Add portable_simd support (#45)

* Add portable_simd support

* Implement rand features for portable_simd

* Fix rand implementation

* features: add dependency from portable_simd to std

* inline(always) more operations

* chore(portable_simd): update to the latest nightly

---------

Co-authored-by: Sébastien Crozet <[email protected]>

.github/workflows/simba-ci-build.yml

@@ -13,21 +13,21 @@ jobs:
   check-fmt:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - name: Check formatting
-      run: cargo fmt -- --check
+      - uses: actions/checkout@v2
+      - name: Check formatting
+        run: cargo fmt -- --check
   build-native:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - name: Build --no-default-feature
-      run: cargo build --no-default-features;
-    - name: Build libm only
-      run: cargo build --no-default-features --features libm;
-    - name: Build (default features)
-      run: cargo build;
-    - name: Build all features except cuda,libm
-      run: cargo build --features wide,rkyv-serialize,serde_serialize,partial_fixed_point_support;
+      - uses: actions/checkout@v2
+      - name: Build --no-default-feature
+        run: cargo build --no-default-features;
+      - name: Build libm only
+        run: cargo build --no-default-features --features libm;
+      - name: Build (default features)
+        run: cargo build;
+      - name: Build all features except libm
+        run: cargo build --features wide,rkyv-serialize,serde_serialize,partial_fixed_point_support;
   build-wasm:
     runs-on: ubuntu-latest
     steps:
@@ -49,19 +49,4 @@ jobs:
       - name: build x86_64-unknown-linux-gnu
         run: xargo build --verbose --no-default-features --target=x86_64-unknown-linux-gnu;
       - name: build x86_64-unknown-linux-gnu --features libm
-        run: xargo build --verbose --no-default-features --features libm --target=x86_64-unknown-linux-gnu;
-  build-cuda:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: Jimver/[email protected]
-      - name: Install nightly-2021-12-04
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: nightly-2021-12-04
-          override: true
-      - uses: actions/checkout@v2
-      - run: rustup target add nvptx64-nvidia-cuda
-      - run: cargo build --no-default-features --features cuda
-      - run: cargo build --no-default-features --features cuda --target=nvptx64-nvidia-cuda
-        env:
-          CUDA_ARCH: "350"
+        run: xargo build --verbose --no-default-features --features libm --target=x86_64-unknown-linux-gnu;

Cargo.toml

@@ -17,6 +17,7 @@ maintenance = { status = "actively-developed" }
 [features]
 default = [ "std" ]
 std = ["wide/std"]
+portable_simd = [ "std" ]
 partial_fixed_point_support = [ "fixed", "cordic" ]
 serde_serialize = [ "serde", "fixed/serde" ]
 rkyv-serialize = [ "rkyv" ]

src/lib.rs

@@ -32,6 +32,7 @@ However, the SIMD traits won't be implemented for any SIMD types. Therefore it i
 #![deny(unused_results)]
 #![deny(missing_docs)] // FIXME: should be denied
 #![cfg_attr(not(feature = "std"), no_std)]
+#![cfg_attr(feature = "portable_simd", feature(portable_simd))]
 
 #[cfg(not(feature = "std"))]
 extern crate core as std;

src/simd/mod.rs

@@ -3,6 +3,8 @@
 pub use self::auto_simd_impl::*;
 #[cfg(feature = "packed_simd")]
 pub use self::packed_simd_impl::*;
+#[cfg(feature = "portable_simd")]
+pub use self::portable_simd_impl::*;
 pub use self::simd_bool::SimdBool;
 pub use self::simd_complex::SimdComplexField;
 pub use self::simd_option::SimdOption;
@@ -18,6 +20,8 @@ pub use self::wide_simd_impl::{
 mod auto_simd_impl;
 #[cfg(feature = "packed_simd")]
 mod packed_simd_impl;
+#[cfg(feature = "portable_simd")]
+mod portable_simd_impl;
 #[cfg(feature = "rand")]
 mod rand_impl;
 mod simd_bool;