Home | History | Annotate | Download | only in AMDGPU 
      1 //===-- AMDGPUFeatures.td - AMDGPU Feature Definitions -----*- tablegen -*-===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 def FeatureFP64 : SubtargetFeature<"fp64",
     11   "FP64",
     12   "true",
     13   "Enable double precision operations"
     14 >;
     15 
     16 def FeatureFMA : SubtargetFeature<"fmaf",
     17   "FMA",
     18   "true",
     19   "Enable single precision FMA (not as fast as mul+add, but fused)"
     20 >;
     21 
     22 // Some instructions do not support denormals despite this flag. Using
     23 // fp32 denormals also causes instructions to run at the double
     24 // precision rate for the device.
     25 def FeatureFP32Denormals : SubtargetFeature<"fp32-denormals",
     26   "FP32Denormals",
     27   "true",
     28   "Enable single precision denormal handling"
     29 >;
     30 
     31 class SubtargetFeatureLocalMemorySize <int Value> : SubtargetFeature<
     32   "localmemorysize"#Value,
     33   "LocalMemorySize",
     34   !cast<string>(Value),
     35   "The size of local memory in bytes"
     36 >;
     37 
     38 def FeatureLocalMemorySize0 : SubtargetFeatureLocalMemorySize<0>;
     39 def FeatureLocalMemorySize32768 : SubtargetFeatureLocalMemorySize<32768>;
     40 def FeatureLocalMemorySize65536 : SubtargetFeatureLocalMemorySize<65536>;
     41 
     42 class SubtargetFeatureWavefrontSize <int Value> : SubtargetFeature<
     43   "wavefrontsize"#Value,
     44   "WavefrontSize",
     45   !cast<string>(Value),
     46   "The number of threads per wavefront"
     47 >;
     48 
     49 def FeatureWavefrontSize16 : SubtargetFeatureWavefrontSize<16>;
     50 def FeatureWavefrontSize32 : SubtargetFeatureWavefrontSize<32>;
     51 def FeatureWavefrontSize64 : SubtargetFeatureWavefrontSize<64>;
     52 
     53 class SubtargetFeatureGeneration <string Value, string Subtarget,
     54                                   list<SubtargetFeature> Implies> :
     55         SubtargetFeature <Value, "Gen", Subtarget#"::"#Value,
     56                           Value#" GPU generation", Implies>;
     57 
     58 def FeatureDX10Clamp : SubtargetFeature<"dx10-clamp",
     59   "DX10Clamp",
     60   "true",
     61   "clamp modifier clamps NaNs to 0.0"
     62 >;
     63 
     64 def FeaturePromoteAlloca : SubtargetFeature <"promote-alloca",
     65   "EnablePromoteAlloca",
     66   "true",
     67   "Enable promote alloca pass"
     68 >;
     69 
     70