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//===-- AMDGPUFeatures.td - AMDGPU Feature Definitions -----*- tablegen -*-===//
//                     The LLVM Compiler Infrastructure
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.

def FeatureFP64 : SubtargetFeature<"fp64",
  "Enable double precision operations"

def FeatureFMA : SubtargetFeature<"fmaf",
  "Enable single precision FMA (not as fast as mul+add, but fused)"

// Some instructions do not support denormals despite this flag. Using
// fp32 denormals also causes instructions to run at the double
// precision rate for the device.
def FeatureFP32Denormals : SubtargetFeature<"fp32-denormals",
  "Enable single precision denormal handling"

class SubtargetFeatureLocalMemorySize <int Value> : SubtargetFeature<
  "The size of local memory in bytes"

def FeatureLocalMemorySize0 : SubtargetFeatureLocalMemorySize<0>;
def FeatureLocalMemorySize32768 : SubtargetFeatureLocalMemorySize<32768>;
def FeatureLocalMemorySize65536 : SubtargetFeatureLocalMemorySize<65536>;

class SubtargetFeatureWavefrontSize <int Value> : SubtargetFeature<
  "The number of threads per wavefront"

def FeatureWavefrontSize16 : SubtargetFeatureWavefrontSize<16>;
def FeatureWavefrontSize32 : SubtargetFeatureWavefrontSize<32>;
def FeatureWavefrontSize64 : SubtargetFeatureWavefrontSize<64>;

class SubtargetFeatureGeneration <string Value, string Subtarget,
                                  list<SubtargetFeature> Implies> :
        SubtargetFeature <Value, "Gen", Subtarget#"::"#Value,
                          Value#" GPU generation", Implies>;

def FeatureDX10Clamp : SubtargetFeature<"dx10-clamp",
  "clamp modifier clamps NaNs to 0.0"

def FeaturePromoteAlloca : SubtargetFeature <"promote-alloca",
  "Enable promote alloca pass"