[Keras 3 OpenVINO Backend]: Support numpy.log1p operation #29487 (#21129)

* Supports numpy.log1p operation

* Applied api-gen hook modifications

* Revert "Applied api-gen hook modifications"

This reverts commit 2b880fa.

* Excluded Concrete Tests

* Put Blank Line

Author: victorgearhead

keras/src/backend/openvino/excluded_concrete_tests.txt

@@ -27,7 +27,6 @@ NumpyDtypeTest::test_isfinite
 NumpyDtypeTest::test_isinf
 NumpyDtypeTest::test_isnan
 NumpyDtypeTest::test_linspace
-NumpyDtypeTest::test_log1p
 NumpyDtypeTest::test_logaddexp
 NumpyDtypeTest::test_logspace
 NumpyDtypeTest::test_matmul_
@@ -88,7 +87,6 @@ NumpyOneInputOpsCorrectnessTest::test_hstack
 NumpyOneInputOpsCorrectnessTest::test_imag
 NumpyOneInputOpsCorrectnessTest::test_isfinite
 NumpyOneInputOpsCorrectnessTest::test_isinf
-NumpyOneInputOpsCorrectnessTest::test_log1p
 NumpyOneInputOpsCorrectnessTest::test_logaddexp
 NumpyOneInputOpsCorrectnessTest::test_max
 NumpyOneInputOpsCorrectnessTest::test_mean

keras/src/backend/openvino/numpy.py

@@ -938,7 +938,17 @@ def log10(x):
 
 
 def log1p(x):
-    raise NotImplementedError("`log1p` is not supported with openvino backend")
+    x = get_ov_output(x)
+    x_type = x.get_element_type()
+
+    if x_type.is_integral():
+        x_type = OPENVINO_DTYPES[config.floatx()]
+        x = ov_opset.convert(x, x_type)
+
+    one_const = ov_opset.constant(1, x_type).output(0)
+    added = ov_opset.add(x, one_const).output(0)
+    result = ov_opset.log(added).output(0)
+    return OpenVINOKerasTensor(result)
 
 
 def log2(x):