From 9c027956ca51023cfc9414bafd9516b95113f888 Mon Sep 17 00:00:00 2001
From: unmeshna <unmeshna@cadence.com>
Date: Fri, 11 Sep 2026 00:24:54 -0700
Subject: [PATCH] Bump Xtensa NNLib to 09_03_2026 and enable hifi_iq download

Updates the hifi4 and hifi5 NNLib package links (and MD5s) to the 09_03_2026 release, and adds hifi_iq download support: a new hifi_iq branch in xtensa_download.sh and a matching hifi_iq target block in xtensa.inc.
---
 .../lite/micro/tools/make/ext_libs/xtensa.inc | 34 +++++++++++++++++++
 .../tools/make/ext_libs/xtensa_download.sh    | 16 +++++----
 2 files changed, 44 insertions(+), 6 deletions(-)

diff --git a/tensorflow/lite/micro/tools/make/ext_libs/xtensa.inc b/tensorflow/lite/micro/tools/make/ext_libs/xtensa.inc
index c3237cf8253..3c499464e74 100644
--- a/tensorflow/lite/micro/tools/make/ext_libs/xtensa.inc
+++ b/tensorflow/lite/micro/tools/make/ext_libs/xtensa.inc
@@ -8,6 +8,40 @@ ifeq ($(TARGET_ARCH), hifimini)
   THIRD_PARTY_CC_HDRS += \
     $(shell find $(FFT_PATH)/hifi2_fft -name "*.h")
 
+else ifeq ($(TARGET_ARCH), hifi_iq)
+  DOWNLOAD_RESULT := $(shell $(MAKEFILE_DIR)/ext_libs/xtensa_download.sh ${DOWNLOADS_DIR} hifi_iq $(TENSORFLOW_ROOT))
+  ifneq ($(DOWNLOAD_RESULT), SUCCESS)
+    $(error Something went wrong with the xtensa download: $(DOWNLOAD_RESULT))
+  endif
+
+  PLATFORM_FLAGS = \
+    -Wno-shadow\
+
+  CCFLAGS += $(PLATFORM_FLAGS)
+  CXXFLAGS += $(PLATFORM_FLAGS)
+
+  NNLIB_PATH := $(MAKEFILE_DIR)/downloads/xa_nnlib_hifi_iq
+
+  THIRD_PARTY_KERNEL_CC_SRCS += \
+    $(shell find $(NNLIB_PATH) -name "*.c")
+
+  EXCLUDED_NNLIB_SRCS = \
+    $(NNLIB_PATH)/algo/layers/cnn/src/xa_nn_cnn_api.c \
+    $(NNLIB_PATH)/algo/layers/gru/src/xa_nn_gru_api.c \
+    $(NNLIB_PATH)/algo/layers/lstm/src/xa_nn_lstm_api.c \
+
+  THIRD_PARTY_KERNEL_CC_SRCS := $(filter-out $(EXCLUDED_NNLIB_SRCS), $(THIRD_PARTY_KERNEL_CC_SRCS))
+
+  THIRD_PARTY_CC_HDRS += \
+    $(shell find $(NNLIB_PATH) -name "*.h") \
+
+  INCLUDES += \
+    -I$(NNLIB_PATH)/ \
+    -I$(NNLIB_PATH)/algo/kernels/ \
+    -I$(NNLIB_PATH)/include/nnlib/ \
+    -I$(NNLIB_PATH)/include/ \
+    -I$(NNLIB_PATH)/algo/common/include/ \
+
 else ifeq ($(TARGET_ARCH), hifi5)
   DOWNLOAD_RESULT := $(shell $(MAKEFILE_DIR)/ext_libs/xtensa_download.sh ${DOWNLOADS_DIR} hifi5 $(TENSORFLOW_ROOT))
   ifneq ($(DOWNLOAD_RESULT), SUCCESS)
diff --git a/tensorflow/lite/micro/tools/make/ext_libs/xtensa_download.sh b/tensorflow/lite/micro/tools/make/ext_libs/xtensa_download.sh
index 391eaf12f4c..9c5be928a98 100755
--- a/tensorflow/lite/micro/tools/make/ext_libs/xtensa_download.sh
+++ b/tensorflow/lite/micro/tools/make/ext_libs/xtensa_download.sh
@@ -41,17 +41,21 @@ DOWNLOADS_DIR=${1}
 PATCH=""
 
 if [[ ${2} == "hifi3" ]]; then
-  LIBRARY_URL="http://github.com/foss-xtensa/nnlib-hifi4/raw/master/archive/xa_nnlib_hifi4_09_30_2025.zip"
+  LIBRARY_URL="http://github.com/foss-xtensa/nnlib-hifi4/raw/master/archive/xa_nnlib_hifi4_09_03_2026.zip"
   LIBRARY_DIRNAME="xa_nnlib_hifi4"
-  LIBRARY_MD5="a1cba57501a35d0bffdd39c536689366"
+  LIBRARY_MD5="69537cd86952b02aa6ed566d4a6f0c08"
 elif [[ ${2} == "hifi4" ]]; then
-  LIBRARY_URL="http://github.com/foss-xtensa/nnlib-hifi4/raw/master/archive/xa_nnlib_hifi4_09_30_2025.zip"
+  LIBRARY_URL="http://github.com/foss-xtensa/nnlib-hifi4/raw/master/archive/xa_nnlib_hifi4_09_03_2026.zip"
   LIBRARY_DIRNAME="xa_nnlib_hifi4"
-  LIBRARY_MD5="a1cba57501a35d0bffdd39c536689366"
+  LIBRARY_MD5="69537cd86952b02aa6ed566d4a6f0c08"
 elif [[ ${2} == "hifi5" ]]; then
-  LIBRARY_URL="http://github.com/foss-xtensa/nnlib-hifi5/raw/master/archive/xa_nnlib_hifi5_09_30_2025.zip"
+  LIBRARY_URL="http://github.com/foss-xtensa/nnlib-hifi5/raw/master/archive/xa_nnlib_hifi5_09_03_2026.zip"
   LIBRARY_DIRNAME="xa_nnlib_hifi5"
-  LIBRARY_MD5="f3ac445ae47143b1fddf26b85d763697"
+  LIBRARY_MD5="2fbe7a4459609f257b43fb1d2cdc2339"
+elif [[ ${2} == "hifi_iq" ]]; then
+  LIBRARY_URL="http://github.com/foss-xtensa/nnlib-hifi_iq/raw/main/archive/xa_nnlib_hifi_iq_09_03_2026.zip"
+  LIBRARY_DIRNAME="xa_nnlib_hifi_iq"
+  LIBRARY_MD5="050f2e27b5b68068a3b4d00a1b449013"
 elif [[ ${2} == "vision_p6" ]]; then
   LIBRARY_URL="https://github.com/foss-xtensa/tflmlib_vision/raw/main/archive/xi_tflmlib_vision_p6_22_06_29.zip"
   LIBRARY_DIRNAME="xi_tflmlib_vision_p6"