Rollup merge of rust-lang#128349 - tgross35:x86-f16, r=Noratrieb

Enable `f16` on x86 and x86-64 Since the `compiler_builtins` update [1], ABI bugs on x86 should be resolved. Enable tests for f16 on these platforms now. [1]: rust-lang#125016 try-job: i686-gnu try-job: dist-i586-gnu-i586-i686-musl
tgross35 · Aug 22, 2024 · b986d9b · b986d9b
2 parents c6d3a99 + 0a5d5ff
commit b986d9b
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Showing 2 changed files with 13 additions and 16 deletions.
diff --git a/library/core/src/num/f16.rs b/library/core/src/num/f16.rs
@@ -261,7 +261,7 @@ impl f16 {
  ///
  /// ```
  /// #![feature(f16)]
- /// # #[cfg(target_arch = "aarch64")] { // FIXME(f16_F128): rust-lang/rust#123885
+ /// # #[cfg(all(target_arch = "x86_64", target_os = "linux"))] {
  ///
  /// let nan = f16::NAN;
  /// let f = 7.0_f16;
@@ -293,7 +293,7 @@ impl f16 {
  ///
  /// ```
  /// #![feature(f16)]
- /// # #[cfg(target_arch = "aarch64")] { // FIXME(f16_F128): rust-lang/rust#123885
+ /// # #[cfg(all(target_arch = "x86_64", target_os = "linux"))] {
  ///
  /// let f = 7.0f16;
  /// let inf = f16::INFINITY;
@@ -319,7 +319,7 @@ impl f16 {
  ///
  /// ```
  /// #![feature(f16)]
- /// # #[cfg(target_arch = "aarch64")] { // FIXME(f16_F128): rust-lang/rust#123885
+ /// # #[cfg(all(target_arch = "x86_64", target_os = "linux"))] {
  ///
  /// let f = 7.0f16;
  /// let inf: f16 = f16::INFINITY;
@@ -347,7 +347,7 @@ impl f16 {
  ///
  /// ```
  /// #![feature(f16)]
- /// # #[cfg(target_arch = "aarch64")] { // FIXME(f16_F128): rust-lang/rust#123885
+ /// # #[cfg(all(target_arch = "x86_64", target_os = "linux"))] {
  ///
  /// let min = f16::MIN_POSITIVE; // 6.1035e-5
  /// let max = f16::MAX;
@@ -377,7 +377,7 @@ impl f16 {
  ///
  /// ```
  /// #![feature(f16)]
- /// # #[cfg(target_arch = "aarch64")] { // FIXME(f16_F128): rust-lang/rust#123885
+ /// # #[cfg(all(target_arch = "x86_64", target_os = "linux"))] {
  ///
  /// let min = f16::MIN_POSITIVE; // 6.1035e-5
  /// let max = f16::MAX;
@@ -409,7 +409,7 @@ impl f16 {
  ///
  /// ```
  /// #![feature(f16)]
- /// # #[cfg(target_arch = "aarch64")] { // FIXME(f16_F128): rust-lang/rust#123885
+ /// # #[cfg(all(target_arch = "x86_64", target_os = "linux"))] {
  ///
  /// use std::num::FpCategory;
  ///
@@ -867,7 +867,7 @@ impl f16 {
  ///
  /// ```
  /// #![feature(f16)]
- /// # #[cfg(target_arch = "aarch64")] { // FIXME(f16_F128): rust-lang/rust#123885
+ /// # #[cfg(all(target_arch = "x86_64", target_os = "linux"))] {
  ///
  /// let value = 4.6_f16;
  /// let rounded = unsafe { value.to_int_unchecked::<u16>() };
@@ -910,7 +910,7 @@ impl f16 {
  ///
  /// ```
  /// #![feature(f16)]
- /// # #[cfg(target_arch = "aarch64")] { // FIXME(f16_F128): rust-lang/rust#123885
+ /// # #[cfg(all(target_arch = "x86_64", target_os = "linux"))] {
  ///
  /// # // FIXME(f16_f128): enable this once const casting works
  /// # // assert_ne!((1f16).to_bits(), 1f16 as u128); // to_bits() is not casting!
@@ -958,7 +958,7 @@ impl f16 {
  ///
  /// ```
  /// #![feature(f16)]
- /// # #[cfg(target_arch = "aarch64")] { // FIXME(f16_F128): rust-lang/rust#123885
+ /// # #[cfg(all(target_arch = "x86_64", target_os = "linux"))] {
  ///
  /// let v = f16::from_bits(0x4a40);
  /// assert_eq!(v, 12.5);
@@ -1071,7 +1071,7 @@ impl f16 {
  ///
  /// ```
  /// #![feature(f16)]
- /// # #[cfg(target_arch = "aarch64")] { // FIXME(f16_F128): rust-lang/rust#123885
+ /// # #[cfg(all(target_arch = "x86_64", target_os = "linux"))] {
  ///
  /// let value = f16::from_be_bytes([0x4a, 0x40]);
  /// assert_eq!(value, 12.5);
@@ -1094,7 +1094,7 @@ impl f16 {
  ///
  /// ```
  /// #![feature(f16)]
- /// # #[cfg(target_arch = "aarch64")] { // FIXME(f16_F128): rust-lang/rust#123885
+ /// # #[cfg(all(target_arch = "x86_64", target_os = "linux"))] {
  ///
  /// let value = f16::from_le_bytes([0x40, 0x4a]);
  /// assert_eq!(value, 12.5);
@@ -1124,7 +1124,7 @@ impl f16 {
  ///
  /// ```
  /// #![feature(f16)]
- /// # #[cfg(target_arch = "aarch64")] { // FIXME(f16_F128): rust-lang/rust#123885
+ /// # #[cfg(all(target_arch = "x86_64", target_os = "linux"))] {
  ///
  /// let value = f16::from_ne_bytes(if cfg!(target_endian = "big") {
  /// [0x4a, 0x40]
@@ -1257,7 +1257,7 @@ impl f16 {
  ///
  /// ```
  /// #![feature(f16)]
- /// # #[cfg(target_arch = "aarch64")] { // FIXME(f16_F128): rust-lang/rust#123885
+ /// # #[cfg(all(target_arch = "x86_64", target_os = "linux"))] {
  ///
  /// assert!((-3.0f16).clamp(-2.0, 1.0) == -2.0);
  /// assert!((0.0f16).clamp(-2.0, 1.0) == 0.0);

diff --git a/library/std/build.rs b/library/std/build.rs
@@ -103,9 +103,6 @@ fn main() {
  ("arm64ec", _) => false,
  // MinGW ABI bugs <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115054>
  ("x86_64", "windows") => false,
- // x86 has ABI bugs that show up with optimizations. This should be partially fixed with
- // the compiler-builtins update. <https://github.com/rust-lang/rust/issues/123885>
- ("x86" | "x86_64", _) => false,
  // Missing `__gnu_h2f_ieee` and `__gnu_f2h_ieee`
  ("powerpc" | "powerpc64", _) => false,
  // Missing `__gnu_h2f_ieee` and `__gnu_f2h_ieee`