| 1 | //! Architecture-specific routines and operations. |
| 2 | //! |
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| 3 | //! LLVM will already optimize calls to some of these in cases that there are hardware |
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| 4 | //! instructions. Providing an implementation here just ensures that the faster implementation |
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| 5 | //! is used when calling the function directly. This helps anyone who uses `libm` directly, as |
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| 6 | //! well as improving things when these routines are called as part of other implementations. |
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| 7 | |
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| 8 | // Most implementations should be defined here, to ensure they are not made available when |
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| 9 | // soft floats are required. |
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| 10 | #[cfg (arch_enabled)] |
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| 11 | cfg_if! { |
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| 12 | if #[cfg(all(target_arch = "wasm32" , intrinsics_enabled))] { |
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| 13 | mod wasm32; |
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| 14 | pub use wasm32::{ |
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| 15 | ceil, ceilf, fabs, fabsf, floor, floorf, rint, rintf, sqrt, sqrtf, trunc, truncf, |
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| 16 | }; |
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| 17 | } else if #[cfg(target_feature = "sse2" )] { |
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| 18 | mod i686; |
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| 19 | pub use i686::{sqrt, sqrtf}; |
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| 20 | } else if #[cfg(all( |
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| 21 | target_arch = "aarch64" , // TODO: also arm64ec? |
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| 22 | target_feature = "neon" , |
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| 23 | target_endian = "little" , // see https://github.com/rust-lang/stdarch/issues/1484 |
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| 24 | ))] { |
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| 25 | mod aarch64; |
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| 26 | pub use aarch64::{rint, rintf}; |
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| 27 | } |
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| 28 | } |
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| 29 | |
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| 30 | // There are certain architecture-specific implementations that are needed for correctness |
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| 31 | // even with `force-soft-float`. These are configured here. |
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| 32 | cfg_if! { |
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| 33 | if #[cfg(all(target_arch = "x86" , not(target_feature = "sse2" )))] { |
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| 34 | mod i586; |
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| 35 | pub use i586::{ceil, floor}; |
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| 36 | } |
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| 37 | } |
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| 38 | |
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