x86/x86_64: Add rep_movs instructions

x86: This patch adds rep_movsb with tests
x86_64: This patch adds rep_movsb, rep_movsl with tests

Test: $ANDROID_HOST_OUT/nativetest{64}/art_compiler_host_tests/art_compiler_host_tests
Signed-off-by: Shalini Salomi Bodapati <shalini.salomi.bodapati@intel.com>
Change-Id: Ie49434c88e690007bdb7e773f746eae66b197574

6 files changed, 37 insertions, 0 deletions

diff --git a/compiler/utils/x86/assembler_x86.cc b/compiler/utils/x86/assembler_x86.cc
index 4b64e92136..861b27e6af 100644
--- a/compiler/utils/x86/assembler_x86.cc
+++ b/compiler/utils/x86/assembler_x86.cc
@@ -3735,6 +3735,11 @@ void X86Assembler::rep_movsw() {
   EmitUint8(0xA5);
 }
 
+void X86Assembler::rep_movsl() {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF3);
+  EmitUint8(0xA5);
+}
 
 X86Assembler* X86Assembler::lock() {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
diff --git a/compiler/utils/x86/assembler_x86.h b/compiler/utils/x86/assembler_x86.h
index dc2427d9d9..c346ba9235 100644
--- a/compiler/utils/x86/assembler_x86.h
+++ b/compiler/utils/x86/assembler_x86.h
@@ -871,6 +871,7 @@ class X86Assembler final : public Assembler {
   void repe_cmpsw();
   void repe_cmpsl();
   void rep_movsb();
+  void rep_movsl();
   void rep_movsw();
 
   X86Assembler* lock();
diff --git a/compiler/utils/x86/assembler_x86_test.cc b/compiler/utils/x86/assembler_x86_test.cc
index 5db2b65179..89c73c0ade 100644
--- a/compiler/utils/x86/assembler_x86_test.cc
+++ b/compiler/utils/x86/assembler_x86_test.cc
@@ -464,6 +464,12 @@ TEST_F(AssemblerX86Test, RepMovsw) {
   DriverStr(expected, "rep_movsw");
 }
 
+TEST_F(AssemblerX86Test, RepMovsl) {
+  GetAssembler()->rep_movsl();
+  const char* expected = "rep movsl\n";
+  DriverStr(expected, "rep_movsl");
+}
+
 TEST_F(AssemblerX86Test, Blsmask) {
   DriverStr(RepeatRR(&x86::X86Assembler::blsmsk, "blsmsk %{reg2}, %{reg1}"), "blsmsk");
 }
diff --git a/compiler/utils/x86_64/assembler_x86_64.cc b/compiler/utils/x86_64/assembler_x86_64.cc
index 966d9e4e7e..21a44810ba 100644
--- a/compiler/utils/x86_64/assembler_x86_64.cc
+++ b/compiler/utils/x86_64/assembler_x86_64.cc
@@ -4981,6 +4981,17 @@ void X86_64Assembler::rep_movsw() {
   EmitUint8(0xA5);
 }
 
+void X86_64Assembler::rep_movsb() {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF3);
+  EmitUint8(0xA4);
+}
+
+void X86_64Assembler::rep_movsl() {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0xF3);
+  EmitUint8(0xA5);
+}
 
 X86_64Assembler* X86_64Assembler::lock() {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
diff --git a/compiler/utils/x86_64/assembler_x86_64.h b/compiler/utils/x86_64/assembler_x86_64.h
index 7d61500d07..ea944c200e 100644
--- a/compiler/utils/x86_64/assembler_x86_64.h
+++ b/compiler/utils/x86_64/assembler_x86_64.h
@@ -981,6 +981,8 @@ class X86_64Assembler final : public Assembler {
   void repe_cmpsl();
   void repe_cmpsq();
   void rep_movsw();
+  void rep_movsb();
+  void rep_movsl();
 
   void ud2();
 
diff --git a/compiler/utils/x86_64/assembler_x86_64_test.cc b/compiler/utils/x86_64/assembler_x86_64_test.cc
index 53febca629..f7e890d112 100644
--- a/compiler/utils/x86_64/assembler_x86_64_test.cc
+++ b/compiler/utils/x86_64/assembler_x86_64_test.cc
@@ -1226,12 +1226,24 @@ TEST_F(AssemblerX86_64Test, RepneScasw) {
   DriverStr(expected, "repne_scasw");
 }
 
+TEST_F(AssemblerX86_64Test, RepMovsb) {
+  GetAssembler()->rep_movsb();
+  const char* expected = "rep movsb\n";
+  DriverStr(expected, "rep_movsb");
+}
+
 TEST_F(AssemblerX86_64Test, RepMovsw) {
   GetAssembler()->rep_movsw();
   const char* expected = "rep movsw\n";
   DriverStr(expected, "rep_movsw");
 }
 
+TEST_F(AssemblerX86_64Test, RepMovsl) {
+  GetAssembler()->rep_movsl();
+  const char* expected = "rep movsl\n";
+  DriverStr(expected, "rep_movsl");
+}
+
 TEST_F(AssemblerX86_64Test, Movsxd) {
   DriverStr(RepeatRr(&x86_64::X86_64Assembler::movsxd, "movslq %{reg2}, %{reg1}"), "movsxd");
 }