Libm reorganization

compiler-builtins/src/math.rs

@@ -2,7 +2,7 @@
 #[allow(dead_code)]
 #[allow(unused_imports)]
 #[allow(clippy::all)]
-#[path = "../../libm/libm/src/math/mod.rs"]
+#[path = "../../libm/src/math/mod.rs"]
 pub(crate) mod libm;
 
 macro_rules! libm_intrinsics {

etc/libm/Cargo.toml

@@ -0,0 +1,37 @@
+[workspace]
+resolver = "2"
+members = [
+  "libm",
+  "crates/libm-macros",
+  "crates/libm-test",
+  "crates/musl-math-sys",
+  "crates/util",
+]
+default-members = [
+  "libm",
+  "crates/libm-macros",
+  "crates/libm-test"
+]
+exclude = [
+  # Requires `panic = abort` so can't be a member of the workspace
+  "crates/compiler-builtins-smoke-test",
+]
+
+# The default release profile is unchanged.
+
+# Release mode with debug assertions
+[profile.release-checked]
+inherits = "release"
+debug-assertions = true
+overflow-checks = true
+
+# Release with maximum optimizations, which is very slow to build. This is also
+# what is needed to check `no-panic`.
+[profile.release-opt]
+inherits = "release"
+codegen-units = 1
+lto = "fat"
+
+[profile.bench]
+# Required for iai-callgrind
+debug = true

libm/Cargo.toml

@@ -1,37 +1,49 @@
-[workspace]
-resolver = "2"
-members = [
-  "libm",
-  "crates/libm-macros",
-  "crates/libm-test",
-  "crates/musl-math-sys",
-  "crates/util",
-]
-default-members = [
-  "libm",
-  "crates/libm-macros",
-  "crates/libm-test"
-]
-exclude = [
-  # Requires `panic = abort` so can't be a member of the workspace
-  "crates/compiler-builtins-smoke-test",
-]
-
-# The default release profile is unchanged.
-
-# Release mode with debug assertions
-[profile.release-checked]
-inherits = "release"
-debug-assertions = true
-overflow-checks = true
-
-# Release with maximum optimizations, which is very slow to build. This is also
-# what is needed to check `no-panic`.
-[profile.release-opt]
-inherits = "release"
-codegen-units = 1
-lto = "fat"
-
-[profile.bench]
-# Required for iai-callgrind
-debug = true
+[package]
+authors = ["Jorge Aparicio <[email protected]>"]
+categories = ["no-std"]
+description = "libm in pure Rust"
+documentation = "https://docs.rs/libm"
+keywords = ["libm", "math"]
+license = "MIT"
+name = "libm"
+readme = "README.md"
+repository = "https://github.com/rust-lang/libm"
+version = "0.2.11"
+edition = "2021"
+rust-version = "1.63"
+
+[features]
+default = ["arch"]
+
+# Enable architecture-specific features such as SIMD or assembly routines.
+arch = []
+
+# This tells the compiler to assume that a Nightly toolchain is being used and
+# that it should activate any useful Nightly things accordingly.
+unstable = ["unstable-intrinsics", "unstable-float"]
+
+# Enable calls to functions in `core::intrinsics`
+unstable-intrinsics = []
+
+# Make some internal things public for testing.
+unstable-public-internals = []
+
+# Enable the nightly-only `f16` and `f128`.
+unstable-float = []
+
+# Used to prevent using any intrinsics or arch-specific code.
+#
+# HACK: this is a negative feature which is generally a bad idea in Cargo, but
+# we need it to be able to forbid other features when this crate is used in
+# Rust dependencies. Setting this overrides all features that may enable
+# hard float operations.
+force-soft-floats = []
+
+[dev-dependencies]
+no-panic = "0.1.35"
+
+[lints.rust]
+unexpected_cfgs = { level = "warn", check-cfg = [
+  # compiler-builtins sets this feature, but we use it in `libm`
+  'cfg(feature, values("compiler-builtins"))',
+] }