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(* Copyright 2012 Ian Hinder
This file is part of Kranc.
Kranc is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
Kranc is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Kranc; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*)
BeginPackage["CaKernel`", {"Errors`", "Helpers`", "Kranc`", "CodeGenCactus`", "MapLookup`",
"Calculation`", "CodeGen`", "CalculationFunction`", "CodeGenC`"}];
CaKernelCCL;
CaKernelCode;
CaKernelEpilogue;
CaKernelSchedule;
CaKernelConfigurationCLL;
CaKernelInterfaceCLL;
Begin["`Private`"];
DefFn[
variableBlock[var_, intent_String, cached_] :=
CCLBlockCompact["CCTK_CUDA_KERNEL_VARIABLE", "", {"cached" -> If[cached,"yes","no"], "intent" -> intent}, {var}, ToString[var]]];
DefFn[
parameterBlock[par_] :=
CCLBlock["CCTK_CUDA_KERNEL_PARAMETER", "", {}, {par,"\n"}, ToString[par]]];
DefFn[
variableBlocks[calc_] :=
Module[
{in,out,all,inOnly,outOnly,inOut,params, cachedVars},
params = GetCalculationParameters[calc];
in = Join[InputGridFunctions[calc]];
out = OutputGridFunctions[calc];
all = Union[in,out];
inOnly = Join[Complement[in, out]];
outOnly = Complement[out, in];
inOut = Intersection[in,out];
cachedVars = lookupDefault[calc, CachedVariables, {}];
Riffle[
Map[variableBlock[#, Which[MemberQ[inOnly, #], "in",
MemberQ[outOnly, #], "out",
MemberQ[inOut, #], "inout",
True,ThrowError["Unable to determine use of variable "<>ToString[#]]],
MemberQ[cachedVars,#]] &, all]~Join~
Map[parameterBlock, params],
""]]];
DefFn[
kernelCCLBlock[calc_, tileSize_List] :=
Module[
{bnd = (GetCalculationWhere[calc] === Boundary),
int, attrs},
int = !bnd;
attrs = {"TYPE" -> If[int, "gpu_cuda_dc/3dblock2", "gpu_cuda_dc/boundary_s"],
"TILE" -> Quote[StringJoin[Riffle[ToString/@tileSize,","]]],
"SHARECODE" -> "yes"};
If[int,
attrs = Append[attrs,
"STENCIL" ->
Quote@FlattenBlock@Riffle[
Flatten[Map[{#,#} &,
CalculationStencilSize[calc]],1],","]]];
CCLBlock["CCTK_CUDA_KERNEL", lookup[calc, Name], attrs,
variableBlocks[calc]]]];
Options[CaKernelCCL] = ThornOptions;
DefFn[CaKernelCCL[calcs_List, opts:OptionsPattern[]] :=
Module[
{},
Map[kernelCCLBlock[#,OptionValue[TileSize]] &, Select[calcs, CalculationOnDevice]]]];
DefFn[CaKernelSchedule[] :=
{}];
CaKernelConfigurationCLL[] :=
"REQUIRES CUDA";
CaKernelInterfaceCLL[] :=
"
# These functions are provided by the CaKernel thorn
CCTK_INT FUNCTION Device_RegisterMem(CCTK_POINTER IN cctkGH, CCTK_INT IN vi, CCTK_INT IN num_tls)
REQUIRES FUNCTION Device_RegisterMem
CCTK_INT FUNCTION Device_UnRegisterMem(CCTK_POINTER IN cctkGH, CCTK_INT IN vi)
REQUIRES FUNCTION Device_UnRegisterMem
CCTK_POINTER FUNCTION Device_GetVarI (CCTK_POINTER IN cctkGH, CCTK_INT IN vi, CCTK_INT IN num_tls)
REQUIRES FUNCTION Device_GetVarI
";
DefFn[codeBlock[macro_String, contents_] :=
Module[
{},
CheckBlock[contents];
{macro<>"_Begin", "\n",
IndentBlock[{contents,"\n"}],
macro<>"_End","\n"}]];
DefFn[
CaKernelInitialiseFDVariables[] :=
CommentedBlock[
"Initialise finite differencing variables",
{
DeclareAssignVariable[DataType[], "dx", "params.cagh_dx"],
DeclareAssignVariable[DataType[], "dy", "params.cagh_dy"],
DeclareAssignVariable[DataType[], "dz", "params.cagh_dz"],
DeclareAssignVariable[DataType[], "dt", "params.cagh_dt"],
DeclareAssignVariable[DataType[], "t", "params.cagh_time"],
DeclareAssignVariable[DataType[], "dxi", "INV(dx)"],
DeclareAssignVariable[DataType[], "dyi", "INV(dy)"],
DeclareAssignVariable[DataType[], "dzi", "INV(dz)"],
DeclareAssignVariable[DataType[], "khalf", "0.5"],
DeclareAssignVariable[DataType[], "kthird", "1/3.0"],
DeclareAssignVariable[DataType[], "ktwothird", "2.0/3.0"],
DeclareAssignVariable[DataType[], "kfourthird", "4.0/3.0"],
DeclareAssignVariable[DataType[], "keightthird", "8.0/3.0"],
DeclareAssignVariable[DataType[], "hdxi", "0.5 * dxi"],
DeclareAssignVariable[DataType[], "hdyi", "0.5 * dyi"],
DeclareAssignVariable[DataType[], "hdzi", "0.5 * dzi"]}]];
cakernelLoopFunctionInt[b_, opts___] :=
codeBlock[LoopName /. {opts}, b];
cakernelLoopFunctionBnd[b_, opts___] :=
b;
DefFn[CaKernelCode[calc_List,opts___] :=
Module[
{kernel = "CAKERNEL_"<>GetCalculationName[calc], calc2,
compSuff, int, loopFunction},
SetDataType["CCTK_REAL"];
int = (GetCalculationWhere[calc] =!= Boundary);
loopFunction = If[int, cakernelLoopFunctionInt, cakernelLoopFunctionBnd];
calc2 = Join[calc, {BodyFunction -> (codeBlock[kernel, #] &),
CallerFunction -> False,
LoopFunction -> loopFunction,
GFAccessFunction -> ({"I3D(",Riffle[{#,0,0,0},","],")"} &),
InitFDVariables -> CaKernelInitialiseFDVariables[],
MacroPointer -> False}];
If[!int,
calc2 = calc2 /. {normal1 -> "bound_x", normal2 -> "bound_y", normal3 -> "bound_z"}];
{"#undef KRANC_DIFF_FUNCTIONS\n",
"#define KRANC_" <> ToUpperCase[CodeGenC`SOURCELANGUAGE] <> "\n",
Map[IncludeFile, {"Differencing.h", "GenericFD.h"}],
"\n",
"#undef KRANC_GFOFFSET3D\n",
"#define KRANC_GFOFFSET3D(u,i,j,k) I3D(u,i,j,k)\n",
"\n",
CalculationMacros[],
"\n", CreateCalculationFunction[calc2, LoopName -> kernel<>"_Computations",
opts]}]];
End[];
EndPackage[];
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