Add FFT2d to the reference model

Includes:
* FFT2d reference implementation
* Basic TOSA tests

Change-Id: Ie79fcb713542345d550ec013646810c1e890e388
Signed-off-by: Luke Hutton <luke.hutton@arm.com>

1 files changed, 62 insertions, 2 deletions

diff --git a/verif/generator/tosa_error_if.py b/verif/generator/tosa_error_if.py
index 93f975d..ee227b3 100644
--- a/verif/generator/tosa_error_if.py
+++ b/verif/generator/tosa_error_if.py
@@ -79,6 +79,8 @@ class ErrorIf(object):
     CondIfCondShapeNotSizeOne = "CondIfCondShapeNotSizeOne"
     CondGraphOutputShapeNotSizeOne = "CondGraphOutputShapeNotSizeOne"
     KernelNotPowerOfTwo = "KernelNotPowerOfTwo"
+    FFTInputShapeMismatch = "FFTInputShapeMismatch"
+    FFTOutputShapeMismatch = "FFTOutputShapeMismatch"
 
 
 class TosaErrorIfArgGen:
@@ -562,7 +564,7 @@ class TosaErrorValidator:
                 ):
                     error_result = True
 
-            elif op["op"] == Op.RFFT2D:
+            elif op["op"] in [Op.FFT2D, Op.RFFT2D]:
                 if not all([ty == input_dtype for ty in output_dtype]):
                     error_result = True
 
@@ -686,7 +688,7 @@ class TosaErrorValidator:
             op = kwargs["op"]
             output_list = kwargs["output_list"]
             expected_length = 1
-            if op["op"] == Op.RFFT2D:
+            if op["op"] in [Op.FFT2D, Op.RFFT2D]:
                 expected_length = 2
 
             if len(output_list) != expected_length:
@@ -2446,6 +2448,64 @@ class TosaErrorValidator:
         }
         return info_dict
 
+    @staticmethod
+    def evFFTInputShapeMismatch(check=False, **kwargs):
+        error_name = ErrorIf.FFTInputShapeMismatch
+        param_reqs = {"rank": None, "dtype": None, "shape": None}
+        error_result = False
+        error_reason = "Mismatch between real and imaginary input shapes"
+
+        if check:
+            input1 = kwargs["input1"]
+            input2 = kwargs["input2"]
+
+            if input1.shape != input2.shape:
+                error_result = True
+
+        info_dict = {
+            "error_name": error_name,
+            "error_result": error_result,
+            "error_reason": error_reason,
+            "param_reqs": param_reqs,
+        }
+        return info_dict
+
+    @staticmethod
+    def evFFTOutputShapeMismatch(check=False, **kwargs):
+        error_name = ErrorIf.FFTOutputShapeMismatch
+        param_reqs = {"rank": None, "dtype": None, "shape": None}
+        error_result = False
+        error_reason = (
+            "Mismatch between provided and expected output kernel (H, W) shape"
+        )
+
+        if check:
+            op = kwargs["op"]
+            input_shape = kwargs["input_shape"]
+
+            if len(input_shape) == 3:
+                output_shapes = kwargs["output_shape"]
+
+                # Ignoring batch size (N) from input shape
+                expected_shape = input_shape[1:]
+                if op["op"] == Op.RFFT2D:
+                    expected_shape[1] = expected_shape[1] // 2 + 1
+
+                # Ignoring batch size (N) from output shapes
+                output_shape_0 = output_shapes[0][1:]
+                output_shape_1 = output_shapes[1][1:]
+                # Ensure sure the kernel sizes (H, W) of both outputs match the expected
+                if output_shape_0 != output_shape_1 or output_shape_0 != expected_shape:
+                    error_result = True
+
+        info_dict = {
+            "error_name": error_name,
+            "error_result": error_result,
+            "error_reason": error_reason,
+            "param_reqs": param_reqs,
+        }
+        return info_dict
+
 
 class TosaInvalidValidator:
     @staticmethod