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WASM: Crude println implementation with the wasm-native strings

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This commit is contained in:
Igor Laevsky
2021-07-23 20:42:48 +03:00
committed by TeamCityServer
parent fc0ae851a2
commit ebde1e5491
3 changed files with 17 additions and 15 deletions
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compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/compiler.kt
+13 -11
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@@ -95,6 +95,8 @@ fun compileWasm(
fun WasmCompiledModuleFragment.generateJs(): String {
val runtime = """
var wasmInstance = null;
const runtime = {
String_getChar(str, index) {
return str.charCodeAt(index);
@@ -130,19 +132,19 @@ fun WasmCompiledModuleFragment.generateJs(): String {
return x;
},
println(value) {
console.log(">>> " + value)
},
importStringToJs(addr, wasmMem) {
const mem16 = new Uint16Array(wasmMem.buffer);
const mem32 = new Int32Array(wasmMem.buffer);
const len = mem32[addr / 4];
const str_start_addr = (addr + 4) / 2
const slice = mem16.slice(str_start_addr, str_start_addr + len);
return String.fromCharCode.apply(null, slice);
println(valueAddr) {
console.log(">>> " + importStringToJs(valueAddr));
}
};
function importStringToJs(addr) {
const mem16 = new Uint16Array(wasmInstance.exports.memory.buffer);
const mem32 = new Int32Array(wasmInstance.exports.memory.buffer);
const len = mem32[addr / 4];
const str_start_addr = (addr + 4) / 2;
const slice = mem16.slice(str_start_addr, str_start_addr + len);
return String.fromCharCode.apply(null, slice);
}
""".trimIndent()
val jsCode =