Support for all primitive types from array. (#7003)

* Change C API name.
* Test for all primitive types from array.
* Add native support for CPU 128 float.
* Convert boolean and float16 in Python.

* Fix dask version for now.

tests/python/test_predict.py

@@ -237,3 +237,51 @@ class TestInplacePredict:
         dtrain = xgb.DMatrix(self.X, self.y, base_margin=base_margin)
         from_dmatrix = booster.predict(dtrain)
         np.testing.assert_allclose(from_dmatrix, from_inplace)
+
+    def test_dtypes(self):
+        orig = self.rng.randint(low=0, high=127, size=self.rows * self.cols).reshape(
+            self.rows, self.cols
+        )
+        predt_orig = self.booster.inplace_predict(orig)
+        # all primitive types in numpy
+        for dtype in [
+            np.signedinteger,
+            np.byte,
+            np.short,
+            np.intc,
+            np.int_,
+            np.longlong,
+            np.unsignedinteger,
+            np.ubyte,
+            np.ushort,
+            np.uintc,
+            np.uint,
+            np.ulonglong,
+            np.floating,
+            np.half,
+            np.single,
+            np.double,
+        ]:
+            X = np.array(orig, dtype=dtype)
+            predt = self.booster.inplace_predict(X)
+            np.testing.assert_allclose(predt, predt_orig)
+
+        # boolean
+        orig = self.rng.binomial(1, 0.5, size=self.rows * self.cols).reshape(
+            self.rows, self.cols
+        )
+        predt_orig = self.booster.inplace_predict(orig)
+        for dtype in [np.bool8, np.bool_]:
+            X = np.array(orig, dtype=dtype)
+            predt = self.booster.inplace_predict(X)
+            np.testing.assert_allclose(predt, predt_orig)
+
+        # unsupported types
+        for dtype in [
+            np.string_,
+            np.complex64,
+            np.complex128,
+        ]:
+            X = np.array(orig, dtype=dtype)
+            with pytest.raises(ValueError):
+                self.booster.inplace_predict(X)