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Fix n-body visualization
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‎README.md‎

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@@ -70,10 +70,8 @@ Examples
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* **[WASM parser](./lib/parse)**<br />
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A WebAssembly binary parser in WebAssembly.
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Benchmarks
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---------
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* **[n-body](./examples/n-body)**<br />
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Compare performance and produced binary size with n-body example from Computer Language Benchmarks Game.
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* **[N-body system](./examples/n-body)** [ [demo](https://rawgit.com/AssemblyScript/assemblyscript/master/examples/n-body/index.html) ]<br />
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An implementation of the N-body system from the [Computer Language Benchmarks Game](https://benchmarksgame-team.pages.debian.net/benchmarksgame/).
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Building
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--------

‎dist/asc.js‎

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‎dist/asc.js.map‎

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‎dist/assemblyscript.js‎

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‎dist/assemblyscript.js.map‎

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‎examples/n-body/README.md‎

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@@ -1,4 +1,4 @@
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N-Body-System
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N-body system
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=============
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An [AssemblyScript](http://assemblyscript.org) example. This is actually a benchmark - visualizing it just so happened.

‎examples/n-body/assembly/index.ts‎

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@@ -203,3 +203,8 @@ export function step(): float {
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export function bench(steps: u32): void {
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for (let i: u32 = 0; i < steps; ++i) system.advance(0.01);
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}
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export function getBody(index: i32): Body | null {
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var bodies = system.bodies;
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return <u32>index < <u32>bodies.length ? bodies[index] : null;
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}

‎examples/n-body/build/index.asm.js‎

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Original file line numberDiff line numberDiff line change
@@ -477,6 +477,19 @@ function asmFunc(global, env, buffer) {
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};
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}
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function assembly_index_getBody($0) {
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$0 = $0 | 0;
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var $1 = 0, $22 = 0, $20 = 0;
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$1 = HEAPU32[assembly_index_system >> 2] | 0;
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if ($0 >>> 0 < (HEAP32[($1 + 4 | 0) >> 2] | 0) >>> 0) {
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$1 = HEAPU32[$1 >> 2] | 0;
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if ($0 >>> 0 < ((HEAP32[$1 >> 2] | 0) >>> 2 | 0) >>> 0) $20 = HEAPU32[(($1 + ($0 << 2 | 0) | 0) + 8 | 0) >> 2] | 0; else abort();
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$22 = $20;
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} else $22 = 0;
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$0 = $22;
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return $0 | 0;
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}
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function start() {
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$lib_allocator_arena_startOffset = 40;
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$lib_allocator_arena_offset = $lib_allocator_arena_startOffset;
@@ -521,6 +534,7 @@ function asmFunc(global, env, buffer) {
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}),
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init: assembly_index_init,
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step: assembly_index_step,
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bench: assembly_index_bench
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bench: assembly_index_bench,
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getBody: assembly_index_getBody
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};
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}

‎examples/n-body/build/optimized.wasm‎

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‎examples/n-body/build/optimized.wat‎

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@@ -19,6 +19,7 @@
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(export "init" (func $assembly/index/init))
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(export "step" (func $assembly/index/step))
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(export "bench" (func $assembly/index/bench))
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(export "getBody" (func $assembly/index/getBody))
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(start $start)
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(func $~lib/allocator/arena/__memory_allocate (; 1 ;) (type $ii) (param $0 i32) (result i32)
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(local $1 i32)
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)
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)
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)
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(func $start (; 11 ;) (type $v)
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(func $assembly/index/getBody (; 11 ;) (type $ii) (param $0 i32) (result i32)
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(local $1 i32)
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(tee_local $0
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(if (result i32)
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(i32.lt_u
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(get_local $0)
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(i32.load offset=4
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(tee_local $1
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(i32.load
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(get_global $assembly/index/system)
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)
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)
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)
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)
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(if (result i32)
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(i32.lt_u
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(get_local $0)
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(i32.shr_u
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(i32.load
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(tee_local $1
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(i32.load
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(get_local $1)
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)
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)
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)
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(i32.const 2)
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)
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)
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(i32.load offset=8
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(i32.add
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(get_local $1)
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(i32.shl
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(get_local $0)
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(i32.const 2)
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)
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)
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)
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(unreachable)
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)
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(i32.const 0)
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)
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)
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)
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(func $start (; 12 ;) (type $v)
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(set_global $~lib/allocator/arena/startOffset
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(i32.const 40)
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)

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