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// Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#ifndef RUNTIME_VM_CPU_ARM_H_
#define RUNTIME_VM_CPU_ARM_H_
#include "vm/allocation.h"
#include "vm/simulator.h"
namespace dart {
// TargetCPUFeatures gives CPU features for the architecture that we are
// generating code for. HostCPUFeatures gives the CPU features for the
// architecture that we are actually running on. When the architectures
// are the same, TargetCPUFeatures will query HostCPUFeatures. When they are
// different (i.e. we are running in a simulator), HostCPUFeatures will
// additionally mock the options needed for the target architecture so that
// they may be altered for testing.
enum ARMVersion {
ARMv5TE,
ARMv6,
ARMv7,
ARMvUnknown,
};
class HostCPUFeatures : public AllStatic {
public:
static void Init();
static void Cleanup();
static const char* hardware() {
DEBUG_ASSERT(initialized_);
return hardware_;
}
static bool integer_division_supported() {
DEBUG_ASSERT(initialized_);
return integer_division_supported_;
}
static bool vfp_supported() {
DEBUG_ASSERT(initialized_);
return vfp_supported_;
}
static bool neon_supported() {
DEBUG_ASSERT(initialized_);
return neon_supported_;
}
static bool hardfp_supported() {
DEBUG_ASSERT(initialized_);
return hardfp_supported_;
}
static ARMVersion arm_version() {
DEBUG_ASSERT(initialized_);
return arm_version_;
}
static intptr_t store_pc_read_offset() {
DEBUG_ASSERT(initialized_);
return store_pc_read_offset_;
}
#if !defined(HOST_ARCH_ARM)
static void set_integer_division_supported(bool supported) {
DEBUG_ASSERT(initialized_);
integer_division_supported_ = supported;
}
static void set_vfp_supported(bool supported) {
DEBUG_ASSERT(initialized_);
vfp_supported_ = supported;
}
static void set_neon_supported(bool supported) {
DEBUG_ASSERT(initialized_);
neon_supported_ = supported;
}
static void set_arm_version(ARMVersion version) {
DEBUG_ASSERT(initialized_);
arm_version_ = version;
}
#endif // !defined(HOST_ARCH_ARM)
private:
static const char* hardware_;
static bool integer_division_supported_;
static bool vfp_supported_;
static bool neon_supported_;
static bool hardfp_supported_;
static ARMVersion arm_version_;
static intptr_t store_pc_read_offset_;
#if defined(DEBUG)
static bool initialized_;
#endif
};
class TargetCPUFeatures : public AllStatic {
public:
static void Init() { HostCPUFeatures::Init(); }
static void Cleanup() { HostCPUFeatures::Cleanup(); }
static bool double_truncate_round_supported() { return false; }
static bool integer_division_supported() {
return HostCPUFeatures::integer_division_supported();
}
static bool vfp_supported() { return HostCPUFeatures::vfp_supported(); }
static bool can_divide() {
return integer_division_supported() || vfp_supported();
}
static bool neon_supported() { return HostCPUFeatures::neon_supported(); }
static bool hardfp_supported() { return HostCPUFeatures::hardfp_supported(); }
static const char* hardware() { return HostCPUFeatures::hardware(); }
static ARMVersion arm_version() { return HostCPUFeatures::arm_version(); }
static intptr_t store_pc_read_offset() {
return HostCPUFeatures::store_pc_read_offset();
}
};
} // namespace dart
#endif // RUNTIME_VM_CPU_ARM_H_