Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 210 insertions, 0 deletions

diff --git a/js/src/jit/riscv64/CodeGenerator-riscv64.h b/js/src/jit/riscv64/CodeGenerator-riscv64.h
new file mode 100644
index 0000000000..793c834085
--- /dev/null
+++ b/js/src/jit/riscv64/CodeGenerator-riscv64.h
@@ -0,0 +1,210 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef jit_riscv64_CodeGenerator_riscv64_h
+#define jit_riscv64_CodeGenerator_riscv64_h
+
+#include "jit/riscv64/Assembler-riscv64.h"
+#include "jit/riscv64/MacroAssembler-riscv64.h"
+#include "jit/shared/CodeGenerator-shared.h"
+
+namespace js {
+namespace jit {
+
+class CodeGeneratorRiscv64;
+class OutOfLineBailout;
+class OutOfLineTableSwitch;
+
+using OutOfLineWasmTruncateCheck =
+    OutOfLineWasmTruncateCheckBase<CodeGeneratorRiscv64>;
+
+class CodeGeneratorRiscv64 : public CodeGeneratorShared {
+  friend class MoveResolverLA;
+
+ protected:
+  CodeGeneratorRiscv64(MIRGenerator* gen, LIRGraph* graph,
+                       MacroAssembler* masm);
+
+  NonAssertingLabel deoptLabel_;
+
+  Operand ToOperand(const LAllocation& a);
+  Operand ToOperand(const LAllocation* a);
+  Operand ToOperand(const LDefinition* def);
+
+#ifdef JS_PUNBOX64
+  Operand ToOperandOrRegister64(const LInt64Allocation input);
+#else
+  Register64 ToOperandOrRegister64(const LInt64Allocation input);
+#endif
+
+  MoveOperand toMoveOperand(LAllocation a) const;
+
+  template <typename T1, typename T2>
+  void bailoutCmp32(Assembler::Condition c, T1 lhs, T2 rhs,
+                    LSnapshot* snapshot) {
+    Label bail;
+    masm.branch32(c, lhs, rhs, &bail);
+    bailoutFrom(&bail, snapshot);
+  }
+  template <typename T1, typename T2>
+  void bailoutTest32(Assembler::Condition c, T1 lhs, T2 rhs,
+                     LSnapshot* snapshot) {
+    Label bail;
+    masm.branchTest32(c, lhs, rhs, &bail);
+    bailoutFrom(&bail, snapshot);
+  }
+  template <typename T1, typename T2>
+  void bailoutCmpPtr(Assembler::Condition c, T1 lhs, T2 rhs,
+                     LSnapshot* snapshot) {
+    Label bail;
+    masm.branchPtr(c, lhs, rhs, &bail);
+    bailoutFrom(&bail, snapshot);
+  }
+  void bailoutTestPtr(Assembler::Condition c, Register lhs, Register rhs,
+                      LSnapshot* snapshot) {
+    // TODO(riscv64) Didn't use branchTestPtr due to '-Wundefined-inline'.
+    MOZ_ASSERT(c == Assembler::Zero || c == Assembler::NonZero ||
+               c == Assembler::Signed || c == Assembler::NotSigned);
+    Label bail;
+    if (lhs == rhs) {
+      masm.ma_b(lhs, rhs, &bail, c);
+    } else {
+      ScratchRegisterScope scratch(masm);
+      masm.and_(scratch, lhs, rhs);
+      masm.ma_b(scratch, scratch, &bail, c);
+    }
+    bailoutFrom(&bail, snapshot);
+  }
+  void bailoutIfFalseBool(Register reg, LSnapshot* snapshot) {
+    Label bail;
+    ScratchRegisterScope scratch(masm);
+    masm.ma_and(scratch, reg, Imm32(0xFF));
+    masm.ma_b(scratch, scratch, &bail, Assembler::Zero);
+    bailoutFrom(&bail, snapshot);
+  }
+
+  void bailoutFrom(Label* label, LSnapshot* snapshot);
+  void bailout(LSnapshot* snapshot);
+
+  bool generateOutOfLineCode();
+
+  template <typename T>
+  void branchToBlock(Register lhs, T rhs, MBasicBlock* mir,
+                     Assembler::Condition cond) {
+    masm.ma_b(lhs, rhs, skipTrivialBlocks(mir)->lir()->label(), cond);
+  }
+  void branchToBlock(FloatFormat fmt, FloatRegister lhs, FloatRegister rhs,
+                     MBasicBlock* mir, Assembler::DoubleCondition cond);
+
+  // Emits a branch that directs control flow to the true block if |cond| is
+  // true, and the false block if |cond| is false.
+  template <typename T>
+  void emitBranch(Register lhs, T rhs, Assembler::Condition cond,
+                  MBasicBlock* mirTrue, MBasicBlock* mirFalse) {
+    if (isNextBlock(mirFalse->lir())) {
+      branchToBlock(lhs, rhs, mirTrue, cond);
+    } else {
+      branchToBlock(lhs, rhs, mirFalse, Assembler::InvertCondition(cond));
+      jumpToBlock(mirTrue);
+    }
+  }
+  void testZeroEmitBranch(Assembler::Condition cond, Register reg,
+                          MBasicBlock* ifTrue, MBasicBlock* ifFalse) {
+    emitBranch(reg, Imm32(0), cond, ifTrue, ifFalse);
+  }
+
+  void emitTableSwitchDispatch(MTableSwitch* mir, Register index,
+                               Register base);
+
+  template <typename T>
+  void emitWasmLoad(T* ins);
+  template <typename T>
+  void emitWasmStore(T* ins);
+
+  void generateInvalidateEpilogue();
+
+  // Generating a result.
+  template <typename S, typename T>
+  void atomicBinopToTypedIntArray(AtomicOp op, Scalar::Type arrayType,
+                                  const S& value, const T& mem,
+                                  Register flagTemp, Register outTemp,
+                                  Register valueTemp, Register offsetTemp,
+                                  Register maskTemp, AnyRegister output);
+
+  // Generating no result.
+  template <typename S, typename T>
+  void atomicBinopToTypedIntArray(AtomicOp op, Scalar::Type arrayType,
+                                  const S& value, const T& mem,
+                                  Register flagTemp, Register valueTemp,
+                                  Register offsetTemp, Register maskTemp);
+
+ public:
+  // Out of line visitors.
+  void visitOutOfLineBailout(OutOfLineBailout* ool);
+  void visitOutOfLineTableSwitch(OutOfLineTableSwitch* ool);
+  void visitOutOfLineWasmTruncateCheck(OutOfLineWasmTruncateCheck* ool);
+
+ protected:
+  void testNullEmitBranch(Assembler::Condition cond, const ValueOperand& value,
+                          MBasicBlock* ifTrue, MBasicBlock* ifFalse) {
+    UseScratchRegisterScope temps(&masm);
+    Register scratch = temps.Acquire();
+    masm.splitTag(value.valueReg(), scratch);
+    emitBranch(scratch, ImmTag(JSVAL_TAG_NULL), cond, ifTrue, ifFalse);
+  }
+  void testUndefinedEmitBranch(Assembler::Condition cond,
+                               const ValueOperand& value, MBasicBlock* ifTrue,
+                               MBasicBlock* ifFalse) {
+    UseScratchRegisterScope temps(&masm);
+    Register scratch = temps.Acquire();
+    masm.splitTag(value.valueReg(), scratch);
+    emitBranch(scratch, ImmTag(JSVAL_TAG_UNDEFINED), cond, ifTrue, ifFalse);
+  }
+  void testObjectEmitBranch(Assembler::Condition cond,
+                            const ValueOperand& value, MBasicBlock* ifTrue,
+                            MBasicBlock* ifFalse) {
+    UseScratchRegisterScope temps(&masm);
+    Register scratch = temps.Acquire();
+    masm.splitTag(value.valueReg(), scratch);
+    emitBranch(scratch, ImmTag(JSVAL_TAG_OBJECT), cond, ifTrue, ifFalse);
+  }
+
+  void emitBigIntDiv(LBigIntDiv* ins, Register dividend, Register divisor,
+                     Register output, Label* fail);
+  void emitBigIntMod(LBigIntMod* ins, Register dividend, Register divisor,
+                     Register output, Label* fail);
+
+  template <typename T>
+  void emitWasmLoadI64(T* ins);
+  template <typename T>
+  void emitWasmStoreI64(T* ins);
+
+  ValueOperand ToValue(LInstruction* ins, size_t pos);
+  ValueOperand ToTempValue(LInstruction* ins, size_t pos);
+
+  // Functions for LTestVAndBranch.
+  void splitTagForTest(const ValueOperand& value, ScratchTagScope& tag);
+};
+
+typedef CodeGeneratorRiscv64 CodeGeneratorSpecific;
+
+// An out-of-line bailout thunk.
+class OutOfLineBailout : public OutOfLineCodeBase<CodeGeneratorRiscv64> {
+ protected:
+  LSnapshot* snapshot_;
+
+ public:
+  OutOfLineBailout(LSnapshot* snapshot) : snapshot_(snapshot) {}
+
+  void accept(CodeGeneratorRiscv64* codegen) override;
+
+  LSnapshot* snapshot() const { return snapshot_; }
+};
+
+}  // namespace jit
+}  // namespace js
+
+#endif /* jit_riscv64_CodeGenerator_riscv64_h */