#!/usr/bin/env bash

# Copyright lowRISC contributors.
# Licensed under the Apache License, Version 2.0, see LICENSE for details.
# SPDX-License-Identifier: Apache-2.0

# This script drives the experimental Ibex synthesis flow. More details can be
# found in README.md

set -e
set -o pipefail

error () {
    echo >&2 "$@"
    exit 1
}

teelog () {
    tee "$LR_SYNTH_OUT_DIR/log/$1.log"
}

if [ ! -f syn_setup.sh ]; then
    error "No syn_setup.sh file: see README.md for instructions"
fi

#-------------------------------------------------------------------------
# setup flow variables
#-------------------------------------------------------------------------
source syn_setup.sh

#-------------------------------------------------------------------------
# use sv2v to convert all SystemVerilog files to Verilog
#-------------------------------------------------------------------------

LR_DEP_SOURCES=(
    "../vendor/lowrisc_ip/ip/prim/rtl/prim_count.sv"
    "../vendor/lowrisc_ip/ip/prim/rtl/prim_secded_inv_39_32_dec.sv"
    "../vendor/lowrisc_ip/ip/prim/rtl/prim_secded_inv_39_32_enc.sv"
    "../vendor/lowrisc_ip/ip/prim/rtl/prim_lfsr.sv"
    "../vendor/lowrisc_ip/ip/prim_generic/rtl/prim_and2.sv"
    "../vendor/lowrisc_ip/ip/prim_generic/rtl/prim_buf.sv"
    "../vendor/lowrisc_ip/ip/prim_generic/rtl/prim_clock_mux2.sv"
    "../vendor/lowrisc_ip/ip/prim_generic/rtl/prim_flop.sv"
)

mkdir -p "$LR_SYNTH_OUT_DIR/generated"
mkdir -p "$LR_SYNTH_OUT_DIR/log"
mkdir -p "$LR_SYNTH_OUT_DIR/reports/timing"

# Convert dependency sources
for file in "${LR_DEP_SOURCES[@]}"; do
    module=$(basename -s .sv "$file")

    sv2v \
        --define=SYNTHESIS --define=YOSYS \
        ../vendor/lowrisc_ip/ip/prim/rtl/prim_count_pkg.sv \
        ../vendor/lowrisc_ip/ip/prim/rtl/prim_cipher_pkg.sv \
        -I../vendor/lowrisc_ip/ip/prim/rtl \
        "$file" \
        > "$LR_SYNTH_OUT_DIR"/generated/"${module}".v
    # Make sure auto-generated primitives are resolved to generic primitives
    # where available.
    sed -i 's/prim_and2/prim_generic_and2/g' "$LR_SYNTH_OUT_DIR"/generated/"${module}".v
    sed -i 's/prim_buf/prim_generic_buf/g'  "$LR_SYNTH_OUT_DIR"/generated/"${module}".v
    sed -i 's/prim_clock_mux2/prim_generic_clock_mux2/g'  "$LR_SYNTH_OUT_DIR"/generated/"${module}".v
    sed -i 's/prim_flop/prim_generic_flop/g' "$LR_SYNTH_OUT_DIR"/generated/"${module}".v
done

# Convert core sources
for file in ../rtl/*.sv; do
  module=$(basename -s .sv "$file")

  # Skip packages
  if echo "$module" | grep -q '_pkg$'; then
      continue
  fi

  sv2v \
    --define=SYNTHESIS --define=YOSYS \
    ../rtl/*_pkg.sv \
    ../vendor/lowrisc_ip/ip/prim_generic/rtl/prim_ram_1p_pkg.sv \
    ../vendor/lowrisc_ip/ip/prim/rtl/prim_secded_pkg.sv \
    ../vendor/lowrisc_ip/ip/prim/rtl/prim_util_pkg.sv \
    -I../vendor/lowrisc_ip/ip/prim/rtl \
    -I../vendor/lowrisc_ip/dv/sv/dv_utils \
    "$file" \
    > "$LR_SYNTH_OUT_DIR"/generated/"${module}".v

# Make sure auto-generated primitives are resolved to generic primitives
# where available.
  sed -i 's/prim_and2/prim_generic_and2/g' "$LR_SYNTH_OUT_DIR"/generated/"${module}".v
  sed -i 's/prim_buf/prim_generic_buf/g'  "$LR_SYNTH_OUT_DIR"/generated/"${module}".v
  sed -i 's/prim_clock_mux2/prim_generic_clock_mux2/g'  "$LR_SYNTH_OUT_DIR"/generated/"${module}".v
  sed -i 's/prim_flop/prim_generic_flop/g' "$LR_SYNTH_OUT_DIR"/generated/"${module}".v
done

# remove tracer (not needed for synthesis)
rm -f "$LR_SYNTH_OUT_DIR"/generated/ibex_tracer.v

# remove the FPGA & register-based register file (because we will use the
# latch-based one instead)
rm -f "$LR_SYNTH_OUT_DIR"/generated/ibex_register_file_ff.v
rm -f "$LR_SYNTH_OUT_DIR"/generated/ibex_register_file_fpga.v

yosys -c ./tcl/yosys_run_synth.tcl |& teelog syn || {
    error "Failed to synthesize RTL with Yosys"
}

sta ./tcl/sta_run_reports.tcl |& teelog sta || {
    error "Failed to run static timing analysis"
}

./translate_timing_rpts.sh

python/get_kge.py "$LR_SYNTH_CELL_LIBRARY_PATH" "$LR_SYNTH_OUT_DIR"/reports/area.rpt