Contribution of PowerPC port.

test/cctest/test-assembler-ppc.cc

Index: test/cctest/test-assembler-ppc.cc
diff --git a/test/cctest/test-assembler-ppc.cc b/test/cctest/test-assembler-ppc.cc
new file mode 100644
index 0000000000000000000000000000000000000000..928796ef58296ec8e59af80fc68a88791ab53aec
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+++ b/test/cctest/test-assembler-ppc.cc
@@ -0,0 +1,1069 @@
+// 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
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "src/v8.h"
+
+#include "src/disassembler.h"
+#include "src/factory.h"
+#include "src/ppc/assembler-ppc-inl.h"
+#include "src/ppc/simulator-ppc.h"
+#include "test/cctest/cctest.h"
+
+using namespace v8::internal;
+
+
+// Define these function prototypes to match JSEntryFunction in execution.cc.
+typedef Object* (*F1)(int x, int p1, int p2, int p3, int p4);
+typedef Object* (*F2)(int x, int y, int p2, int p3, int p4);
+typedef Object* (*F3)(void* p0, int p1, int p2, int p3, int p4);
+typedef Object* (*F4)(void* p0, void* p1, int p2, int p3, int p4);
+
+
+#define __ assm.
+
+// Simple add parameter 1 to parameter 2 and return
+TEST(0) {
+  CcTest::InitializeVM();
+  Isolate* isolate = Isolate::Current();
+  HandleScope scope(isolate);
+
+  Assembler assm(isolate, NULL, 0);
+
+#if ABI_USES_FUNCTION_DESCRIPTORS
+  __ function_descriptor();
+#endif
+
+  __ add(r3, r3, r4);
+  __ blr();
+
+  CodeDesc desc;
+  assm.GetCode(&desc);
+  Handle<Code> code = isolate->factory()->NewCode(
+      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
+#ifdef DEBUG
+  code->Print();
+#endif
+  F2 f = FUNCTION_CAST<F2>(code->entry());
+  intptr_t res =
+    reinterpret_cast<intptr_t>(CALL_GENERATED_CODE(f, 3, 4, 0, 0, 0));
+  ::printf("f() = %" V8PRIdPTR "\n", res);
+  CHECK_EQ(7, static_cast<int>(res));
+}
+
+
+// Loop 100 times, adding loop counter to result
+TEST(1) {
+  CcTest::InitializeVM();
+  Isolate* isolate = Isolate::Current();
+  HandleScope scope(isolate);
+
+  Assembler assm(isolate, NULL, 0);
+  Label L, C;
+
+#if ABI_USES_FUNCTION_DESCRIPTORS
+  __ function_descriptor();
+#endif
+
+  __ mr(r4, r3);
+  __ li(r3, Operand::Zero());
+  __ b(&C);
+
+  __ bind(&L);
+  __ add(r3, r3, r4);
+  __ subi(r4, r4, Operand(1));
+
+  __ bind(&C);
+  __ cmpi(r4, Operand::Zero());
+  __ bne(&L);
+  __ blr();
+
+  CodeDesc desc;
+  assm.GetCode(&desc);
+  Handle<Code> code = isolate->factory()->NewCode(
+      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
+#ifdef DEBUG
+  code->Print();
+#endif
+  F1 f = FUNCTION_CAST<F1>(code->entry());
+  intptr_t res =
+    reinterpret_cast<intptr_t>(CALL_GENERATED_CODE(f, 100, 0, 0, 0, 0));
+  ::printf("f() = %" V8PRIdPTR  "\n", res);
+  CHECK_EQ(5050, static_cast<int>(res));
+}
+
+
+TEST(2) {
+  CcTest::InitializeVM();
+  Isolate* isolate = Isolate::Current();
+  HandleScope scope(isolate);
+
+  Assembler assm(isolate, NULL, 0);
+  Label L, C;
+
+#if ABI_USES_FUNCTION_DESCRIPTORS
+  __ function_descriptor();
+#endif
+
+  __ mr(r4, r3);
+  __ li(r3, Operand(1));
+  __ b(&C);
+
+  __ bind(&L);
+#if defined(V8_TARGET_ARCH_PPC64)
+  __ mulld(r3, r4, r3);
+#else
+  __ mullw(r3, r4, r3);
+#endif
+  __ subi(r4, r4, Operand(1));
+
+  __ bind(&C);
+  __ cmpi(r4, Operand::Zero());
+  __ bne(&L);
+  __ blr();
+
+  // some relocated stuff here, not executed
+  __ RecordComment("dead code, just testing relocations");
+  __ mov(r0, Operand(isolate->factory()->true_value()));
+  __ RecordComment("dead code, just testing immediate operands");
+  __ mov(r0, Operand(-1));
+  __ mov(r0, Operand(0xFF000000));
+  __ mov(r0, Operand(0xF0F0F0F0));
+  __ mov(r0, Operand(0xFFF0FFFF));
+
+  CodeDesc desc;
+  assm.GetCode(&desc);
+  Handle<Code> code = isolate->factory()->NewCode(
+      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
+#ifdef DEBUG
+  code->Print();
+#endif
+  F1 f = FUNCTION_CAST<F1>(code->entry());
+  intptr_t res =
+    reinterpret_cast<intptr_t>(CALL_GENERATED_CODE(f, 10, 0, 0, 0, 0));
+  ::printf("f() = %" V8PRIdPTR "\n", res);
+  CHECK_EQ(3628800, static_cast<int>(res));
+}
+
+
+
+TEST(3) {
+  CcTest::InitializeVM();
+  Isolate* isolate = Isolate::Current();
+  HandleScope scope(isolate);
+
+  typedef struct {
+    int i;
+    char c;
+    int16_t s;
+  } T;
+  T t;
+
+  Assembler assm(Isolate::Current(), NULL, 0);
+  Label L, C;
+
+#if ABI_USES_FUNCTION_DESCRIPTORS
+  __ function_descriptor();
+#endif
+
+  // build a frame
+#if V8_TARGET_ARCH_PPC64
+  __ stdu(sp, MemOperand(sp, -32));
+  __ std(fp, MemOperand(sp, 24));
+#else
+  __ stwu(sp, MemOperand(sp, -16));
+  __ stw(fp, MemOperand(sp, 12));
+#endif
+  __ mr(fp, sp);
+
+  // r4 points to our struct
+  __ mr(r4, r3);
+
+  // modify field int i of struct
+  __ lwz(r3, MemOperand(r4, OFFSET_OF(T, i)));
+  __ srwi(r5, r3, Operand(1));
+  __ stw(r5, MemOperand(r4, OFFSET_OF(T, i)));
+
+  // modify field char c of struct
+  __ lbz(r5, MemOperand(r4, OFFSET_OF(T, c)));
+  __ add(r3, r5, r3);
+  __ slwi(r5, r5, Operand(2));
+  __ stb(r5, MemOperand(r4, OFFSET_OF(T, c)));
+
+  // modify field int16_t s of struct
+  __ lhz(r5, MemOperand(r4, OFFSET_OF(T, s)));
+  __ add(r3, r5, r3);
+  __ srwi(r5, r5, Operand(3));
+  __ sth(r5, MemOperand(r4, OFFSET_OF(T, s)));
+
+  // restore frame
+#if V8_TARGET_ARCH_PPC64
+  __ addi(r11, fp, Operand(32));
+  __ ld(fp, MemOperand(r11, -8));
+#else
+  __ addi(r11, fp, Operand(16));
+  __ lwz(fp, MemOperand(r11, -4));
+#endif
+  __ mr(sp, r11);
+  __ blr();
+
+  CodeDesc desc;
+  assm.GetCode(&desc);
+  Handle<Code> code = isolate->factory()->NewCode(
+      desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
+#ifdef DEBUG
+  code->Print();
+#endif
+  F3 f = FUNCTION_CAST<F3>(code->entry());
+  t.i = 100000;
+  t.c = 10;
+  t.s = 1000;
+  intptr_t res =
+    reinterpret_cast<intptr_t>(CALL_GENERATED_CODE(f, &t, 0, 0, 0, 0));
+  ::printf("f() = %" V8PRIdPTR "\n", res);
+  CHECK_EQ(101010, static_cast<int>(res));
+  CHECK_EQ(100000/2, t.i);
+  CHECK_EQ(10*4, t.c);
+  CHECK_EQ(1000/8, t.s);
+}
+
+#if 0
+TEST(4) {
+  // Test the VFP floating point instructions.
+  CcTest::InitializeVM();
+  Isolate* isolate = Isolate::Current();
+  HandleScope scope(isolate);
+
+  typedef struct {
+    double a;
+    double b;
+    double c;
+    double d;
+    double e;
+    double f;
+    double g;
+    double h;
+    int i;
+    double m;
+    double n;
+    float x;
+    float y;
+  } T;
+  T t;
+
+  // Create a function that accepts &t, and loads, manipulates, and stores
+  // the doubles and floats.
+  Assembler assm(Isolate::Current(), NULL, 0);
+  Label L, C;
+
+  if (CpuFeatures::IsSupported(VFP3)) {
+    CpuFeatures::Scope scope(VFP3);
+
+    __ mov(ip, Operand(sp));
+    __ stm(db_w, sp, r4.bit() | fp.bit() | lr.bit());
+    __ sub(fp, ip, Operand(4));
+
+    __ mov(r4, Operand(r0));
+    __ vldr(d6, r4, OFFSET_OF(T, a));
+    __ vldr(d7, r4, OFFSET_OF(T, b));
+    __ vadd(d5, d6, d7);
+    __ vstr(d5, r4, OFFSET_OF(T, c));
+
+    __ vmov(r2, r3, d5);
+    __ vmov(d4, r2, r3);
+    __ vstr(d4, r4, OFFSET_OF(T, b));
+
+    // Load t.x and t.y, switch values, and store back to the struct.
+    __ vldr(s0, r4, OFFSET_OF(T, x));
+    __ vldr(s31, r4, OFFSET_OF(T, y));
+    __ vmov(s16, s0);
+    __ vmov(s0, s31);
+    __ vmov(s31, s16);
+    __ vstr(s0, r4, OFFSET_OF(T, x));
+    __ vstr(s31, r4, OFFSET_OF(T, y));
+
+    // Move a literal into a register that can be encoded in the instruction.
+    __ vmov(d4, 1.0);
+    __ vstr(d4, r4, OFFSET_OF(T, e));
+
+    // Move a literal into a register that requires 64 bits to encode.
+    // 0x3ff0000010000000 = 1.000000059604644775390625
+    __ vmov(d4, 1.000000059604644775390625);
+    __ vstr(d4, r4, OFFSET_OF(T, d));
+
+    // Convert from floating point to integer.
+    __ vmov(d4, 2.0);
+    __ vcvt_s32_f64(s31, d4);
+    __ vstr(s31, r4, OFFSET_OF(T, i));
+
+    // Convert from integer to floating point.
+    __ mov(lr, Operand(42));
+    __ vmov(s31, lr);
+    __ vcvt_f64_s32(d4, s31);
+    __ vstr(d4, r4, OFFSET_OF(T, f));
+
+    // Test vabs.
+    __ vldr(d1, r4, OFFSET_OF(T, g));
+    __ vabs(d0, d1);
+    __ vstr(d0, r4, OFFSET_OF(T, g));
+    __ vldr(d2, r4, OFFSET_OF(T, h));
+    __ vabs(d0, d2);
+    __ vstr(d0, r4, OFFSET_OF(T, h));
+
+    // Test vneg.
+    __ vldr(d1, r4, OFFSET_OF(T, m));
+    __ vneg(d0, d1);
+    __ vstr(d0, r4, OFFSET_OF(T, m));
+    __ vldr(d1, r4, OFFSET_OF(T, n));
+    __ vneg(d0, d1);
+    __ vstr(d0, r4, OFFSET_OF(T, n));
+
+    __ ldm(ia_w, sp, r4.bit() | fp.bit() | pc.bit());
+
+    CodeDesc desc;
+    assm.GetCode(&desc);
+    Object* code = isolate->heap()->CreateCode(
+        desc,
+        Code::ComputeFlags(Code::STUB),
+        Handle<Code>())->ToObjectChecked();
+    CHECK(code->IsCode());
+#ifdef DEBUG
+    Code::cast(code)->Print();
+#endif
+    F3 f = FUNCTION_CAST<F3>(Code::cast(code)->entry());
+    t.a = 1.5;
+    t.b = 2.75;
+    t.c = 17.17;
+    t.d = 0.0;
+    t.e = 0.0;
+    t.f = 0.0;
+    t.g = -2718.2818;
+    t.h = 31415926.5;
+    t.i = 0;
+    t.m = -2718.2818;
+    t.n = 123.456;
+    t.x = 4.5;
+    t.y = 9.0;
+    Object* dummy = CALL_GENERATED_CODE(f, &t, 0, 0, 0, 0);
+    USE(dummy);
+    CHECK_EQ(4.5, t.y);
+    CHECK_EQ(9.0, t.x);
+    CHECK_EQ(-123.456, t.n);
+    CHECK_EQ(2718.2818, t.m);
+    CHECK_EQ(2, t.i);
+    CHECK_EQ(2718.2818, t.g);
+    CHECK_EQ(31415926.5, t.h);
+    CHECK_EQ(42.0, t.f);
+    CHECK_EQ(1.0, t.e);
+    CHECK_EQ(1.000000059604644775390625, t.d);
+    CHECK_EQ(4.25, t.c);
+    CHECK_EQ(4.25, t.b);
+    CHECK_EQ(1.5, t.a);
+  }
+}
+
+
+TEST(5) {
+  // Test the ARMv7 bitfield instructions.
+  CcTest::InitializeVM();
+  Isolate* isolate = Isolate::Current();
+  HandleScope scope(isolate);
+
+  Assembler assm(isolate, NULL, 0);
+
+  if (CpuFeatures::IsSupported(ARMv7)) {
+    CpuFeatures::Scope scope(ARMv7);
+    // On entry, r0 = 0xAAAAAAAA = 0b10..10101010.
+    __ ubfx(r0, r0, 1, 12);  // 0b00..010101010101 = 0x555
+    __ sbfx(r0, r0, 0, 5);   // 0b11..111111110101 = -11
+    __ bfc(r0, 1, 3);        // 0b11..111111110001 = -15
+    __ mov(r1, Operand(7));
+    __ bfi(r0, r1, 3, 3);    // 0b11..111111111001 = -7
+    __ mov(pc, Operand(lr));
+
+    CodeDesc desc;
+    assm.GetCode(&desc);
+    Object* code = isolate->heap()->CreateCode(
+        desc,
+        Code::ComputeFlags(Code::STUB),
+        Handle<Code>())->ToObjectChecked();
+    CHECK(code->IsCode());
+#ifdef DEBUG
+    Code::cast(code)->Print();
+#endif
+    F1 f = FUNCTION_CAST<F1>(Code::cast(code)->entry());
+    int res = reinterpret_cast<int>(
+                CALL_GENERATED_CODE(f, 0xAAAAAAAA, 0, 0, 0, 0));
+    ::printf("f() = %d\n", res);
+    CHECK_EQ(-7, res);
+  }
+}
+
+
+TEST(6) {
+  // Test saturating instructions.
+  CcTest::InitializeVM();
+  Isolate* isolate = Isolate::Current();
+  HandleScope scope(isolate);
+
+  Assembler assm(isolate, NULL, 0);
+
+  if (CpuFeatures::IsSupported(ARMv7)) {
+    CpuFeatures::Scope scope(ARMv7);
+    __ usat(r1, 8, Operand(r0));           // Sat 0xFFFF to 0-255 = 0xFF.
+    __ usat(r2, 12, Operand(r0, ASR, 9));  // Sat (0xFFFF>>9) to 0-4095 = 0x7F.
+    __ usat(r3, 1, Operand(r0, LSL, 16));  // Sat (0xFFFF<<16) to 0-1 = 0x0.
+    __ addi(r0, r1, Operand(r2));
+    __ addi(r0, r0, Operand(r3));
+    __ mov(pc, Operand(lr));
+
+    CodeDesc desc;
+    assm.GetCode(&desc);
+    Object* code = isolate->heap()->CreateCode(
+        desc,
+        Code::ComputeFlags(Code::STUB),
+        Handle<Code>())->ToObjectChecked();
+    CHECK(code->IsCode());
+#ifdef DEBUG
+    Code::cast(code)->Print();
+#endif
+    F1 f = FUNCTION_CAST<F1>(Code::cast(code)->entry());
+    int res = reinterpret_cast<int>(
+                CALL_GENERATED_CODE(f, 0xFFFF, 0, 0, 0, 0));
+    ::printf("f() = %d\n", res);
+    CHECK_EQ(382, res);
+  }
+}
+
+enum VCVTTypes {
+  s32_f64,
+  u32_f64
+};
+
+static void TestRoundingMode(VCVTTypes types,
+                             VFPRoundingMode mode,
+                             double value,
+                             int expected,
+                             bool expected_exception = false) {
+  CcTest::InitializeVM();
+  Isolate* isolate = Isolate::Current();
+  HandleScope scope(isolate);
+
+  Assembler assm(isolate, NULL, 0);
+
+  if (CpuFeatures::IsSupported(VFP3)) {
+    CpuFeatures::Scope scope(VFP3);
+
+    Label wrong_exception;
+
+    __ vmrs(r1);
+    // Set custom FPSCR.
+    __ bic(r2, r1, Operand(kVFPRoundingModeMask | kVFPExceptionMask));
+    __ orr(r2, r2, Operand(mode));
+    __ vmsr(r2);
+
+    // Load value, convert, and move back result to r0 if everything went well.
+    __ vmov(d1, value);
+    switch (types) {
+      case s32_f64:
+        __ vcvt_s32_f64(s0, d1, kFPSCRRounding);
+        break;
+
+      case u32_f64:
+        __ vcvt_u32_f64(s0, d1, kFPSCRRounding);
+        break;
+
+      default:
+        UNREACHABLE();
+        break;
+    }
+    // Check for vfp exceptions
+    __ vmrs(r2);
+    __ tst(r2, Operand(kVFPExceptionMask));
+    // Check that we behaved as expected.
+    __ b(&wrong_exception,
+         expected_exception ? eq : ne);
+    // There was no exception. Retrieve the result and return.
+    __ vmov(r0, s0);
+    __ mov(pc, Operand(lr));
+
+    // The exception behaviour is not what we expected.
+    // Load a special value and return.
+    __ bind(&wrong_exception);
+    __ mov(r0, Operand(11223344));
+    __ mov(pc, Operand(lr));
+
+    CodeDesc desc;
+    assm.GetCode(&desc);
+    Object* code = isolate->heap()->CreateCode(
+        desc,
+        Code::ComputeFlags(Code::STUB),
+        Handle<Code>())->ToObjectChecked();
+    CHECK(code->IsCode());
+#ifdef DEBUG
+    Code::cast(code)->Print();
+#endif
+    F1 f = FUNCTION_CAST<F1>(Code::cast(code)->entry());
+    int res = reinterpret_cast<int>(
+                CALL_GENERATED_CODE(f, 0, 0, 0, 0, 0));
+    ::printf("res = %d\n", res);
+    CHECK_EQ(expected, res);
+  }
+}
+
+
+TEST(7) {
+  // Test vfp rounding modes.
+
+  // s32_f64 (double to integer).
+
+  TestRoundingMode(s32_f64, RN,  0, 0);
+  TestRoundingMode(s32_f64, RN,  0.5, 0);
+  TestRoundingMode(s32_f64, RN, -0.5, 0);
+  TestRoundingMode(s32_f64, RN,  1.5, 2);
+  TestRoundingMode(s32_f64, RN, -1.5, -2);
+  TestRoundingMode(s32_f64, RN,  123.7, 124);
+  TestRoundingMode(s32_f64, RN, -123.7, -124);
+  TestRoundingMode(s32_f64, RN,  123456.2,  123456);
+  TestRoundingMode(s32_f64, RN, -123456.2, -123456);
+  TestRoundingMode(s32_f64, RN, static_cast<double>(kMaxInt), kMaxInt);
+  TestRoundingMode(s32_f64, RN, (kMaxInt + 0.49), kMaxInt);
+  TestRoundingMode(s32_f64, RN, (kMaxInt + 1.0), kMaxInt, true);
+  TestRoundingMode(s32_f64, RN, (kMaxInt + 0.5), kMaxInt, true);
+  TestRoundingMode(s32_f64, RN, static_cast<double>(kMinInt), kMinInt);
+  TestRoundingMode(s32_f64, RN, (kMinInt - 0.5), kMinInt);
+  TestRoundingMode(s32_f64, RN, (kMinInt - 1.0), kMinInt, true);
+  TestRoundingMode(s32_f64, RN, (kMinInt - 0.51), kMinInt, true);
+
+  TestRoundingMode(s32_f64, RM,  0, 0);
+  TestRoundingMode(s32_f64, RM,  0.5, 0);
+  TestRoundingMode(s32_f64, RM, -0.5, -1);
+  TestRoundingMode(s32_f64, RM,  123.7, 123);
+  TestRoundingMode(s32_f64, RM, -123.7, -124);
+  TestRoundingMode(s32_f64, RM,  123456.2,  123456);
+  TestRoundingMode(s32_f64, RM, -123456.2, -123457);
+  TestRoundingMode(s32_f64, RM, static_cast<double>(kMaxInt), kMaxInt);
+  TestRoundingMode(s32_f64, RM, (kMaxInt + 0.5), kMaxInt);
+  TestRoundingMode(s32_f64, RM, (kMaxInt + 1.0), kMaxInt, true);
+  TestRoundingMode(s32_f64, RM, static_cast<double>(kMinInt), kMinInt);
+  TestRoundingMode(s32_f64, RM, (kMinInt - 0.5), kMinInt, true);
+  TestRoundingMode(s32_f64, RM, (kMinInt + 0.5), kMinInt);
+
+  TestRoundingMode(s32_f64, RZ,  0, 0);
+  TestRoundingMode(s32_f64, RZ,  0.5, 0);
+  TestRoundingMode(s32_f64, RZ, -0.5, 0);
+  TestRoundingMode(s32_f64, RZ,  123.7,  123);
+  TestRoundingMode(s32_f64, RZ, -123.7, -123);
+  TestRoundingMode(s32_f64, RZ,  123456.2,  123456);
+  TestRoundingMode(s32_f64, RZ, -123456.2, -123456);
+  TestRoundingMode(s32_f64, RZ, static_cast<double>(kMaxInt), kMaxInt);
+  TestRoundingMode(s32_f64, RZ, (kMaxInt + 0.5), kMaxInt);
+  TestRoundingMode(s32_f64, RZ, (kMaxInt + 1.0), kMaxInt, true);
+  TestRoundingMode(s32_f64, RZ, static_cast<double>(kMinInt), kMinInt);
+  TestRoundingMode(s32_f64, RZ, (kMinInt - 0.5), kMinInt);
+  TestRoundingMode(s32_f64, RZ, (kMinInt - 1.0), kMinInt, true);
+
+
+  // u32_f64 (double to integer).
+
+  // Negative values.
+  TestRoundingMode(u32_f64, RN, -0.5, 0);
+  TestRoundingMode(u32_f64, RN, -123456.7, 0, true);
+  TestRoundingMode(u32_f64, RN, static_cast<double>(kMinInt), 0, true);
+  TestRoundingMode(u32_f64, RN, kMinInt - 1.0, 0, true);
+
+  TestRoundingMode(u32_f64, RM, -0.5, 0, true);
+  TestRoundingMode(u32_f64, RM, -123456.7, 0, true);
+  TestRoundingMode(u32_f64, RM, static_cast<double>(kMinInt), 0, true);
+  TestRoundingMode(u32_f64, RM, kMinInt - 1.0, 0, true);
+
+  TestRoundingMode(u32_f64, RZ, -0.5, 0);
+  TestRoundingMode(u32_f64, RZ, -123456.7, 0, true);
+  TestRoundingMode(u32_f64, RZ, static_cast<double>(kMinInt), 0, true);
+  TestRoundingMode(u32_f64, RZ, kMinInt - 1.0, 0, true);
+
+  // Positive values.
+  // kMaxInt is the maximum *signed* integer: 0x7fffffff.
+  static const uint32_t kMaxUInt = 0xffffffffu;
+  TestRoundingMode(u32_f64, RZ,  0, 0);
+  TestRoundingMode(u32_f64, RZ,  0.5, 0);
+  TestRoundingMode(u32_f64, RZ,  123.7,  123);
+  TestRoundingMode(u32_f64, RZ,  123456.2,  123456);
+  TestRoundingMode(u32_f64, RZ, static_cast<double>(kMaxInt), kMaxInt);
+  TestRoundingMode(u32_f64, RZ, (kMaxInt + 0.5), kMaxInt);
+  TestRoundingMode(u32_f64, RZ, (kMaxInt + 1.0),
+                                static_cast<uint32_t>(kMaxInt) + 1);
+  TestRoundingMode(u32_f64, RZ, (kMaxUInt + 0.5), kMaxUInt);
+  TestRoundingMode(u32_f64, RZ, (kMaxUInt + 1.0), kMaxUInt, true);
+
+  TestRoundingMode(u32_f64, RM,  0, 0);
+  TestRoundingMode(u32_f64, RM,  0.5, 0);
+  TestRoundingMode(u32_f64, RM,  123.7, 123);
+  TestRoundingMode(u32_f64, RM,  123456.2,  123456);
+  TestRoundingMode(u32_f64, RM, static_cast<double>(kMaxInt), kMaxInt);
+  TestRoundingMode(u32_f64, RM, (kMaxInt + 0.5), kMaxInt);
+  TestRoundingMode(u32_f64, RM, (kMaxInt + 1.0),
+                                static_cast<uint32_t>(kMaxInt) + 1);
+  TestRoundingMode(u32_f64, RM, (kMaxUInt + 0.5), kMaxUInt);
+  TestRoundingMode(u32_f64, RM, (kMaxUInt + 1.0), kMaxUInt, true);
+
+  TestRoundingMode(u32_f64, RN,  0, 0);
+  TestRoundingMode(u32_f64, RN,  0.5, 0);
+  TestRoundingMode(u32_f64, RN,  1.5, 2);
+  TestRoundingMode(u32_f64, RN,  123.7, 124);
+  TestRoundingMode(u32_f64, RN,  123456.2,  123456);
+  TestRoundingMode(u32_f64, RN, static_cast<double>(kMaxInt), kMaxInt);
+  TestRoundingMode(u32_f64, RN, (kMaxInt + 0.49), kMaxInt);
+  TestRoundingMode(u32_f64, RN, (kMaxInt + 0.5),
+                                static_cast<uint32_t>(kMaxInt) + 1);
+  TestRoundingMode(u32_f64, RN, (kMaxUInt + 0.49), kMaxUInt);
+  TestRoundingMode(u32_f64, RN, (kMaxUInt + 0.5), kMaxUInt, true);
+  TestRoundingMode(u32_f64, RN, (kMaxUInt + 1.0), kMaxUInt, true);
+}
+
+
+TEST(8) {
+  // Test VFP multi load/store with ia_w.
+  CcTest::InitializeVM();
+  Isolate* isolate = Isolate::Current();
+  HandleScope scope(isolate);
+
+  typedef struct {
+    double a;
+    double b;
+    double c;
+    double d;
+    double e;
+    double f;
+    double g;
+    double h;
+  } D;
+  D d;
+
+  typedef struct {
+    float a;
+    float b;
+    float c;
+    float d;
+    float e;
+    float f;
+    float g;
+    float h;
+  } F;
+  F f;
+
+  // Create a function that uses vldm/vstm to move some double and
+  // single precision values around in memory.
+  Assembler assm(isolate, NULL, 0);
+
+  if (CpuFeatures::IsSupported(VFP2)) {
+    CpuFeatures::Scope scope(VFP2);
+
+    __ mov(ip, Operand(sp));
+    __ stm(db_w, sp, r4.bit() | fp.bit() | lr.bit());
+    __ sub(fp, ip, Operand(4));
+
+    __ addi(r4, r0, Operand(OFFSET_OF(D, a)));
+    __ vldm(ia_w, r4, d0, d3);
+    __ vldm(ia_w, r4, d4, d7);
+
+    __ addi(r4, r0, Operand(OFFSET_OF(D, a)));
+    __ vstm(ia_w, r4, d6, d7);
+    __ vstm(ia_w, r4, d0, d5);
+
+    __ addi(r4, r1, Operand(OFFSET_OF(F, a)));
+    __ vldm(ia_w, r4, s0, s3);
+    __ vldm(ia_w, r4, s4, s7);
+
+    __ addi(r4, r1, Operand(OFFSET_OF(F, a)));
+    __ vstm(ia_w, r4, s6, s7);
+    __ vstm(ia_w, r4, s0, s5);
+
+    __ ldm(ia_w, sp, r4.bit() | fp.bit() | pc.bit());
+
+    CodeDesc desc;
+    assm.GetCode(&desc);
+    Object* code = isolate->heap()->CreateCode(
+        desc,
+        Code::ComputeFlags(Code::STUB),
+        Handle<Code>())->ToObjectChecked();
+    CHECK(code->IsCode());
+#ifdef DEBUG
+    Code::cast(code)->Print();
+#endif
+    F4 fn = FUNCTION_CAST<F4>(Code::cast(code)->entry());
+    d.a = 1.1;
+    d.b = 2.2;
+    d.c = 3.3;
+    d.d = 4.4;
+    d.e = 5.5;
+    d.f = 6.6;
+    d.g = 7.7;
+    d.h = 8.8;
+
+    f.a = 1.0;
+    f.b = 2.0;
+    f.c = 3.0;
+    f.d = 4.0;
+    f.e = 5.0;
+    f.f = 6.0;
+    f.g = 7.0;
+    f.h = 8.0;
+
+    Object* dummy = CALL_GENERATED_CODE(fn, &d, &f, 0, 0, 0);
+    USE(dummy);
+
+    CHECK_EQ(7.7, d.a);
+    CHECK_EQ(8.8, d.b);
+    CHECK_EQ(1.1, d.c);
+    CHECK_EQ(2.2, d.d);
+    CHECK_EQ(3.3, d.e);
+    CHECK_EQ(4.4, d.f);
+    CHECK_EQ(5.5, d.g);
+    CHECK_EQ(6.6, d.h);
+
+    CHECK_EQ(7.0, f.a);
+    CHECK_EQ(8.0, f.b);
+    CHECK_EQ(1.0, f.c);
+    CHECK_EQ(2.0, f.d);
+    CHECK_EQ(3.0, f.e);
+    CHECK_EQ(4.0, f.f);
+    CHECK_EQ(5.0, f.g);
+    CHECK_EQ(6.0, f.h);
+  }
+}
+
+
+TEST(9) {
+  // Test VFP multi load/store with ia.
+  CcTest::InitializeVM();
+  Isolate* isolate = Isolate::Current();
+  HandleScope scope(isolate);
+
+  typedef struct {
+    double a;
+    double b;
+    double c;
+    double d;
+    double e;
+    double f;
+    double g;
+    double h;
+  } D;
+  D d;
+
+  typedef struct {
+    float a;
+    float b;
+    float c;
+    float d;
+    float e;
+    float f;
+    float g;
+    float h;
+  } F;
+  F f;
+
+  // Create a function that uses vldm/vstm to move some double and
+  // single precision values around in memory.
+  Assembler assm(isolate, NULL, 0);
+
+  if (CpuFeatures::IsSupported(VFP2)) {
+    CpuFeatures::Scope scope(VFP2);
+
+    __ mov(ip, Operand(sp));
+    __ stm(db_w, sp, r4.bit() | fp.bit() | lr.bit());
+    __ sub(fp, ip, Operand(4));
+
+    __ addi(r4, r0, Operand(OFFSET_OF(D, a)));
+    __ vldm(ia, r4, d0, d3);
+    __ addi(r4, r4, Operand(4 * 8));
+    __ vldm(ia, r4, d4, d7);
+
+    __ addi(r4, r0, Operand(OFFSET_OF(D, a)));
+    __ vstm(ia, r4, d6, d7);
+    __ addi(r4, r4, Operand(2 * 8));
+    __ vstm(ia, r4, d0, d5);
+
+    __ addi(r4, r1, Operand(OFFSET_OF(F, a)));
+    __ vldm(ia, r4, s0, s3);
+    __ addi(r4, r4, Operand(4 * 4));
+    __ vldm(ia, r4, s4, s7);
+
+    __ addi(r4, r1, Operand(OFFSET_OF(F, a)));
+    __ vstm(ia, r4, s6, s7);
+    __ addi(r4, r4, Operand(2 * 4));
+    __ vstm(ia, r4, s0, s5);
+
+    __ ldm(ia_w, sp, r4.bit() | fp.bit() | pc.bit());
+
+    CodeDesc desc;
+    assm.GetCode(&desc);
+    Object* code = isolate->heap()->CreateCode(
+        desc,
+        Code::ComputeFlags(Code::STUB),
+        Handle<Code>())->ToObjectChecked();
+    CHECK(code->IsCode());
+#ifdef DEBUG
+    Code::cast(code)->Print();
+#endif
+    F4 fn = FUNCTION_CAST<F4>(Code::cast(code)->entry());
+    d.a = 1.1;
+    d.b = 2.2;
+    d.c = 3.3;
+    d.d = 4.4;
+    d.e = 5.5;
+    d.f = 6.6;
+    d.g = 7.7;
+    d.h = 8.8;
+
+    f.a = 1.0;
+    f.b = 2.0;
+    f.c = 3.0;
+    f.d = 4.0;
+    f.e = 5.0;
+    f.f = 6.0;
+    f.g = 7.0;
+    f.h = 8.0;
+
+    Object* dummy = CALL_GENERATED_CODE(fn, &d, &f, 0, 0, 0);
+    USE(dummy);
+
+    CHECK_EQ(7.7, d.a);
+    CHECK_EQ(8.8, d.b);
+    CHECK_EQ(1.1, d.c);
+    CHECK_EQ(2.2, d.d);
+    CHECK_EQ(3.3, d.e);
+    CHECK_EQ(4.4, d.f);
+    CHECK_EQ(5.5, d.g);
+    CHECK_EQ(6.6, d.h);
+
+    CHECK_EQ(7.0, f.a);
+    CHECK_EQ(8.0, f.b);
+    CHECK_EQ(1.0, f.c);
+    CHECK_EQ(2.0, f.d);
+    CHECK_EQ(3.0, f.e);
+    CHECK_EQ(4.0, f.f);
+    CHECK_EQ(5.0, f.g);
+    CHECK_EQ(6.0, f.h);
+  }
+}
+
+
+TEST(10) {
+  // Test VFP multi load/store with db_w.
+  CcTest::InitializeVM();
+  Isolate* isolate = Isolate::Current();
+  HandleScope scope(isolate);
+
+  typedef struct {
+    double a;
+    double b;
+    double c;
+    double d;
+    double e;
+    double f;
+    double g;
+    double h;
+  } D;
+  D d;
+
+  typedef struct {
+    float a;
+    float b;
+    float c;
+    float d;
+    float e;
+    float f;
+    float g;
+    float h;
+  } F;
+  F f;
+
+  // Create a function that uses vldm/vstm to move some double and
+  // single precision values around in memory.
+  Assembler assm(isolate, NULL, 0);
+
+  if (CpuFeatures::IsSupported(VFP2)) {
+    CpuFeatures::Scope scope(VFP2);
+
+    __ mov(ip, Operand(sp));
+    __ stm(db_w, sp, r4.bit() | fp.bit() | lr.bit());
+    __ sub(fp, ip, Operand(4));
+
+    __ addi(r4, r0, Operand(OFFSET_OF(D, h) + 8));
+    __ vldm(db_w, r4, d4, d7);
+    __ vldm(db_w, r4, d0, d3);
+
+    __ addi(r4, r0, Operand(OFFSET_OF(D, h) + 8));
+    __ vstm(db_w, r4, d0, d5);
+    __ vstm(db_w, r4, d6, d7);
+
+    __ addi(r4, r1, Operand(OFFSET_OF(F, h) + 4));
+    __ vldm(db_w, r4, s4, s7);
+    __ vldm(db_w, r4, s0, s3);
+
+    __ addi(r4, r1, Operand(OFFSET_OF(F, h) + 4));
+    __ vstm(db_w, r4, s0, s5);
+    __ vstm(db_w, r4, s6, s7);
+
+    __ ldm(ia_w, sp, r4.bit() | fp.bit() | pc.bit());
+
+    CodeDesc desc;
+    assm.GetCode(&desc);
+    Object* code = isolate->heap()->CreateCode(
+        desc,
+        Code::ComputeFlags(Code::STUB),
+        Handle<Code>())->ToObjectChecked();
+    CHECK(code->IsCode());
+#ifdef DEBUG
+    Code::cast(code)->Print();
+#endif
+    F4 fn = FUNCTION_CAST<F4>(Code::cast(code)->entry());
+    d.a = 1.1;
+    d.b = 2.2;
+    d.c = 3.3;
+    d.d = 4.4;
+    d.e = 5.5;
+    d.f = 6.6;
+    d.g = 7.7;
+    d.h = 8.8;
+
+    f.a = 1.0;
+    f.b = 2.0;
+    f.c = 3.0;
+    f.d = 4.0;
+    f.e = 5.0;
+    f.f = 6.0;
+    f.g = 7.0;
+    f.h = 8.0;
+
+    Object* dummy = CALL_GENERATED_CODE(fn, &d, &f, 0, 0, 0);
+    USE(dummy);
+
+    CHECK_EQ(7.7, d.a);
+    CHECK_EQ(8.8, d.b);
+    CHECK_EQ(1.1, d.c);
+    CHECK_EQ(2.2, d.d);
+    CHECK_EQ(3.3, d.e);
+    CHECK_EQ(4.4, d.f);
+    CHECK_EQ(5.5, d.g);
+    CHECK_EQ(6.6, d.h);
+
+    CHECK_EQ(7.0, f.a);
+    CHECK_EQ(8.0, f.b);
+    CHECK_EQ(1.0, f.c);
+    CHECK_EQ(2.0, f.d);
+    CHECK_EQ(3.0, f.e);
+    CHECK_EQ(4.0, f.f);
+    CHECK_EQ(5.0, f.g);
+    CHECK_EQ(6.0, f.h);
+  }
+}
+
+
+TEST(11) {
+  // Test instructions using the carry flag.
+  CcTest::InitializeVM();
+  Isolate* isolate = Isolate::Current();
+  HandleScope scope(isolate);
+
+  typedef struct {
+    int32_t a;
+    int32_t b;
+    int32_t c;
+    int32_t d;
+  } I;
+  I i;
+
+  i.a = 0xabcd0001;
+  i.b = 0xabcd0000;
+
+  Assembler assm(isolate, NULL, 0);
+
+  // Test HeapObject untagging.
+  __ ldr(r1, MemOperand(r0, OFFSET_OF(I, a)));
+  __ mov(r1, Operand(r1, ASR, 1), SetCC);
+  __ adc(r1, r1, Operand(r1), LeaveCC, cs);
+  __ str(r1, MemOperand(r0, OFFSET_OF(I, a)));
+
+  __ ldr(r2, MemOperand(r0, OFFSET_OF(I, b)));
+  __ mov(r2, Operand(r2, ASR, 1), SetCC);
+  __ adc(r2, r2, Operand(r2), LeaveCC, cs);
+  __ str(r2, MemOperand(r0, OFFSET_OF(I, b)));
+
+  // Test corner cases.
+  __ mov(r1, Operand(0xffffffff));
+  __ mov(r2, Operand::Zero());
+  __ mov(r3, Operand(r1, ASR, 1), SetCC);  // Set the carry.
+  __ adc(r3, r1, Operand(r2));
+  __ str(r3, MemOperand(r0, OFFSET_OF(I, c)));
+
+  __ mov(r1, Operand(0xffffffff));
+  __ mov(r2, Operand::Zero());
+  __ mov(r3, Operand(r2, ASR, 1), SetCC);  // Unset the carry.
+  __ adc(r3, r1, Operand(r2));
+  __ str(r3, MemOperand(r0, OFFSET_OF(I, d)));
+
+  __ mov(pc, Operand(lr));
+
+  CodeDesc desc;
+  assm.GetCode(&desc);
+  Object* code = isolate->heap()->CreateCode(
+      desc,
+      Code::ComputeFlags(Code::STUB),
+      Handle<Code>())->ToObjectChecked();
+  CHECK(code->IsCode());
+#ifdef DEBUG
+  Code::cast(code)->Print();
+#endif
+  F3 f = FUNCTION_CAST<F3>(Code::cast(code)->entry());
+  Object* dummy = CALL_GENERATED_CODE(f, &i, 0, 0, 0, 0);
+  USE(dummy);
+
+  CHECK_EQ(0xabcd0001, i.a);
+  CHECK_EQ(static_cast<int32_t>(0xabcd0000) >> 1, i.b);
+  CHECK_EQ(0x00000000, i.c);
+  CHECK_EQ(0xffffffff, i.d);
+}
+
+
+TEST(12) {
+  // Test chaining of label usages within instructions (issue 1644).
+  CcTest::InitializeVM();
+  Isolate* isolate = Isolate::Current();
+  HandleScope scope(isolate);
+
+  Assembler assm(isolate, NULL, 0);
+  Label target;
+  __ b(eq, &target);
+  __ b(ne, &target);
+  __ bind(&target);
+  __ nop();
+}
+#endif  // roohack
+
+#undef __