9eb87c39a0
add notes about non-compliant FP behavior on 32bit x86 targets Based on ton of prior discussion (see all the issues linked from https://github.com/rust-lang/unsafe-code-guidelines/issues/237), the consensus seems to be that these targets are simply cursed and we cannot implement the desired semantics for them. I hope I properly understood what exactly the extent of the curse is here, let's make sure people with more in-depth FP knowledge take a close look! In particular for the tier 3 targets I have no clue which target is affected by which particular variant of the x86_32 FP curse. I assumed that `i686` meant SSE is used so the "floating point return value" is the only problem, while everything lower (`i586`, `i386`) meant x87 is used. I opened https://github.com/rust-lang/rust/issues/114479 to concisely describe and track the issue. Cc `@workingjubilee` `@thomcc` `@chorman0773` `@rust-lang/opsem` Fixes https://github.com/rust-lang/rust/issues/73288 Fixes https://github.com/rust-lang/rust/issues/72327
This directory contains some source code for the Rust project, including:
- The bootstrapping build system
- Various submodules for tools, like cargo, tidy, etc.
For more information on how various parts of the compiler work, see the rustc dev guide.