Add BF16 support to reference model

* Upgrade Eigen to 3.4.0 (for bfloat16 support) and add work-
  arounds for reduce.any() and reduce.all() bugs (introduced
  between 3.3.7 and 3.4.0)
* Truncation to bfloat16 now performed in eval() methods

Signed-off-by: James Ward <james.ward@arm.com>
Signed-off-by: Jeremy Johnson <jeremy.johnson@arm.com>
Change-Id: If5f5c988d76d3d30790acf3b97081726b89205fe

1 files changed, 15 insertions, 1 deletions

diff --git a/verif/tests/test_tosa_refmodel.py b/verif/tests/test_tosa_refmodel.py
index b608fd8..50ff1ab 100644
--- a/verif/tests/test_tosa_refmodel.py
+++ b/verif/tests/test_tosa_refmodel.py
@@ -47,6 +47,7 @@ REF_MODEL_TYPE_TO_OUT = {
     "int32": "i32",
     "fp32": "f32",
     "fp16": "f16",
+    "bf16": "bf16",
 }
 
 
@@ -127,11 +128,13 @@ TEST_PARAMS = [
     ("abs", "int32", 1),
     ("abs", "fp32", 1),
     ("abs", "fp16", 1),
+    ("abs", "bf16", 1),
     ("negate", "int8", 1),
     ("negate", "int16", 1),
     ("negate", "int32", 1),
     ("negate", "fp32", 1),
     ("negate", "fp16", 1),
+    ("negate", "bf16", 1),
     # One test per axis (shape dimensions)
     ("concat", "bool", SHAPE_DIMS),
     ("concat", "int8", SHAPE_DIMS),
@@ -139,6 +142,7 @@ TEST_PARAMS = [
     ("concat", "int32", SHAPE_DIMS),
     ("concat", "fp32", SHAPE_DIMS),
     ("concat", "fp16", SHAPE_DIMS),
+    ("concat", "bf16", SHAPE_DIMS),
 ]
 
 
@@ -165,6 +169,9 @@ def test_refmodel_simple_op(tosaTest):
     # Generate TOSA test(s) (mostly should be single test)
     test_dirs = tosaTest.create_test()
 
+    # Indicate miscellaneous checks to run in tosa_check
+    misc_checks = []
+
     for test_dir in test_dirs:
         # Run ref model
         desc_file = test_dir / TEST_DESC_FILENAME
@@ -227,8 +234,15 @@ def test_refmodel_simple_op(tosaTest):
         np.save(str(result_file), result)
         assert result_file.is_file()
 
+        # Ensure valid bf16
+        if tosaTest.ref_model_type == "bf16":
+            misc_checks.append("bf16")
+
         # Check Numpy result versus refmodel
         check_result, tolerance, msg = tosa_check(
-            str(result_file), str(ofm_file), test_name=test_dir.name
+            str(result_file),
+            str(ofm_file),
+            test_name=test_dir.name,
+            misc_checks=misc_checks,
         )
         assert check_result == TosaResult.PASS