commit 4b4553340dded4e8ce8f56690c08561a39a4aa56
author Aart Bik <ajcbik@google.com> Wed Mar 15 11:19:35 2017 -0700
committer Aart Bik <ajcbik@google.com> Wed Mar 15 11:46:19 2017 -0700
tree c52382b7b1b48ab23bf906ea87cff062acf0d320
parent ba05290bb69e6bc9750d2485cd3dbfb013e61412

SIMD cmpeq for x86/x86_64

Rationale:
Break-out CL of ART Vectorizer.
Enables fast all-ones optimization.

Bug: 34083438
Test: assembler_x86[_64]_test
Change-Id: I70bd71305f2ecc322ccada5471c197a578c0526e

compiler/utils/x86/assembler_x86.cc

diff --git a/compiler/utils/x86/assembler_x86.cc b/compiler/utils/x86/assembler_x86.cc
index 0a6ceef..5307dc0 100644
--- a/compiler/utils/x86/assembler_x86.cc
+++ b/compiler/utils/x86/assembler_x86.cc
@@ -1221,6 +1221,43 @@
 }
 
 
+void X86Assembler::pcmpeqb(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x74);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+
+void X86Assembler::pcmpeqw(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x75);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+
+void X86Assembler::pcmpeqd(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x76);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+
+void X86Assembler::pcmpeqq(XmmRegister dst, XmmRegister src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x66);
+  EmitUint8(0x0F);
+  EmitUint8(0x38);
+  EmitUint8(0x29);
+  EmitXmmRegisterOperand(dst, src);
+}
+
+
 void X86Assembler::shufpd(XmmRegister dst, XmmRegister src, const Immediate& imm) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   EmitUint8(0x66);

compiler/utils/x86/assembler_x86.h

diff --git a/compiler/utils/x86/assembler_x86.h b/compiler/utils/x86/assembler_x86.h
index 9d7ca77..f52cf16 100644
--- a/compiler/utils/x86/assembler_x86.h
+++ b/compiler/utils/x86/assembler_x86.h
@@ -495,6 +495,11 @@
   void orps(XmmRegister dst, XmmRegister src);
   void por(XmmRegister dst, XmmRegister src);
 
+  void pcmpeqb(XmmRegister dst, XmmRegister src);
+  void pcmpeqw(XmmRegister dst, XmmRegister src);
+  void pcmpeqd(XmmRegister dst, XmmRegister src);
+  void pcmpeqq(XmmRegister dst, XmmRegister src);
+
   void shufpd(XmmRegister dst, XmmRegister src, const Immediate& imm);
   void shufps(XmmRegister dst, XmmRegister src, const Immediate& imm);
   void pshufd(XmmRegister dst, XmmRegister src, const Immediate& imm);

compiler/utils/x86/assembler_x86_test.cc

diff --git a/compiler/utils/x86/assembler_x86_test.cc b/compiler/utils/x86/assembler_x86_test.cc
index 52c7507..2304907 100644
--- a/compiler/utils/x86/assembler_x86_test.cc
+++ b/compiler/utils/x86/assembler_x86_test.cc
@@ -605,6 +605,22 @@
   DriverStr(RepeatFF(&x86::X86Assembler::por, "por %{reg2}, %{reg1}"), "por");
 }
 
+TEST_F(AssemblerX86Test, PCmpeqB) {
+  DriverStr(RepeatFF(&x86::X86Assembler::pcmpeqb, "pcmpeqb %{reg2}, %{reg1}"), "cmpeqb");
+}
+
+TEST_F(AssemblerX86Test, PCmpeqW) {
+  DriverStr(RepeatFF(&x86::X86Assembler::pcmpeqw, "pcmpeqw %{reg2}, %{reg1}"), "cmpeqw");
+}
+
+TEST_F(AssemblerX86Test, PCmpeqD) {
+  DriverStr(RepeatFF(&x86::X86Assembler::pcmpeqd, "pcmpeqd %{reg2}, %{reg1}"), "cmpeqd");
+}
+
+TEST_F(AssemblerX86Test, PCmpeqQ) {
+  DriverStr(RepeatFF(&x86::X86Assembler::pcmpeqq, "pcmpeqq %{reg2}, %{reg1}"), "cmpeqq");
+}
+
 TEST_F(AssemblerX86Test, ShufPS) {
   DriverStr(RepeatFFI(&x86::X86Assembler::shufps, 1, "shufps ${imm}, %{reg2}, %{reg1}"), "shufps");
 }