Introduce xchgl, orl, roll, subl, testl and xorl into X64 assembler

R=danno@chromium.org

Review URL: https://codereview.chromium.org/26780004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17352 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/x64/assembler-x64.cc

@@ -1897,7 +1897,7 @@ void Assembler::shrd(Register dst, Register src) {
 }
 
 
-void Assembler::xchg(Register dst, Register src) {
+void Assembler::xchgq(Register dst, Register src) {
   EnsureSpace ensure_space(this);
   if (src.is(rax) || dst.is(rax)) {  // Single-byte encoding
     Register other = src.is(rax) ? dst : src;
@@ -1915,6 +1915,24 @@ void Assembler::xchg(Register dst, Register src) {
 }
 
 
+void Assembler::xchgl(Register dst, Register src) {
+  EnsureSpace ensure_space(this);
+  if (src.is(rax) || dst.is(rax)) {  // Single-byte encoding
+    Register other = src.is(rax) ? dst : src;
+    emit_optional_rex_32(other);
+    emit(0x90 | other.low_bits());
+  } else if (dst.low_bits() == 4) {
+    emit_optional_rex_32(dst, src);
+    emit(0x87);
+    emit_modrm(dst, src);
+  } else {
+    emit_optional_rex_32(src, dst);
+    emit(0x87);
+    emit_modrm(src, dst);
+  }
+}
+
+
 void Assembler::store_rax(void* dst, RelocInfo::Mode mode) {
   EnsureSpace ensure_space(this);
   emit(0x48);  // REX.W
@@ -2033,6 +2051,14 @@ void Assembler::testl(const Operand& op, Immediate mask) {
 }
 
 
+void Assembler::testl(const Operand& op, Register reg) {
+  EnsureSpace ensure_space(this);
+  emit_optional_rex_32(reg, op);
+  emit(0x85);
+  emit_operand(reg, op);
+}
+
+
 void Assembler::testq(const Operand& op, Register reg) {
   EnsureSpace ensure_space(this);
   emit_rex_64(reg, op);

src/x64/assembler-x64.h

@@ -755,7 +755,8 @@ class Assembler : public AssemblerBase {
   void cmovl(Condition cc, Register dst, const Operand& src);
 
   // Exchange two registers
-  void xchg(Register dst, Register src);
+  void xchgq(Register dst, Register src);
+  void xchgl(Register dst, Register src);
 
   // Arithmetics
   void addl(Register dst, Register src) {
@@ -990,6 +991,10 @@ class Assembler : public AssemblerBase {
     arithmetic_op(0x09, src, dst);
   }
 
+  void orl(const Operand& dst, Register src) {
+    arithmetic_op_32(0x09, src, dst);
+  }
+
   void or_(Register dst, Immediate src) {
     immediate_arithmetic_op(0x1, dst, src);
   }
@@ -1015,6 +1020,10 @@ class Assembler : public AssemblerBase {
     shift(dst, imm8, 0x0);
   }
 
+  void roll(Register dst, Immediate imm8) {
+    shift_32(dst, imm8, 0x0);
+  }
+
   void rcr(Register dst, Immediate imm8) {
     shift(dst, imm8, 0x3);
   }
@@ -1122,6 +1131,10 @@ class Assembler : public AssemblerBase {
     arithmetic_op_32(0x2B, dst, src);
   }
 
+  void subl(const Operand& dst, Register src) {
+    arithmetic_op_32(0x29, src, dst);
+  }
+
   void subl(const Operand& dst, Immediate src) {
     immediate_arithmetic_op_32(0x5, dst, src);
   }
@@ -1140,6 +1153,7 @@ class Assembler : public AssemblerBase {
   void testb(const Operand& op, Register reg);
   void testl(Register dst, Register src);
   void testl(Register reg, Immediate mask);
+  void testl(const Operand& op, Register reg);
   void testl(const Operand& op, Immediate mask);
   void testq(const Operand& op, Register reg);
   void testq(Register dst, Register src);
@@ -1165,6 +1179,10 @@ class Assembler : public AssemblerBase {
     immediate_arithmetic_op_32(0x6, dst, src);
   }
 
+  void xorl(const Operand& dst, Register src) {
+    arithmetic_op_32(0x31, src, dst);
+  }
+
   void xorl(const Operand& dst, Immediate src) {
     immediate_arithmetic_op_32(0x6, dst, src);
   }

src/x64/lithium-gap-resolver-x64.cc

@@ -262,7 +262,7 @@ void LGapResolver::EmitSwap(int index) {
     // Swap two general-purpose registers.
     Register src = cgen_->ToRegister(source);
     Register dst = cgen_->ToRegister(destination);
-    __ xchg(dst, src);
+    __ xchgq(dst, src);
 
   } else if ((source->IsRegister() && destination->IsStackSlot()) ||
              (source->IsStackSlot() && destination->IsRegister())) {

test/cctest/test-assembler-x64.cc

@@ -51,6 +51,8 @@ typedef int (*F0)();
 typedef int (*F1)(int64_t x);
 typedef int (*F2)(int64_t x, int64_t y);
 typedef int (*F3)(double x);
+typedef int64_t (*F4)(int64_t* x, int64_t* y);
+typedef int64_t (*F5)(int64_t x);
 
 #ifdef _WIN64
 static const Register arg1 = rcx;
@@ -167,6 +169,157 @@ TEST(AssemblerX64ImulOperation) {
 }
 
 
+TEST(AssemblerX64XchglOperations) {
+  // Allocate an executable page of memory.
+  size_t actual_size;
+  byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
+                                                 &actual_size,
+                                                 true));
+  CHECK(buffer);
+  Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
+
+  __ movq(rax, Operand(arg1, 0));
+  __ movq(rbx, Operand(arg2, 0));
+  __ xchgl(rax, rbx);
+  __ movq(Operand(arg1, 0), rax);
+  __ movq(Operand(arg2, 0), rbx);
+  __ ret(0);
+
+  CodeDesc desc;
+  assm.GetCode(&desc);
+  // Call the function from C++.
+  int64_t left   = V8_2PART_UINT64_C(0x10000000, 20000000);
+  int64_t right  = V8_2PART_UINT64_C(0x30000000, 40000000);
+  int64_t result = FUNCTION_CAST<F4>(buffer)(&left, &right);
+  CHECK_EQ(V8_2PART_UINT64_C(0x00000000, 40000000), left);
+  CHECK_EQ(V8_2PART_UINT64_C(0x00000000, 20000000), right);
+  USE(result);
+}
+
+
+TEST(AssemblerX64OrlOperations) {
+  // Allocate an executable page of memory.
+  size_t actual_size;
+  byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
+                                                 &actual_size,
+                                                 true));
+  CHECK(buffer);
+  Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
+
+  __ movq(rax, Operand(arg2, 0));
+  __ orl(Operand(arg1, 0), rax);
+  __ ret(0);
+
+  CodeDesc desc;
+  assm.GetCode(&desc);
+  // Call the function from C++.
+  int64_t left   = V8_2PART_UINT64_C(0x10000000, 20000000);
+  int64_t right  = V8_2PART_UINT64_C(0x30000000, 40000000);
+  int64_t result = FUNCTION_CAST<F4>(buffer)(&left, &right);
+  CHECK_EQ(V8_2PART_UINT64_C(0x10000000, 60000000), left);
+  USE(result);
+}
+
+
+TEST(AssemblerX64RollOperations) {
+  // Allocate an executable page of memory.
+  size_t actual_size;
+  byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
+                                                 &actual_size,
+                                                 true));
+  CHECK(buffer);
+  Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
+
+  __ movq(rax, arg1);
+  __ roll(rax, Immediate(1));
+  __ ret(0);
+
+  CodeDesc desc;
+  assm.GetCode(&desc);
+  // Call the function from C++.
+  int64_t src    = V8_2PART_UINT64_C(0x10000000, C0000000);
+  int64_t result = FUNCTION_CAST<F5>(buffer)(src);
+  CHECK_EQ(V8_2PART_UINT64_C(0x00000000, 80000001), result);
+}
+
+
+TEST(AssemblerX64SublOperations) {
+  // Allocate an executable page of memory.
+  size_t actual_size;
+  byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
+                                                 &actual_size,
+                                                 true));
+  CHECK(buffer);
+  Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
+
+  __ movq(rax, Operand(arg2, 0));
+  __ subl(Operand(arg1, 0), rax);
+  __ ret(0);
+
+  CodeDesc desc;
+  assm.GetCode(&desc);
+  // Call the function from C++.
+  int64_t left   = V8_2PART_UINT64_C(0x10000000, 20000000);
+  int64_t right  = V8_2PART_UINT64_C(0x30000000, 40000000);
+  int64_t result = FUNCTION_CAST<F4>(buffer)(&left, &right);
+  CHECK_EQ(V8_2PART_UINT64_C(0x10000000, e0000000), left);
+  USE(result);
+}
+
+
+TEST(AssemblerX64TestlOperations) {
+  // Allocate an executable page of memory.
+  size_t actual_size;
+  byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
+                                                 &actual_size,
+                                                 true));
+  CHECK(buffer);
+  Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
+
+  // Set rax with the ZF flag of the testl instruction.
+  Label done;
+  __ movq(rax, Immediate(1));
+  __ movq(rbx, Operand(arg2, 0));
+  __ testl(Operand(arg1, 0), rbx);
+  __ j(zero, &done, Label::kNear);
+  __ movq(rax, Immediate(0));
+  __ bind(&done);
+  __ ret(0);
+
+  CodeDesc desc;
+  assm.GetCode(&desc);
+  // Call the function from C++.
+  int64_t left   = V8_2PART_UINT64_C(0x10000000, 20000000);
+  int64_t right  = V8_2PART_UINT64_C(0x30000000, 00000000);
+  int64_t result = FUNCTION_CAST<F4>(buffer)(&left, &right);
+  CHECK_EQ(static_cast<int64_t>(1), result);
+}
+
+
+TEST(AssemblerX64XorlOperations) {
+  // Allocate an executable page of memory.
+  size_t actual_size;
+  byte* buffer = static_cast<byte*>(OS::Allocate(Assembler::kMinimalBufferSize,
+                                                 &actual_size,
+                                                 true));
+  CHECK(buffer);
+  Assembler assm(CcTest::i_isolate(), buffer, static_cast<int>(actual_size));
+
+  __ movq(rax, Operand(arg2, 0));
+  __ xorl(Operand(arg1, 0), rax);
+  __ ret(0);
+
+  CodeDesc desc;
+  assm.GetCode(&desc);
+  // Call the function from C++.
+  int64_t left   = V8_2PART_UINT64_C(0x10000000, 20000000);
+  int64_t right  = V8_2PART_UINT64_C(0x30000000, 60000000);
+  int64_t result = FUNCTION_CAST<F4>(buffer)(&left, &right);
+  CHECK_EQ(V8_2PART_UINT64_C(0x10000000, 40000000), left);
+  USE(result);
+}
+
+
 TEST(AssemblerX64MemoryOperands) {
   // Allocate an executable page of memory.
   size_t actual_size;