f22dec54ef
Wasm opcodes only need one byte plus a 24-bit selector for prefixed instructions. Store them in u32 instead of u64 and reject selectors that would not fit. Update the Rust opcode generator to accept the new integer suffixes used by Opcode.h.
66 lines
2 KiB
Rust
66 lines
2 KiB
Rust
/*
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* Copyright (c) 2026-present, the Ladybird developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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use std::env;
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use std::error::Error;
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use std::fmt::Write;
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use std::path::{Path, PathBuf};
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fn generate_opcodes(manifest_dir: &Path, out_dir: &Path) -> Result<(), Box<dyn Error>> {
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let opcode_h = manifest_dir.join("../Opcode.h");
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println!("cargo:rerun-if-changed={}", opcode_h.display());
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let contents = std::fs::read_to_string(&opcode_h)?;
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let mut output = String::new();
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// Grab name and value from _M(name, value, pops, pushes)_ lines
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let re = regex::Regex::new(r"M\(\s*(\w+)\s*,\s*(0x[0-9a-fA-F]+)(?:[uUlL]+)?\s*,")?;
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for cap in re.captures_iter(&contents) {
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let cpp_name = &cap[1];
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let value = &cap[2];
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// Drop "structured_" and trailing underscrores, then uppercase the whole thing.
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let mut name = cpp_name.to_string();
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if let Some(stripped) = name.strip_prefix("structured_") {
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name = stripped.to_string();
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}
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if let Some(stripped) = name.strip_suffix('_') {
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name = stripped.to_string();
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}
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let name = name.to_uppercase();
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writeln!(output, "pub const {name}: u64 = {value};")?;
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}
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std::fs::write(out_dir.join("opcodes.rs"), output)?;
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Ok(())
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}
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fn main() -> Result<(), Box<dyn Error>> {
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let manifest_dir = PathBuf::from(env::var("CARGO_MANIFEST_DIR")?);
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let out_dir = PathBuf::from(env::var("OUT_DIR")?);
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println!("cargo:rerun-if-changed=build.rs");
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println!("cargo:rerun-if-changed=cbindgen.toml");
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generate_opcodes(&manifest_dir, &out_dir)?;
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let ffi_out_dir = env::var("FFI_OUTPUT_DIR")
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.map(PathBuf::from)
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.unwrap_or_else(|_| out_dir.clone());
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cbindgen::generate(manifest_dir).map_or_else(
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|error| match error {
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cbindgen::Error::ParseSyntaxError { .. } => {}
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e => panic!("{e:?}"),
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},
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|bindings| {
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bindings.write_to_file(ffi_out_dir.join("CraneliftFFI.h"));
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},
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);
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Ok(())
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}
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