Implement core::ops (rust-lang#10)

* Add vector-vector arithmetic ops
* Add operators and integer conversions for masks
* Add unary traits
* Implement Index and IndexMut
* Implement by-ref ops for masks
* Document intrinsics
* Implement format traits for masks
* Add floating point ops tests
* Add integer tests
* Add mask tests

Author: calebzulawski

crates/core_simd/src/intrinsics.rs

@@ -0,0 +1,39 @@
+//! This module contains the LLVM intrinsics bindings that provide the functionality for this
+//! crate.
+//!
+//! The LLVM assembly language is documented here: https://llvm.org/docs/LangRef.html
+
+/// These intrinsics aren't linked directly from LLVM and are mostly undocumented, however they are
+/// simply lowered to the matching LLVM instructions by the compiler.  The associated instruction
+/// is documented alongside each intrinsic.
+extern "platform-intrinsic" {
+    /// add/fadd
+    pub(crate) fn simd_add<T>(x: T, y: T) -> T;
+
+    /// sub/fsub
+    pub(crate) fn simd_sub<T>(x: T, y: T) -> T;
+
+    /// mul/fmul
+    pub(crate) fn simd_mul<T>(x: T, y: T) -> T;
+
+    /// udiv/sdiv/fdiv
+    pub(crate) fn simd_div<T>(x: T, y: T) -> T;
+
+    /// urem/srem/frem
+    pub(crate) fn simd_rem<T>(x: T, y: T) -> T;
+
+    /// shl
+    pub(crate) fn simd_shl<T>(x: T, y: T) -> T;
+
+    /// lshr/ashr
+    pub(crate) fn simd_shr<T>(x: T, y: T) -> T;
+
+    /// and
+    pub(crate) fn simd_and<T>(x: T, y: T) -> T;
+
+    /// or
+    pub(crate) fn simd_or<T>(x: T, y: T) -> T;
+
+    /// xor
+    pub(crate) fn simd_xor<T>(x: T, y: T) -> T;
+}

crates/core_simd/src/lib.rs

@@ -1,12 +1,14 @@
 #![no_std]
-#![feature(repr_simd)]
+#![feature(repr_simd, platform_intrinsics)]
 #![warn(missing_docs)]
 //! Portable SIMD module.
 
 #[macro_use]
 mod macros;
 
 mod fmt;
+mod intrinsics;
+mod ops;
 
 mod masks;
 pub use masks::*;

crates/core_simd/src/masks.rs

@@ -1,3 +1,13 @@
+/// The error type returned when converting an integer to a mask fails.
+#[derive(Debug, Copy, Clone, PartialEq, Eq)]
+pub struct TryFromMaskError(());
+
+impl core::fmt::Display for TryFromMaskError {
+    fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
+        write!(f, "mask must have all bits set or unset")
+    }
+}
+
 macro_rules! define_mask {
     { $(#[$attr:meta])* struct $name:ident($type:ty); } => {
         $(#[$attr])*
@@ -34,11 +44,52 @@ macro_rules! define_mask {
             }
         }
 
+        impl core::convert::TryFrom<$type> for $name {
+            type Error = TryFromMaskError;
+            fn try_from(value: $type) -> Result<Self, Self::Error> {
+                if value == 0 || !value == 0 {
+                    Ok(Self(value))
+                } else {
+                    Err(TryFromMaskError(()))
+                }
+            }
+        }
+
+        impl core::convert::From<$name> for $type {
+            fn from(value: $name) -> Self {
+                value.0
+            }
+        }
+
         impl core::fmt::Debug for $name {
             fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
                 self.test().fmt(f)
             }
         }
+
+        impl core::fmt::Binary for $name {
+            fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
+                <$type as core::fmt::Binary>::fmt(&self.0, f)
+            }
+        }
+
+        impl core::fmt::Octal for $name {
+            fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
+                <$type as core::fmt::Octal>::fmt(&self.0, f)
+            }
+        }
+
+        impl core::fmt::LowerHex for $name {
+            fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
+                <$type as core::fmt::LowerHex>::fmt(&self.0, f)
+            }
+        }
+
+        impl core::fmt::UpperHex for $name {
+            fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
+                <$type as core::fmt::UpperHex>::fmt(&self.0, f)
+            }
+        }
     }
 }