Trevor Gross 6ceeb0849e Implement the internal feature cfg_target_has_reliable_f16_f128 ... Support for `f16` and `f128` is varied across targets, backends, and backend versions. Eventually we would like to reach a point where all backends support these approximately equally, but until then we have to work around some of these nuances of support being observable. Introduce the `cfg_target_has_reliable_f16_f128` internal feature, which provides the following new configuration gates: * `cfg(target_has_reliable_f16)` * `cfg(target_has_reliable_f16_math)` * `cfg(target_has_reliable_f128)` * `cfg(target_has_reliable_f128_math)` `reliable_f16` and `reliable_f128` indicate that basic arithmetic for the type works correctly. The `_math` versions indicate that anything relying on `libm` works correctly, since sometimes this hits a separate class of codegen bugs. These options match configuration set by the build script at [1]. The logic for LLVM support is duplicated as-is from the same script. There are a few possible updates that will come as a follow up. The config introduced here is not planned to ever become stable, it is only intended to replace the build scripts for `std` tests and `compiler-builtins` that don't have any way to configure based on the codegen backend. MCP: https://github.com/rust-lang/compiler-team/issues/866 Closes: https://github.com/rust-lang/compiler-team/issues/866 [1]: 555e1d0386/library/std/build.rs (L84-L186)		2025-04-27 19:58:44 +00:00
..
classify-runtime-const.rs	move f16/f128 const fn under f16/f128 feature gate	2024-10-05 10:13:18 +02:00
conv-bits-runtime-const.rs	move f16/f128 const fn under f16/f128 feature gate	2024-10-05 10:13:18 +02:00
int-to-float-miscompile-issue-105626.rs	move a test to a better location	2024-09-12 08:08:38 +02:00
target-has-reliable-nightly-float.rs	Implement the internal feature cfg_target_has_reliable_f16_f128	2025-04-27 19:58:44 +00:00