7099d635ee
The shl(sar(x, K), K) is a common pattern with typed loads/stores in asm.js. TEST=compiler-unittests,mjsunit/asm/int32array-unaligned R=jarin@chromium.org Review URL: https://codereview.chromium.org/598083007 git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24238 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
44 lines
987 B
JavaScript
44 lines
987 B
JavaScript
// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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function Module(stdlib, foreign, heap) {
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"use asm";
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var MEM32 = new stdlib.Int32Array(heap);
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function load(i) {
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i = i|0;
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i = MEM32[i >> 2] | 0;
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return i;
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}
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function store(i, v) {
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i = i|0;
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v = v|0;
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MEM32[i >> 2] = v;
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}
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return { load: load, store: store };
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}
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var m = Module(this, {}, new ArrayBuffer(1024));
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m.store(0, 0x12345678);
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m.store(4, -1);
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m.store(8, -1);
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for (var i = 0; i < 4; ++i) {
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assertEquals(0x12345678, m.load(i));
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}
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for (var i = 4; i < 12; ++i) {
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assertEquals(-1, m.load(i));
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}
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for (var j = 4; j < 8; ++j) {
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m.store(j, 0x11223344);
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for (var i = 0; i < 4; ++i) {
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assertEquals(0x12345678, m.load(i));
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}
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for (var i = 4; i < 8; ++i) {
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assertEquals(0x11223344, m.load(i));
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}
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for (var i = 8; i < 12; ++i) {
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assertEquals(-1, m.load(i));
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}
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}
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