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Create a "fake-SIMD" type to work around rust-lang/rust#23037
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Palmer Cox
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Mar 8, 2015
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,141 @@ | ||
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | ||
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | ||
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | ||
| // option. This file may not be copied, modified, or distributed | ||
| // except according to those terms. | ||
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| #[cfg(not(ndebug))] | ||
| pub use self::fake::*; | ||
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| #[cfg(ndebug)] | ||
| pub use self::real::*; | ||
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| pub trait SimdExt { | ||
| fn simd_eq(self, rhs: Self) -> Self; | ||
| } | ||
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| #[cfg(not(ndebug))] | ||
| impl SimdExt for fake::u32x4 { | ||
| fn simd_eq(self, rhs: Self) -> Self { | ||
| if self == rhs { | ||
| fake::u32x4(0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff) | ||
| } else { | ||
| fake::u32x4(0, 0, 0, 0) | ||
| } | ||
| } | ||
| } | ||
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| #[cfg(ndebug)] | ||
| impl SimdExt for real::u32x4 { | ||
| fn simd_eq(self, rhs: Self) -> Self { | ||
| self == rhs | ||
| } | ||
| } | ||
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| #[cfg(not(ndebug))] | ||
| mod fake { | ||
| use std::ops::{Add, BitAnd, BitOr, BitXor, Shl, Shr, Sub}; | ||
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| #[derive(Copy, PartialEq, Eq)] | ||
| #[allow(non_camel_case_types)] | ||
| pub struct u32x4(pub u32, pub u32, pub u32, pub u32); | ||
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| impl Add for u32x4 { | ||
| type Output = u32x4; | ||
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| fn add(self, rhs: u32x4) -> u32x4 { | ||
| u32x4( | ||
| self.0.wrapping_add(rhs.0), | ||
| self.1.wrapping_add(rhs.1), | ||
| self.2.wrapping_add(rhs.2), | ||
| self.3.wrapping_add(rhs.3)) | ||
| } | ||
| } | ||
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| impl Sub for u32x4 { | ||
| type Output = u32x4; | ||
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| fn sub(self, rhs: u32x4) -> u32x4 { | ||
| u32x4( | ||
| self.0.wrapping_sub(rhs.0), | ||
| self.1.wrapping_sub(rhs.1), | ||
| self.2.wrapping_sub(rhs.2), | ||
| self.3.wrapping_sub(rhs.3)) | ||
| } | ||
| } | ||
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| impl BitAnd for u32x4 { | ||
| type Output = u32x4; | ||
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| fn bitand(self, rhs: u32x4) -> u32x4 { | ||
| u32x4(self.0 & rhs.0, self.1 & rhs.1, self.2 & rhs.2, self.3 & rhs.3) | ||
| } | ||
| } | ||
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| impl BitOr for u32x4 { | ||
| type Output = u32x4; | ||
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| fn bitor(self, rhs: u32x4) -> u32x4 { | ||
| u32x4(self.0 | rhs.0, self.1 | rhs.1, self.2 | rhs.2, self.3 | rhs.3) | ||
| } | ||
| } | ||
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| impl BitXor for u32x4 { | ||
| type Output = u32x4; | ||
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| fn bitxor(self, rhs: u32x4) -> u32x4 { | ||
| u32x4(self.0 ^ rhs.0, self.1 ^ rhs.1, self.2 ^ rhs.2, self.3 ^ rhs.3) | ||
| } | ||
| } | ||
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| impl Shl<usize> for u32x4 { | ||
| type Output = u32x4; | ||
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| fn shl(self, amt: usize) -> u32x4 { | ||
| u32x4(self.0 << amt, self.1 << amt, self.2 << amt, self.3 << amt) | ||
| } | ||
| } | ||
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| impl Shl<u32x4> for u32x4 { | ||
| type Output = u32x4; | ||
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| fn shl(self, rhs: u32x4) -> u32x4 { | ||
| u32x4(self.0 << rhs.0, self.1 << rhs.1, self.2 << rhs.2, self.3 << rhs.3) | ||
| } | ||
| } | ||
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| impl Shr<usize> for u32x4 { | ||
| type Output = u32x4; | ||
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| fn shr(self, amt: usize) -> u32x4 { | ||
| u32x4(self.0 >> amt, self.1 >> amt, self.2 >> amt, self.3 >> amt) | ||
| } | ||
| } | ||
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| impl Shr<u32x4> for u32x4 { | ||
| type Output = u32x4; | ||
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| fn shr(self, rhs: u32x4) -> u32x4 { | ||
| u32x4(self.0 >> rhs.0, self.1 >> rhs.1, self.2 >> rhs.2, self.3 >> rhs.3) | ||
| } | ||
| } | ||
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| #[derive(Copy)] | ||
| #[allow(non_camel_case_types)] | ||
| pub struct u64x2(pub u64, pub u64); | ||
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| impl Add for u64x2 { | ||
| type Output = u64x2; | ||
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| fn add(self, rhs: u64x2) -> u64x2 { | ||
| u64x2(self.0.wrapping_add(rhs.0), self.1.wrapping_add(rhs.1)) | ||
| } | ||
| } | ||
| } | ||
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| #[cfg(ndebug)] | ||
| mod real { | ||
| pub use std::simd::u32x4; | ||
| pub use std::simd::u64x2; | ||
| } | ||
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