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#!/usr/bin/env python3
import argparse
import sys
import random
from contextlib import contextmanager
@contextmanager
def redirect_stdout(new_target):
old_target, sys.stdout = sys.stdout, new_target
try:
yield new_target
finally:
sys.stdout = old_target
def random_expression(depth = 3, maxparam = 0):
def recursion():
return random_expression(depth = depth-1, maxparam = maxparam)
if depth == 0:
if maxparam != 0 and random.randint(0, 1) != 0:
return 'p%02d' % random.randint(0, maxparam-1)
return random.choice([ '%e', '%f', '%g' ]) % random.uniform(-2, +2)
if random.randint(0, 4) == 0:
return recursion() + random.choice([ ' < ', ' <= ', ' == ', ' != ', ' >= ', ' > ' ]) + recursion() + ' ? ' + recursion() + ' : ' + recursion()
op_prefix = [ '+(', '-(' ]
op_infix = [ ' + ', ' - ', ' * ', ' / ' ]
op_func1 = [ '$ln', '$log10', '$exp', '$sqrt', '$floor', '$ceil', '$sin', '$cos', '$tan', '$asin', '$acos', '$atan', '$sinh', '$cosh', '$tanh', '$asinh', '$acosh', '$atanh' ]
op_func2 = [ '$pow', '$atan2', '$hypot' ]
op = random.choice(op_prefix + op_infix + op_func1 + op_func2)
if op in op_prefix:
return op + recursion() + ')'
if op in op_infix:
return '(' + recursion() + op + recursion() + ')'
if op in op_func1:
return op + '(' + recursion() + ')'
if op in op_func2:
return op + '(' + recursion() + ', ' + recursion() + ')'
raise
parser = argparse.ArgumentParser(formatter_class = argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument('-S', '--seed', type = int, help = 'seed for PRNG')
parser.add_argument('-c', '--count', type = int, default = 100, help = 'number of test cases to generate')
args = parser.parse_args()
if args.seed is not None:
print("PRNG seed: %d" % args.seed)
random.seed(args.seed)
for idx in range(args.count):
with open('temp/uut_%05d.v' % idx, 'w') as f:
with redirect_stdout(f):
print('module uut_%05d(output [63:0] %s);\n' % (idx, ', '.join(['y%02d' % i for i in range(100)])))
for i in range(30):
if idx < 10:
print('localparam p%02d = %s;' % (i, random_expression()))
else:
print('localparam%s p%02d = %s;' % (random.choice(['', ' real', ' integer']), i, random_expression()))
for i in range(30, 60):
if idx < 10:
print('localparam p%02d = %s;' % (i, random_expression(maxparam = 30)))
else:
print('localparam%s p%02d = %s;' % (random.choice(['', ' real', ' integer']), i, random_expression(maxparam = 30)))
for i in range(100):
print('assign y%02d = 65536 * (%s);' % (i, random_expression(maxparam = 60)))
print('endmodule')
with open('temp/uut_%05d.ys' % idx, 'w') as f:
with redirect_stdout(f):
print('read_verilog uut_%05d.v' % idx)
print('rename uut_%05d uut_%05d_syn' % (idx, idx))
print('write_verilog uut_%05d_syn.v' % idx)
with open('temp/uut_%05d_tb.v' % idx, 'w') as f:
with redirect_stdout(f):
print('module uut_%05d_tb;\n' % idx)
print('wire [63:0] %s;' % (', '.join(['r%02d' % i for i in range(100)])))
print('wire [63:0] %s;' % (', '.join(['s%02d' % i for i in range(100)])))
print('uut_%05d ref(%s);' % (idx, ', '.join(['r%02d' % i for i in range(100)])))
print('uut_%05d_syn syn(%s);' % (idx, ', '.join(['s%02d' % i for i in range(100)])))
print('task compare_ref_syn;')
print(' input [7:0] i;')
print(' input [63:0] r, s;')
print(' reg [64*8-1:0] buffer;')
print(' integer j;')
print(' begin')
print(' if (-1 <= $signed(r-s) && $signed(r-s) <= +1) begin')
print(' // $display("%d: %b %b", i, r, s);')
print(' end else if (r === s) begin ')
print(' // $display("%d: %b %b", i, r, s);')
print(' end else begin ')
print(' for (j = 0; j < 64; j = j+1)')
print(' buffer[j*8 +: 8] = r[j] !== s[j] ? "^" : " ";')
print(' $display("\\n%3d: %b %b", i, r, s);')
print(' $display(" %s %s", buffer, buffer);')
print(' end')
print(' end')
print('endtask')
print('initial begin #1;')
for i in range(100):
print(' compare_ref_syn(%2d, r%02d, s%02d);' % (i, i, i))
print('end')
print('endmodule')
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