| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /* |
| * This script generates reference ("exact") values for the gamma function. |
| * The generated values are stored sequentially in a binary file, as follows |
| * x[0], f(x[0]), x[1], f(x[1]), ... |
| * where f is the function being sampled. |
| */ |
| kill(all); |
| |
| fpprec : 64; |
| f(x) := gamma(x); |
| |
| sample(x, name) := block( |
| y : [], |
| for i : 1 while i <= length(x) do y : endcons(float(f(x[i])), y), |
| xy : join(float(x), y), |
| stream : openw_binary(name), |
| write_binary_data(xy, stream), |
| close(stream) |
| ); |
| |
| x : makelist(bfloat(i / 1024), i, -5119, -4097); |
| sample(x, "gamma-01.dat"); |
| |
| x : makelist(bfloat(i / 1024), i, -4095, -3073); |
| sample(x, "gamma-02.dat"); |
| |
| x : makelist(bfloat(i / 1024), i, -3071, -2049); |
| sample(x, "gamma-03.dat"); |
| |
| x : makelist(bfloat(i / 1024), i, -2047, -1025); |
| sample(x, "gamma-04.dat"); |
| |
| x : makelist(bfloat(i / 1024), i, -1023, -1); |
| sample(x, "gamma-05.dat"); |
| |
| x : makelist(bfloat(i / 1024), i, 1, 8192); |
| sample(x, "gamma-06.dat"); |
| |
| x : makelist(bfloat(i / 64), i, 513, 9024); |
| sample(x, "gamma-07.dat"); |
| |
| |