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For loop, that GPU can be better then CPU

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This commit is contained in:
Eugene Cheah 2016-01-24 13:07:04 +08:00
parent 12d8c8152b
commit af01fc2a2b
4 changed files with 81 additions and 8 deletions
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12
demo/gpu.html
View File

@ -102,14 +102,20 @@ function f(mode) {
var a = [];
var b = [];
for(var n = 0; n < _length; n++) {
var randA = Math.random()/100.0;
var randB = Math.random()/100.0;
var randA = Math.random()*100.0;
var randB = Math.random()*100.0;
a.push(randA);
b.push(randB);
}
var f = GPU(function(a, b) {
return Math.sqrt( Math.pow( a[this.thread.x] , b[this.thread.x] ) );
var res = 0.0;
var i = 0.0;
for(i = 0.0; i < 200000; ++i) {
res += Math.sqrt( Math.pow( a[this.thread.x] , b[this.thread.x] ) );
}
return res;
}, {
thread : [2048],
mode : mode

10
src/js-to-webclgl.js
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@ -314,14 +314,14 @@ var GPU_jsStrToWebclglStr = (function() {
if (forNode.type != "ForStatement") {
throw "error";
}
retArr.push("for (float");
ast_generic(forNode.init, retArr);
retArr.push("for (float ");
ast_generic(forNode.init, retArr, stateParam);
retArr.push(";");
ast_generic(forNode.test, retArr);
ast_generic(forNode.test, retArr, stateParam);
retArr.push(";");
ast_generic(forNode.update, retArr);
ast_generic(forNode.update, retArr, stateParam);
retArr.push(")");
ast_generic(forNode.body, retArr);
ast_generic(forNode.body, retArr, stateParam);
return retArr;
}

28
test/html/basic_for_loop.html Normal file
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@ -0,0 +1,28 @@
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>GPU.JS : Basic Sum AB</title>
<link rel="stylesheet" href="../lib/qunit-1.20.0.css">
<!-- webclgl scripts -->
<script src="../../lib/webclgl/WebCLGLUtils.class.js"></script>
<script src="../../lib/webclgl/WebCLGLBuffer.class.js"></script>
<script src="../../lib/webclgl/WebCLGLBufferItem.class.js"></script>
<script src="../../lib/webclgl/WebCLGLKernel.class.js"></script>
<script src="../../lib/webclgl/WebCLGLKernelProgram.class.js"></script>
<script src="../../lib/webclgl/WebCLGL.class.js"></script>
<!-- gpu.js scripts -->
<script src="../../src/js-fallback.js"></script>
<script src="../../src/webclgl-js-parser.js"></script>
<script src="../../src/js-to-webclgl.js"></script>
<script src="../../src/gpu.js"></script>
</head>
<body>
<div id="qunit"></div>
<div id="qunit-fixture"></div>
<script src="../lib/qunit-1.20.0.js"></script>
<script src="../src/basic_for_loop.js"></script>
</body>
</html>

39
test/src/basic_for_loop.js Normal file
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@ -0,0 +1,39 @@
function basic_for_loop_test( assert, mode ) {
var f = GPU(function(a, b) {
var x = 0.0;
var i = 0.0;
for(i = 0.0; i<10.0; ++i) {
x = x + 1.0;
}
return (a[this.thread.x] + b[this.thread.x] + x);
}, {
thread : [6],
block : [1],
mode : mode
});
assert.ok( f !== null, "function generated test");
var a = [1, 2, 3, 5, 6, 7];
var b = [4, 5, 6, 1, 2, 3];
var res = f(a,b);
var exp = [15, 17, 19, 16, 18, 20];
for(var i = 0; i < exp.length; ++i) {
QUnit.close(exp[i], res[i], 0.1, "Result arr idx: "+i);
}
}
QUnit.test( "basic_for_loop (auto)", function( assert ) {
basic_for_loop_test(assert, null);
});
QUnit.test( "basic_for_loop (GPU)", function( assert ) {
basic_for_loop_test(assert, "gpu");
});
QUnit.test( "basic_for_loop (CPU)", function( assert ) {
basic_for_loop_test(assert, "cpu");
});