Reorganize and refactor source tree (rust-lang#324)

With RFC 2325 looking close to being accepted, I took a crack at
reorganizing this repository to being more amenable for inclusion in
libstd/libcore. My current plan is to add stdsimd as a submodule in
rust-lang/rust and then use `#[path]` to include the modules directly
into libstd/libcore.

Before this commit, however, the source code of coresimd/stdsimd
themselves were not quite ready for this. Imports wouldn't compile for
one reason or another, and the organization was also different than the
RFC itself!

In addition to moving a lot of files around, this commit has the
following major changes:

* The `cfg_feature_enabled!` macro is now renamed to
  `is_target_feature_detected!`
* The `vendor` module is now called `arch`.
* Under the `arch` module is a suite of modules like `x86`, `x86_64`,
  etc. One per `cfg!(target_arch)`.
* The `is_target_feature_detected!` macro was removed from coresimd.
  Unfortunately libcore has no ability to export unstable macros, so for
  now all feature detection is canonicalized in stdsimd.

The `coresimd` and `stdsimd` crates have been updated to the planned
organization in RFC 2325 as well. The runtime bits saw the largest
amount of refactoring, seeing a good deal of simplification without the
core/std split.

.travis.yml

@@ -24,7 +24,7 @@ matrix:
     - env: DOCUMENTATION
       install: true
       script: ci/dox.sh
-    - script: cargo test --manifest-path stdsimd-verify/Cargo.toml
+    - script: cargo test --manifest-path crates/stdsimd-verify/Cargo.toml
       install: true
     - env: RUSTFMT=On TARGET=x86_64-unknown-linux-gnu NO_ADD=1
       script: |

Cargo.toml

@@ -1,33 +1,8 @@
-[package]
-name = "stdsimd"
-version = "0.0.3"
-authors = ["Andrew Gallant <[email protected]>"]
-description = "SIMD support in Rust's standard library."
-documentation = "https://docs.rs/stdsimd"
-homepage = "https://github.com/rust-lang-nursery/stdsimd"
-repository = "https://github.com/rust-lang-nursery/stdsimd"
-readme = "README.md"
-keywords = ["std", "simd", "intrinsics"]
-categories = ["hardware-support"]
-license = "MIT/Apache-2.0"
-
 [workspace]
-members = ["stdsimd-verify"]
-
-[badges]
-travis-ci = { repository = "rust-lang-nursery/stdsimd" }
-appveyor = { repository = "rust-lang-nursery/stdsimd"  }
-is-it-maintained-issue-resolution = { repository = "rust-lang-nursery/stdsimd" }
-is-it-maintained-open-issues = { repository = "rust-lang-nursery/stdsimd" }
-maintenance = { status = "experimental" }
-
-[dependencies]
-coresimd = { version = "0.0.3", path = "coresimd/" }
-
-[dev-dependencies]
-auxv = "0.3.3"
-quickcheck = "0.6"
-rand = "0.4"
+members = [
+  "crates/stdsimd-verify",
+  "crates/stdsimd",
+]
 
 [profile.release]
 debug = true
@@ -36,10 +11,3 @@ opt-level = 3
 [profile.bench]
 debug = 1
 opt-level = 3
-
-[features]
-# Internal-usage only: denies all warnings.
-strict = [ "coresimd/strict" ]
-# Internal-usage only: enables only those intrinsics supported by Intel's
-# Software Development Environment (SDE).
-intel_sde = [ "coresimd/intel_sde" ]

ci/dox.sh

@@ -22,16 +22,18 @@ dox() {
   rm -rf target/doc/$arch
   mkdir target/doc/$arch
 
-  cargo build --target $target
+  cargo build --target $target --manifest-path crates/stdsimd/Cargo.toml
 
   rustdoc --target $target \
-          -o target/doc/$arch coresimd/src/lib.rs \
+          -o target/doc/$arch crates/coresimd/src/lib.rs \
           --crate-name coresimd \
           --library-path target/$target/debug/deps
   rustdoc --target $target \
-          -o target/doc/$arch src/lib.rs \
+          -o target/doc/$arch crates/stdsimd/src/lib.rs \
           --crate-name stdsimd \
-          --library-path target/$target/debug/deps
+          --library-path target/$target/debug/deps \
+          --extern cfg_if=`ls target/$target/debug/deps/libcfg_if-*.rlib` \
+          --extern libc=`ls target/$target/debug/deps/liblibc-*.rlib`
 }
 
 dox i686 i686-unknown-linux-gnu

ci/run.sh

@@ -23,7 +23,7 @@ echo "OBJDUMP=${OBJDUMP}"
 
 cargo_test() {
     cmd="cargo test --target=$TARGET --features $FEATURES $1"
-    cmd="$cmd -p coresimd -p stdsimd"
+    cmd="$cmd -p coresimd -p stdsimd --manifest-path crates/stdsimd/Cargo.toml"
     cmd="$cmd -- $2"
     $cmd
 }

coresimd/src/aarch64/neon.rs → coresimd/aarch64/neon.rs

@@ -4,8 +4,8 @@
 
 #[cfg(test)]
 use stdsimd_test::assert_instr;
-use simd_llvm::simd_add;
-use v128::f64x2;
+use coresimd::simd_llvm::simd_add;
+use coresimd::v128::f64x2;
 
 /// Vector add.
 #[inline]
@@ -41,8 +41,8 @@ pub unsafe fn vaddd_u64(a: u64, b: u64) -> u64 {
 
 #[cfg(test)]
 mod tests {
-    use super::f64x2;
-    use aarch64::neon;
+    use simd::f64x2;
+    use coresimd::aarch64::neon;
     use stdsimd_test::simd_test;
 
     #[simd_test = "neon"]

coresimd/src/aarch64/v8.rs → coresimd/aarch64/v8.rs

@@ -57,7 +57,7 @@ pub unsafe fn _cls_u64(x: u64) -> u64 {
 
 #[cfg(test)]
 mod tests {
-    use aarch64::v8;
+    use coresimd::aarch64::v8;
 
     #[test]
     fn _rev_u64() {

coresimd/src/arm/neon.rs → coresimd/arm/neon.rs

@@ -3,10 +3,9 @@
 #[cfg(test)]
 use stdsimd_test::assert_instr;
 
-use simd_llvm::simd_add;
-
-use v64::{f32x2, i16x4, i32x2, i8x8, u16x4, u32x2, u8x8};
-use v128::{f32x4, i16x8, i32x4, i64x2, i8x16, u16x8, u32x4, u64x2, u8x16};
+use coresimd::simd_llvm::simd_add;
+use coresimd::v64::*;
+use coresimd::v128::*;
 
 /// Vector add.
 #[inline]
@@ -216,7 +215,7 @@ pub unsafe fn vrsqrte_f32(a: f32x2) -> f32x2 {
 mod tests {
     use stdsimd_test::simd_test;
     use simd::*;
-    use arm::neon;
+    use coresimd::arm::neon;
 
     #[simd_test = "neon"]
     unsafe fn vadd_s8() {

coresimd/src/arm/v6.rs → coresimd/arm/v6.rs

@@ -25,7 +25,7 @@ pub unsafe fn _rev_u32(x: u32) -> u32 {
 
 #[cfg(test)]
 mod tests {
-    use arm::v6;
+    use coresimd::arm::v6;
 
     #[test]
     fn _rev_u16() {

coresimd/src/arm/v7.rs → coresimd/arm/v7.rs

@@ -50,7 +50,7 @@ extern "C" {
 
 #[cfg(test)]
 mod tests {
-    use arm::v7;
+    use coresimd::arm::v7;
 
     #[test]
     fn _clz_u8() {