[serialization_lib] Add support for FP8E4M3 and FP8E5M2

Signed-off-by: Won Jeon <won.jeon@arm.com>
Signed-off-by: Tai Ly <tai.ly@arm.com>
Change-Id: Ife50592890be020b6c6122581eeb2175c8f331e0

4 files changed, 30 insertions, 8 deletions

diff --git a/include/tosa_generated.h b/include/tosa_generated.h
index 2ecd35a..b5a8bd5 100644
--- a/include/tosa_generated.h
+++ b/include/tosa_generated.h
@@ -116,11 +116,13 @@ enum DType : uint32_t {
   DType_FP16 = 10,
   DType_BF16 = 11,
   DType_SHAPE = 12,
+  DType_FP8E4M3 = 13,
+  DType_FP8E5M2 = 14,
   DType_MIN = DType_UNKNOWN,
-  DType_MAX = DType_SHAPE
+  DType_MAX = DType_FP8E5M2
 };
 
-inline const DType (&EnumValuesDType())[13] {
+inline const DType (&EnumValuesDType())[15] {
   static const DType values[] = {
     DType_UNKNOWN,
     DType_BOOL,
@@ -134,13 +136,15 @@ inline const DType (&EnumValuesDType())[13] {
     DType_UINT16,
     DType_FP16,
     DType_BF16,
-    DType_SHAPE
+    DType_SHAPE,
+    DType_FP8E4M3,
+    DType_FP8E5M2
   };
   return values;
 }
 
 inline const char * const *EnumNamesDType() {
-  static const char * const names[14] = {
+  static const char * const names[16] = {
     "UNKNOWN",
     "BOOL",
     "UINT8",
@@ -154,13 +158,15 @@ inline const char * const *EnumNamesDType() {
     "FP16",
     "BF16",
     "SHAPE",
+    "FP8E4M3",
+    "FP8E5M2",
     nullptr
   };
   return names;
 }
 
 inline const char *EnumNameDType(DType e) {
-  if (::flatbuffers::IsOutRange(e, DType_UNKNOWN, DType_SHAPE)) return "";
+  if (::flatbuffers::IsOutRange(e, DType_UNKNOWN, DType_FP8E5M2)) return "";
   const size_t index = static_cast<size_t>(e);
   return EnumNamesDType()[index];
 }
diff --git a/python/serializer/tosa_serializer.py b/python/serializer/tosa_serializer.py
index c44b225..1aadbff 100644
--- a/python/serializer/tosa_serializer.py
+++ b/python/serializer/tosa_serializer.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2020-2023, ARM Limited.
+# Copyright (c) 2020-2024, ARM Limited.
 #
 #    Licensed under the Apache License, Version 2.0 (the "License");
 #    you may not use this file except in compliance with the License.
@@ -63,6 +63,8 @@ DTypeNames = [
     "FP16",
     "BF16",
     "SHAPE",
+    "FP8E4M3",
+    "FP8E5M2",
 ]
 
 ByteMask = np.uint64(0xFF)
@@ -425,7 +427,12 @@ class TosaSerializerTensor:
         self.shape = shape
         self.dtype = dtype
 
-        if dtype == DType.FP32 or dtype == DType.BF16:
+        if (
+            dtype == DType.FP32
+            or dtype == DType.BF16
+            or dtype == DType.FP8E4M3
+            or dtype == DType.FP8E5M2
+        ):
             fntype = np.float32
         elif dtype == DType.FP16:
             fntype = np.float16
@@ -525,7 +532,12 @@ class TosaSerializerTensor:
             elif self.dtype == DType.FP16:
                 np_arr = np.array(self.data, dtype=np.float16)
                 u8_data.extend(np_arr.view(np.uint8))
-            elif self.dtype == DType.FP32 or self.dtype == DType.BF16:
+            elif (
+                self.dtype == DType.FP32
+                or self.dtype == DType.BF16
+                or self.dtype == DType.FP8E4M3
+                or self.dtype == DType.FP8E5M2
+            ):
                 # for val in self.data:
                 #     b = struct.pack("!f", val)
                 #     u8_data.extend([b[3], b[2], b[1], b[0]])
diff --git a/python/tosa/DType.py b/python/tosa/DType.py
index 6df2dcb..e585cb9 100644
--- a/python/tosa/DType.py
+++ b/python/tosa/DType.py
@@ -16,3 +16,5 @@ class DType(object):
     FP16 = 10
     BF16 = 11
     SHAPE = 12
+    FP8E4M3 = 13
+    FP8E5M2 = 14
diff --git a/schema/tosa.fbs b/schema/tosa.fbs
index 171818d..1c2a85e 100644
--- a/schema/tosa.fbs
+++ b/schema/tosa.fbs
@@ -37,6 +37,8 @@ enum DType:uint32 {
   FP16,
   BF16,
   SHAPE,
+  FP8E4M3,
+  FP8E5M2,
 }
 
 enum ResizeMode:uint32 {