Merge "Add math agreement test. float_distance and float_almost_agree added to header"

4 files changed, 146 insertions, 0 deletions

diff --git a/tests/RenderScriptTests/tests/src/com/android/rs/test/RSTestCore.java b/tests/RenderScriptTests/tests/src/com/android/rs/test/RSTestCore.java
index d0f3e62..36f13b1 100644
--- a/tests/RenderScriptTests/tests/src/com/android/rs/test/RSTestCore.java
+++ b/tests/RenderScriptTests/tests/src/com/android/rs/test/RSTestCore.java
@@ -84,6 +84,7 @@ public class RSTestCore {
         unitTests.add(new UT_struct(this, mRes, mCtx));
         unitTests.add(new UT_math(this, mRes, mCtx));
         unitTests.add(new UT_math_conformance(this, mRes, mCtx));
+        unitTests.add(new UT_math_agree(this, mRes, mCtx));
         unitTests.add(new UT_element(this, mRes, mCtx));
         unitTests.add(new UT_sampler(this, mRes, mCtx));
         unitTests.add(new UT_program_store(this, mRes, mCtx));
diff --git a/tests/RenderScriptTests/tests/src/com/android/rs/test/UT_math_agree.java b/tests/RenderScriptTests/tests/src/com/android/rs/test/UT_math_agree.java
new file mode 100644
index 0000000..32a4bd7
--- /dev/null
+++ b/tests/RenderScriptTests/tests/src/com/android/rs/test/UT_math_agree.java
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2012 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.android.rs.test;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.renderscript.*;
+import java.util.Random;
+
+public class UT_math_agree extends UnitTest {
+    private Resources mRes;
+
+    protected UT_math_agree(RSTestCore rstc, Resources res, Context ctx) {
+        super(rstc, "Math Agreement", ctx);
+        mRes = res;
+    }
+
+    private void initializeValues(ScriptC_math_agree s) {
+        Random rand = new Random();
+
+        float x = rand.nextFloat();
+        float y = rand.nextFloat();
+
+        s.set_x(x);
+        s.set_y(y);
+        s.set_result_add(x + y);
+        s.set_result_sub(x - y);
+        s.set_result_mul(x * y);
+        s.set_result_div(x / y);
+    }
+
+    public void run() {
+        RenderScript pRS = RenderScript.create(mCtx);
+        ScriptC_math_agree s = new ScriptC_math_agree(pRS, mRes,
+                R.raw.math_agree);
+        pRS.setMessageHandler(mRsMessage);
+        initializeValues(s);
+        s.invoke_math_agree_test();
+        pRS.finish();
+        waitForMessage();
+        pRS.destroy();
+    }
+}
diff --git a/tests/RenderScriptTests/tests/src/com/android/rs/test/math_agree.rs b/tests/RenderScriptTests/tests/src/com/android/rs/test/math_agree.rs
new file mode 100644
index 0000000..953b9de
--- /dev/null
+++ b/tests/RenderScriptTests/tests/src/com/android/rs/test/math_agree.rs
@@ -0,0 +1,54 @@
+#include "shared.rsh"
+//#pragma rs_fp_relaxed
+
+float x = 0.0f;
+float y = 0.0f;
+float result_add = 0.0f;
+float result_sub = 0.0f;
+float result_mul = 0.0f;
+float result_div = 0.0f;
+
+#define TEST_OP(op, opName)                                             \
+result = x op y;                                                        \
+if (! float_almost_equal(result, result_##opName)) {                    \
+    rsDebug(#opName " did not match!", 0);                              \
+    rsDebug("x = ", x);                                                 \
+    rsDebug("y = ", y);                                                 \
+    rsDebug("Result = ", result);                                       \
+    rsDebug("Expected = ", result_##opName);                            \
+    rsDebug("Difference = ", result - result_##opName);                 \
+    rsDebug("ULP Difference =", float_dist(result, result_##opName));   \
+    failed = true;                                                      \
+}
+
+static bool test_math_agree() {
+    bool failed = false;
+    float result = 0.0;
+
+    TEST_OP(+, add);
+    TEST_OP(-, sub);
+    TEST_OP(*, mul);
+    TEST_OP(/, div);
+
+    if (failed) {
+        rsDebug("test_math_agree FAILED", 0);
+    }
+    else {
+        rsDebug("test_math_agree PASSED", 0);
+    }
+
+    return failed;
+}
+
+void math_agree_test() {
+    bool failed = false;
+    failed |= test_math_agree();
+
+    if (failed) {
+        rsSendToClientBlocking(RS_MSG_TEST_FAILED);
+    }
+    else {
+        rsSendToClientBlocking(RS_MSG_TEST_PASSED);
+    }
+}
+
diff --git a/tests/RenderScriptTests/tests/src/com/android/rs/test/shared.rsh b/tests/RenderScriptTests/tests/src/com/android/rs/test/shared.rsh
index 8cdf0d8..3adc999 100644
--- a/tests/RenderScriptTests/tests/src/com/android/rs/test/shared.rsh
+++ b/tests/RenderScriptTests/tests/src/com/android/rs/test/shared.rsh
@@ -74,6 +74,40 @@ static bool iszero(float f) {
     return isposzero(f) || isnegzero(f);
 }
 
+/* Absolute epsilon used for floats.  Value is similar to float.h. */
+#ifndef FLT_EPSILON
+#define FLT_EPSILON 1.19e7f
+#endif
+/* Max ULPs while still being considered "equal".  Only used when this number
+   of ULPs is of a greater size than FLT_EPSILON. */
+#define FLT_MAX_ULP 1
+
+/* Calculate the difference in ULPs between the two values.  (Return zero on
+   perfect equality.) */
+static int float_dist(float f1, float f2) {
+    return *((int *)(&f1)) - *((int *)(&f2));
+}
+
+/* Check if two floats are essentially equal.  Will fail with some values
+   due to design.  (Validate using FLT_EPSILON or similar if necessary.) */
+static bool float_almost_equal(float f1, float f2) {
+    int *i1 = (int*)(&f1);
+    int *i2 = (int*)(&f2);
+
+    // Check for sign equality
+    if ( ((*i1 >> 31) == 0) != ((*i2 >> 31) == 0) ) {
+        // Handle signed zeroes
+        if (f1 == f2)
+            return true;
+        return false;
+    }
+
+    // Check with ULP distance
+    if (float_dist(f1, f2) > FLT_MAX_ULP)
+        return false;
+    return true;
+}
+
 /* These constants must match those in UnitTest.java */
 static const int RS_MSG_TEST_PASSED = 100;
 static const int RS_MSG_TEST_FAILED = 101;