libm - crates.io Package Compare versions

+258

LICENSE.txt

		rust-lang/libm as a whole is available for use under the MIT license:

		------------------------------------------------------------------------------
		Permission is hereby granted, free of charge, to any person obtaining a copy
		of this software and associated documentation files (the "Software"), to deal
		in the Software without restriction, including without limitation the rights
		to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
		copies of the Software, and to permit persons to whom the Software is
		furnished to do so, subject to the following conditions:

		The above copyright notice and this permission notice shall be included in all
		copies or substantial portions of the Software.

		THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
		IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
		FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
		AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
		LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
		OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
		SOFTWARE.
		------------------------------------------------------------------------------

		As a contributor, you agree that your code can be used under either the MIT
		license or the Apache-2.0 license:

		------------------------------------------------------------------------------
		Apache License
		Version 2.0, January 2004
		http://www.apache.org/licenses/

		TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

		1. Definitions.

		"License" shall mean the terms and conditions for use, reproduction,
		and distribution as defined by Sections 1 through 9 of this document.

		"Licensor" shall mean the copyright owner or entity authorized by
		the copyright owner that is granting the License.

		"Legal Entity" shall mean the union of the acting entity and all
		other entities that control, are controlled by, or are under common
		control with that entity. For the purposes of this definition,
		"control" means (i) the power, direct or indirect, to cause the
		direction or management of such entity, whether by contract or
		otherwise, or (ii) ownership of fifty percent (50%) or more of the
		outstanding shares, or (iii) beneficial ownership of such entity.

		"You" (or "Your") shall mean an individual or Legal Entity
		exercising permissions granted by this License.

		"Source" form shall mean the preferred form for making modifications,
		including but not limited to software source code, documentation
		source, and configuration files.

		"Object" form shall mean any form resulting from mechanical
		transformation or translation of a Source form, including but
		not limited to compiled object code, generated documentation,
		and conversions to other media types.

		"Work" shall mean the work of authorship, whether in Source or
		Object form, made available under the License, as indicated by a
		copyright notice that is included in or attached to the work
		(an example is provided in the Appendix below).

		"Derivative Works" shall mean any work, whether in Source or Object
		form, that is based on (or derived from) the Work and for which the
		editorial revisions, annotations, elaborations, or other modifications
		represent, as a whole, an original work of authorship. For the purposes
		of this License, Derivative Works shall not include works that remain
		separable from, or merely link (or bind by name) to the interfaces of,
		the Work and Derivative Works thereof.

		"Contribution" shall mean any work of authorship, including
		the original version of the Work and any modifications or additions
		to that Work or Derivative Works thereof, that is intentionally
		submitted to Licensor for inclusion in the Work by the copyright owner
		or by an individual or Legal Entity authorized to submit on behalf of
		the copyright owner. For the purposes of this definition, "submitted"
		means any form of electronic, verbal, or written communication sent
		to the Licensor or its representatives, including but not limited to
		communication on electronic mailing lists, source code control systems,
		and issue tracking systems that are managed by, or on behalf of, the
		Licensor for the purpose of discussing and improving the Work, but
		excluding communication that is conspicuously marked or otherwise
		designated in writing by the copyright owner as "Not a Contribution."

		"Contributor" shall mean Licensor and any individual or Legal Entity
		on behalf of whom a Contribution has been received by Licensor and
		subsequently incorporated within the Work.

		2. Grant of Copyright License. Subject to the terms and conditions of
		this License, each Contributor hereby grants to You a perpetual,
		worldwide, non-exclusive, no-charge, royalty-free, irrevocable
		copyright license to reproduce, prepare Derivative Works of,
		publicly display, publicly perform, sublicense, and distribute the
		Work and such Derivative Works in Source or Object form.

		3. Grant of Patent License. Subject to the terms and conditions of
		this License, each Contributor hereby grants to You a perpetual,
		worldwide, non-exclusive, no-charge, royalty-free, irrevocable
		(except as stated in this section) patent license to make, have made,
		use, offer to sell, sell, import, and otherwise transfer the Work,
		where such license applies only to those patent claims licensable
		by such Contributor that are necessarily infringed by their
		Contribution(s) alone or by combination of their Contribution(s)
		with the Work to which such Contribution(s) was submitted. If You
		institute patent litigation against any entity (including a
		cross-claim or counterclaim in a lawsuit) alleging that the Work
		or a Contribution incorporated within the Work constitutes direct
		or contributory patent infringement, then any patent licenses
		granted to You under this License for that Work shall terminate
		as of the date such litigation is filed.

		4. Redistribution. You may reproduce and distribute copies of the
		Work or Derivative Works thereof in any medium, with or without
		modifications, and in Source or Object form, provided that You
		meet the following conditions:

		(a) You must give any other recipients of the Work or
		Derivative Works a copy of this License; and

		(b) You must cause any modified files to carry prominent notices
		stating that You changed the files; and

		(c) You must retain, in the Source form of any Derivative Works
		that You distribute, all copyright, patent, trademark, and
		attribution notices from the Source form of the Work,
		excluding those notices that do not pertain to any part of
		the Derivative Works; and

		(d) If the Work includes a "NOTICE" text file as part of its
		distribution, then any Derivative Works that You distribute must
		include a readable copy of the attribution notices contained
		within such NOTICE file, excluding those notices that do not
		pertain to any part of the Derivative Works, in at least one
		of the following places: within a NOTICE text file distributed
		as part of the Derivative Works; within the Source form or
		documentation, if provided along with the Derivative Works; or,
		within a display generated by the Derivative Works, if and
		wherever such third-party notices normally appear. The contents
		of the NOTICE file are for informational purposes only and
		do not modify the License. You may add Your own attribution
		notices within Derivative Works that You distribute, alongside
		or as an addendum to the NOTICE text from the Work, provided
		that such additional attribution notices cannot be construed
		as modifying the License.

		You may add Your own copyright statement to Your modifications and
		may provide additional or different license terms and conditions
		for use, reproduction, or distribution of Your modifications, or
		for any such Derivative Works as a whole, provided Your use,
		reproduction, and distribution of the Work otherwise complies with
		the conditions stated in this License.

		5. Submission of Contributions. Unless You explicitly state otherwise,
		any Contribution intentionally submitted for inclusion in the Work
		by You to the Licensor shall be under the terms and conditions of
		this License, without any additional terms or conditions.
		Notwithstanding the above, nothing herein shall supersede or modify
		the terms of any separate license agreement you may have executed
		with Licensor regarding such Contributions.

		6. Trademarks. This License does not grant permission to use the trade
		names, trademarks, service marks, or product names of the Licensor,
		except as required for reasonable and customary use in describing the
		origin of the Work and reproducing the content of the NOTICE file.

		7. Disclaimer of Warranty. Unless required by applicable law or
		agreed to in writing, Licensor provides the Work (and each
		Contributor provides its Contributions) on an "AS IS" BASIS,
		WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
		implied, including, without limitation, any warranties or conditions
		of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
		PARTICULAR PURPOSE. You are solely responsible for determining the
		appropriateness of using or redistributing the Work and assume any
		risks associated with Your exercise of permissions under this License.

		8. Limitation of Liability. In no event and under no legal theory,
		whether in tort (including negligence), contract, or otherwise,
		unless required by applicable law (such as deliberate and grossly
		negligent acts) or agreed to in writing, shall any Contributor be
		liable to You for damages, including any direct, indirect, special,
		incidental, or consequential damages of any character arising as a
		result of this License or out of the use or inability to use the
		Work (including but not limited to damages for loss of goodwill,
		work stoppage, computer failure or malfunction, or any and all
		other commercial damages or losses), even if such Contributor
		has been advised of the possibility of such damages.

		9. Accepting Warranty or Additional Liability. While redistributing
		the Work or Derivative Works thereof, You may choose to offer,
		and charge a fee for, acceptance of support, warranty, indemnity,
		or other liability obligations and/or rights consistent with this
		License. However, in accepting such obligations, You may act only
		on Your own behalf and on Your sole responsibility, not on behalf
		of any other Contributor, and only if You agree to indemnify,
		defend, and hold each Contributor harmless for any liability
		incurred by, or claims asserted against, such Contributor by reason
		of your accepting any such warranty or additional liability.

		END OF TERMS AND CONDITIONS

		APPENDIX: How to apply the Apache License to your work.

		To apply the Apache License to your work, attach the following
		boilerplate notice, with the fields enclosed by brackets "[]"
		replaced with your own identifying information. (Don't include
		the brackets!) The text should be enclosed in the appropriate
		comment syntax for the file format. We also recommend that a
		file or class name and description of purpose be included on the
		same "printed page" as the copyright notice for easier
		identification within third-party archives.

		Licensed under the Apache License, Version 2.0 (the "License");
		you may not use this file except in compliance with the License.
		You may obtain a copy of the License at

		http://www.apache.org/licenses/LICENSE-2.0

		Unless required by applicable law or agreed to in writing, software
		distributed under the License is distributed on an "AS IS" BASIS,
		WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		See the License for the specific language governing permissions and
		limitations under the License.
		------------------------------------------------------------------------------

		This Rust library contains the following copyrights:

		Copyright (c) 2018 Jorge Aparicio

		Portions of this software are derived from third-party works licensed under
		terms compatible with the above MIT license:

		* musl libc https://www.musl-libc.org/. This library contains the following
		copyright:

		Copyright © 2005-2020 Rich Felker, et al.

		* The CORE-MATH project https://core-math.gitlabpages.inria.fr/. CORE-MATH
		routines are available under the MIT license on a per-file basis.

		The musl libc COPYRIGHT file also includes the following notice relevant to
		math portions of the library:

		------------------------------------------------------------------------------
		Much of the math library code (src/math/* and src/complex/*) is
		Copyright © 1993,2004 Sun Microsystems or
		Copyright © 2003-2011 David Schultz or
		Copyright © 2003-2009 Steven G. Kargl or
		Copyright © 2003-2009 Bruce D. Evans or
		Copyright © 2008 Stephen L. Moshier or
		Copyright © 2017-2018 Arm Limited
		and labelled as such in comments in the individual source files. All
		have been licensed under extremely permissive terms.
		------------------------------------------------------------------------------

		Copyright notices are retained in src/* files where relevant.

+1

-1

.cargo_vcs_info.json

		{
		"git": {
		"sha1": "721a5edc1be6b0412e4b1704590aed76f9a55899"
		"sha1": "114f90ff8a7708586e58dd7c0ed7d2c3f7a91ab1"
		},
		"path_in_vcs": ""
		}

+4

-450

build.rs

		@@ -5,6 +5,8 @@ use std::env;
		println!("cargo:rerun-if-changed=build.rs");
		println!("cargo::rustc-check-cfg=cfg(assert_no_panic)");
		println!("cargo::rustc-check-cfg=cfg(feature, values(\"unstable\"))");

		#[cfg(feature = "musl-reference-tests")]
		musl_reference_tests::generate();
		println!("cargo::rustc-check-cfg=cfg(feature, values(\"checked\"))");

		#[allow(unexpected_cfgs)]
		if !cfg!(feature = "checked") {
		@@ -17,449 +19,1 @@ let lvl = env::var("OPT_LEVEL").unwrap();
		}

		#[cfg(feature = "musl-reference-tests")]
		mod musl_reference_tests {
		use rand::seq::SliceRandom;
		use rand::Rng;
		use std::env;
		use std::fs;
		use std::process::Command;

		// Number of tests to generate for each function
		const NTESTS: usize = 500;

		// These files are all internal functions or otherwise miscellaneous, not
		// defining a function we want to test.
		const IGNORED_FILES: &[&str] = &[
		"fenv.rs",
		// These are giving slightly different results compared to musl
		"lgamma.rs",
		"lgammaf.rs",
		"tgamma.rs",
		"j0.rs",
		"j0f.rs",
		"jn.rs",
		"jnf.rs",
		"j1.rs",
		"j1f.rs",
		];

		struct Function {
		name: String,
		args: Vec<Ty>,
		ret: Vec<Ty>,
		tests: Vec<Test>,
		}

		enum Ty {
		F32,
		F64,
		I32,
		Bool,
		}

		struct Test {
		inputs: Vec<i64>,
		outputs: Vec<i64>,
		}

		pub fn generate() {
		// PowerPC tests are failing on LLVM 13: https://github.com/rust-lang/rust/issues/88520
		let target_arch = env::var("CARGO_CFG_TARGET_ARCH").unwrap();
		if target_arch == "powerpc64" {
		return;
		}

		let files = fs::read_dir("src/math")
		.unwrap()
		.map(\|f\| f.unwrap().path())
		.collect::<Vec<_>>();

		let mut math = Vec::new();
		for file in files {
		if IGNORED_FILES.iter().any(\|f\| file.ends_with(f)) {
		continue;
		}

		println!("generating musl reference tests in {:?}", file);

		let contents = fs::read_to_string(file).unwrap();
		let mut functions = contents.lines().filter(\|f\| f.starts_with("pub fn"));
		while let Some(function_to_test) = functions.next() {
		math.push(parse(function_to_test));
		}
		}

		// Generate a bunch of random inputs for each function. This will
		// attempt to generate a good set of uniform test cases for exercising
		// all the various functionality.
		generate_random_tests(&mut math, &mut rand::thread_rng());

		// After we have all our inputs, use the x86_64-unknown-linux-musl
		// target to generate the expected output.
		generate_test_outputs(&mut math);
		//panic!("Boo");
		// ... and now that we have both inputs and expected outputs, do a bunch
		// of codegen to create the unit tests which we'll actually execute.
		generate_unit_tests(&math);
		}

		/// A "poor man's" parser for the signature of a function
		fn parse(s: &str) -> Function {
		let s = eat(s, "pub fn ");
		let pos = s.find('(').unwrap();
		let name = &s[..pos];
		let s = &s[pos + 1..];
		let end = s.find(')').unwrap();
		let args = s[..end]
		.split(',')
		.map(\|arg\| {
		let colon = arg.find(':').unwrap();
		parse_ty(arg[colon + 1..].trim())
		})
		.collect::<Vec<_>>();
		let tail = &s[end + 1..];
		let tail = eat(tail, " -> ");
		let ret = parse_retty(tail.replace("{", "").trim());

		return Function {
		name: name.to_string(),
		args,
		ret,
		tests: Vec::new(),
		};

		fn parse_ty(s: &str) -> Ty {
		match s {
		"f32" => Ty::F32,
		"f64" => Ty::F64,
		"i32" => Ty::I32,
		"bool" => Ty::Bool,
		other => panic!("unknown type `{}`", other),
		}
		}

		fn parse_retty(s: &str) -> Vec<Ty> {
		match s {
		"(f32, f32)" => vec![Ty::F32, Ty::F32],
		"(f32, i32)" => vec![Ty::F32, Ty::I32],
		"(f64, f64)" => vec![Ty::F64, Ty::F64],
		"(f64, i32)" => vec![Ty::F64, Ty::I32],
		other => vec![parse_ty(other)],
		}
		}

		fn eat<'a>(s: &'a str, prefix: &str) -> &'a str {
		if s.starts_with(prefix) {
		&s[prefix.len()..]
		} else {
		panic!("{:?} didn't start with {:?}", s, prefix)
		}
		}
		}

		fn generate_random_tests<R: Rng>(functions: &mut [Function], rng: &mut R) {
		for function in functions {
		for _ in 0..NTESTS {
		function.tests.push(generate_test(function, rng));
		}
		}

		fn generate_test<R: Rng>(function: &Function, rng: &mut R) -> Test {
		let mut inputs = function
		.args
		.iter()
		.map(\|ty\| ty.gen_i64(rng))
		.collect::<Vec<_>>();

		// First argument to this function appears to be a number of
		// iterations, so passing in massive random numbers causes it to
		// take forever to execute, so make sure we're not running random
		// math code until the heat death of the universe.
		if function.name == "jn" \|\| function.name == "jnf" {
		inputs[0] &= 0xffff;
		}

		Test {
		inputs,
		// zero output for now since we'll generate it later
		outputs: vec![],
		}
		}
		}

		impl Ty {
		fn gen_i64<R: Rng>(&self, r: &mut R) -> i64 {
		use std::f32;
		use std::f64;

		return match self {
		Ty::F32 => {
		if r.gen_range(0, 20) < 1 {
		let i = *[f32::NAN, f32::INFINITY, f32::NEG_INFINITY]
		.choose(r)
		.unwrap();
		i.to_bits().into()
		} else {
		r.gen::<f32>().to_bits().into()
		}
		}
		Ty::F64 => {
		if r.gen_range(0, 20) < 1 {
		let i = *[f64::NAN, f64::INFINITY, f64::NEG_INFINITY]
		.choose(r)
		.unwrap();
		i.to_bits() as i64
		} else {
		r.gen::<f64>().to_bits() as i64
		}
		}
		Ty::I32 => {
		if r.gen_range(0, 10) < 1 {
		let i = *[i32::max_value(), 0, i32::min_value()].choose(r).unwrap();
		i.into()
		} else {
		r.gen::<i32>().into()
		}
		}
		Ty::Bool => r.gen::<bool>() as i64,
		};
		}

		fn libc_ty(&self) -> &'static str {
		match self {
		Ty::F32 => "f32",
		Ty::F64 => "f64",
		Ty::I32 => "i32",
		Ty::Bool => "i32",
		}
		}

		fn libc_pty(&self) -> &'static str {
		match self {
		Ty::F32 => "*mut f32",
		Ty::F64 => "*mut f64",
		Ty::I32 => "*mut i32",
		Ty::Bool => "*mut i32",
		}
		}

		fn default(&self) -> &'static str {
		match self {
		Ty::F32 => "0_f32",
		Ty::F64 => "0_f64",
		Ty::I32 => "0_i32",
		Ty::Bool => "false",
		}
		}

		fn to_i64(&self) -> &'static str {
		match self {
		Ty::F32 => ".to_bits() as i64",
		Ty::F64 => ".to_bits() as i64",
		Ty::I32 => " as i64",
		Ty::Bool => " as i64",
		}
		}
		}

		fn generate_test_outputs(functions: &mut [Function]) {
		let mut src = String::new();
		let dst = std::env::var("OUT_DIR").unwrap();

		// Generate a program which will run all tests with all inputs in
		// `functions`. This program will write all outputs to stdout (in a
		// binary format).
		src.push_str("use std::io::Write;");
		src.push_str("fn main() {");
		src.push_str("let mut result = Vec::new();");
		for function in functions.iter_mut() {
		src.push_str("unsafe {");
		src.push_str("extern { fn ");
		src.push_str(&function.name);
		src.push_str("(");

		let (ret, retptr) = match function.name.as_str() {
		"sincos" \| "sincosf" => (None, &function.ret[..]),
		_ => (Some(&function.ret[0]), &function.ret[1..]),
		};
		for (i, arg) in function.args.iter().enumerate() {
		src.push_str(&format!("arg{}: {},", i, arg.libc_ty()));
		}
		for (i, ret) in retptr.iter().enumerate() {
		src.push_str(&format!("argret{}: {},", i, ret.libc_pty()));
		}
		src.push_str(")");
		if let Some(ty) = ret {
		src.push_str(" -> ");
		src.push_str(ty.libc_ty());
		}
		src.push_str("; }");

		src.push_str(&format!("static TESTS: &[[i64; {}]]", function.args.len()));
		src.push_str(" = &[");
		for test in function.tests.iter() {
		src.push_str("[");
		for val in test.inputs.iter() {
		src.push_str(&val.to_string());
		src.push_str(",");
		}
		src.push_str("],");
		}
		src.push_str("];");

		src.push_str("for test in TESTS {");
		for (i, arg) in retptr.iter().enumerate() {
		src.push_str(&format!("let mut argret{} = {};", i, arg.default()));
		}
		src.push_str("let output = ");
		src.push_str(&function.name);
		src.push_str("(");
		for (i, arg) in function.args.iter().enumerate() {
		src.push_str(&match arg {
		Ty::F32 => format!("f32::from_bits(test[{}] as u32)", i),
		Ty::F64 => format!("f64::from_bits(test[{}] as u64)", i),
		Ty::I32 => format!("test[{}] as i32", i),
		Ty::Bool => format!("test[{}] as i32", i),
		});
		src.push_str(",");
		}
		for (i, _) in retptr.iter().enumerate() {
		src.push_str(&format!("&mut argret{},", i));
		}
		src.push_str(");");
		if let Some(ty) = &ret {
		src.push_str(&format!("let output = output{};", ty.to_i64()));
		src.push_str("result.extend_from_slice(&output.to_le_bytes());");
		}

		for (i, ret) in retptr.iter().enumerate() {
		src.push_str(&format!(
		"result.extend_from_slice(&(argret{}{}).to_le_bytes());",
		i,
		ret.to_i64(),
		));
		}
		src.push_str("}");

		src.push_str("}");
		}

		src.push_str("std::io::stdout().write_all(&result).unwrap();");

		src.push_str("}");

		let path = format!("{}/gen.rs", dst);
		fs::write(&path, src).unwrap();

		// Make it somewhat pretty if something goes wrong
		drop(Command::new("rustfmt").arg(&path).status());

		// Compile and execute this tests for the musl target, assuming we're an
		// x86_64 host effectively.
		let status = Command::new("rustc")
		.current_dir(&dst)
		.arg(&path)
		.arg("--target=x86_64-unknown-linux-musl")
		.status()
		.unwrap();
		assert!(status.success());
		let output = Command::new("./gen").current_dir(&dst).output().unwrap();
		assert!(output.status.success());
		assert!(output.stderr.is_empty());

		// Map all the output bytes back to an `i64` and then shove it all into
		// the expected results.
		let mut results = output.stdout.chunks_exact(8).map(\|buf\| {
		let mut exact = [0; 8];
		exact.copy_from_slice(buf);
		i64::from_le_bytes(exact)
		});

		for f in functions.iter_mut() {
		for test in f.tests.iter_mut() {
		test.outputs = (0..f.ret.len()).map(\|_\| results.next().unwrap()).collect();
		}
		}
		assert!(results.next().is_none());
		}

		/// Codegens a file which has a ton of `#[test]` annotations for all the
		/// tests that we generated above.
		fn generate_unit_tests(functions: &[Function]) {
		let mut src = String::new();
		let dst = std::env::var("OUT_DIR").unwrap();

		for function in functions {
		src.push_str("#[test]");
		src.push_str("fn ");
		src.push_str(&function.name);
		src.push_str("_matches_musl() {");
		src.push_str(&format!(
		"static TESTS: &[([i64; {}], [i64; {}])]",
		function.args.len(),
		function.ret.len(),
		));
		src.push_str(" = &[");
		for test in function.tests.iter() {
		src.push_str("([");
		for val in test.inputs.iter() {
		src.push_str(&val.to_string());
		src.push_str(",");
		}
		src.push_str("],");
		src.push_str("[");
		for val in test.outputs.iter() {
		src.push_str(&val.to_string());
		src.push_str(",");
		}
		src.push_str("],");
		src.push_str("),");
		}
		src.push_str("];");

		src.push_str("for (test, expected) in TESTS {");
		src.push_str("let output = ");
		src.push_str(&function.name);
		src.push_str("(");
		for (i, arg) in function.args.iter().enumerate() {
		src.push_str(&match arg {
		Ty::F32 => format!("f32::from_bits(test[{}] as u32)", i),
		Ty::F64 => format!("f64::from_bits(test[{}] as u64)", i),
		Ty::I32 => format!("test[{}] as i32", i),
		Ty::Bool => format!("test[{}] as i32", i),
		});
		src.push_str(",");
		}
		src.push_str(");");

		for (i, ret) in function.ret.iter().enumerate() {
		let get = if function.ret.len() == 1 {
		String::new()
		} else {
		format!(".{}", i)
		};
		src.push_str(&(match ret {
		Ty::F32 => format!("if _eqf(output{}, f32::from_bits(expected[{}] as u32)).is_ok() {{ continue }}", get, i),
		Ty::F64 => format!("if _eq(output{}, f64::from_bits(expected[{}] as u64)).is_ok() {{ continue }}", get, i),
		Ty::I32 => format!("if output{} as i64 == expected[{}] {{ continue }}", get, i),
		Ty::Bool => unreachable!(),
		}));
		}

		src.push_str(
		r#"
		panic!("INPUT: {:?} EXPECTED: {:?} ACTUAL {:?}", test, expected, output);
		"#,
		);
		src.push_str("}");

		src.push_str("}");
		}

		let path = format!("{}/musl-tests.rs", dst);
		fs::write(&path, src).unwrap();

		// Try to make it somewhat pretty
		drop(Command::new("rustfmt").arg(&path).status());
		}
		}

+15

-9

Cargo.toml

		@@ -13,6 +13,7 @@ # THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
		[package]
		edition = "2018"
		edition = "2021"
		name = "libm"
		version = "0.2.8"
		version = "0.2.9"
		authors = ["Jorge Aparicio <jorge@japaric.io>"]
		build = "build.rs"
		exclude = [
		@@ -22,2 +23,7 @@ "/ci/",
		]
		autolib = false
		autobins = false
		autoexamples = false
		autotests = false
		autobenches = false
		description = "libm in pure Rust"
		@@ -31,3 +37,3 @@ documentation = "https://docs.rs/libm"
		categories = ["no-std"]
		license = "MIT OR Apache-2.0"
		license = "MIT AND (MIT OR Apache-2.0)"
		repository = "https://github.com/rust-lang/libm"
		@@ -38,12 +44,12 @@

		[lib]
		name = "libm"
		path = "src/lib.rs"

		[dev-dependencies.no-panic]
		version = "0.1.8"
		version = "0.1.30"

		[build-dependencies.rand]
		version = "0.6.5"
		optional = true

		[features]
		default = []
		musl-reference-tests = ["rand"]
		force-soft-floats = []
		unstable = []

+36

-3

CHANGELOG.md

		@@ -1,13 +0,42 @@
		# Change Log
		# Changelog

		All notable changes to this project will be documented in this file.
		This project adheres to [Semantic Versioning](http://semver.org/).

		The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
		and this project adheres to
		[Semantic Versioning](https://semver.org/spec/v2.0.0.html).

		## [Unreleased]

		...
		## [0.2.9](https://github.com/rust-lang/libm/compare/libm-v0.2.8...libm-v0.2.9) - 2024-10-26

		### Fixed

		- Update exponent calculations in nextafter to match musl

		### Changed

		- Update licensing to MIT AND (MIT OR Apache-2.0), as this is derivative from
		MIT-licensed musl.
		- Set edition to 2021 for all crates
		- Upgrade all dependencies

		### Other

		- Don't deny warnings in lib.rs
		- Rename the `musl-bitwise-tests` feature to `test-musl-serialized`
		- Rename the `musl-reference-tests` feature to `musl-bitwise-tests`
		- Move `musl-reference-tests` to a new `libm-test` crate
		- Add a `force-soft-floats` feature to prevent using any intrinsics or
		arch-specific code
		- Deny warnings in CI
		- Fix `clippy::deprecated_cfg_attr` on compiler_builtins
		- Corrected English typos
		- Remove unneeded `extern core` in `tgamma`
		- Allow internal_features lint when building with "unstable"

		## [v0.2.1] - 2019-11-22

		### Fixed

		- sincosf
		@@ -18,2 +47,3 @@
		### Added

		- Benchmarks
		@@ -27,2 +57,3 @@ - signum
		### Fixed

		- Rounding to negative zero
		@@ -34,2 +65,3 @@ - Overflows in rem_pio2 and remquo
		### Removed

		- F32Ext and F64Ext traits
		@@ -40,2 +72,3 @@
		### Fixed

		- Restored compatibility with Rust 1.31.0
		@@ -42,0 +75,0 @@

+4

-4

CONTRIBUTING.md

		@@ -10,3 +10,3 @@ # How to contribute
		- Run `cargo test` to make sure it works
		- Run `cargo test --features musl-reference-tests` to compare your
		- Run `cargo test --features libm-test/test-musl-serialized` to compare your
		implementation against musl's
		@@ -84,3 +84,3 @@ - Send us a pull request! Make sure to run `cargo fmt` on your code before

		```
		```sh
		cargo test
		@@ -92,7 +92,7 @@ ```

		```sh
		cargo test --features libm-test/test-musl-serialized
		```
		cargo test --features musl-reference-tests
		```

		Note that you may need to pass `--release` to Cargo if there are errors related
		to integer overflow.

+10

-9

README.md

		@@ -39,14 +39,15 @@ # `libm`

		Licensed under either of
		Usage is licensed under the MIT license ([LICENSE-MIT](LICENSE-MIT) or
		http://opensource.org/licenses/MIT).

		- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or
		http://www.apache.org/licenses/LICENSE-2.0)
		- MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)

		at your option.

		### Contribution

		Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the
		work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any
		additional terms or conditions.
		Contributions are licensed under both the MIT license and the Apache License,
		Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or
		http://www.apache.org/licenses/LICENSE-2.0). Unless you explicitly state
		otherwise, any contribution intentionally submitted for inclusion in the work
		by you, as defined in the Apache-2.0 license, shall be dual licensed as
		mentioned, without any additional terms or conditions.

		See `LICENSE.txt` for full details.

+9

-14

src/lib.rs

		//! libm in pure Rust
		#![deny(warnings)]
		#![no_std]
		#![cfg_attr(all(feature = "unstable"), feature(core_intrinsics))]
		#![allow(clippy::unreadable_literal)]
		#![cfg_attr(feature = "unstable", allow(internal_features))]
		#![cfg_attr(feature = "unstable", feature(core_intrinsics))]
		#![allow(clippy::assign_op_pattern)]
		#![allow(clippy::deprecated_cfg_attr)]
		#![allow(clippy::eq_op)]
		#![allow(clippy::float_cmp)]
		#![allow(clippy::int_plus_one)]
		#![allow(clippy::many_single_char_names)]
		#![allow(clippy::mixed_case_hex_literals)]
		#![allow(clippy::needless_return)]
		#![allow(clippy::int_plus_one)]
		#![allow(clippy::deprecated_cfg_attr)]
		#![allow(clippy::mixed_case_hex_literals)]
		#![allow(clippy::float_cmp)]
		#![allow(clippy::eq_op)]
		#![allow(clippy::assign_op_pattern)]
		#![allow(clippy::unreadable_literal)]

		@@ -55,6 +55,1 @@ mod libm_helper;
		}

		// PowerPC tests are failing on LLVM 13: https://github.com/rust-lang/rust/issues/88520
		#[cfg(not(target_arch = "powerpc64"))]
		#[cfg(all(test, feature = "musl-reference-tests"))]
		include!(concat!(env!("OUT_DIR"), "/musl-tests.rs"));

+1

-1

src/math/ceil.rs

		@@ -23,3 +23,3 @@ #![allow(unreachable_code)]
		//main implementation fails with the x87 FPU used by
		//debian i386, probablly due to excess precision issues.
		//debian i386, probably due to excess precision issues.
		//basic implementation taken from https://github.com/rust-lang/libm/issues/219
		@@ -26,0 +26,0 @@ use super::fabs;

+1

-1

src/math/exp2.rs

		@@ -31,3 +31,3 @@ // origin: FreeBSD /usr/src/lib/msun/src/s_exp2.c */

		#[cfg_attr(rustfmt, rustfmt_skip)]
		#[rustfmt::skip]
		static TBL: [u64; TBLSIZE * 2] = [
		@@ -34,0 +34,0 @@ // exp2(z + eps) eps

+1

-1

src/math/floor.rs

		@@ -23,3 +23,3 @@ #![allow(unreachable_code)]
		//main implementation fails with the x87 FPU used by
		//debian i386, probablly due to excess precision issues.
		//debian i386, probably due to excess precision issues.
		//basic implementation taken from https://github.com/rust-lang/libm/issues/219
		@@ -26,0 +26,0 @@ use super::fabs;

+1

-1

src/math/mod.rs

		@@ -79,3 +79,3 @@ macro_rules! force_eval {
		(#[cfg($($clause:tt)*)] $e:expr) => {
		#[cfg(all(feature = "unstable", $($clause)*))]
		#[cfg(all(feature = "unstable", not(feature = "force-soft-floats"), $($clause)*))]
		{
		@@ -82,0 +82,0 @@ if true { // thwart the dead code lint

+1

-1

src/math/nextafter.rs

		@@ -26,3 +26,3 @@ #[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)]

		let e = ux_i.wrapping_shr(52 & 0x7ff);
		let e = ux_i >> 52 & 0x7ff;
		// raise overflow if ux.f is infinite and x is finite
		@@ -29,0 +29,0 @@ if e == 0x7ff {

+1

-1

src/math/nextafterf.rs

		@@ -26,3 +26,3 @@ #[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)]

		let e = ux_i.wrapping_shr(0x7f80_0000_u32);
		let e = ux_i & 0x7f80_0000_u32;
		// raise overflow if ux_f is infinite and x is finite
		@@ -29,0 +29,0 @@ if e == 0x7f80_0000_u32 {

+1

-1

src/math/pow.rs

		@@ -19,3 +19,3 @@ /* origin: FreeBSD /usr/src/lib/msun/src/e_pow.c */
		// where w1 has 53-24 = 29 bit trailing zeros.
		// 2. Perform y*log2(x) = n+y' by simulating muti-precision
		// 2. Perform y*log2(x) = n+y' by simulating multi-precision
		// arithmetic, where \|y'\|<=0.5.
		@@ -22,0 +22,0 @@ // 3. Return xy = 2nexp(y'log2)

+3

-3

src/math/sqrt.rs

		@@ -95,7 +95,7 @@ /* origin: FreeBSD /usr/src/lib/msun/src/e_sqrt.c */
		}
		#[cfg(target_feature = "sse2")]
		#[cfg(all(target_feature = "sse2", not(feature = "force-soft-floats")))]
		{
		// Note: This path is unlikely since LLVM will usually have already
		// optimized sqrt calls into hardware instructions if sse2 is available,
		// but if someone does end up here they'll apprected the speed increase.
		// but if someone does end up here they'll appreciate the speed increase.
		#[cfg(target_arch = "x86")]
		@@ -111,3 +111,3 @@ use core::arch::x86::*;
		}
		#[cfg(not(target_feature = "sse2"))]
		#[cfg(any(not(target_feature = "sse2"), feature = "force-soft-floats"))]
		{
		@@ -114,0 +114,0 @@ use core::num::Wrapping;

+3

-3

src/math/sqrtf.rs

		@@ -30,7 +30,7 @@ /* origin: FreeBSD /usr/src/lib/msun/src/e_sqrtf.c */
		}
		#[cfg(target_feature = "sse")]
		#[cfg(all(target_feature = "sse", not(feature = "force-soft-floats")))]
		{
		// Note: This path is unlikely since LLVM will usually have already
		// optimized sqrt calls into hardware instructions if sse is available,
		// but if someone does end up here they'll apprected the speed increase.
		// but if someone does end up here they'll appreciate the speed increase.
		#[cfg(target_arch = "x86")]
		@@ -46,3 +46,3 @@ use core::arch::x86::*;
		}
		#[cfg(not(target_feature = "sse"))]
		#[cfg(any(not(target_feature = "sse"), feature = "force-soft-floats"))]
		{
		@@ -49,0 +49,0 @@ const TINY: f32 = 1.0e-30;

+0

-1

src/math/tgamma.rs

		@@ -25,3 +25,2 @@ /*
		*/
		extern crate core;
		use super::{exp, floor, k_cos, k_sin, pow};
		@@ -28,0 +27,0 @@

LICENSE-APACHE

Sorry, the diff of this file is not supported yet

LICENSE-MIT

Sorry, the diff of this file is not supported yet

Cargo.toml.orig

Sorry, the diff of this file is not supported yet

libm - cargo Package Compare versions