JavaScriptCore-7600.1.4.9.tar.gz

[apple/javascriptcore.git] / jit / RegisterSet.cpp

diff --git a/jit/RegisterSet.cpp b/jit/RegisterSet.cpp
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+/*
+ * Copyright (C) 2013, 2014 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "config.h"
+#include "RegisterSet.h"
+
+#if ENABLE(JIT)
+
+#include "GPRInfo.h"
+#include "MacroAssembler.h"
+#include "JSCInlines.h"
+#include <wtf/CommaPrinter.h>
+
+namespace JSC {
+
+RegisterSet RegisterSet::stackRegisters()
+{
+    return RegisterSet(
+        MacroAssembler::stackPointerRegister,
+        MacroAssembler::framePointerRegister);
+}
+
+RegisterSet RegisterSet::reservedHardwareRegisters()
+{
+#if CPU(ARM64)
+    return RegisterSet(ARM64Registers::lr);
+#else
+    return RegisterSet();
+#endif
+}
+
+RegisterSet RegisterSet::runtimeRegisters()
+{
+#if USE(JSVALUE64)
+    return RegisterSet(GPRInfo::tagTypeNumberRegister, GPRInfo::tagMaskRegister);
+#else
+    return RegisterSet();
+#endif
+}
+
+RegisterSet RegisterSet::specialRegisters()
+{
+    return RegisterSet(
+        stackRegisters(), reservedHardwareRegisters(), runtimeRegisters());
+}
+
+RegisterSet RegisterSet::calleeSaveRegisters()
+{
+    RegisterSet result;
+#if CPU(X86)
+    result.set(X86Registers::ebx);
+    result.set(X86Registers::ebp);
+    result.set(X86Registers::edi);
+    result.set(X86Registers::esi);
+#elif CPU(X86_64)
+    result.set(X86Registers::ebx);
+    result.set(X86Registers::ebp);
+    result.set(X86Registers::r12);
+    result.set(X86Registers::r13);
+    result.set(X86Registers::r14);
+    result.set(X86Registers::r15);
+#elif CPU(ARM_THUMB2)
+    result.set(ARMRegisters::r4);
+    result.set(ARMRegisters::r5);
+    result.set(ARMRegisters::r6);
+    result.set(ARMRegisters::r8);
+    result.set(ARMRegisters::r9);
+    result.set(ARMRegisters::r10);
+    result.set(ARMRegisters::r11);
+#elif CPU(ARM64)
+    // We don't include LR in the set of callee-save registers even though it technically belongs
+    // there. This is because we use this set to describe the set of registers that need to be saved
+    // beyond what you would save by the platform-agnostic "preserve return address" and "restore
+    // return address" operations in CCallHelpers.
+    for (
+        ARM64Registers::RegisterID reg = ARM64Registers::x19;
+        reg <= ARM64Registers::x28;
+        reg = static_cast<ARM64Registers::RegisterID>(reg + 1))
+        result.set(reg);
+    result.set(ARM64Registers::fp);
+    for (
+        ARM64Registers::FPRegisterID reg = ARM64Registers::q8;
+        reg <= ARM64Registers::q15;
+        reg = static_cast<ARM64Registers::FPRegisterID>(reg + 1))
+        result.set(reg);
+#else
+    UNREACHABLE_FOR_PLATFORM();
+#endif
+    return result;
+}
+
+RegisterSet RegisterSet::allGPRs()
+{
+    RegisterSet result;
+    for (MacroAssembler::RegisterID reg = MacroAssembler::firstRegister(); reg <= MacroAssembler::lastRegister(); reg = static_cast<MacroAssembler::RegisterID>(reg + 1))
+        result.set(reg);
+    return result;
+}
+
+RegisterSet RegisterSet::allFPRs()
+{
+    RegisterSet result;
+    for (MacroAssembler::FPRegisterID reg = MacroAssembler::firstFPRegister(); reg <= MacroAssembler::lastFPRegister(); reg = static_cast<MacroAssembler::FPRegisterID>(reg + 1))
+        result.set(reg);
+    return result;
+}
+
+RegisterSet RegisterSet::allRegisters()
+{
+    RegisterSet result;
+    result.merge(allGPRs());
+    result.merge(allFPRs());
+    return result;
+}
+
+size_t RegisterSet::numberOfSetGPRs() const
+{
+    RegisterSet temp = *this;
+    temp.filter(allGPRs());
+    return temp.numberOfSetRegisters();
+}
+
+size_t RegisterSet::numberOfSetFPRs() const
+{
+    RegisterSet temp = *this;
+    temp.filter(allFPRs());
+    return temp.numberOfSetRegisters();
+}
+
+void RegisterSet::dump(PrintStream& out) const
+{
+    CommaPrinter comma;
+    out.print("[");
+    for (Reg reg = Reg::first(); reg <= Reg::last(); reg = reg.next()) {
+        if (get(reg))
+            out.print(comma, reg);
+    }
+    out.print("]");
+}
+
+} // namespace JSC
+
+#endif // ENABLE(JIT)
+