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//===- AlphaSubtarget.cpp - Alpha Subtarget Information ---------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Andrew Lenharth and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the Alpha specific subclass of TargetSubtarget.
//
//===----------------------------------------------------------------------===//
#include "AlphaSubtarget.h"
#include "Alpha.h"
#include "llvm/Module.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Target/SubtargetFeature.h"
#include "llvm/Support/Debug.h"
using namespace llvm;
enum AlphaFeature {
AlphaFeatureCIX = 1 << 0,
AlphaFeatureFIX = 1 << 1,
};
/// Sorted (by key) array of values for CPU subtype.
static const SubtargetFeatureKV AlphaSubTypeKV[] = {
{ "ev56" , "Select the Alpha EV56 processor", 0 },
{ "ev6" , "Select the Alpha EV6 processor", AlphaFeatureFIX },
{ "ev67" , "Select the Alpha EV67 processor", AlphaFeatureFIX | AlphaFeatureCIX },
{ "generic", "Select instructions for a generic Alpha processor (EV56)", 0 },
{ "pca56" , "Select the Alpha PCA56 processor", 0 },
};
/// Length of AlphaSubTypeKV.
static const unsigned AlphaSubTypeKVSize = sizeof(AlphaSubTypeKV)
/ sizeof(SubtargetFeatureKV);
/// Sorted (by key) array of values for CPU features.
static SubtargetFeatureKV AlphaFeatureKV[] = {
{ "CIX", "Should CIX extentions be used" , AlphaFeatureCIX },
{ "FIX" , "Should FIX extentions be used" , AlphaFeatureFIX },
};
/// Length of AlphaFeatureKV.
static const unsigned AlphaFeatureKVSize = sizeof(AlphaFeatureKV)
/ sizeof(SubtargetFeatureKV);
AlphaSubtarget::AlphaSubtarget(const Module &M, const std::string &FS)
:HasF2I(false), HasCT(false)
{
std::string CPU = "generic";
uint32_t Bits =
SubtargetFeatures::Parse(FS, CPU,
AlphaSubTypeKV, AlphaSubTypeKVSize,
AlphaFeatureKV, AlphaFeatureKVSize);
HasF2I = (Bits & AlphaFeatureFIX) != 0;
HasCT = (Bits & AlphaFeatureCIX) != 0;
}
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