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//===---- AMDILDevice.h - Define Device Data for AMDGPU -----*- C++ -*------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//==-----------------------------------------------------------------------===//
//
/// \file
/// \brief Interface for the subtarget data classes.
//
/// This file will define the interface that each generation needs to
/// implement in order to correctly answer queries on the capabilities of the
/// specific hardware.
//===----------------------------------------------------------------------===//
#ifndef AMDILDEVICEIMPL_H
#define AMDILDEVICEIMPL_H
#include "AMDIL.h"
#include "llvm/ADT/BitVector.h"
namespace llvm {
class AMDGPUSubtarget;
class MCStreamer;
//===----------------------------------------------------------------------===//
// Interface for data that is specific to a single device
//===----------------------------------------------------------------------===//
class AMDGPUDevice {
public:
AMDGPUDevice(AMDGPUSubtarget *ST);
virtual ~AMDGPUDevice();
// Enum values for the various memory types.
enum {
RAW_UAV_ID = 0,
ARENA_UAV_ID = 1,
LDS_ID = 2,
GDS_ID = 3,
SCRATCH_ID = 4,
CONSTANT_ID = 5,
GLOBAL_ID = 6,
MAX_IDS = 7
} IO_TYPE_IDS;
/// \returns The max LDS size that the hardware supports. Size is in
/// bytes.
virtual size_t getMaxLDSSize() const = 0;
/// \returns The max GDS size that the hardware supports if the GDS is
/// supported by the hardware. Size is in bytes.
virtual size_t getMaxGDSSize() const;
/// \returns The max number of hardware constant address spaces that
/// are supported by this device.
virtual size_t getMaxNumCBs() const;
/// \returns The max number of bytes a single hardware constant buffer
/// can support. Size is in bytes.
virtual size_t getMaxCBSize() const;
/// \returns The max number of bytes allowed by the hardware scratch
/// buffer. Size is in bytes.
virtual size_t getMaxScratchSize() const;
/// \brief Get the flag that corresponds to the device.
virtual uint32_t getDeviceFlag() const;
/// \returns The number of work-items that exist in a single hardware
/// wavefront.
virtual size_t getWavefrontSize() const = 0;
/// \brief Get the generational name of this specific device.
virtual uint32_t getGeneration() const = 0;
/// \brief Get the stack alignment of this specific device.
virtual uint32_t getStackAlignment() const;
/// \brief Get the resource ID for this specific device.
virtual uint32_t getResourceID(uint32_t DeviceID) const = 0;
/// \brief Get the max number of UAV's for this device.
virtual uint32_t getMaxNumUAVs() const = 0;
// API utilizing more detailed capabilities of each family of
// cards. If a capability is supported, then either usesHardware or
// usesSoftware returned true. If usesHardware returned true, then
// usesSoftware must return false for the same capability. Hardware
// execution means that the feature is done natively by the hardware
// and is not emulated by the softare. Software execution means
// that the feature could be done in the hardware, but there is
// software that emulates it with possibly using the hardware for
// support since the hardware does not fully comply with OpenCL
// specs.
bool isSupported(AMDGPUDeviceInfo::Caps Mode) const;
bool usesHardware(AMDGPUDeviceInfo::Caps Mode) const;
bool usesSoftware(AMDGPUDeviceInfo::Caps Mode) const;
virtual std::string getDataLayout() const;
static const unsigned int MAX_LDS_SIZE_700 = 16384;
static const unsigned int MAX_LDS_SIZE_800 = 32768;
static const unsigned int WavefrontSize = 64;
static const unsigned int HalfWavefrontSize = 32;
static const unsigned int QuarterWavefrontSize = 16;
protected:
virtual void setCaps();
BitVector mHWBits;
llvm::BitVector mSWBits;
AMDGPUSubtarget *mSTM;
uint32_t DeviceFlag;
private:
AMDGPUDeviceInfo::ExecutionMode
getExecutionMode(AMDGPUDeviceInfo::Caps Caps) const;
};
} // namespace llvm
#endif // AMDILDEVICEIMPL_H
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