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Issues: rust-lang/rust

Draft release notes for 1.87
#140133 opened Apr 21, 2025 by BoxyUwU
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Issues list

mul_add on *-pc-windows-gnu returns incorrect results A-floating-point Area: Floating point numbers and arithmetic C-bug Category: This is a bug. I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness O-windows-gnu Toolchain: GNU, Operating system: Windows P-medium Medium priority T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#140515 opened Apr 30, 2025 by beetrees
20
Some platforms cannot provide strict IEEE-754 conformant subnormals due to real-time guarantees and/or hardware limitations A-floating-point Area: Floating point numbers and arithmetic C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-opsem Relevant to the opsem team
#139277 opened Apr 2, 2025 by DemiMarie
28
f16 and f128 have non-trivial ABI requirements on some targets A-ABI Area: Concerning the application binary interface (ABI) A-floating-point Area: Floating point numbers and arithmetic C-bug Category: This is a bug. E-needs-investigation Call for partcipation: This issues needs some investigation to determine current status F-f16_and_f128 `#![feature(f16)]`, `#![feature(f128)]` T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#138616 opened Mar 17, 2025 by RalfJung
1
core::num::bignum could use u64 limbs A-floating-point Area: Floating point numbers and arithmetic C-enhancement Category: An issue proposing an enhancement or a PR with one. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#137887 opened Mar 2, 2025 by CatsAreFluffy
x86 softfloat target: no way to get LLVM to make local use of the FPU or SIMD registers A-floating-point Area: Floating point numbers and arithmetic A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. A-SIMD Area: SIMD (Single Instruction Multiple Data) C-bug Category: This is a bug. C-external-bug Category: issue that is caused by bugs in software beyond our control T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#136540 opened Feb 4, 2025 by RalfJung
7
Tracking Issue for algebraic floating point methods A-floating-point Area: Floating point numbers and arithmetic C-tracking-issue Category: An issue tracking the progress of sth. like the implementation of an RFC T-lang Relevant to the language team, which will review and decide on the PR/issue. T-libs-api Relevant to the library API team, which will review and decide on the PR/issue.
#136469 opened Feb 3, 2025 by calder
2 of 6 tasks
20
Change rint to roundeven in round_ties_even implementation A-floating-point Area: Floating point numbers and arithmetic A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#136459 opened Feb 3, 2025 by tgross35
15
f64::atan2 documentation error A-docs Area: Documentation for any part of the project, including the compiler, standard library, and tools A-floating-point Area: Floating point numbers and arithmetic C-bug Category: This is a bug. E-easy Call for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#136275 opened Jan 30, 2025 by gantha-shiva
1
@whirlwindaster
4
NaNs are quieted on Emscripten A-ABI Area: Concerning the application binary interface (ABI) A-floating-point Area: Floating point numbers and arithmetic A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. I-miscompile Issue: Correct Rust code lowers to incorrect machine code O-emscripten Target: 50% off wasm32-unknown-musl. the savings come out of stdio.h, but hey, you get SDL! T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#136197 opened Jan 28, 2025 by purplesyringa
2
Some -Ctarget-features must be restrained on RISCV A-ABI Area: Concerning the application binary interface (ABI) A-floating-point Area: Floating point numbers and arithmetic C-bug Category: This is a bug. E-needs-investigation Call for partcipation: This issues needs some investigation to determine current status O-riscv Target: RISC-V architecture T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#132618 opened Nov 4, 2024 by workingjubilee
20
Figure out which target features are required/incompatible for which ABI A-ABI Area: Concerning the application binary interface (ABI) A-floating-point Area: Floating point numbers and arithmetic A-target-feature Area: Enabling/disabling target features like AVX, Neon, etc. C-tracking-issue Category: An issue tracking the progress of sth. like the implementation of an RFC T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#131799 opened Oct 16, 2024 by RalfJung
5 of 15 tasks
20
absent precision parameter for floating point format string is undocumented A-docs Area: Documentation for any part of the project, including the compiler, standard library, and tools A-floating-point Area: Floating point numbers and arithmetic A-fmt Area: `core::fmt` C-bug Category: This is a bug. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#131159 opened Oct 2, 2024 by e00E
1
1
Decimal formatting for some floating point numbers does not round-to-even A-floating-point Area: Floating point numbers and arithmetic A-fmt Area: `core::fmt` C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#130936 opened Sep 27, 2024 by gregates
8
PowerPC altivec intrinsics are unsound due to subnormal flushing A-floating-point Area: Floating point numbers and arithmetic C-bug Category: This is a bug. I-miscompile Issue: Correct Rust code lowers to incorrect machine code I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness O-PowerPC Target: PowerPC processors P-medium Medium priority T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#129886 opened Sep 2, 2024 by beetrees
3
32-bit ARM NEON intrinsics are unsound due to subnormal flushing A-floating-point Area: Floating point numbers and arithmetic C-bug Category: This is a bug. I-miscompile Issue: Correct Rust code lowers to incorrect machine code I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness O-Arm Target: 32-bit Arm processors (armv6, armv7, thumb...), including 64-bit Arm in AArch32 state P-medium Medium priority T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#129880 opened Sep 2, 2024 by RalfJung
2
Scalar vector operations can use NEON instructions, which have incorrect subnormal behavior A-floating-point Area: Floating point numbers and arithmetic A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#129853 opened Sep 1, 2024 by RalfJung
There's no documented way to losslessly print a float (so it will be parsed as the exact same value) A-docs Area: Documentation for any part of the project, including the compiler, standard library, and tools A-floating-point Area: Floating point numbers and arithmetic E-needs-investigation Call for partcipation: This issues needs some investigation to determine current status T-libs-api Relevant to the library API team, which will review and decide on the PR/issue.
#128972 opened Aug 11, 2024 by maia-s
1
Stop optimizing under the assumption of default denormal behavior A-floating-point Area: Floating point numbers and arithmetic C-discussion Category: Discussion or questions that doesn't represent real issues. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#123123 opened Mar 27, 2024 by DemiMarie
13
f32/f64 examples should not use EPSILON as an absolute tolerance value A-docs Area: Documentation for any part of the project, including the compiler, standard library, and tools A-floating-point Area: Floating point numbers and arithmetic C-enhancement Category: An issue proposing an enhancement or a PR with one. T-libs Relevant to the library team, which will review and decide on the PR/issue. T-libs-api Relevant to the library API team, which will review and decide on the PR/issue.
#116916 opened Oct 19, 2023 by SludgePhD
3
Compiler emits inappropriate SSE2 instructions for f64 math A-codegen Area: Code generation A-floating-point Area: Floating point numbers and arithmetic A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. I-slow Issue: Problems and improvements with respect to performance of generated code. O-x86_64 Target: x86-64 processors (like x86_64-*) (also known as amd64 and x64) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#116359 opened Oct 2, 2023 by HEnquist
4
The ABI of float types can be changed by -Ctarget-feature A-ABI Area: Concerning the application binary interface (ABI) A-floating-point Area: Floating point numbers and arithmetic A-target-feature Area: Enabling/disabling target features like AVX, Neon, etc. I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness P-high High priority T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-opsem Relevant to the opsem team
#116344 opened Oct 2, 2023 by RalfJung
42
Tracking issue: 32bit x86 targets lose float NaN payload in return values A-ABI Area: Concerning the application binary interface (ABI) A-floating-point Area: Floating point numbers and arithmetic C-tracking-issue Category: An issue tracking the progress of sth. like the implementation of an RFC O-x86_32 Target: x86 processors, 32 bit (like i686-*) (IA-32)
#115567 opened Sep 5, 2023 by RalfJung
10
Tracking Issue for RISC-V Ratified Extensions Intrinsics A-floating-point Area: Floating point numbers and arithmetic A-SIMD Area: SIMD (Single Instruction Multiple Data) A-target-feature Area: Enabling/disabling target features like AVX, Neon, etc. C-tracking-issue Category: An issue tracking the progress of sth. like the implementation of an RFC O-riscv Target: RISC-V architecture T-libs-api Relevant to the library API team, which will review and decide on the PR/issue.
#114544 opened Aug 6, 2023 by coastalwhite
2 of 11 tasks
3
Tracking issue: 32bit x86 targets without SSE2 have unsound floating point behavior A-floating-point Area: Floating point numbers and arithmetic C-tracking-issue Category: An issue tracking the progress of sth. like the implementation of an RFC I-miscompile Issue: Correct Rust code lowers to incorrect machine code I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness O-x86_32 Target: x86 processors, 32 bit (like i686-*) (IA-32) P-medium Medium priority
#114479 opened Aug 4, 2023 by RalfJung
41
Floating point modulo producing incorrect compuations A-floating-point Area: Floating point numbers and arithmetic C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#111405 opened May 9, 2023 by Gip-Gip
6
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