wamr_decode.sh

#!/bin/bash
set -e

help() {
	echo "Configure decode.c and WAMR compiler with libpng WASM target."
	echo "Use the WAMR compiler to compile decode.wasm to decode.aot for"
	echo "usage with the WAMR iwasm VM core."
	echo 
	echo "Syntax: bash wasm_decode.sh [-h|s]"
	echo "options:"
	echo "h    Print this help menu."
	echo "s    Run with WASM SIMD128 instructions enabled for libpng library"
	echo
}

while getopts "hs" OPTION
do
	case $OPTION in
		h) help
				exit;;
		s) simd=true
				echo "simd enabled...";;
	esac
done

SCRIPT=$(readlink -f "$0")
SCRIPT_PATH=$(dirname "$SCRIPT")
  
echo "compiling decode.c to WASM..."
if [[ "$simd" = true ]]; then 
	CFLAGS="-O3 -msimd128" \
	LDFLAGS="-Wl,--export-all -Wl,--growable-table" \
	${WASI_SDK_PATH}/bin/clang \
	--sysroot ${WASI_SDK_PATH}/share/wasi-sysroot \
	-I${WASI_SDK_PATH}/share/wasi-sysroot/include/libpng16 \
	-I${SIMDE_PATH}/simde/wasm \
	-L${WASI_SDK_PATH}/share/wasi-sysroot/lib \
	-o out/decode_simd.wasm \
	decode.c \
	-lpng16 -lz 
else 
	LDFLAGS="-Wl,--export-all -Wl,--growable-table" \
	${WASI_SDK_PATH}/bin/clang \
	--sysroot ${WASI_SDK_PATH}/share/wasi-sysroot \
	-I${WASI_SDK_PATH}/share/wasi-sysroot/include/libpng16 \
	-L${WASI_SDK_PATH}/share/wasi-sysroot/lib \
	-o out/decode_no_simd.wasm \
	decode.c \
	-lpng16 -lz 
fi 

# Extraneous step - only for checking WASM code
echo "converting .wasm to .wat..."
if [[ "$simd" = true ]]; then
	${WABT_PATH}/build/wasm2wat -o out/decode_simd.wat out/decode_simd.wasm
else 
	${WABT_PATH}/build/wasm2wat -o out/decode_nosimd.wat out/decode_no_simd.wasm
fi

echo "rebuilding WAMR..."
if [[ "$simd" = true ]]; then 
	cd ${WAMR_PATH}/wamr-compiler/build 
	cmake .. -DWAMR_BUILD_SIMD=1
	make 
	cd ${SCRIPT_PATH}
else 
	cd ${WAMR_PATH}/wamr-compiler/build 
	cmake .. -DWAMR_BUILD_SIMD=0
	make 
	cd ${SCRIPT_PATH}
fi

echo "compiling to AOT with wamrc..."
if [[ "$simd" = true ]]; then 
	${WAMR_PATH}/wamr-compiler/build/wamrc \
	-o out/decode_simd.aot \
	out/decode_simd.wasm
else 
	${WAMR_PATH}/wamr-compiler/build/wamrc \
	--disable-simd \
	-o out/decode_nosimd.aot \
	out/decode_no_simd.wasm
fi 

echo "done"