Targetcode

The targetcode repository contains C and assembly source code intended to run on the target (Rigel). This includes libraries and application code.

./include

Rigel standard headers, which are installed to ${RIGEL_INSTALL}/target/include/

./lib

./lib includes several libraries which are installed to ${RIGEL_INSTALL}/target/lib:

• libc, libm, and a syscalls library, based on newlib 1.19.
• a thread-caching malloc implementation based on nedmalloc
• libpthread, an implementation of a subset of POSIX Threads thread management, thread-local storage, mutexes, and condition variables
• compiler-rt, an LLVM project providing the runtime functions the compiler uses to support double-precision floating point, 64-bit integer arithmetic, C99 complex arithmetic, and unaligned loads and stores. We have also adapted compiler-rt's implementation of Blocks , a language extension to C, Objective-C, and C++ that implements a type of closure.
• libpar, a library implementing the Rigel Task Model (RTM) task-based programming model
• taskmodel-x86, an incomplete port of the RTM programming model to x86/Linux using pthreads to enable faster development or validation of RTM-based programs via execution on the host machine
• linker, a place to put linker scripts for laying out and aligning Rigel binaries
• rigel-crt0-mp.S, the startup code run by all Rigel binaries before jumping into newlib's pre-main() setup code. The primary function of this file is to set stack pointers for all threads in the system.

./src

./src includes :

• a small set of data- and task-parallel benchmarks
• test codes useful for evaluating the correctness and performance of library and compiler features
• Makefile.common with environment variables and compiler toolchain flags.

Currently included benchmarks are:

• fft, a 2D Danielson-Lanczos-based Complex-to-Complex Fast Fourier Transform. This benchmark comes with a test data and golden output generator, fft_host, based on FFTW3. The simulator's output can be checked against the golden output using fpdiff, a tool for comparing binary files of single-precision floats with user-specified tolerance.

• march, an implementation of Marching Cubes scalar field isosurface polygonization. This parallel implementation is based on a serial implementation by Paul Bourke and Cory Bloyd. This benchmark comes with a tool to convert volume data as found in the Stanford volume data archive to a binary format suitable for Rigel, as well as a tool to convert RigelSim's list of output triangles into a [.obj]http://en.wikipedia.org/wiki/Wavefront_.obj_file) file suitable for viewing. Our sample data set, a CT image of the head, comes from the UNC Volume Rendering Test Data Set by way of the Stanford volume data archive.

• stencil, a 3D 7-point stencil computation modeling, for example, heat diffusion over time in 3D.