[arm] Implement I64Atomic operations on Arm

 - Implement all the I64Atomic operations on ARM
 - Change assembler methods to use Registers instead of memory operands
 - Move atomics64 test up be tested on all archs, disable tests on MIPS

BUG:v8:6532

Change-Id: I91bd42fa819f194be15c719266c36230f9c65db8
Reviewed-on: https://chromium-review.googlesource.com/1180211
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Reviewed-by: Bill Budge <bbudge@chromium.org>
Reviewed-by: Ben Smith <binji@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55416}

src/arm/assembler-arm.cc

@@ -2240,29 +2240,27 @@ void Assembler::strexh(Register src1, Register src2, Register dst,
        0xF9 * B4 | src2.code());
 }
 
-void Assembler::ldrexd(Register dst1, Register dst2, const MemOperand& src,
+void Assembler::ldrexd(Register dst1, Register dst2, Register src,
                        Condition cond) {
   // cond(31-28) | 00011011(27-20) | Rn(19-16) | Rt(15-12) | 111110011111(11-0)
-  DCHECK(src.rm() == no_reg);
   DCHECK(dst1 != lr);  // r14.
   // The pair of destination registers is restricted to being an even-numbered
   // register and the odd-numbered register that immediately follows it.
   DCHECK_EQ(0, dst1.code() % 2);
   DCHECK_EQ(dst1.code() + 1, dst2.code());
-  emit(cond | B24 | B23 | B21 | B20 | src.rn_.code() * B16 | dst1.code() * B12 |
+  emit(cond | B24 | B23 | B21 | B20 | src.code() * B16 | dst1.code() * B12 |
        0xF9F);
 }
 
-void Assembler::strexd(Register res, Register src1, Register src2,
-                       const MemOperand& dst, Condition cond) {
+void Assembler::strexd(Register res, Register src1, Register src2, Register dst,
+                       Condition cond) {
   // cond(31-28) | 00011010(27-20) | Rn(19-16) | Rt(15-12) | 111110011111(11-0)
-  DCHECK(dst.rm() == no_reg);
   DCHECK(src1 != lr);  // r14.
   // The pair of source registers is restricted to being an even-numbered
   // register and the odd-numbered register that immediately follows it.
   DCHECK_EQ(0, src1.code() % 2);
   DCHECK_EQ(src1.code() + 1, src2.code());
-  emit(cond | B24 | B23 | B21 | dst.rn_.code() * B16 | res.code() * B12 |
+  emit(cond | B24 | B23 | B21 | dst.code() * B16 | res.code() * B12 |
        0xF9 * B4 | src1.code());
 }
 

src/arm/assembler-arm.h

@@ -930,9 +930,8 @@ class V8_EXPORT_PRIVATE Assembler : public AssemblerBase {
   void strexb(Register src1, Register src2, Register dst, Condition cond = al);
   void ldrexh(Register dst, Register src, Condition cond = al);
   void strexh(Register src1, Register src2, Register dst, Condition cond = al);
-  void ldrexd(Register dst1, Register dst2, const MemOperand& src,
-              Condition cond = al);
-  void strexd(Register res, Register src1, Register src2, const MemOperand& dst,
+  void ldrexd(Register dst1, Register dst2, Register src, Condition cond = al);
+  void strexd(Register res, Register src1, Register src2, Register dst,
               Condition cond = al);
 
   // Preload instructions

src/compiler/arm/instruction-scheduler-arm.cc

@@ -264,6 +264,7 @@ int InstructionScheduler::GetTargetInstructionFlags(
     case kArmLdrsh:
     case kArmLdr:
     case kArmPeek:
+    case kArmWord32AtomicPairLoad:
       return kIsLoadOperation;
 
     case kArmVstrF32:
@@ -276,6 +277,35 @@ int InstructionScheduler::GetTargetInstructionFlags(
     case kArmPush:
     case kArmPoke:
     case kArmDsbIsb:
+    case kArmWord32AtomicPairStore:
+    case kArmWord32AtomicPairAdd:
+    case kArmWord32AtomicPairSub:
+    case kArmWord32AtomicPairAnd:
+    case kArmWord32AtomicPairOr:
+    case kArmWord32AtomicPairXor:
+    case kArmWord32AtomicPairExchange:
+    case kArmWord32AtomicPairCompareExchange:
+    case kArmWord64AtomicNarrowAddUint8:
+    case kArmWord64AtomicNarrowAddUint16:
+    case kArmWord64AtomicNarrowAddUint32:
+    case kArmWord64AtomicNarrowSubUint8:
+    case kArmWord64AtomicNarrowSubUint16:
+    case kArmWord64AtomicNarrowSubUint32:
+    case kArmWord64AtomicNarrowAndUint8:
+    case kArmWord64AtomicNarrowAndUint16:
+    case kArmWord64AtomicNarrowAndUint32:
+    case kArmWord64AtomicNarrowOrUint8:
+    case kArmWord64AtomicNarrowOrUint16:
+    case kArmWord64AtomicNarrowOrUint32:
+    case kArmWord64AtomicNarrowXorUint8:
+    case kArmWord64AtomicNarrowXorUint16:
+    case kArmWord64AtomicNarrowXorUint32:
+    case kArmWord64AtomicNarrowExchangeUint8:
+    case kArmWord64AtomicNarrowExchangeUint16:
+    case kArmWord64AtomicNarrowExchangeUint32:
+    case kArmWord64AtomicNarrowCompareExchangeUint8:
+    case kArmWord64AtomicNarrowCompareExchangeUint16:
+    case kArmWord64AtomicNarrowCompareExchangeUint32:
       return kHasSideEffect;
 
 #define CASE(Name) case k##Name:

src/compiler/instruction-selector.cc

@@ -2389,7 +2389,7 @@ void InstructionSelector::VisitWord32PairShr(Node* node) { UNIMPLEMENTED(); }
 void InstructionSelector::VisitWord32PairSar(Node* node) { UNIMPLEMENTED(); }
 #endif  // V8_TARGET_ARCH_64_BIT
 
-#if !V8_TARGET_ARCH_IA32
+#if !V8_TARGET_ARCH_IA32 && !V8_TARGET_ARCH_ARM
 void InstructionSelector::VisitWord32AtomicPairLoad(Node* node) {
   UNIMPLEMENTED();
 }
@@ -2453,7 +2453,7 @@ void InstructionSelector::VisitWord64AtomicNarrowExchange(Node* node) {
 void InstructionSelector::VisitWord64AtomicNarrowCompareExchange(Node* node) {
   UNIMPLEMENTED();
 }
-#endif  // !V8_TARGET_ARCH_IA32
+#endif  // !V8_TARGET_ARCH_IA32 && !V8_TARGET_ARCH_ARM
 
 #if !V8_TARGET_ARCH_ARM && !V8_TARGET_ARCH_ARM64 && !V8_TARGET_ARCH_MIPS && \
     !V8_TARGET_ARCH_MIPS64 && !V8_TARGET_ARCH_IA32

test/cctest/BUILD.gn

@@ -243,6 +243,7 @@ v8_source_set("cctest_sources") {
     "wasm/test-run-wasm-64.cc",
     "wasm/test-run-wasm-asmjs.cc",
     "wasm/test-run-wasm-atomics.cc",
+    "wasm/test-run-wasm-atomics64.cc",
     "wasm/test-run-wasm-interpreter.cc",
     "wasm/test-run-wasm-js.cc",
     "wasm/test-run-wasm-module.cc",
@@ -299,7 +300,6 @@ v8_source_set("cctest_sources") {
       "test-sync-primitives-arm64.cc",
       "test-utils-arm64.cc",
       "test-utils-arm64.h",
-      "wasm/test-run-wasm-atomics64.cc",
     ]
   } else if (v8_current_cpu == "x86") {
     sources += [  ### gcmole(arch:ia32) ###
@@ -309,7 +309,6 @@ v8_source_set("cctest_sources") {
       "test-code-stubs.h",
       "test-disasm-ia32.cc",
       "test-log-stack-tracer.cc",
-      "wasm/test-run-wasm-atomics64.cc",
     ]
   } else if (v8_current_cpu == "mips") {
     sources += [  ### gcmole(arch:mips) ###
@@ -356,7 +355,6 @@ v8_source_set("cctest_sources") {
       "test-disasm-x64.cc",
       "test-log-stack-tracer.cc",
       "test-macro-assembler-x64.cc",
-      "wasm/test-run-wasm-atomics64.cc",
     ]
   } else if (v8_current_cpu == "ppc" || v8_current_cpu == "ppc64") {
     sources += [  ### gcmole(arch:ppc) ###

test/cctest/cctest.status

@@ -344,6 +344,12 @@
   'test-run-wasm-simd/RunWasm_ReductionTest16_compiled': [SKIP],
 }],  # '(arch == mipsel or arch == mips64el or arch == mips or arch == mips64) and not simd_mips'
 
+##############################################################################
+['arch == mipsel or arch == mips64el or arch == mips or arch == mips64', {
+  # TODO(mips-team): Implement I64Atomic operations on MIPS
+  'test-run-wasm-atomics64/*': [SKIP],
+}],  # 'arch == mipsel or arch == mips64el or arch == mips or arch == mips64'
+
 ##############################################################################
 ['mips_arch_variant == r6', {
   # For MIPS[64] architecture release 6, fusion multiply-accumulate instructions

test/cctest/test-disasm-arm.cc

@@ -1615,8 +1615,8 @@ TEST(LoadStoreExclusive) {
   COMPARE(strexh(r0, r1, r2), "e1e20f91       strexh r0, r1, [r2]");
   COMPARE(ldrex(r0, r1), "e1910f9f       ldrex r0, [r1]");
   COMPARE(strex(r0, r1, r2), "e1820f91       strex r0, r1, [r2]");
-  COMPARE(ldrexd(r0, r1, MemOperand(r2)), "e1b20f9f       ldrexd r0, [r2]");
-  COMPARE(strexd(r0, r2, r3, MemOperand(r4)),
+  COMPARE(ldrexd(r0, r1, r2), "e1b20f9f       ldrexd r0, [r2]");
+  COMPARE(strexd(r0, r2, r3, r4),
           "e1a40f92       strexd r0, r2, [r4]");
 
   VERIFY_RUN();