[OpenVINO backend] Added support for numpy.isclose operation (#21138)

* Added decomposition for numpy.isclose

* Removed test from excluded list

* Fixed failed test cases

* Fixed dtype error

Author: hridaya14

keras/src/backend/openvino/excluded_concrete_tests.txt

@@ -23,7 +23,6 @@ NumpyDtypeTest::test_flip
 NumpyDtypeTest::test_floor
 NumpyDtypeTest::test_hstack
 NumpyDtypeTest::test_inner
-NumpyDtypeTest::test_isclose
 NumpyDtypeTest::test_isfinite
 NumpyDtypeTest::test_isinf
 NumpyDtypeTest::test_isnan
@@ -149,7 +148,6 @@ NumpyTwoInputOpsCorrectnessTest::test_digitize
 NumpyTwoInputOpsCorrectnessTest::test_divide_no_nan
 NumpyTwoInputOpsCorrectnessTest::test_einsum
 NumpyTwoInputOpsCorrectnessTest::test_inner
-NumpyTwoInputOpsCorrectnessTest::test_isclose
 NumpyTwoInputOpsCorrectnessTest::test_linspace
 NumpyTwoInputOpsCorrectnessTest::test_logspace
 NumpyTwoInputOpsCorrectnessTest::test_outer

keras/src/backend/openvino/numpy.py

@@ -850,9 +850,22 @@ def imag(x):
 
 
 def isclose(x1, x2, rtol=1e-5, atol=1e-8, equal_nan=False):
-    raise NotImplementedError(
-        "`isclose` is not supported with openvino backend"
-    )
+    dtype = OPENVINO_DTYPES[config.floatx()]
+
+    x1 = ov_opset.convert(get_ov_output(x1), dtype)
+    x2 = ov_opset.convert(get_ov_output(x2), dtype)
+    rtol = ov_opset.convert(get_ov_output(rtol), dtype)
+    atol = ov_opset.convert(get_ov_output(atol), dtype)
+
+    abs_diff = ov_opset.abs(x1 - x2)
+    abs_x2 = ov_opset.abs(x2)
+    total_tolerance = atol + rtol * abs_x2
+    is_close = ov_opset.less_equal(abs_diff, total_tolerance)
+    if equal_nan:
+        both_nan = ov_opset.logical_and(ov_opset.isnan(x1), ov_opset.isnan(x2))
+        is_close = ov_opset.logical_or(is_close, both_nan)
+
+    return OpenVINOKerasTensor(is_close.output(0))
 
 
 def isfinite(x):