def test_cuda_target():
from loopy.target.cuda import CudaTarget
knl = lp.make_kernel(
"{ [i]: 0<=i<n }",
"out[i] = 2*a[i]",
[lp.GlobalArg("out,a", np.float32, shape=lp.auto), "..."],
target=CudaTarget())
knl = lp.split_iname(knl, "i", 8, inner_tag="l.0")
knl = lp.split_iname(knl, "i_outer", 4, outer_tag="g.0", inner_tag="ilp")
knl = lp.add_prefetch(knl, "a", ["i_inner", "i_outer_inner"])
print(
lp.generate_code(lp.get_one_scheduled_kernel(
lp.preprocess_kernel(knl)))[0])
def test_cuda_target():
from loopy.target.cuda import CudaTarget
knl = lp.make_kernel(
"{ [i]: 0<=i<n }",
"out[i] = 2*a[i]",
[lp.GlobalArg("out,a", np.float32, shape=lp.auto), "..."],
target=CudaTarget())
knl = lp.split_iname(knl, "i", 8, inner_tag="l.0")
knl = lp.split_iname(knl, "i_outer", 4, outer_tag="g.0", inner_tag="ilp")
knl = lp.add_prefetch(knl,
"a", ["i_inner", "i_outer_inner"],
default_tag="l.auto")
print(lp.generate_code_v2(knl).device_code())
def main():
from argparse import ArgumentParser
parser = ArgumentParser(description="Stand-alone loopy frontend")
parser.add_argument("infile", metavar="INPUT_FILE")
parser.add_argument("outfile",
default="-",
metavar="OUTPUT_FILE",
help="Defaults to stdout ('-').",
nargs="?")
parser.add_argument("--lang", metavar="LANGUAGE", help="loopy|fortran")
parser.add_argument("--target",
choices=("opencl", "ispc", "ispc-occa", "c",
"c-fortran", "cuda"),
default="opencl")
parser.add_argument("--name")
parser.add_argument("--transform")
parser.add_argument("--edit-code", action="store_true")
parser.add_argument("--occa-defines")
parser.add_argument("--occa-add-dummy-arg", action="store_true")
parser.add_argument("--print-ir", action="store_true")
args = parser.parse_args()
if args.target == "opencl":
from loopy.target.opencl import OpenCLTarget
target = OpenCLTarget()
elif args.target == "ispc":
from loopy.target.ispc import ISPCTarget
target = ISPCTarget()
elif args.target == "ispc-occa":
from loopy.target.ispc import ISPCTarget
target = ISPCTarget(occa_mode=True)
elif args.target == "c":
from loopy.target.c import CTarget
target = CTarget()
elif args.target == "c-fortran":
from loopy.target.c import CTarget
target = CTarget(fortran_abi=True)
elif args.target == "cuda":
from loopy.target.cuda import CudaTarget
target = CudaTarget()
else:
raise ValueError("unknown target: %s" % target)
lp.set_default_target(target)
lang = None
if args.infile == "-":
infile_content = sys.stdin.read()
else:
from os.path import splitext
_, ext = splitext(args.infile)
lang = {
".py": "loopy",
".loopy": "loopy",
".floopy": "fortran",
".f90": "fortran",
".fpp": "fortran",
".f": "fortran",
".f77": "fortran",
}.get(ext)
with open(args.infile) as infile_fd:
infile_content = infile_fd.read()
if args.lang is not None:
lang = args.lang
if lang is None:
raise RuntimeError("unable to deduce input language "
"(wrong input file extension? --lang flag?)")
if lang == "loopy":
# {{{ path wrangling
from os.path import dirname, abspath
from os import getcwd
infile_dirname = dirname(args.infile)
if infile_dirname:
infile_dirname = abspath(infile_dirname)
else:
infile_dirname = getcwd()
sys.path.append(infile_dirname)
# }}}
data_dic = {}
data_dic["lp"] = lp
data_dic["np"] = np
if args.occa_defines:
with open(args.occa_defines) as defines_fd:
occa_define_code = defines_to_python_code(defines_fd.read())
exec(compile(occa_define_code, args.occa_defines, "exec"),
data_dic)
with open(args.infile) as infile_fd:
exec(compile(infile_content, args.infile, "exec"), data_dic)
if args.transform:
with open(args.transform) as xform_fd:
exec(compile(xform_fd.read(), args.transform, "exec"),
data_dic)
try:
kernel = data_dic["lp_knl"]
except KeyError:
raise RuntimeError("loopy-lang requires 'lp_knl' "
"to be defined on exit")
if args.name is not None:
kernel = kernel.copy(name=args.name)
kernels = [kernel]
elif lang in ["fortran", "floopy", "fpp"]:
pre_transform_code = None
if args.transform:
with open(args.transform) as xform_fd:
pre_transform_code = xform_fd.read()
if args.occa_defines:
if pre_transform_code is None:
pre_transform_code = ""
with open(args.occa_defines) as defines_fd:
pre_transform_code = (
defines_to_python_code(defines_fd.read()) +
pre_transform_code)
kernels = lp.parse_transformed_fortran(
infile_content,
pre_transform_code=pre_transform_code,
filename=args.infile)
if args.name is not None:
kernels = [
kernel for kernel in kernels if kernel.name == args.name
]
if not kernels:
raise RuntimeError("no kernels found (name specified: %s)" %
args.name)
else:
raise RuntimeError("unknown language: '%s'" % args.lang)
if args.print_ir:
for kernel in kernels:
print(kernel, file=sys.stderr)
if args.occa_add_dummy_arg:
new_kernels = []
for kernel in kernels:
new_args = [lp.ArrayArg("occa_info", np.int32, shape=None)
] + kernel.args
new_kernels.append(kernel.copy(args=new_args))
kernels = new_kernels
del new_kernels
codes = []
from loopy.codegen import generate_code
for kernel in kernels:
kernel = lp.preprocess_kernel(kernel)
code, impl_arg_info = generate_code(kernel)
codes.append(code)
if args.outfile is not None:
outfile = args.outfile
else:
outfile = "-"
code = "\n\n".join(codes)
# {{{ edit code if requested
import os
edit_kernel_env = os.environ.get("LOOPY_EDIT_KERNEL")
need_edit = args.edit_code
if not need_edit and edit_kernel_env is not None:
# Do not replace with "any()"--Py2.6/2.7 bug doesn't like
# comprehensions in functions with exec().
for k in kernels:
if edit_kernel_env.lower() in k.name.lower():
need_edit = True
if need_edit:
from pytools import invoke_editor
code = invoke_editor(code, filename="edit.cl")
# }}}
if outfile == "-":
sys.stdout.write(code)
else:
with open(outfile, "w") as outfile_fd:
outfile_fd.write(code)