| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed 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. |
| */ |
| |
| package com.example.android.rs.matherr; |
| |
| import android.content.res.Resources; |
| import android.renderscript.*; |
| import java.lang.Float; |
| import java.lang.Math; |
| |
| public class MathErr { |
| private RenderScript mRS; |
| private Allocation mAllocationSrc; |
| private Allocation mAllocationRes; |
| private ScriptC_math_err mScript; |
| private java.util.Random mRand = new java.util.Random(); |
| |
| private final int BUF_SIZE = 4096; |
| float mSrc[] = new float[BUF_SIZE]; |
| float mRef[] = new float[BUF_SIZE]; |
| float mRes[] = new float[BUF_SIZE]; |
| |
| MathErr(RenderScript rs) { |
| mRS = rs; |
| mScript = new ScriptC_math_err(mRS); |
| |
| mAllocationSrc = Allocation.createSized(rs, Element.F32(rs), BUF_SIZE); |
| mAllocationRes = Allocation.createSized(rs, Element.F32(rs), BUF_SIZE); |
| |
| testExp2(); |
| testLog2(); |
| } |
| |
| void buildRand() { |
| for (int i=0; i < BUF_SIZE; i++) { |
| mSrc[i] = (((float)i) / 9) - 200; |
| //mSrc[i] = Float.intBitsToFloat(mRand.nextInt()); |
| } |
| mAllocationSrc.copyFrom(mSrc); |
| } |
| |
| void logErr() { |
| mAllocationRes.copyTo(mRes); |
| for (int i=0; i < BUF_SIZE; i++) { |
| int err = Float.floatToRawIntBits(mRef[i]) - Float.floatToRawIntBits(mRes[i]); |
| err = Math.abs(err); |
| if (err > 8096) { |
| android.util.Log.v("err", "error " + err + " src " + mSrc[i] + " ref " + mRef[i] + " res " + mRes[i]); |
| } |
| } |
| } |
| |
| void testExp2() { |
| android.util.Log.v("err", "testing exp2"); |
| buildRand(); |
| mScript.forEach_testExp2(mAllocationSrc, mAllocationRes); |
| for (int i=0; i < BUF_SIZE; i++) { |
| mRef[i] = (float)Math.pow(2.f, mSrc[i]); |
| } |
| logErr(); |
| } |
| |
| void testLog2() { |
| android.util.Log.v("err", "testing log2"); |
| buildRand(); |
| mScript.forEach_testLog2(mAllocationSrc, mAllocationRes); |
| for (int i=0; i < BUF_SIZE; i++) { |
| mRef[i] = (float)Math.log(mSrc[i]) * 1.442695041f; |
| } |
| logErr(); |
| } |
| |
| } |