JSTests/wasm/function-tests/load-offset.js

import Builder from '../Builder.js'
import * as assert from '../assert.js'

{
    const builder = (new Builder())
        .Type().End()
        .Import()
            .Memory("imp", "mem", {initial: 1})
        .End()
        .Function().End()
        .Export().Function("foo").End()
        .Code()
            .Function("foo", {params: ["i32"], ret: "i32"})
                .GetLocal(0)
                .I32Load(2, 4)
                .Return()
            .End()
        .End();

    const bin = builder.WebAssembly().get();
    const module = new WebAssembly.Module(bin);
    const memory = new WebAssembly.Memory({initial: 1});
    const instance = new WebAssembly.Instance(module, {imp: {mem: memory}});
    
    const number = 0x0abbccdd;
    (new Uint32Array(memory.buffer))[1] = number;
    assert.eq(instance.exports.foo(0), number);
}

{
    const builder = (new Builder())
        .Type().End()
        .Import()
            .Memory("imp", "mem", {initial: 1})
        .End()
        .Function().End()
        .Export().Function("foo").End()
        .Code()
            .Function("foo", {params: ["i32"], ret: "i32"})
                .GetLocal(0)
                .I64Load32U(2, 4)
                .I64Popcnt()
                .I32WrapI64()
                .Return()
            .End()
        .End();

    const bin = builder.WebAssembly().get();
    const module = new WebAssembly.Module(bin);
    const memory = new WebAssembly.Memory({initial: 1});
    const instance = new WebAssembly.Instance(module, {imp: {mem: memory}});
    
    const number = 2**32 - 1;
    (new Uint32Array(memory.buffer))[1] = number;
    assert.eq(instance.exports.foo(0), 32);
}

{
    const builder = (new Builder())
        .Type().End()
        .Import()
            .Memory("imp", "mem", {initial: 1})
        .End()
        .Function().End()
        .Export().Function("foo").End()
        .Code()
            .Function("foo", {params: ["i32"], ret: "i32"})
                .GetLocal(0)
                .I64Load32S(2, 4)
                .I64Popcnt()
                .I32WrapI64()
                .Return()
            .End()
        .End();

    const bin = builder.WebAssembly().get();
    const module = new WebAssembly.Module(bin);
    const memory = new WebAssembly.Memory({initial: 1});
    const instance = new WebAssembly.Instance(module, {imp: {mem: memory}});
    
    const number = 2**32 - 1;
    (new Uint32Array(memory.buffer))[1] = number;
    assert.eq(instance.exports.foo(0), 64);
}

{
    const builder = (new Builder())
        .Type().End()
        .Import()
            .Memory("imp", "mem", {initial: 1})
        .End()
        .Function().End()
        .Export().Function("foo").End()
        .Code()
            .Function("foo", {params: ["i32"], ret: "i32"})
                .GetLocal(0)
                .I64Load(2, 4)
                .I64Popcnt()
                .I32WrapI64()
                .Return()
            .End()
        .End();

    const bin = builder.WebAssembly().get();
    const module = new WebAssembly.Module(bin);
    const memory = new WebAssembly.Memory({initial: 1});
    const instance = new WebAssembly.Instance(module, {imp: {mem: memory}});
    
    const number = 2**32 - 1;
    (new Uint32Array(memory.buffer))[1] = number;
    (new Uint32Array(memory.buffer))[2] = 0xff00ff00;
    assert.eq(instance.exports.foo(0), 32 + 16);
}

{
    const builder = (new Builder())
        .Type().End()
        .Import()
            .Memory("imp", "mem", {initial: 1})
        .End()
        .Function().End()
        .Export().Function("foo").End()
        .Code()
            .Function("foo", {params: ["i32"], ret: "f32"})
                .GetLocal(0)
                .F32Load(2, 4)
                .Return()
            .End()
        .End();

    const bin = builder.WebAssembly().get();
    const module = new WebAssembly.Module(bin);
    const memory = new WebAssembly.Memory({initial: 1});
    const instance = new WebAssembly.Instance(module, {imp: {mem: memory}});
    
    const number = Math.PI;
    (new Float32Array(memory.buffer))[1] = number;
    assert.eq(instance.exports.foo(0), Math.fround(number));
}

{
    const builder = (new Builder())
        .Type().End()
        .Import()
            .Memory("imp", "mem", {initial: 1})
        .End()
        .Function().End()
        .Export().Function("foo").End()
        .Code()
            .Function("foo", {params: ["i32"], ret: "f64"})
                .GetLocal(0)
                .F64Load(2, 8)
                .Return()
            .End()
        .End();

    const bin = builder.WebAssembly().get();
    const module = new WebAssembly.Module(bin);
    const memory = new WebAssembly.Memory({initial: 1});
    const instance = new WebAssembly.Instance(module, {imp: {mem: memory}});
    
    const number = Math.PI;
    (new Float64Array(memory.buffer))[1] = number;
    assert.eq(instance.exports.foo(0), number);
}