[wasm][liftoff] Implement atomic.fence

R=clemensb@chromium.org

Bug: v8:10108
Change-Id: I3bdb4c2abe0b1db1babec370921463dbdfcd0a32
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2074403
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66544}

src/wasm/baseline/arm/liftoff-assembler-arm.h

@@ -582,6 +582,8 @@ void LiftoffAssembler::AtomicXor(Register dst_addr, Register offset_reg,
   bailout(kAtomics, "AtomicXor");
 }
 
+void LiftoffAssembler::AtomicFence() { dmb(ISH); }
+
 void LiftoffAssembler::LoadCallerFrameSlot(LiftoffRegister dst,
                                            uint32_t caller_slot_idx,
                                            ValueType type) {

src/wasm/baseline/arm64/liftoff-assembler-arm64.h

@@ -382,6 +382,8 @@ void LiftoffAssembler::AtomicXor(Register dst_addr, Register offset_reg,
   bailout(kAtomics, "AtomicXor");
 }
 
+void LiftoffAssembler::AtomicFence() { Dmb(InnerShareable, BarrierAll); }
+
 void LiftoffAssembler::LoadCallerFrameSlot(LiftoffRegister dst,
                                            uint32_t caller_slot_idx,
                                            ValueType type) {

src/wasm/baseline/ia32/liftoff-assembler-ia32.h

@@ -519,6 +519,8 @@ void LiftoffAssembler::AtomicXor(Register dst_addr, Register offset_reg,
   bailout(kAtomics, "AtomicXor");
 }
 
+void LiftoffAssembler::AtomicFence() { mfence(); }
+
 void LiftoffAssembler::LoadCallerFrameSlot(LiftoffRegister dst,
                                            uint32_t caller_slot_idx,
                                            ValueType type) {

src/wasm/baseline/liftoff-assembler.h

@@ -465,6 +465,8 @@ class LiftoffAssembler : public TurboAssembler {
                         uint32_t offset_imm, LiftoffRegister result,
                         StoreType type);
 
+  inline void AtomicFence();
+
   inline void LoadCallerFrameSlot(LiftoffRegister, uint32_t caller_slot_idx,
                                   ValueType);
   inline void MoveStackValue(uint32_t dst_offset, uint32_t src_offset,

src/wasm/baseline/liftoff-compiler.cc

@@ -2564,9 +2564,7 @@ class LiftoffCompiler {
 #undef ATOMIC_LOAD_LIST
 #undef ATOMIC_BINOP_INSTRUCTION_LIST
 
-  void AtomicFence(FullDecoder* decoder) {
-    unsupported(decoder, kAtomics, "atomic.fence");
-  }
+  void AtomicFence(FullDecoder* decoder) { __ AtomicFence(); }
   void MemoryInit(FullDecoder* decoder,
                   const MemoryInitImmediate<validate>& imm, const Value& dst,
                   const Value& src, const Value& size) {

src/wasm/baseline/mips/liftoff-assembler-mips.h

@@ -568,6 +568,8 @@ void LiftoffAssembler::AtomicXor(Register dst_addr, Register offset_reg,
   bailout(kAtomics, "AtomicXor");
 }
 
+void LiftoffAssembler::AtomicFence() { sync(); }
+
 void LiftoffAssembler::LoadCallerFrameSlot(LiftoffRegister dst,
                                            uint32_t caller_slot_idx,
                                            ValueType type) {

src/wasm/baseline/mips64/liftoff-assembler-mips64.h

@@ -484,6 +484,8 @@ void LiftoffAssembler::AtomicXor(Register dst_addr, Register offset_reg,
   bailout(kAtomics, "AtomicXor");
 }
 
+void LiftoffAssembler::AtomicFence() { sync(); }
+
 void LiftoffAssembler::LoadCallerFrameSlot(LiftoffRegister dst,
                                            uint32_t caller_slot_idx,
                                            ValueType type) {

src/wasm/baseline/ppc/liftoff-assembler-ppc.h

@@ -170,6 +170,8 @@ void LiftoffAssembler::AtomicXor(Register dst_addr, Register offset_reg,
   bailout(kAtomics, "AtomicXor");
 }
 
+void LiftoffAssembler::AtomicFence() { sync(); }
+
 void LiftoffAssembler::LoadCallerFrameSlot(LiftoffRegister dst,
                                            uint32_t caller_slot_idx,
                                            ValueType type) {

src/wasm/baseline/s390/liftoff-assembler-s390.h

@@ -169,6 +169,8 @@ void LiftoffAssembler::AtomicXor(Register dst_addr, Register offset_reg,
   bailout(kAtomics, "AtomicXor");
 }
 
+void LiftoffAssembler::AtomicFence() { bailout(kAtomics, "AtomicFence"); }
+
 void LiftoffAssembler::LoadCallerFrameSlot(LiftoffRegister dst,
                                            uint32_t caller_slot_idx,
                                            ValueType type) {

src/wasm/baseline/x64/liftoff-assembler-x64.h

@@ -573,6 +573,8 @@ void LiftoffAssembler::AtomicXor(Register dst_addr, Register offset_reg,
                        offset_reg, offset_imm, value, type);
 }
 
+void LiftoffAssembler::AtomicFence() { mfence(); }
+
 void LiftoffAssembler::LoadCallerFrameSlot(LiftoffRegister dst,
                                            uint32_t caller_slot_idx,
                                            ValueType type) {