def make_twiddlefactors(pck, fn, dependencies, extraargs={}):
# dependencies is not used
fft_length = extraargs.get('N', None)
width = extraargs.get('width', None)
if fft_length is None:
raise ValueError("N for twiddlefactors.v is not known.")
if width is None:
raise ValueError("width for twidlefactors.v is not known.")
vs = [
cmath.exp(-i * 2j * cmath.pi / fft_length)
for i in range(0, fft_length / 2)
]
tfs = cs_to_dicts(vs, width, clean1=False)
tf_dict = {
'N': fft_length,
'log_N': logceil(fft_length),
'width': width,
'tfs': tfs,
}
assert (fn == 'twiddlefactors.v.t')
twiddlefactors_fn = 'twiddlefactors_{0}.v'.format(fft_length)
in_fn = os.path.join(config.verilogdir, pck, fn)
out_fn = os.path.join(config.builddir, pck, twiddlefactors_fn)
out_dir = os.path.join(config.builddir, pck)
if not os.path.exists(out_dir):
os.makedirs(out_dir)
format_template(in_fn, out_fn, tf_dict)
return out_fn, {}
def make_twiddlefactors(pck, fn, dependencies, extraargs={}):
# dependencies is not used
fft_length = extraargs.get('N', None)
width = extraargs.get('width', None)
if fft_length is None:
raise ValueError("N for twiddlefactors.v is not known.")
if width is None:
raise ValueError("width for twidlefactors.v is not known.")
vs = [cmath.exp(-i*2j*cmath.pi/fft_length) for i in range(0, fft_length/2)]
tfs = cs_to_dicts(vs, width, clean1=False)
tf_dict = {
'N': fft_length,
'log_N': logceil(fft_length),
'width': width,
'tfs': tfs,
}
assert(fn == 'twiddlefactors.v.t')
twiddlefactors_fn = 'twiddlefactors_{0}.v'.format(fft_length)
in_fn = os.path.join(config.verilogdir, pck, fn)
out_fn = os.path.join(config.builddir, pck, twiddlefactors_fn)
out_dir = os.path.join(config.builddir, pck)
if not os.path.exists(out_dir):
os.makedirs(out_dir)
format_template(in_fn, out_fn,
tf_dict)
return out_fn, {}
def fft_length_template(pck, fn, dependencies, extraargs={}):
fft_length = extraargs.get('N', None)
if fft_length is None:
raise ValueError("N for stage_to_stage.v is not known.")
template_dict = {'N': fft_length}
assert (fn[-4:] == '.v.t')
ss_fn = fn[:-4] + "_" + str(fft_length) + '.v'
in_fn = os.path.join(config.verilogdir, pck, fn)
out_fn = os.path.join(config.builddir, pck, ss_fn)
out_dir = os.path.join(config.builddir, pck)
if not os.path.exists(out_dir):
os.makedirs(out_dir)
format_template(in_fn, out_fn, template_dict)
out_extraargs = {}
for d in dependencies:
out_extraargs[d] = extraargs
return out_fn, out_extraargs
def fft_length_template(pck, fn, dependencies, extraargs={}):
fft_length = extraargs.get('N', None)
if fft_length is None:
raise ValueError("N for stage_to_stage.v is not known.")
template_dict = {'N': fft_length}
assert(fn[-4:] == '.v.t')
ss_fn = fn[:-4] + "_" + str(fft_length) + '.v'
in_fn = os.path.join(config.verilogdir, pck, fn)
out_fn = os.path.join(config.builddir, pck, ss_fn)
out_dir = os.path.join(config.builddir, pck)
if not os.path.exists(out_dir):
os.makedirs(out_dir)
format_template(in_fn, out_fn,
template_dict)
out_extraargs = {}
for d in dependencies:
out_extraargs[d] = extraargs
return out_fn, out_extraargs
def make_summult(pck, fn, dependencies, extraargs={}):
# dependencies is not used
length = extraargs.get('summult_length', None)
if length is None:
raise ValueError("Length for summult.v is not known.")
log_length = int(math.ceil(math.log(length)/math.log(2)))
# Generate summult file
assert(fn == 'summult.v.t')
summult_fn = 'summult_{0}.v'.format(length)
in_fn = os.path.join(config.verilogdir, pck, fn)
out_fn = os.path.join(config.builddir, pck, summult_fn)
out_dir = os.path.join(config.builddir, pck)
if not os.path.exists(out_dir):
os.makedirs(out_dir)
real_sum = ["x_re_y[{0}]".format(i) for i in range(length)]
real_sum = " + ".join(real_sum)
imag_sum = ["x_im_y[{0}]".format(i) for i in range(length)]
imag_sum = " + ".join(imag_sum)
format_template(in_fn, out_fn,
{'real_sum': real_sum,
'imag_sum': imag_sum})
return out_fn, {}
def make_filter(pck, fn, dependencies, extraargs={}):
"""
Generate filter_X.v from filter.v
This is done so that we can convert the 2D array tapvalues to
a 1D array to pass to summult.
"""
# dependencies is not used
length = extraargs.get('summult_length', None)
if length is None:
raise ValueError("Length for filter.v is not known.")
log_length = int(math.ceil(math.log(length)/math.log(2)))
# Generate filter file
assert(fn == 'filter.v.t')
summult_fn = 'filter_{0}.v'.format(length)
in_fn = os.path.join(config.verilogdir, pck, fn)
out_fn = os.path.join(config.builddir, pck, summult_fn)
out_dir = os.path.join(config.builddir, pck)
if not os.path.exists(out_dir):
os.makedirs(out_dir)
tapvalues_1D = ["tapvalues[{0}]".format(i) for i in reversed(range(length))]
tapvalues_1D = "{" + ", ".join(tapvalues_1D) + "}"
format_template(in_fn, out_fn, {'tapvalues_1D': tapvalues_1D})
return out_fn, {'summult.v.t': extraargs}