Add float16 elements to C++ API

Bug: 25972767

Add float16 elements to C++ API and test the ability to create float16
allocations.

Caveats:
- Element::F16 and such are accessible to the host-side code
  irrespective of the target API level.  This is because right now,
  target API level seems to be set at runtime instead of compile time.
- We added float16 to RenderScript starting API level 23.  Since we
  cannot compile RS CPP apps targeting this level, Scripts cannot
  manipulate float16 data yet.

Change-Id: I2bfba13fcad1c3aa984e97b44765fd2a57a054ac
(cherry picked from commit 566168431399086c146b2f845f6d0128852c9686)

1 files changed, 41 insertions, 0 deletions

diff --git a/tests/cppf16/compute.cpp b/tests/cppf16/compute.cpp
new file mode 100644
index 00000000..d39466d8
--- /dev/null
+++ b/tests/cppf16/compute.cpp
@@ -0,0 +1,41 @@
+#include "RenderScript.h"
+
+using namespace android;
+using namespace RSC;
+
+static const uint32_t dimX = 7, dimY = 5, dimZ = 3;
+
+void testAllocationCreation(sp<RS> rs, sp<const Element> e, uint32_t nDims) {
+    Type::Builder tb(rs, e);
+    tb.setX(dimX);
+    if (nDims >= 2)
+        tb.setY(dimY);
+    if (nDims >= 3)
+        tb.setZ(dimZ);
+
+    sp<const Type> t = tb.create();
+    sp<Allocation> alloc = Allocation::createTyped(rs, t);
+}
+
+int main(int , char** )
+{
+    sp<RS> rs = new RS();
+
+    bool r = rs->init("/system/bin");
+
+    // Test ability to create 1D, 2D and 3D allocations of f16 scalars and
+    // vectors
+    sp<const Element> half = Element::F16(rs);
+    sp<const Element> half2 = Element::F16_2(rs);
+    sp<const Element> half3 = Element::F16_3(rs);
+    sp<const Element> half4 = Element::F16_4(rs);
+
+    for (uint32_t nDims = 1; nDims <= 3; nDims ++) {
+        testAllocationCreation(rs, half, nDims);
+        testAllocationCreation(rs, half2, nDims);
+        testAllocationCreation(rs, half3, nDims);
+        testAllocationCreation(rs, half4, nDims);
+    }
+
+    printf("Test successful!");
+}