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// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --expose-wasm
const stdlib = {
Math: Math,
Int8Array: Int8Array,
Int16Array: Int16Array,
Int32Array: Int32Array,
Uint8Array: Uint8Array,
Uint16Array: Uint16Array,
Uint32Array: Uint32Array,
Float32Array: Float32Array,
Float64Array: Float64Array,
};
const buffer = new ArrayBuffer(65536);
const BASE = 1000000000;
const OOB_INDEXES = [
buffer.byteLength,
buffer.byteLength + 1,
buffer.byteLength + 2,
buffer.byteLength + 3,
buffer.byteLength + 4,
buffer.byteLength + 5,
buffer.byteLength + 6,
buffer.byteLength + 7,
buffer.byteLength + 8,
buffer.byteLength + 9,
buffer.byteLength + 10,
0x80000000,
0x80000004,
0xF0000000,
0xFFFFFFFF,
0xFFFFFFFE,
-1, -2, -3, -4, -5, -6, -7, -8
];
function resetBuffer() {
var view = new Int32Array(buffer);
for (var i = 0; i < view.length; i++) {
view[i] = BASE | (i << 2);
}
}
resetBuffer();
function checkView(view, load, shift) {
for (var i = 0; i < 300; i++) {
assertEquals(view[i >> shift], load(i));
}
}
function RunThreeWayTest(asmfunc, expect) {
var asm_source = asmfunc.toString();
var nonasm_source = asm_source.replace(new RegExp("use asm"), "");
var js_module = eval("(" + nonasm_source + ")")(stdlib, {}, buffer);
print("Testing " + asmfunc.name + " (js)...");
expect(js_module);
print("Testing " + asmfunc.name + " (asm.js)...");
var asm_module = asmfunc(stdlib, {}, buffer);
expect(asm_module);
print("Testing " + asmfunc.name + " (wasm)...");
var wasm_module = Wasm.instantiateModuleFromAsm(asm_source, null, buffer);
expect(wasm_module);
}
function LoadAt_i32(stdlib, foreign, buffer) {
"use asm";
var HEAP32 = new stdlib.Int32Array(buffer);
function load(a) {
a = a | 0;
return HEAP32[a >> 2] | 0;
}
return {load: load};
}
RunThreeWayTest(LoadAt_i32, function(module) {
var load = module.load;
assertEquals(BASE, load(0));
assertEquals(BASE | 0x30, load(0x30));
assertEquals(BASE | 0x704, load(0x704));
assertEquals(BASE | 0x704, load(0x705));
assertEquals(BASE | 0x704, load(0x706));
assertEquals(BASE | 0x704, load(0x707));
var length = buffer.byteLength;
assertEquals(BASE | (length - 4), load(length - 4));
assertEquals(BASE | (length - 4), load(length - 4 + 1));
assertEquals(BASE | (length - 4), load(length - 4 + 2));
assertEquals(BASE | (length - 4), load(length - 4 + 3));
for (index of OOB_INDEXES) assertEquals(0, load(index));
checkView(new Int32Array(buffer), load, 2);
});
function LoadAt_i16(stdlib, foreign, buffer) {
"use asm";
var HEAP16 = new stdlib.Int16Array(buffer);
function load(a) {
a = a | 0;
return HEAP16[a >> 1] | 0;
}
return {load: load};
}
RunThreeWayTest(LoadAt_i16, function(module) {
var load = module.load;
var LOWER = (BASE << 16) >> 16;
var UPPER = BASE >> 16;
assertEquals(LOWER, load(0));
assertEquals(UPPER, load(2));
assertEquals(LOWER | 0x30, load(0x30));
assertEquals(UPPER, load(0x32));
assertEquals(LOWER | 0x504, load(0x504));
assertEquals(LOWER | 0x504, load(0x505));
assertEquals(UPPER, load(0x706));
assertEquals(UPPER, load(0x707));
var length = buffer.byteLength;
assertEquals(LOWER | (length - 4), load(length - 4));
assertEquals(LOWER | (length - 4), load(length - 4 + 1));
assertEquals(UPPER, load(length - 4 + 2));
assertEquals(UPPER, load(length - 4 + 3));
for (index of OOB_INDEXES) assertEquals(0, load(index));
checkView(new Int16Array(buffer), load, 1);
});
function LoadAt_u16(stdlib, foreign, buffer) {
"use asm";
var HEAP16 = new stdlib.Uint16Array(buffer);
function load(a) {
a = a | 0;
return HEAP16[a >> 1] | 0;
}
return {load: load};
}
RunThreeWayTest(LoadAt_u16, function(module) {
var load = module.load;
for (index of OOB_INDEXES) assertEquals(0, load(index));
checkView(new Uint16Array(buffer), load, 1);
});
function LoadAt_i8(stdlib, foreign, buffer) {
"use asm";
var HEAP8 = new stdlib.Int8Array(buffer);
function load(a) {
a = a | 0;
return HEAP8[a >> 0] | 0;
}
return {load: load};
}
RunThreeWayTest(LoadAt_i8, function(module) {
var load = module.load;
for (index of OOB_INDEXES) assertEquals(0, load(index));
checkView(new Int8Array(buffer), load, 0);
});
function LoadAt_u8(stdlib, foreign, buffer) {
"use asm";
var HEAP8 = new stdlib.Uint8Array(buffer);
function load(a) {
a = a | 0;
return HEAP8[a >> 0] | 0;
}
return {load: load};
}
RunThreeWayTest(LoadAt_u8, function(module) {
var load = module.load;
for (index of OOB_INDEXES) assertEquals(0, load(index));
checkView(new Uint8Array(buffer), load, 0);
});
function LoadAt_u32(stdlib, foreign, buffer) {
"use asm";
var HEAP32 = new stdlib.Uint32Array(buffer);
function load(a) {
a = a | 0;
return +(HEAP32[a >> 2] >>> 0);
}
return {load: load};
}
RunThreeWayTest(LoadAt_u32, function(module) {
var load = module.load;
for (index of OOB_INDEXES) assertEquals(0, load(index));
checkView(new Uint32Array(buffer), load, 2);
});
function LoadAt_f32(stdlib, foreign, buffer) {
"use asm";
var HEAP32 = new stdlib.Float32Array(buffer);
var fround = stdlib.Math.fround;
function load(a) {
a = a | 0;
return fround(HEAP32[a >> 2]);
}
return {load: load};
}
RunThreeWayTest(LoadAt_f32, function(module) {
var load = module.load;
for (index of OOB_INDEXES) assertEquals(NaN, load(index));
checkView(new Float32Array(buffer), load, 2);
});
function LoadAt_f64(stdlib, foreign, buffer) {
"use asm";
var HEAP64 = new stdlib.Float64Array(buffer);
function load(a) {
a = a | 0;
return +HEAP64[a >> 3];
}
return {load: load};
}
RunThreeWayTest(LoadAt_f64, function(module) {
var load = module.load;
for (index of OOB_INDEXES) assertEquals(NaN, load(index));
checkView(new Float64Array(buffer), load, 3);
});
// TODO(titzer): constant heap indexes
// TODO(titzer): heap accesses with offsets and arithmetic
// TODO(titzer): [i >> K] where K is greater than log(size)
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