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opencv/modules/dnn/src/halide_scheduler.cpp at master · pythonmjs/opencv · GitHub
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//
This file is part of OpenCV project.
//
It is subject to the license terms in the LICENSE file found in the top-level directory
//
of this distribution and at http://opencv.org/license.html.
//
//
Copyright (C) 2017, Intel Corporation, all rights reserved.
//
Third party copyrights are property of their respective owners.
#
include
"
precomp.hpp
"
#
include
"
halide_scheduler.hpp
"
#
include
"
op_halide.hpp
"
namespace
cv
{
namespace
dnn
{
#
ifdef
HAVE_HALIDE
static
void
applySplit
(
const
FileNode& directive, Halide::Func& func,
const
FileNode& params)
{
for
(
const
auto
& varNode : directive)
{
const
std::string varName = varNode.
name
();
const
std::string factorName = (std::string)varNode;
Halide::Var
var
(varName);
Halide::Var
outerVar
(varName +
"
o
"
);
Halide::Var
innerVar
(varName +
"
i
"
);
//
If split factor is integer or parameters map has parameter value.
CV_Assert
(varNode.
isString
() && !params[factorName].
empty
() ||
varNode.
isInt
());
int
factor = (
int
)(varNode.
isInt
() ? varNode : params[factorName]);
func.
split
(var, outerVar, innerVar, factor);
}
}
static
void
applyReorder
(
const
FileNode& directive, Halide::Func& func)
{
std::string varName;
const
int
numVars = directive.
size
();
std::vector<Halide::VarOrRVar> reorderedVars;
reorderedVars.
reserve
(numVars);
for
(
int
i =
0
; i < numVars; ++i)
{
directive[i] >> varName;
reorderedVars.
push_back
(
Halide::Var
(varName));
}
func.
reorder
(reorderedVars);
}
static
void
applyFuse
(
const
FileNode& directive, Halide::Func& func)
{
CV_Assert
(directive[
"
src
"
].
size
() >=
2
);
CV_Assert
(directive[
"
dst
"
].
size
() ==
1
);
std::string str;
directive[
"
src
"
][
0
] >> str;
Halide::Var
firstVar
(str);
directive[
"
src
"
][
1
] >> str;
Halide::Var
secondVar
(str);
directive[
"
dst
"
] >> str;
Halide::Var
dstVar
(str);
func.
fuse
(firstVar, secondVar, dstVar);
for
(
int
i =
2
, n = directive[
"
src
"
].
size
(); i < n; ++i)
{
directive[
"
src
"
][i] >> str;
func.
fuse
(
Halide::Var
(str), dstVar, dstVar);
}
}
static
void
applyParallel
(
const
FileNode& directive, Halide::Func& func)
{
std::string varName;
for
(
int
i =
0
, n = directive.
size
(); i < n; ++i)
{
directive[i] >> varName;
func.
parallel
(
Halide::Var
(varName));
}
}
static
void
applyUnroll
(
const
FileNode& directive, Halide::Func& func)
{
std::string varName;
for
(
int
i =
0
, n = directive.
size
(); i < n; ++i)
{
directive[i] >> varName;
func.
unroll
(
Halide::Var
(varName));
}
}
static
void
applyVectorize
(
const
FileNode& directive, Halide::Func& func,
const
FileNode& params)
{
for
(
const
auto
& varNode : directive)
{
const
std::string varName = varNode.
name
();
const
std::string factorName = (std::string)varNode;
//
If split factor is integer or parameters map has parameter value.
CV_Assert
(varNode.
isString
() && !params[factorName].
empty
() ||
varNode.
isInt
());
int
factor = (
int
)(varNode.
isInt
() ? varNode : params[factorName]);
Halide::Var
var
(varName);
Halide::Var
inner
(varName +
"
v
"
);
func.
split
(var, var, inner, factor);
func.
vectorize
(inner);
}
}
static
void
applyStoreAt
(
const
FileNode& directive, Halide::Func& func,
std::map<std::string, Halide::Func>& funcsMap)
{
for
(
const
auto
& funcNode : directive)
{
const
std::string targetFuncName = funcNode.
name
();
if
(funcsMap.
find
(targetFuncName) == funcsMap.
end
())
CV_Error
(cv::Error::StsParseError,
"
Function
"
+ targetFuncName +
"
is not represented in Halide pipeline
"
);
Halide::Func targetFunc = funcsMap[targetFuncName];
func.
store_at
(targetFunc, (std::string)funcNode);
break
;
}
}
static
void
applyComputeAt
(
const
FileNode& directive, Halide::Func& func,
std::map<std::string, Halide::Func>& funcsMap)
{
for
(
const
auto
& funcNode : directive)
{
const
std::string targetFuncName = funcNode.
name
();
if
(funcsMap.
find
(targetFuncName) == funcsMap.
end
())
CV_Error
(cv::Error::StsParseError,
"
Function
"
+ targetFuncName +
"
is not represented in Halide pipeline
"
);
Halide::Func targetFunc = funcsMap[targetFuncName];
func.
compute_at
(targetFunc, (std::string)funcNode);
break
;
}
}
static
void
applyComputeRoot
(
const
FileNode& directive, Halide::Func& func)
{
bool
compute_root;
directive >> compute_root;
if
(compute_root)
func.
compute_root
();
}
static
void
applyGpuBlocks
(
const
FileNode& directive, Halide::Func& func)
{
std::string varName;
for
(
int
i =
0
, n = directive.
size
(); i < n; ++i)
{
directive[i] >> varName;
func.
gpu_blocks
(
Halide::Var
(varName));
}
}
static
void
applyGpuThreads
(
const
FileNode& directive, Halide::Func& func)
{
std::string varName;
for
(
int
i =
0
, n = directive.
size
(); i < n; ++i)
{
directive[i] >> varName;
func.
gpu_threads
(
Halide::Var
(varName));
}
}
static
void
apply
(
const
FileNode& directives, Halide::Func& func,
std::map<std::string, Halide::Func>& funcsMap,
const
FileNode& params)
{
for
(
const
auto
& directive : directives)
{
if
(directive.
name
() ==
"
split
"
)
applySplit
(directive, func, params);
else
if
(directive.
name
() ==
"
reorder
"
)
applyReorder
(directive, func);
else
if
(directive.
name
() ==
"
fuse
"
)
applyFuse
(directive, func);
else
if
(directive.
name
() ==
"
parallel
"
)
applyParallel
(directive, func);
else
if
(directive.
name
() ==
"
unroll
"
)
applyUnroll
(directive, func);
else
if
(directive.
name
() ==
"
vectorize
"
)
applyVectorize
(directive, func, params);
else
if
(directive.
name
() ==
"
store_at
"
)
applyStoreAt
(directive, func, funcsMap);
else
if
(directive.
name
() ==
"
compute_at
"
)
applyComputeAt
(directive, func, funcsMap);
else
if
(directive.
name
() ==
"
compute_root
"
)
applyComputeRoot
(directive, func);
else
if
(directive.
name
() ==
"
gpu_blocks
"
)
applyGpuBlocks
(directive, func);
else
if
(directive.
name
() ==
"
gpu_threads
"
)
applyGpuThreads
(directive, func);
else
CV_Error
(Error::StsNotImplemented,
"
Scheduling directive
"
+
directive.
name
() +
"
is not implemented.
"
);
}
}
//
Remove any numeric symbols after '$' sign.
static
std::string
Deunique
(std::string str)
{
int
pos = -
1
;
do
{
pos = str.
find
(
'
$
'
);
if
(pos != -
1
)
{
int
len = str.
find_first_not_of
(
"
0123456789
"
, pos +
1
) - pos;
str = str.
replace
(pos, len,
"
"
);
}
}
while
(pos != -
1
);
return
str;
}
#
endif
//
HAVE_HALIDE
HalideScheduler::HalideScheduler
(
const
std::string& configFile)
{
if
(!configFile.
empty
())
fs =
FileStorage
(configFile, FileStorage::
READ
);
}
HalideScheduler::~HalideScheduler
()
{
if
(fs.
isOpened
())
fs.
release
();
}
bool
HalideScheduler::process
(Ptr<BackendNode>& node)
{
#
ifdef
HAVE_HALIDE
if
(!fs.
isOpened
())
return
false
;
const
FileNode& scheduleNode = fs[
"
scheduling
"
];
if
(scheduleNode.
empty
())
CV_Error
(cv::Error::StsParseError,
"
Scheduling file should has scheduling node
"
);
std::string str;
std::map<std::string, Halide::Func> funcsMap;
//
Scheduled functions.
//
For every function, from top to bottom, we try to find a scheduling node.
//
Scheduling is successful (return true) if for the first function (top)
//
node is represented.
CV_Assert
(!node.
empty
());
std::vector<Halide::Func>& funcs = node.
dynamicCast
<HalideBackendNode>()->
funcs
;
for
(
int
i = funcs.
size
() -
1
; i >=
0
; --i)
{
Halide::Func& func = funcs[i];
//
For functions with the same name Halide generates unique names
//
for example func, func$1, func$2.
//
They are always formed with '$' and number.
std::string funcName =
Deunique
(func.
name
());
const
FileNode& funcNode = scheduleNode[funcName];
if
(!funcNode.
empty
())
{
if
(!funcNode[
"
pattern
"
].
empty
())
{
funcNode[
"
pattern
"
] >> str;
if
(fs[
"
patterns
"
][str].
empty
())
CV_Error
(cv::Error::StsParseError,
"
Scheduling pattern
"
+ str +
"
is not defined
"
);
apply
(fs[
"
patterns
"
][str], func, funcsMap, funcNode[
"
params
"
]);
}
else
{
apply
(funcNode, func, funcsMap, funcNode[
"
params
"
]);
}
}
else
{
if
(funcsMap.
empty
())
return
false
;
}
funcsMap[funcName] = func;
}
return
true
;
#
endif
//
HAVE_HALIDE
return
false
;
}
}
//
namespace dnn
}
//
namespace cv
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