cb7976bbf6
Within each function that launches tasks, we now can easily track which tasks that function launched, so that the sync at the end of the function can just sync on the tasks launched by that function (not all tasks launched by all functions.) Implementing this led to a rework of the task system API that ispc generates code to call; the example task systems in examples/tasksys.cpp have been updated to conform to this API. (The updated API is also documented in the ispc user's guide.) As part of this, "launch[n]" syntax was added to launch a number of tasks in a single launch statement, rather than requiring a loop over 'n' to launch n tasks. This commit thus fixes issue #84 (enhancement to launch multiple tasks from a single launch statement) as well as issue #105 (recursive task launches were broken).
============================== Intel(r) SPMD Program Compiler ============================== Welcome to the Intel(r) SPMD Program Compiler (ispc)! ispc is a new compiler for "single program, multiple data" (SPMD) programs. Under the SPMD model, the programmer writes a program that mostly appears to be a regular serial program, though the execution model is actually that a number of program instances execute in parallel on the hardware. ispc compiles a C-based SPMD programming language to run on the SIMD units of CPUs; it frequently provides a a 3x or more speedup on CPUs with 4-wide SSE units, without any of the difficulty of writing intrinsics code. ispc is an open source compiler under the BSD license; see the file LICENSE.txt. ispc supports Windows, Mac, and Linux, with both x86 and x86-64 targets. It currently supports the SSE2, SSE4, and AVX instruction sets. For more information and examples, as well as a wiki and the bug database, see the ispc distribution site, http://ispc.github.com.