[RenderScript] Utility functions to generate random Float16 Allocations.
http://b/23536224
The numbers are randomly generated in the range [MIN_NORMAL, 16.0]. To
include negative numbers, about half of the generated numbers are
negated.
Some special Float16 values are also substituted randomly. Extreme
values are included when corresponding parameter is set.
Change-Id: I827bea2945387ccdac4704bb5ba1db978cab2d05
diff --git a/tests/tests/renderscript/src/android/renderscript/cts/RSBaseCompute.java b/tests/tests/renderscript/src/android/renderscript/cts/RSBaseCompute.java
index 0ba8248..384e41c 100644
--- a/tests/tests/renderscript/src/android/renderscript/cts/RSBaseCompute.java
+++ b/tests/tests/renderscript/src/android/renderscript/cts/RSBaseCompute.java
@@ -80,6 +80,8 @@
element = Element.F64(rs);
} else if (dataType == Element.DataType.FLOAT_32) {
element = Element.F32(rs);
+ } else if (dataType == Element.DataType.FLOAT_16) {
+ element = Element.F16(rs);
} else if (dataType == Element.DataType.SIGNED_64) {
element = Element.I64(rs);
} else if (dataType == Element.DataType.UNSIGNED_64) {
@@ -125,6 +127,12 @@
float max = 4.0f * (float) Math.PI;
RSUtils.genRandomFloats(seed, min, max, inArray, includeExtremes);
alloc.copy1DRangeFrom(0, INPUTSIZE, inArray);
+ } else if (dataType == Element.DataType.FLOAT_16) {
+ short[] inArray = new short[INPUTSIZE * width];
+ short min = 1024; // 0x0400 in hex, 2^-14, i.e. float16 MIN_NORMAL
+ short max = 19456; // 0x4c00 in hex, 16.0 in float16
+ RSUtils.genRandomFloat16s(seed, min, max, inArray, includeExtremes);
+ alloc.copyFrom(inArray);
} else if (dataType == Element.DataType.SIGNED_64) {
long[] inArray = new long[INPUTSIZE * width];
RSUtils.genRandomLongs(seed, inArray, true, 63);
diff --git a/tests/tests/renderscript/src/android/renderscript/cts/RSUtils.java b/tests/tests/renderscript/src/android/renderscript/cts/RSUtils.java
index 6038d90..e7524a6 100644
--- a/tests/tests/renderscript/src/android/renderscript/cts/RSUtils.java
+++ b/tests/tests/renderscript/src/android/renderscript/cts/RSUtils.java
@@ -41,6 +41,23 @@
-Math.PI * 2.0,
};
+ // Constants E, PI etc. are set to their nearest representations in Float16.
+ private static final short[] sInterestingFloat16s = {
+ (short) 0x0, // zero
+ (short) 0x3c00, // one
+ (short) 0x4170, // E, 2.71875000000
+ (short) 0x4248, // PI, 3.14062500000
+ (short) 0x3e48, // PI / 2, 1.57031250000
+ (short) 0x4648, // PI * 2, 6.28125000000
+
+ (short) 0x8000, // negative zero
+ (short) 0xbc00, // negative one
+ (short) 0xc170, // -E, -2.71875000000
+ (short) 0xc248, // -PI, -3.14062500000
+ (short) 0xbe48, // -PI / 2, -1.57031250000
+ (short) 0xc648, // -PI * 2, -6.28125000000
+ };
+
/**
* Fills the array with random doubles. Values will be between min (inclusive) and
* max (inclusive).
@@ -143,6 +160,37 @@
}
}
+ public static void genRandomFloat16s(long seed, short min, short max, short array[],
+ boolean includeExtremes) {
+ Random r = new Random(seed);
+ short range = (short) (max - min + 1);
+ for (int i = 0; i < array.length; i ++) {
+ array[i] = (short) (min + r.nextInt(range));
+ }
+ array[r.nextInt(array.length)] = min;
+ array[r.nextInt(array.length)] = max;
+
+ // Negate approximately half of the elements.
+ for (int i = 0; i < array.length; i ++) {
+ if (r.nextBoolean()) {
+ array[i] = (short) (0x8000 | array[i]);
+ }
+ }
+
+ for (short s : sInterestingFloat16s) {
+ array[r.nextInt(array.length)] = s;
+ }
+ if (includeExtremes) {
+ array[r.nextInt(array.length)] = (short) 0x7c01; // NaN
+ array[r.nextInt(array.length)] = (short) 0x7c00; // POSITIVE_INFINITY
+ array[r.nextInt(array.length)] = (short) 0xfc00; // NEGATIVE_INFINITY
+ array[r.nextInt(array.length)] = (short) 0x0400; // MIN_NORMAL, 0.00006103516
+ array[r.nextInt(array.length)] = (short) 0x7bff; // MAX_VALUE, 65504
+ array[r.nextInt(array.length)] = (short) 0x8400; // -MIN_NORMAL, -0.00006103516
+ array[r.nextInt(array.length)] = (short) 0xfbff; // -MAX_VALUE, -65504
+ }
+ }
+
/**
* Fills the array with random ints. Values will be between min (inclusive) and
* max (inclusive).
