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Generate instruction tables into build directory, and only when changed

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This commit is contained in:
Amaan Cheval 2018-02-15 10:28:16 +05:30 committed by Fabian
parent ae5ec9b91a
commit 948fa047d0
3 changed files with 58 additions and 8 deletions
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20
gen/generate_interpreter.js
View file

@ -2,9 +2,12 @@
"use strict";
const fs = require("fs");
const path = require("path");
const encodings = require("./x86_table");
const c_ast = require("./c_ast");
const { hex } = require("./util");
const { hex, write_sync_if_changed } = require("./util");
const OUT_DIR = path.join(__dirname, "..", "build");
gen_table();
@ -390,7 +393,10 @@ function gen_table()
body: ["assert(false);"]
},
};
fs.writeFileSync("/tmp/table", c_ast.print_syntax_tree([table]).join("\n") + "\n");
write_sync_if_changed(
path.join(OUT_DIR, "interpreter"),
c_ast.print_syntax_tree([table]).join("\n") + "\n"
);
const cases0f_16 = [];
const cases0f_32 = [];
@ -449,6 +455,12 @@ function gen_table()
body: ["assert(false);"]
},
};
fs.writeFileSync("/tmp/table0f_16", c_ast.print_syntax_tree([table0f_16]).join("\n") + "\n");
fs.writeFileSync("/tmp/table0f_32", c_ast.print_syntax_tree([table0f_32]).join("\n") + "\n");
write_sync_if_changed(
path.join(OUT_DIR, "interpreter0f_16"),
c_ast.print_syntax_tree([table0f_16]).join("\n") + "\n"
);
write_sync_if_changed(
path.join(OUT_DIR, "interpreter0f_32"),
c_ast.print_syntax_tree([table0f_32]).join("\n") + "\n"
);
}

20
gen/generate_jit.js
View file

@ -2,9 +2,12 @@
"use strict";
const fs = require("fs");
const path = require("path");
const encodings = require("./x86_table");
const c_ast = require("./c_ast");
const { hex } = require("./util");
const { hex, write_sync_if_changed } = require("./util");
const OUT_DIR = path.join(__dirname, "..", "build");
const APPEND_NONFAULTING_FLAG = "instr_flags |= JIT_INSTR_NONFAULTING_FLAG;";
@ -490,7 +493,10 @@ function gen_table()
body: ["assert(false);"]
},
};
fs.writeFileSync("/tmp/jit", c_ast.print_syntax_tree([table]).join("\n") + "\n");
write_sync_if_changed(
path.join(OUT_DIR, "jit"),
c_ast.print_syntax_tree([table]).join("\n") + "\n"
);
const cases0f_16 = [];
const cases0f_32 = [];
@ -549,6 +555,12 @@ function gen_table()
body: ["assert(false);"]
},
};
fs.writeFileSync("/tmp/jit0f_16", c_ast.print_syntax_tree([table0f_16]).join("\n") + "\n");
fs.writeFileSync("/tmp/jit0f_32", c_ast.print_syntax_tree([table0f_32]).join("\n") + "\n");
write_sync_if_changed(
path.join(OUT_DIR, "jit0f_16"),
c_ast.print_syntax_tree([table0f_16]).join("\n") + "\n"
);
write_sync_if_changed(
path.join(OUT_DIR, "jit0f_32"),
c_ast.print_syntax_tree([table0f_32]).join("\n") + "\n"
);
}

26
gen/util.js
View file

@ -1,5 +1,7 @@
"use strict";
const assert = require("assert");
const fs = require("fs");
function hex(n, pad)
{
@ -9,6 +11,30 @@ function hex(n, pad)
return s;
}
function write_sync_if_changed(filename, contents)
{
assert.ok(typeof contents === "string", "Contents must be a string for comparison");
let existing_contents = null;
try
{
existing_contents = fs.readFileSync(filename).toString();
}
catch(e)
{
if(e.code !== "ENOENT") throw e;
}
const contents_changed = existing_contents !== contents;
if(contents_changed)
{
fs.writeFileSync(filename, contents);
console.log("[+] Writing", filename);
}
return contents_changed;
}
module.exports = {
hex,
write_sync_if_changed
};