brigio345 / SILVIA

Overview:

SILVIA is a set of LLVM transformation passes to automatically identify superword-level parallelism within an HLS FPGA design and exploit it by packing multiple operations, such as additions, multiplications, and multiply-and-adds, into a single DSP.

Build:

Build and install LLVM 3.1:

source install_llvm.sh

Build and install the SILVIA LLVM passes:

source build_pass.sh

Use:

Update a standard Vitis HLS build script according to:

+ source ${SILVIA_ROOT}/scripts/SILVIA.tcl
open_project ${PROJ_NAME}
open_solution ${SOL_NAME}
add_files ${SOURCE_FILES}
set_top ${TOP_NAME}
- csynth_design
+ set SILVIA::PASSES \
+ [list [dict create OP "muladd"] \
+ [dict create OP "add" OP_SIZE 12]]
+ SILVIA::csynth_design
export_design