general offload: Add a generic host offload application and add first…

… snDNN gemm kernel setup

target/sim/sw/device/Makefile

@@ -5,7 +5,7 @@
 # Luca Colagrande <colluca@iis.ee.ethz.ch>
 
 # Add user applications to APPS variable
-APPS = offload
+APPS = offload sndnn/gemm axpy
 
 TARGET ?= all
 
@@ -22,5 +22,8 @@ runtime:
 	$(MAKE) -C $@ $(TARGET)
 
 # Explicit dependency of apps on runtime
-$(APP_SUBDIRS): runtime
+$(APP_SUBDIRS): libraries/snDNN runtime
+	$(MAKE) -C $@ $(TARGET)
+
+libraries/snDNN: runtime
 	$(MAKE) -C $@ $(TARGET)

target/sim/sw/device/apps/Makefile

@@ -0,0 +1,28 @@
+# Copyright 2023 ETH Zurich and University of Bologna.
+# Licensed under the Apache License, Version 2.0, see LICENSE for details.
+# SPDX-License-Identifier: Apache-2.0
+#
+# Luca Colagrande <colluca@iis.ee.ethz.ch>
+
+SUBDIRS  = offload
+# SUBDIRS += gemm
+SUBDIRS += axpy
+# SUBDIRS += nop
+# SUBDIRS += blas/axpy
+# SUBDIRS += blas/gemm
+# SUBDIRS += sndnn/batchnorm
+# # SUBDIRS += sndnn/conv2d # fails with exit code 32
+# SUBDIRS += sndnn/fusedconv
+# SUBDIRS += sndnn/gelu
+SUBDIRS += sndnn/gemm
+# # SUBDIRS += sndnn/layernorm # throws illegal instruction in simulation
+# SUBDIRS += sndnn/linear
+# SUBDIRS += sndnn/maxpool
+# # SUBDIRS += sndnn/softmax
+
+.PHONY: all clean $(SUBDIRS)
+
+all: $(SUBDIRS)
+
+$(SUBDIRS):
+	$(MAKE) -C $@ $(TARGET)

target/sim/sw/device/apps/common.mk

@@ -4,18 +4,48 @@
 #
 # Luca Colagrande <colluca@iis.ee.ethz.ch>
 
-include ../../toolchain.mk
+# Usage of absolute paths is required to externally include
+# this Makefile from multiple different locations
+MK_DIR := $(dir $(realpath $(lastword $(MAKEFILE_LIST))))
+include $(MK_DIR)/../toolchain.mk
 
 ###################
 # Build variables #
 ###################
 
+# Fixed paths in repository tree
+ROOT        = $(abspath $(MK_DIR)/../../../../..)
 # Directories
-BUILDDIR    = $(abspath build)
-APPSDIR     = $(abspath ../)
-RUNTIME_DIR = $(abspath ../../runtime)
+APPSDIR     = $(abspath $(MK_DIR)/)
+# RUNTIME_DIR = $(abspath ../../runtime)
+RUNTIME_DIR = $(abspath $(MK_DIR)/../runtime)
 SNRT_DIR    = $(shell bender path snitch_cluster)/sw/snRuntime
-SW_DIR      = $(abspath ../../../)
+# SW_DIR      = $(abspath ../../../)
+SW_DIR      = $(abspath $(MK_DIR)/../../)
+
+#################
+# SNDNN_LIBRARY #
+#################
+ifdef USE_SNDNN_LIBRARY
+SNDNN_DIR    := $(shell bender path snitch_cluster)/sw/snDNN
+SNDNN_LIB_DIR := $(abspath $(MK_DIR)/../libraries/snDNN)
+SNDNN_LIB_NAME = snDNN
+
+# Dependencies
+INCDIRS += $(SNDNN_LIB_DIR)/src
+INCDIRS += $(SNDNN_DIR)/src
+INCDIRS += $(SNDNN_DIR)/include
+# Linker script
+# RISCV_LDFLAGS += -L$(abspath $(SNDNN_LIB_DIR))
+# Link snRuntime library
+RISCV_LDFLAGS += -L$(abspath $(SNDNN_LIB_DIR)/build/)
+RISCV_LDFLAGS += -l$(SNDNN_LIB_NAME)
+BUILDDIR    = $(abspath $(MK_DIR)/sndnn/$(APP)/build)
+SNDNN_LIB   = $(realpath $(SNDNN_LIB_DIR)/build/lib$(SNDNN_LIB_NAME).a)
+LD_SRCS    += $(SNDNN_LIB)
+else
+BUILDDIR    = $(abspath $(MK_DIR)/$(APP)/build)
+endif
 
 # Dependencies
 INCDIRS += $(RUNTIME_DIR)/src
@@ -83,7 +113,7 @@ $(DEP): $(SRCS) | $(BUILDDIR)
 	$(RISCV_CC) $(RISCV_CFLAGS) -MM -MT '$(ELF)' $< > $@
 
 $(ELF): $(DEP) $(LD_SRCS) | $(BUILDDIR)
-	$(RISCV_CC) $(RISCV_CFLAGS) $(RISCV_LDFLAGS) $(SRCS) -o $@
+	$(RISCV_CC) $(RISCV_CFLAGS) $(SRCS) $(RISCV_LDFLAGS) -o $@
 
 $(BIN): $(ELF) | $(BUILDDIR)
 	$(RISCV_OBJCOPY) $(OBJCOPY_FLAGS) $< $@

target/sim/sw/device/apps/sndnn/Makefile

@@ -0,0 +1,34 @@
+# Copyright 2023 ETH Zurich and University of Bologna.
+# Licensed under the Apache License, Version 2.0, see LICENSE for details.
+# SPDX-License-Identifier: Apache-2.0
+#
+# Gianna Paulin <pauling@iis.ee.ethz.ch>
+
+# Usage of absolute paths is required to externally include this Makefile
+MK_DIR        := $(dir $(realpath $(lastword $(MAKEFILE_LIST))))
+DATA_DIR      := $(realpath $(MK_DIR)/data)
+SRC_DIR       := $(realpath $(MK_DIR)/$(APP_NAME)/src)
+SNDNN_DIR     := $(shell bender path snitch_cluster)/sw/snDNN/)
+SNDNN_LIB_DIR := $(realpath $(MK_DIR)/../../libraries/snDNN/)
+# SNDNN_SRC_DIR := $(shell bender path snitch_cluster)/sw/snDNN/src)
+
+INCLUDE_DIR  = $(realpath $(SNDNN_DIR)/include)
+INCLUDE_DIR += $(realpath $(SNDNN_DIR)/src)
+INCLUDE_DIR += $(realpath $(SNDNN_LIB_DIR)/src)
+
+DATA_CFG ?= $(DATA_DIR)/$(APP_NAME)_params.hjson
+
+APP     ?= $(APP_NAME)
+SRCS    += $(realpath $(SRC_DIR)/net_$(APP_NAME).c)
+# SRCS    += $(realpath $(SNDNN_LIB_DIR)/src/sndnn.c)
+INCDIRS += $(DATA_DIR) $(SRC_DIR) $(INCLUDE_DIR)
+
+$(DATA_DIR)/data_$(APP_NAME).h: $(MK_DIR)/datagen.py $(DATA_CFG)
+	$< -c $(DATA_CFG) > $@
+
+.PHONY: clean-data clean
+
+clean-data:
+	rm -f $(DATA_DIR)/data_$(APP_NAME).h
+
+clean: clean-data

target/sim/sw/device/apps/sndnn/data/gemm_params.hjson

@@ -0,0 +1,17 @@
+// Copyright 2020 ETH Zurich and University of Bologna.
+// Solderpad Hardware License, Version 0.51, see LICENSE for details.
+// SPDX-License-Identifier: SHL-0.51
+
+// Parameters for a GEMM
+
+{
+    kernel: "GEMM"
+    M: 16,
+    N: 16,
+    K: 16,
+    alpha: 0,
+    transpose_A: false,
+    transpose_B: true,
+    prec: 32,
+    expand: 0
+}