Add hexagon target to build and run Qualcomm hexagon binaries.

PiperOrigin-RevId: 290851597
Change-Id: I07e3a61d0151f118ed16357c288da17c8eb2e0f1

tensorflow/lite/micro/testing/test_hexagon_binary.sh

@@ -0,0 +1,39 @@
+#!/bin/bash -e
+# Copyright 2020 The TensorFlow Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ==============================================================================
+#
+# Tests a Qualcomm Hexagon binary by parsing the log output.
+#
+# First argument is the binary location.
+# Second argument is a regular expression that's required to be in the output
+# logs for the test to pass.
+
+declare -r ROOT_DIR=`pwd`
+declare -r TEST_TMPDIR=/tmp/test_hexagon_binary/
+declare -r MICRO_LOG_PATH=${TEST_TMPDIR}/$1
+declare -r MICRO_LOG_FILENAME=${MICRO_LOG_PATH}/logs.txt
+mkdir -p ${MICRO_LOG_PATH}
+
+hexagon-elfcopy $1 $1.elf
+hexagon-sim $1.elf 2>&1 | tee ${MICRO_LOG_FILENAME}
+
+if grep -q "$2" ${MICRO_LOG_FILENAME}
+then
+  echo "$1: PASS"
+  exit 0
+else
+  echo "$1: FAIL - '$2' not found in logs."
+  exit 1
+fi

tensorflow/lite/micro/tools/make/targets/hexagon_makefile.inc

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+# Settings for Hexagon toolchain.
+ifeq ($(TARGET), hexagon)
+  TARGET_ARCH := hexagon
+
+  PLATFORM_ARGS = \
+    -DHEXAGON_ASM \
+    -DMALLOC_IN_STDLIB \
+    -DMICRO_NN_ENABLED=1 \
+    -DMICRO_TFLITE_ENABLED=0 \
+    -DNDEBUG \
+    -DPTHREAD_STUBS \
+    -DTF_LITE_STATIC_MEMORY \
+    -DUSE_PREALLOCATED_BUFFER \
+    -D_HAS_C9X \
+    -MMD \
+    -O3 -DNDEBUG -DHEXAGON \
+    -Wall \
+    -Wextra \
+    -Wno-missing-field-initializers \
+    -Wno-sign-compare \
+    -Wno-unused-parameter \
+    -Wno-write-strings \
+    -Wvla \
+    -fdata-sections -ffunction-sections \
+    -fdata-sections \
+    -ffunction-sections \
+    -fmessage-length=0 \
+    -fno-builtin \
+    -fno-builtin \
+    -fno-builtin \
+    -fno-delete-null-pointer-checks \
+    -fno-exceptions \
+    -fno-register-global-dtors-with-atexit \
+    -fno-rtti \
+    -fno-short-enums \
+    -fno-threadsafe-statics \
+    -fno-unwind-tables \
+    -fno-use-cxa-atexit \
+    -fomit-frame-pointer \
+    -fpermissive \
+    -funsigned-char \
+    -mcpu=v66 \
+    -mv66
+
+  TARGET_TOOLCHAIN_PREFIX := hexagon-
+  CXX_TOOL := clang++
+  CC_TOOL := clang
+
+  CXXFLAGS = $(PLATFORM_ARGS) -std=c++11
+  CCFLAGS = $(PLATFORM_ARGS) -std=c11
+  LDFLAGS += \
+    -Wl,--gc-sections -lhexagon
+
+  INCLUDES += \
+    -I$(HEXAGON_SDK_PREFIX)/libs/common/qurt/computev66/include/posix \
+    -I$(HEXAGON_SDK_PREFIX)/libs/common/qurt/computev66/include/qurt
+
+  TEST_SCRIPT := tensorflow/lite/micro/testing/test_hexagon_binary.sh
+
+  # These are microcontroller-specific rules for converting the ELF output
+  # of the linker into a binary image that can be loaded directly.
+  OBJCOPY := $(TARGET_TOOLCHAIN_PREFIX)objcopy
+
+  $(BINDIR)/%.bin: $(BINDIR)/%
+	  @mkdir -p $(dir $@)
+	  $(OBJCOPY) $< $@ -O binary
+endif