switch core::simd to repr(simd) and deprecate it.

This functionality will be available out of tree in the `simd` crate on
crates.io.

[breaking-change]

src/libcore/lib.rs

@@ -78,7 +78,8 @@
 #![feature(optin_builtin_traits)]
 #![feature(reflect)]
 #![feature(rustc_attrs)]
-#![feature(simd)]
+#![cfg_attr(stage0, feature(simd))]
+#![cfg_attr(not(stage0), feature(simd_basics))]
 #![feature(staged_api)]
 #![feature(unboxed_closures)]
 
@@ -150,7 +151,13 @@ pub mod iter;
 pub mod option;
 pub mod raw;
 pub mod result;
+
+#[cfg(stage0)]
+#[path = "simd_old.rs"]
 pub mod simd;
+#[cfg(not(stage0))]
+pub mod simd;
+
 pub mod slice;
 pub mod str;
 pub mod hash;

src/libcore/simd.rs

@@ -37,11 +37,14 @@
 #![unstable(feature = "core_simd",
             reason = "needs an RFC to flesh out the design",
             issue = "27731")]
+#![deprecated(since = "1.3.0",
+              reason = "use the external `simd` crate instead")]
 
 #![allow(non_camel_case_types)]
 #![allow(missing_docs)]
+#![allow(deprecated)]
 
-#[simd]
+#[repr(simd)]
 #[derive(Copy, Clone, Debug)]
 #[repr(C)]
 pub struct i8x16(pub i8, pub i8, pub i8, pub i8,
@@ -49,23 +52,23 @@ pub struct i8x16(pub i8, pub i8, pub i8, pub i8,
                  pub i8, pub i8, pub i8, pub i8,
                  pub i8, pub i8, pub i8, pub i8);
 
-#[simd]
+#[repr(simd)]
 #[derive(Copy, Clone, Debug)]
 #[repr(C)]
 pub struct i16x8(pub i16, pub i16, pub i16, pub i16,
                  pub i16, pub i16, pub i16, pub i16);
 
-#[simd]
+#[repr(simd)]
 #[derive(Copy, Clone, Debug)]
 #[repr(C)]
 pub struct i32x4(pub i32, pub i32, pub i32, pub i32);
 
-#[simd]
+#[repr(simd)]
 #[derive(Copy, Clone, Debug)]
 #[repr(C)]
 pub struct i64x2(pub i64, pub i64);
 
-#[simd]
+#[repr(simd)]
 #[derive(Copy, Clone, Debug)]
 #[repr(C)]
 pub struct u8x16(pub u8, pub u8, pub u8, pub u8,
@@ -73,28 +76,28 @@ pub struct u8x16(pub u8, pub u8, pub u8, pub u8,
                  pub u8, pub u8, pub u8, pub u8,
                  pub u8, pub u8, pub u8, pub u8);
 
-#[simd]
+#[repr(simd)]
 #[derive(Copy, Clone, Debug)]
 #[repr(C)]
 pub struct u16x8(pub u16, pub u16, pub u16, pub u16,
                  pub u16, pub u16, pub u16, pub u16);
 
-#[simd]
+#[repr(simd)]
 #[derive(Copy, Clone, Debug)]
 #[repr(C)]
 pub struct u32x4(pub u32, pub u32, pub u32, pub u32);
 
-#[simd]
+#[repr(simd)]
 #[derive(Copy, Clone, Debug)]
 #[repr(C)]
 pub struct u64x2(pub u64, pub u64);
 
-#[simd]
+#[repr(simd)]
 #[derive(Copy, Clone, Debug)]
 #[repr(C)]
 pub struct f32x4(pub f32, pub f32, pub f32, pub f32);
 
-#[simd]
+#[repr(simd)]
 #[derive(Copy, Clone, Debug)]
 #[repr(C)]
 pub struct f64x2(pub f64, pub f64);

src/libcore/simd_old.rs

@@ -0,0 +1,98 @@
+// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// 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.
+
+//! SIMD vectors.
+//!
+//! These types can be used for accessing basic SIMD operations. Each of them
+//! implements the standard arithmetic operator traits (Add, Sub, Mul, Div,
+//! Rem, Shl, Shr) through compiler magic, rather than explicitly. Currently
+//! comparison operators are not implemented. To use SSE3+, you must enable
+//! the features, like `-C target-feature=sse3,sse4.1,sse4.2`, or a more
+//! specific `target-cpu`. No other SIMD intrinsics or high-level wrappers are
+//! provided beyond this module.
+//!
+//! ```rust
+//! # #![feature(core_simd)]
+//! fn main() {
+//!     use std::simd::f32x4;
+//!     let a = f32x4(40.0, 41.0, 42.0, 43.0);
+//!     let b = f32x4(1.0, 1.1, 3.4, 9.8);
+//!     println!("{:?}", a + b);
+//! }
+//! ```
+//!
+//! # Stability Note
+//!
+//! These are all experimental. The interface may change entirely, without
+//! warning.
+
+#![unstable(feature = "core_simd",
+            reason = "needs an RFC to flesh out the design")]
+
+#![allow(non_camel_case_types)]
+#![allow(missing_docs)]
+
+#[simd]
+#[derive(Copy, Clone, Debug)]
+#[repr(C)]
+pub struct i8x16(pub i8, pub i8, pub i8, pub i8,
+                 pub i8, pub i8, pub i8, pub i8,
+                 pub i8, pub i8, pub i8, pub i8,
+                 pub i8, pub i8, pub i8, pub i8);
+
+#[simd]
+#[derive(Copy, Clone, Debug)]
+#[repr(C)]
+pub struct i16x8(pub i16, pub i16, pub i16, pub i16,
+                 pub i16, pub i16, pub i16, pub i16);
+
+#[simd]
+#[derive(Copy, Clone, Debug)]
+#[repr(C)]
+pub struct i32x4(pub i32, pub i32, pub i32, pub i32);
+
+#[simd]
+#[derive(Copy, Clone, Debug)]
+#[repr(C)]
+pub struct i64x2(pub i64, pub i64);
+
+#[simd]
+#[derive(Copy, Clone, Debug)]
+#[repr(C)]
+pub struct u8x16(pub u8, pub u8, pub u8, pub u8,
+                 pub u8, pub u8, pub u8, pub u8,
+                 pub u8, pub u8, pub u8, pub u8,
+                 pub u8, pub u8, pub u8, pub u8);
+
+#[simd]
+#[derive(Copy, Clone, Debug)]
+#[repr(C)]
+pub struct u16x8(pub u16, pub u16, pub u16, pub u16,
+                 pub u16, pub u16, pub u16, pub u16);
+
+#[simd]
+#[derive(Copy, Clone, Debug)]
+#[repr(C)]
+pub struct u32x4(pub u32, pub u32, pub u32, pub u32);
+
+#[simd]
+#[derive(Copy, Clone, Debug)]
+#[repr(C)]
+pub struct u64x2(pub u64, pub u64);
+
+#[simd]
+#[derive(Copy, Clone, Debug)]
+#[repr(C)]
+pub struct f32x4(pub f32, pub f32, pub f32, pub f32);
+
+#[simd]
+#[derive(Copy, Clone, Debug)]
+#[repr(C)]
+pub struct f64x2(pub f64, pub f64);

src/libstd/lib.rs

@@ -294,6 +294,7 @@ pub use core::mem;
 pub use core::ops;
 pub use core::ptr;
 pub use core::raw;
+#[allow(deprecated)]
 pub use core::simd;
 pub use core::result;
 pub use core::option;

src/libstd/rt/unwind/seh64_gnu.rs

@@ -21,7 +21,6 @@ use self::EXCEPTION_DISPOSITION::*;
 use rt::dwarf::eh;
 use core::mem;
 use core::ptr;
-use simd;
 use libc::{c_void, c_ulonglong, DWORD, LPVOID};
 type ULONG_PTR = c_ulonglong;
 

src/libstd/sys/windows/backtrace.rs

@@ -194,6 +194,8 @@ mod arch {
 
 #[cfg(target_arch = "x86_64")]
 mod arch {
+    #![allow(deprecated)]
+
     use libc::{c_longlong, c_ulonglong};
     use libc::types::os::arch::extra::{WORD, DWORD, DWORDLONG};
     use simd;