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//===- NVPTXSubtarget.cpp - NVPTX Subtarget Information -------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements the NVPTX specific subclass of TargetSubtarget.
//
//===----------------------------------------------------------------------===//
#include "NVPTXSubtarget.h"
#include "NVPTXTargetMachine.h"
using namespace llvm;
#define DEBUG_TYPE "nvptx-subtarget"
#define GET_SUBTARGETINFO_ENUM
#define GET_SUBTARGETINFO_TARGET_DESC
#define GET_SUBTARGETINFO_CTOR
#include "NVPTXGenSubtargetInfo.inc"
static cl::opt<bool>
NoF16Math("nvptx-no-f16-math", cl::Hidden,
cl::desc("NVPTX Specific: Disable generation of f16 math ops."),
cl::init(false));
// Pin the vtable to this file.
void NVPTXSubtarget::anchor() {}
NVPTXSubtarget &NVPTXSubtarget::initializeSubtargetDependencies(StringRef CPU,
StringRef FS) {
// Provide the default CPU if we don't have one.
TargetName = std::string(CPU.empty() ? "sm_30" : CPU);
ParseSubtargetFeatures(TargetName, /*TuneCPU*/ TargetName, FS);
// Set default to PTX 6.0 (CUDA 9.0)
if (PTXVersion == 0) {
PTXVersion = 60;
}
return *this;
}
NVPTXSubtarget::NVPTXSubtarget(const Triple &TT, const std::string &CPU,
const std::string &FS,
const NVPTXTargetMachine &TM)
: NVPTXGenSubtargetInfo(TT, CPU, /*TuneCPU*/ CPU, FS), PTXVersion(0),
SmVersion(20), TM(TM),
TLInfo(TM, initializeSubtargetDependencies(CPU, FS)) {}
bool NVPTXSubtarget::hasImageHandles() const {
// Enable handles for Kepler+, where CUDA supports indirect surfaces and
// textures
if (TM.getDrvInterface() == NVPTX::CUDA)
return (SmVersion >= 30);
// Disabled, otherwise
return false;
}
bool NVPTXSubtarget::allowFP16Math() const {
return hasFP16Math() && NoF16Math == false;
}