECK_EQ(static_cast<int32_t>(static_cast<uint8_t>(x)) + y, r);
+    USE(dummy);
+  }
+}
+
+
+TEST(uxth) {
+  CcTest::InitializeVM();
+  Isolate* const isolate = CcTest::i_isolate();
+  HandleScope scope(isolate);
+  RandomNumberGenerator* const rng = isolate->random_number_generator();
+  Assembler assm(isolate, nullptr, 0);
+  __ uxth(r1, r1);
+  __ str(r1, MemOperand(r0));
+  __ bx(lr);
+  CodeDesc desc;
+  assm.GetCode(&desc);
+  Handle<Code> code = isolate->factory()->NewCode(
+      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
+#ifdef OBJECT_PRINT
+  code->Print(std::cout);
+#endif
+  F3 f = FUNCTION_CAST<F3>(code->entry());
+  for (size_t i = 0; i < 128; ++i) {
+    int32_t r, x = rng->NextInt();
+    Object* dummy = CALL_GENERATED_CODE(f, &r, x, 0, 0, 0);
+    CHECK_EQ(static_cast<int32_t>(static_cast<uint16_t>(x)), r);
+    USE(dummy);
+  }
+}
+
+
+TEST(uxtah) {
+  CcTest::InitializeVM();
+  Isolate* const isolate = CcTest::i_isolate();
+  HandleScope scope(isolate);
+  RandomNumberGenerator* const rng = isolate->random_number_generator();
+  Assembler assm(isolate, nullptr, 0);
+  __ uxtah(r1, r2, r1);
+  __ str(r1, MemOperand(r0));
+  __ bx(lr);
+  CodeDesc desc;
+  assm.GetCode(&desc);
+  Handle<Code> code = isolate->factory()->NewCode(
+      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
+#ifdef OBJECT_PRINT
+  code->Print(std::cout);
+#endif
+  F3 f = FUNCTION_CAST<F3>(code->entry());
+  for (size_t i = 0; i < 128; ++i) {
+    int32_t r, x = rng->NextInt(), y = rng->NextInt();
+    Object* dummy = CALL_GENERATED_CODE(f, &r, x, y, 0, 0);
+    CHECK_EQ(static_cast<int32_t>(static_cast<uint16_t>(x)) + y, r);
+    USE(dummy);
+  }
+}
+
+
 TEST(code_relative_offset) {
   // Test extracting the offset of a label from the beginning of the code
   // in a register.
   CcTest::InitializeVM();
   Isolate* isolate = CcTest::i_isolate();
   HandleScope scope(isolate);
   // Initialize a code object that will contain the code.
   Handle<Object> code_object(isolate->heap()->undefined_value(), isolate);
 
   Assembler assm(isolate, NULL, 0);
@@ skipping 147 matching lines @@
     CHECK_VRINT(inf, inf, inf, inf, inf, inf)
     CHECK_VRINT(-inf, -inf, -inf, -inf, -inf, -inf)
     CHECK_VRINT(-0.0, -0.0, -0.0, -0.0, -0.0, -0.0)
     double nan = std::numeric_limits<double>::quiet_NaN();
     CHECK_VRINT(nan, nan, nan, nan, nan, nan)
 
 #undef CHECK_VRINT
   }
 }
 #undef __