mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-26 06:29:20 +00:00
e3ef5439e3
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214945 91177308-0d34-0410-b5e6-96231b3b80d8
110 lines
3.6 KiB
C++
110 lines
3.6 KiB
C++
//===-- AMDGPUSubtarget.cpp - AMDGPU Subtarget Information ----------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
/// \file
|
|
/// \brief Implements the AMDGPU specific subclass of TargetSubtarget.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "AMDGPUSubtarget.h"
|
|
#include "R600ISelLowering.h"
|
|
#include "R600InstrInfo.h"
|
|
#include "R600MachineScheduler.h"
|
|
#include "SIInstrInfo.h"
|
|
#include "SIISelLowering.h"
|
|
#include "llvm/ADT/SmallString.h"
|
|
|
|
#include "llvm/ADT/SmallString.h"
|
|
|
|
using namespace llvm;
|
|
|
|
#define DEBUG_TYPE "amdgpu-subtarget"
|
|
|
|
#define GET_SUBTARGETINFO_ENUM
|
|
#define GET_SUBTARGETINFO_TARGET_DESC
|
|
#define GET_SUBTARGETINFO_CTOR
|
|
#include "AMDGPUGenSubtargetInfo.inc"
|
|
|
|
static std::string computeDataLayout(const AMDGPUSubtarget &ST) {
|
|
std::string Ret = "e-p:32:32";
|
|
|
|
if (ST.is64bit()) {
|
|
// 32-bit private, local, and region pointers. 64-bit global and constant.
|
|
Ret += "-p1:64:64-p2:64:64-p3:32:32-p4:64:64-p5:32:32-p24:64:64";
|
|
}
|
|
|
|
Ret += "-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256"
|
|
"-v512:512-v1024:1024-v2048:2048-n32:64";
|
|
|
|
return Ret;
|
|
}
|
|
|
|
AMDGPUSubtarget &
|
|
AMDGPUSubtarget::initializeSubtargetDependencies(StringRef GPU, StringRef FS) {
|
|
// Determine default and user-specified characteristics
|
|
// On SI+, we want FP64 denormals to be on by default. FP32 denormals can be
|
|
// enabled, but some instructions do not respect them and they run at the
|
|
// double precision rate, so don't enable by default.
|
|
//
|
|
// We want to be able to turn these off, but making this a subtarget feature
|
|
// for SI has the unhelpful behavior that it unsets everything else if you
|
|
// disable it.
|
|
|
|
SmallString<256> FullFS("+promote-alloca,+fp64-denormals,");
|
|
FullFS += FS;
|
|
|
|
ParseSubtargetFeatures(GPU, FullFS);
|
|
|
|
// FIXME: I don't think think Evergreen has any useful support for
|
|
// denormals, but should be checked. Should we issue a warning somewhere
|
|
// if someone tries to enable these?
|
|
if (getGeneration() <= AMDGPUSubtarget::NORTHERN_ISLANDS) {
|
|
FP32Denormals = false;
|
|
FP64Denormals = false;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
AMDGPUSubtarget::AMDGPUSubtarget(StringRef TT, StringRef GPU, StringRef FS,
|
|
TargetMachine &TM)
|
|
: AMDGPUGenSubtargetInfo(TT, GPU, FS), DevName(GPU), Is64bit(false),
|
|
DumpCode(false), R600ALUInst(false), HasVertexCache(false),
|
|
TexVTXClauseSize(0), Gen(AMDGPUSubtarget::R600), FP64(false),
|
|
FP64Denormals(false), FP32Denormals(false), CaymanISA(false),
|
|
EnableIRStructurizer(true), EnablePromoteAlloca(false), EnableIfCvt(true),
|
|
WavefrontSize(0), CFALUBug(false), LocalMemorySize(0),
|
|
DL(computeDataLayout(initializeSubtargetDependencies(GPU, FS))),
|
|
FrameLowering(TargetFrameLowering::StackGrowsUp,
|
|
64 * 16, // Maximum stack alignment (long16)
|
|
0),
|
|
InstrItins(getInstrItineraryForCPU(GPU)) {
|
|
|
|
if (getGeneration() <= AMDGPUSubtarget::NORTHERN_ISLANDS) {
|
|
InstrInfo.reset(new R600InstrInfo(*this));
|
|
TLInfo.reset(new R600TargetLowering(TM));
|
|
} else {
|
|
InstrInfo.reset(new SIInstrInfo(*this));
|
|
TLInfo.reset(new SITargetLowering(TM));
|
|
}
|
|
}
|
|
|
|
unsigned AMDGPUSubtarget::getStackEntrySize() const {
|
|
assert(getGeneration() <= NORTHERN_ISLANDS);
|
|
switch(getWavefrontSize()) {
|
|
case 16:
|
|
return 8;
|
|
case 32:
|
|
return hasCaymanISA() ? 4 : 8;
|
|
case 64:
|
|
return 4;
|
|
default:
|
|
llvm_unreachable("Illegal wavefront size.");
|
|
}
|
|
}
|