Split out the swizzles into separate modules

simd/src/arm/mod.rs

@@ -0,0 +1,417 @@
+// pathfinder/simd/src/arm.rs
+//
+// Copyright © 2019 The Pathfinder Project Developers.
+//
+// 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.
+
+use std::arch::aarch64::{self, float32x4_t, int32x4_t, uint32x4_t, uint64x2_t, uint8x16_t};
+use std::arch::aarch64::{uint8x8x2_t, uint8x8_t};
+use std::f32;
+use std::fmt::{self, Debug, Formatter};
+use std::mem;
+use std::ops::{Add, Index, IndexMut, Mul, Sub};
+
+mod swizzle_f32x4;
+mod swizzle_i32x4;
+
+// 32-bit floats
+
+#[derive(Clone, Copy)]
+pub struct F32x4(pub float32x4_t);
+
+impl F32x4 {
+    #[inline]
+    pub fn new(a: f32, b: f32, c: f32, d: f32) -> F32x4 {
+        unsafe { F32x4(mem::transmute([a, b, c, d])) }
+    }
+
+    #[inline]
+    pub fn splat(x: f32) -> F32x4 {
+        F32x4::new(x, x, x, x)
+    }
+
+    // Basic operations
+
+    #[inline]
+    pub fn approx_recip(self) -> F32x4 {
+        unsafe { F32x4(vrecpe_v4f32(self.0)) }
+    }
+
+    #[inline]
+    pub fn min(self, other: F32x4) -> F32x4 {
+        unsafe { F32x4(simd_fmin(self.0, other.0)) }
+    }
+
+    #[inline]
+    pub fn max(self, other: F32x4) -> F32x4 {
+        unsafe { F32x4(simd_fmax(self.0, other.0)) }
+    }
+
+    #[inline]
+    pub fn clamp(self, min: F32x4, max: F32x4) -> F32x4 {
+        self.max(min).min(max)
+    }
+
+    #[inline]
+    pub fn abs(self) -> F32x4 {
+        unsafe { F32x4(fabs_v4f32(self.0)) }
+    }
+
+    #[inline]
+    pub fn floor(self) -> F32x4 {
+        unsafe { F32x4(floor_v4f32(self.0)) }
+    }
+
+    #[inline]
+    pub fn ceil(self) -> F32x4 {
+        unsafe { F32x4(ceil_v4f32(self.0)) }
+    }
+
+    // Packed comparisons
+
+    #[inline]
+    pub fn packed_eq(self, other: F32x4) -> U32x4 {
+        unsafe { U32x4(simd_eq(self.0, other.0)) }
+    }
+
+    #[inline]
+    pub fn packed_gt(self, other: F32x4) -> U32x4 {
+        unsafe { U32x4(simd_gt(self.0, other.0)) }
+    }
+
+    #[inline]
+    pub fn packed_le(self, other: F32x4) -> U32x4 {
+        unsafe { U32x4(simd_le(self.0, other.0)) }
+    }
+
+    #[inline]
+    pub fn packed_lt(self, other: F32x4) -> U32x4 {
+        unsafe { U32x4(simd_lt(self.0, other.0)) }
+    }
+
+    // Converts these packed floats to integers.
+    #[inline]
+    pub fn to_i32x4(self) -> I32x4 {
+        unsafe { I32x4(simd_cast(self.0)) }
+    }
+
+    // Concatenations
+
+    #[inline]
+    pub fn concat_xy_xy(self, other: F32x4) -> F32x4 {
+        unsafe { F32x4(simd_shuffle4(self.0, other.0, [0, 1, 4, 5])) }
+    }
+
+    #[inline]
+    pub fn concat_xy_zw(self, other: F32x4) -> F32x4 {
+        unsafe { F32x4(simd_shuffle4(self.0, other.0, [0, 1, 6, 7])) }
+    }
+
+    #[inline]
+    pub fn concat_zw_zw(self, other: F32x4) -> F32x4 {
+        unsafe { F32x4(simd_shuffle4(self.0, other.0, [2, 3, 6, 7])) }
+    }
+
+    #[inline]
+    pub fn concat_wz_yx(self, other: F32x4) -> F32x4 {
+        unsafe { F32x4(simd_shuffle4(self.0, other.0, [3, 2, 5, 4])) }
+    }
+
+    #[inline]
+    pub fn cross(&self, other: F32x4) -> F32x4 {
+        unimplemented!()
+    }
+}
+
+impl Default for F32x4 {
+    #[inline]
+    fn default() -> F32x4 {
+        F32x4::new(0.0, 0.0, 0.0, 0.0)
+    }
+}
+
+impl Index<usize> for F32x4 {
+    type Output = f32;
+    #[inline]
+    fn index(&self, index: usize) -> &f32 {
+        unsafe {
+            let ptr = &self.0 as *const float32x4_t as *const f32;
+            mem::transmute::<*const f32, &f32>(ptr.offset(index as isize))
+        }
+    }
+}
+
+impl IndexMut<usize> for F32x4 {
+    #[inline]
+    fn index_mut(&mut self, index: usize) -> &mut f32 {
+        unsafe {
+            let ptr = &mut self.0 as *mut float32x4_t as *mut f32;
+            mem::transmute::<*mut f32, &mut f32>(ptr.offset(index as isize))
+        }
+    }
+}
+
+impl Debug for F32x4 {
+    #[inline]
+    fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> {
+        write!(f, "<{}, {}, {}, {}>", self[0], self[1], self[2], self[3])
+    }
+}
+
+impl PartialEq for F32x4 {
+    #[inline]
+    fn eq(&self, other: &F32x4) -> bool {
+        self.packed_eq(*other).is_all_ones()
+    }
+}
+
+impl Add<F32x4> for F32x4 {
+    type Output = F32x4;
+    #[inline]
+    fn add(self, other: F32x4) -> F32x4 {
+        unsafe {
+            F32x4(simd_add(self.0, other.0))
+        }
+    }
+}
+
+impl Mul<F32x4> for F32x4 {
+    type Output = F32x4;
+    #[inline]
+    fn mul(self, other: F32x4) -> F32x4 {
+        unsafe {
+            F32x4(simd_mul(self.0, other.0))
+        }
+    }
+}
+
+impl Sub<F32x4> for F32x4 {
+    type Output = F32x4;
+    #[inline]
+    fn sub(self, other: F32x4) -> F32x4 {
+        unsafe {
+            F32x4(simd_sub(self.0, other.0))
+        }
+    }
+}
+
+// 32-bit signed integers
+
+#[derive(Clone, Copy, Debug)]
+pub struct I32x4(pub int32x4_t);
+
+impl I32x4 {
+    #[inline]
+    pub fn new(a: i32, b: i32, c: i32, d: i32) -> I32x4 {
+        unsafe { I32x4(mem::transmute([a, b, c, d])) }
+    }
+
+    #[inline]
+    pub fn splat(x: i32) -> I32x4 {
+        I32x4::new(x, x, x, x)
+    }
+
+    #[inline]
+    pub fn as_u8x16(self) -> U8x16 {
+        unsafe { U8x16(*mem::transmute::<&int32x4_t, &uint8x16_t>(&self.0)) }
+    }
+
+    #[inline]
+    pub fn min(self, other: I32x4) -> I32x4 {
+        unsafe { I32x4(simd_fmin(self.0, other.0)) }
+    }
+
+    // Packed comparisons
+
+    #[inline]
+    pub fn packed_eq(self, other: I32x4) -> U32x4 {
+        unsafe { U32x4(simd_eq(self.0, other.0)) }
+    }
+
+    #[inline]
+    pub fn packed_le(self, other: I32x4) -> U32x4 {
+        unsafe { U32x4(simd_le(self.0, other.0)) }
+    }
+
+    // Concatenations
+
+    #[inline]
+    pub fn concat_xy_xy(self, other: I32x4) -> I32x4 {
+        unsafe { I32x4(simd_shuffle4(self.0, other.0, [0, 1, 4, 5])) }
+    }
+
+    // Conversions
+
+    /// Converts these packed integers to floats.
+    #[inline]
+    pub fn to_f32x4(self) -> F32x4 {
+        unsafe { F32x4(simd_cast(self.0)) }
+    }
+}
+
+impl Default for I32x4 {
+    #[inline]
+    fn default() -> I32x4 {
+        I32x4::new(0, 0, 0, 0)
+    }
+}
+
+impl Index<usize> for I32x4 {
+    type Output = i32;
+    #[inline]
+    fn index(&self, index: usize) -> &i32 {
+        unsafe {
+            let ptr = &self.0 as *const int32x4_t as *const i32;
+            mem::transmute::<*const i32, &i32>(ptr.offset(index as isize))
+        }
+    }
+}
+
+impl IndexMut<usize> for I32x4 {
+    #[inline]
+    fn index_mut(&mut self, index: usize) -> &mut i32 {
+        unsafe {
+            let ptr = &mut self.0 as *mut int32x4_t as *mut i32;
+            mem::transmute::<*mut i32, &mut i32>(ptr.offset(index as isize))
+        }
+    }
+}
+
+
+impl Add<I32x4> for I32x4 {
+    type Output = I32x4;
+    #[inline]
+    fn add(self, other: I32x4) -> I32x4 {
+        unsafe { I32x4(simd_add(self.0, other.0)) }
+    }
+}
+
+impl Sub<I32x4> for I32x4 {
+    type Output = I32x4;
+    #[inline]
+    fn sub(self, other: I32x4) -> I32x4 {
+        unsafe { I32x4(simd_sub(self.0, other.0)) }
+    }
+}
+
+impl Mul<I32x4> for I32x4 {
+    type Output = I32x4;
+    #[inline]
+    fn mul(self, other: I32x4) -> I32x4 {
+        unsafe { I32x4(simd_mul(self.0, other.0)) }
+    }
+}
+
+impl PartialEq for I32x4 {
+    #[inline]
+    fn eq(&self, other: &I32x4) -> bool {
+        self.packed_eq(*other).is_all_ones()
+    }
+}
+
+// 32-bit unsigned integers
+
+#[derive(Clone, Copy)]
+pub struct U32x4(pub uint32x4_t);
+
+impl U32x4 {
+    #[inline]
+    pub fn is_all_ones(&self) -> bool {
+        unsafe { aarch64::vminvq_u32(self.0) == !0 }
+    }
+
+    #[inline]
+    pub fn is_all_zeroes(&self) -> bool {
+        unsafe { aarch64::vmaxvq_u32(self.0) == 0 }
+    }
+}
+
+impl Index<usize> for U32x4 {
+    type Output = u32;
+    #[inline]
+    fn index(&self, index: usize) -> &u32 {
+        unsafe {
+            let ptr = &self.0 as *const uint32x4_t as *const u32;
+            mem::transmute::<*const u32, &u32>(ptr.offset(index as isize))
+        }
+    }
+}
+
+// 8-bit unsigned integers
+
+#[derive(Clone, Copy)]
+pub struct U8x16(pub uint8x16_t);
+
+impl U8x16 {
+    #[inline]
+    pub fn as_i32x4(self) -> I32x4 {
+        unsafe {
+            I32x4(*mem::transmute::<&uint8x16_t, &int32x4_t>(&self.0))
+        }
+    }
+
+    #[inline]
+    pub fn shuffle(self, indices: U8x16) -> U8x16 {
+        unsafe {
+            let table = mem::transmute::<uint8x16_t, uint8x8x2_t>(self.0);
+            let low  = aarch64::vtbl2_u8(table, indices.extract_low());
+            let high = aarch64::vtbl2_u8(table, indices.extract_high());
+            U8x16(aarch64::vcombine_u8(low, high))
+        }
+    }
+
+    #[inline]
+    fn extract_low(self) -> uint8x8_t {
+        unsafe {
+            let low = simd_extract(mem::transmute::<uint8x16_t, uint64x2_t>(self.0), 0);
+            mem::transmute::<u64, uint8x8_t>(low)
+        }
+    }
+
+    #[inline]
+    fn extract_high(self) -> uint8x8_t {
+        unsafe {
+            let high = simd_extract(mem::transmute::<uint8x16_t, uint64x2_t>(self.0), 1);
+            mem::transmute::<u64, uint8x8_t>(high)
+        }
+    }
+}
+
+// Intrinsics
+
+extern "platform-intrinsic" {
+    fn simd_add<T>(x: T, y: T) -> T;
+    fn simd_mul<T>(x: T, y: T) -> T;
+    fn simd_sub<T>(x: T, y: T) -> T;
+
+    fn simd_fmin<T>(x: T, y: T) -> T;
+    fn simd_fmax<T>(x: T, y: T) -> T;
+
+    fn simd_eq<T, U>(x: T, y: T) -> U;
+    fn simd_gt<T, U>(x: T, y: T) -> U;
+    fn simd_le<T, U>(x: T, y: T) -> U;
+    fn simd_lt<T, U>(x: T, y: T) -> U;
+
+    fn simd_shuffle4<T, U>(x: T, y: T, idx: [u32; 4]) -> U;
+
+    fn simd_cast<T, U>(x: T) -> U;
+
+    fn simd_insert<T, U>(x: T, index: u32, value: U) -> T;
+    fn simd_extract<T, U>(x: T, index: u32) -> U;
+}
+
+extern "C" {
+    #[link_name = "llvm.fabs.v4f32"]
+    fn fabs_v4f32(a: float32x4_t) -> float32x4_t;
+    #[link_name = "llvm.floor.v4f32"]
+    fn floor_v4f32(a: float32x4_t) -> float32x4_t;
+    #[link_name = "llvm.ceil.v4f32"]
+    fn ceil_v4f32(a: float32x4_t) -> float32x4_t;
+
+    #[link_name = "llvm.aarch64.neon.frecpe.v4f32"]
+    fn vrecpe_v4f32(a: float32x4_t) -> float32x4_t;
+}

simd/src/scalar/mod.rs

@@ -0,0 +1,360 @@
+// pathfinder/simd/src/scalar.rs
+//
+// Copyright © 2019 The Pathfinder Project Developers.
+//
+// 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.
+
+use std::f32;
+use std::fmt::{self, Debug, Formatter};
+use std::mem;
+use std::ops::{Add, Index, IndexMut, Mul, Sub};
+
+mod swizzle_f32x4;
+mod swizzle_i32x4;
+
+// 32-bit floats
+
+#[derive(Clone, Copy, Default, PartialEq)]
+pub struct F32x4(pub [f32; 4]);
+
+impl F32x4 {
+    #[inline]
+    pub fn new(a: f32, b: f32, c: f32, d: f32) -> F32x4 {
+        F32x4([a, b, c, d])
+    }
+
+    #[inline]
+    pub fn splat(x: f32) -> F32x4 {
+        F32x4([x; 4])
+    }
+
+    // Basic operations
+
+    #[inline]
+    pub fn approx_recip(self) -> F32x4 {
+        F32x4([1.0 / self[0], 1.0 / self[1], 1.0 / self[2], 1.0 / self[3]])
+    }
+
+    #[inline]
+    pub fn min(self, other: F32x4) -> F32x4 {
+        F32x4([
+            self[0].min(other[0]),
+            self[1].min(other[1]),
+            self[2].min(other[2]),
+            self[3].min(other[3]),
+        ])
+    }
+
+    #[inline]
+    pub fn max(self, other: F32x4) -> F32x4 {
+        F32x4([
+            self[0].max(other[0]),
+            self[1].max(other[1]),
+            self[2].max(other[2]),
+            self[3].max(other[3]),
+        ])
+    }
+
+    #[inline]
+    pub fn clamp(self, min: F32x4, max: F32x4) -> F32x4 {
+        self.max(min).min(max)
+    }
+
+    #[inline]
+    pub fn abs(self) -> F32x4 {
+        F32x4([self[0].abs(), self[1].abs(), self[2].abs(), self[3].abs()])
+    }
+
+    #[inline]
+    pub fn floor(self) -> F32x4 {
+        F32x4([self[0].floor(), self[1].floor(), self[2].floor(), self[3].floor()])
+    }
+
+    #[inline]
+    pub fn ceil(self) -> F32x4 {
+        F32x4([self[0].ceil(), self[1].ceil(), self[2].ceil(), self[3].ceil()])
+    }
+
+    // Packed comparisons
+
+    #[inline]
+    pub fn packed_eq(self, other: F32x4) -> U32x4 {
+        U32x4([
+            if self[0] == other[0] { !0 } else { 0 },
+            if self[1] == other[1] { !0 } else { 0 },
+            if self[2] == other[2] { !0 } else { 0 },
+            if self[3] == other[3] { !0 } else { 0 },
+        ])
+    }
+
+    #[inline]
+    pub fn packed_gt(self, other: F32x4) -> U32x4 {
+        U32x4([
+            if self[0] > other[0] { !0 } else { 0 },
+            if self[1] > other[1] { !0 } else { 0 },
+            if self[2] > other[2] { !0 } else { 0 },
+            if self[3] > other[3] { !0 } else { 0 },
+        ])
+    }
+
+    #[inline]
+    pub fn packed_le(self, other: F32x4) -> U32x4 {
+        U32x4([
+            if self[0] <= other[0] { !0 } else { 0 },
+            if self[1] <= other[1] { !0 } else { 0 },
+            if self[2] <= other[2] { !0 } else { 0 },
+            if self[3] <= other[3] { !0 } else { 0 },
+        ])
+    }
+
+    #[inline]
+    pub fn packed_lt(self, other: F32x4) -> U32x4 {
+        U32x4([
+            if self[0] < other[0] { !0 } else { 0 },
+            if self[1] < other[1] { !0 } else { 0 },
+            if self[2] < other[2] { !0 } else { 0 },
+            if self[3] < other[3] { !0 } else { 0 },
+        ])
+    }
+
+    // Converts these packed floats to integers.
+    #[inline]
+    pub fn to_i32x4(self) -> I32x4 {
+        I32x4([self[0] as i32, self[1] as i32, self[2] as i32, self[3] as i32])
+    }
+
+    // Concatenations
+
+    #[inline]
+    pub fn concat_xy_xy(self, other: F32x4) -> F32x4 {
+        F32x4([self[0], self[1], other[0], other[1]])
+    }
+
+    #[inline]
+    pub fn concat_xy_zw(self, other: F32x4) -> F32x4 {
+        F32x4([self[0], self[1], other[2], other[3]])
+    }
+
+    #[inline]
+    pub fn concat_zw_zw(self, other: F32x4) -> F32x4 {
+        F32x4([self[2], self[3], other[2], other[3]])
+    }
+
+    #[inline]
+    pub fn concat_wz_yx(self, other: F32x4) -> F32x4 {
+        F32x4([self[3], self[2], other[1], other[0]])
+    }
+
+    #[inline]
+    pub fn cross(&self, other: F32x4) -> F32x4 {
+        unimplemented!()
+    }
+}
+
+impl Index<usize> for F32x4 {
+    type Output = f32;
+    #[inline]
+    fn index(&self, index: usize) -> &f32 {
+        &self.0[index]
+    }
+}
+
+impl IndexMut<usize> for F32x4 {
+    #[inline]
+    fn index_mut(&mut self, index: usize) -> &mut f32 {
+        &mut self.0[index]
+    }
+}
+
+impl Debug for F32x4 {
+    #[inline]
+    fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> {
+        write!(f, "<{}, {}, {}, {}>", self[0], self[1], self[2], self[3])
+    }
+}
+
+impl Add<F32x4> for F32x4 {
+    type Output = F32x4;
+    #[inline]
+    fn add(self, other: F32x4) -> F32x4 {
+        F32x4([self[0] + other[0], self[1] + other[1], self[2] + other[2], self[3] + other[3]])
+    }
+}
+
+impl Mul<F32x4> for F32x4 {
+    type Output = F32x4;
+    #[inline]
+    fn mul(self, other: F32x4) -> F32x4 {
+        F32x4([self[0] * other[0], self[1] * other[1], self[2] * other[2], self[3] * other[3]])
+    }
+}
+
+impl Sub<F32x4> for F32x4 {
+    type Output = F32x4;
+    #[inline]
+    fn sub(self, other: F32x4) -> F32x4 {
+        F32x4([self[0] - other[0], self[1] - other[1], self[2] - other[2], self[3] - other[3]])
+    }
+}
+
+// 32-bit signed integers
+
+#[derive(Clone, Copy, Default, Debug, PartialEq)]
+pub struct I32x4([i32; 4]);
+
+impl I32x4 {
+    #[inline]
+    pub fn new(a: i32, b: i32, c: i32, d: i32) -> I32x4 {
+        I32x4([a, b, c, d])
+    }
+
+    #[inline]
+    pub fn splat(x: i32) -> I32x4 {
+        I32x4([x; 4])
+    }
+
+    #[inline]
+    pub fn as_u8x16(self) -> U8x16 {
+        unsafe {
+            U8x16(*mem::transmute::<&[i32; 4], &[u8; 16]>(&self.0))
+        }
+    }
+
+    #[inline]
+    pub fn min(self, other: I32x4) -> I32x4 {
+        I32x4([
+            self[0].min(other[0]),
+            self[1].min(other[1]),
+            self[2].min(other[2]),
+            self[3].min(other[3]),
+        ])
+    }
+
+    // Packed comparisons
+
+    #[inline]
+    pub fn packed_eq(self, other: I32x4) -> U32x4 {
+        U32x4([
+            if self[0] == other[0] { !0 } else { 0 },
+            if self[1] == other[1] { !0 } else { 0 },
+            if self[2] == other[2] { !0 } else { 0 },
+            if self[3] == other[3] { !0 } else { 0 },
+        ])
+    }
+
+    #[inline]
+    pub fn packed_le(self, other: I32x4) -> U32x4 {
+        U32x4([
+            if self[0] <= other[0] { !0 } else { 0 },
+            if self[1] <= other[1] { !0 } else { 0 },
+            if self[2] <= other[2] { !0 } else { 0 },
+            if self[3] <= other[3] { !0 } else { 0 },
+        ])
+    }
+
+    // Concatenations
+
+    #[inline]
+    pub fn concat_xy_xy(self, other: I32x4) -> I32x4 {
+        I32x4([self[0], self[1], other[0], other[1]])
+    }
+
+    // Conversions
+
+    /// Converts these packed integers to floats.
+    #[inline]
+    pub fn to_f32x4(self) -> F32x4 {
+        F32x4([self[0] as f32, self[1] as f32, self[2] as f32, self[3] as f32])
+    }
+}
+
+impl Index<usize> for I32x4 {
+    type Output = i32;
+    #[inline]
+    fn index(&self, index: usize) -> &i32 {
+        &self.0[index]
+    }
+}
+
+impl IndexMut<usize> for I32x4 {
+    #[inline]
+    fn index_mut(&mut self, index: usize) -> &mut i32 {
+        &mut self.0[index]
+    }
+}
+
+impl Add<I32x4> for I32x4 {
+    type Output = I32x4;
+    #[inline]
+    fn add(self, other: I32x4) -> I32x4 {
+        I32x4([self[0] + other[0], self[1] + other[1], self[2] + other[2], self[3] + other[3]])
+    }
+}
+
+impl Sub<I32x4> for I32x4 {
+    type Output = I32x4;
+    #[inline]
+    fn sub(self, other: I32x4) -> I32x4 {
+        I32x4([self[0] - other[0], self[1] - other[1], self[2] - other[2], self[3] - other[3]])
+    }
+}
+
+impl Mul<I32x4> for I32x4 {
+    type Output = I32x4;
+    #[inline]
+    fn mul(self, other: I32x4) -> I32x4 {
+        I32x4([self[0] * other[0], self[1] * other[1], self[2] * other[2], self[3] * other[3]])
+    }
+}
+
+// 32-bit unsigned integers
+
+#[derive(Clone, Copy)]
+pub struct U32x4(pub [u32; 4]);
+
+impl U32x4 {
+    #[inline]
+    pub fn is_all_ones(&self) -> bool {
+        self[0] == !0 && self[1] == !0 && self[2] == !0 && self[3] == !0
+    }
+
+    #[inline]
+    pub fn is_all_zeroes(&self) -> bool {
+        self[0] ==  0 && self[1] ==  0 && self[2] ==  0 && self[3] ==  0
+    }
+}
+
+impl Index<usize> for U32x4 {
+    type Output = u32;
+    #[inline]
+    fn index(&self, index: usize) -> &u32 {
+        &self.0[index]
+    }
+}
+
+// 8-bit unsigned integers
+
+#[derive(Clone, Copy)]
+pub struct U8x16([u8; 16]);
+
+impl U8x16 {
+    #[inline]
+    pub fn as_i32x4(self) -> I32x4 {
+        unsafe {
+            I32x4(*mem::transmute::<&[u8; 16], &[i32; 4]>(&self.0))
+        }
+    }
+
+    #[inline]
+    pub fn shuffle(self, indices: U8x16) -> U8x16 {
+        let mut result = [0; 16];
+        for index in 0..16 {
+            result[index] = self.0[(indices.0[index] & 0x0f) as usize]
+        }
+        U8x16(result)
+    }
+}

simd/src/x86/mod.rs

@@ -0,0 +1,454 @@
+// pathfinder/simd/src/x86.rs
+//
+// Copyright © 2019 The Pathfinder Project Developers.
+//
+// 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.
+
+use std::arch::x86_64::{self, __m128, __m128i};
+use std::cmp::PartialEq;
+use std::fmt::{self, Debug, Formatter};
+use std::mem;
+use std::ops::{Add, BitXor, Index, IndexMut, Mul, Not, Sub};
+
+mod swizzle_f32x4;
+mod swizzle_i32x4;
+
+// 32-bit floats
+
+#[derive(Clone, Copy)]
+pub struct F32x4(pub __m128);
+
+impl F32x4 {
+    // Constructors
+
+    #[inline]
+    pub fn new(a: f32, b: f32, c: f32, d: f32) -> F32x4 {
+        unsafe {
+            let vector = [a, b, c, d];
+            F32x4(x86_64::_mm_loadu_ps(vector.as_ptr()))
+        }
+    }
+
+    #[inline]
+    pub fn splat(x: f32) -> F32x4 {
+        unsafe { F32x4(x86_64::_mm_set1_ps(x)) }
+    }
+
+    // Basic operations
+
+    #[inline]
+    pub fn approx_recip(self) -> F32x4 {
+        unsafe { F32x4(x86_64::_mm_rcp_ps(self.0)) }
+    }
+
+    #[inline]
+    pub fn min(self, other: F32x4) -> F32x4 {
+        unsafe { F32x4(x86_64::_mm_min_ps(self.0, other.0)) }
+    }
+
+    #[inline]
+    pub fn max(self, other: F32x4) -> F32x4 {
+        unsafe { F32x4(x86_64::_mm_max_ps(self.0, other.0)) }
+    }
+
+    #[inline]
+    pub fn clamp(self, min: F32x4, max: F32x4) -> F32x4 {
+        self.max(min).min(max)
+    }
+
+    #[inline]
+    pub fn abs(self) -> F32x4 {
+        unsafe {
+            let tmp = x86_64::_mm_srli_epi32(I32x4::splat(-1).0, 1);
+            F32x4(x86_64::_mm_and_ps(x86_64::_mm_castsi128_ps(tmp), self.0))
+        }
+    }
+
+    #[inline]
+    pub fn floor(self) -> F32x4 {
+        unsafe { F32x4(x86_64::_mm_floor_ps(self.0)) }
+    }
+
+    #[inline]
+    pub fn ceil(self) -> F32x4 {
+        unsafe { F32x4(x86_64::_mm_ceil_ps(self.0)) }
+    }
+
+    // Packed comparisons
+
+    #[inline]
+    pub fn packed_eq(self, other: F32x4) -> U32x4 {
+        unsafe {
+            U32x4(x86_64::_mm_castps_si128(x86_64::_mm_cmpeq_ps(
+                self.0, other.0,
+            )))
+        }
+    }
+
+    #[inline]
+    pub fn packed_gt(self, other: F32x4) -> U32x4 {
+        unsafe {
+            U32x4(x86_64::_mm_castps_si128(x86_64::_mm_cmpgt_ps(
+                self.0, other.0,
+            )))
+        }
+    }
+
+    #[inline]
+    pub fn packed_lt(self, other: F32x4) -> U32x4 {
+        other.packed_gt(self)
+    }
+
+    #[inline]
+    pub fn packed_le(self, other: F32x4) -> U32x4 {
+        !self.packed_gt(other)
+    }
+
+    // Conversions
+
+    /// Converts these packed floats to integers.
+    #[inline]
+    pub fn to_i32x4(self) -> I32x4 {
+        unsafe { I32x4(x86_64::_mm_cvtps_epi32(self.0)) }
+    }
+
+    // Concatenations
+
+    #[inline]
+    pub fn concat_xy_xy(self, other: F32x4) -> F32x4 {
+        unsafe {
+            let this = x86_64::_mm_castps_pd(self.0);
+            let other = x86_64::_mm_castps_pd(other.0);
+            let result = x86_64::_mm_unpacklo_pd(this, other);
+            F32x4(x86_64::_mm_castpd_ps(result))
+        }
+    }
+
+    #[inline]
+    pub fn concat_xy_zw(self, other: F32x4) -> F32x4 {
+        unsafe {
+            let this = x86_64::_mm_castps_pd(self.0);
+            let other = x86_64::_mm_castps_pd(other.0);
+            let result = x86_64::_mm_shuffle_pd(this, other, 0b10);
+            F32x4(x86_64::_mm_castpd_ps(result))
+        }
+    }
+
+    #[inline]
+    pub fn concat_zw_zw(self, other: F32x4) -> F32x4 {
+        unsafe {
+            let this = x86_64::_mm_castps_pd(self.0);
+            let other = x86_64::_mm_castps_pd(other.0);
+            let result = x86_64::_mm_unpackhi_pd(this, other);
+            F32x4(x86_64::_mm_castpd_ps(result))
+        }
+    }
+
+    #[inline]
+    pub fn concat_wz_yx(self, other: F32x4) -> F32x4 {
+        unsafe { F32x4(x86_64::_mm_shuffle_ps(self.0, other.0, 0b0001_1011)) }
+    }
+
+    // FIXME(pcwalton): Move to `Point3DF32`!
+    #[inline]
+    pub fn cross(&self, other: F32x4) -> F32x4 {
+        self.yzxw() * other.zxyw() - self.zxyw() * other.yzxw()
+    }
+}
+
+impl Default for F32x4 {
+    #[inline]
+    fn default() -> F32x4 {
+        unsafe { F32x4(x86_64::_mm_setzero_ps()) }
+    }
+}
+
+impl Index<usize> for F32x4 {
+    type Output = f32;
+    #[inline]
+    fn index(&self, index: usize) -> &f32 {
+        unsafe { &mem::transmute::<&__m128, &[f32; 4]>(&self.0)[index] }
+    }
+}
+
+impl IndexMut<usize> for F32x4 {
+    #[inline]
+    fn index_mut(&mut self, index: usize) -> &mut f32 {
+        unsafe { &mut mem::transmute::<&mut __m128, &mut [f32; 4]>(&mut self.0)[index] }
+    }
+}
+
+impl Debug for F32x4 {
+    #[inline]
+    fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> {
+        write!(f, "<{}, {}, {}, {}>", self[0], self[1], self[2], self[3])
+    }
+}
+
+impl PartialEq for F32x4 {
+    #[inline]
+    fn eq(&self, other: &F32x4) -> bool {
+        self.packed_eq(*other).is_all_ones()
+    }
+}
+
+impl Add<F32x4> for F32x4 {
+    type Output = F32x4;
+    #[inline]
+    fn add(self, other: F32x4) -> F32x4 {
+        unsafe { F32x4(x86_64::_mm_add_ps(self.0, other.0)) }
+    }
+}
+
+impl Mul<F32x4> for F32x4 {
+    type Output = F32x4;
+    #[inline]
+    fn mul(self, other: F32x4) -> F32x4 {
+        unsafe { F32x4(x86_64::_mm_mul_ps(self.0, other.0)) }
+    }
+}
+
+impl Sub<F32x4> for F32x4 {
+    type Output = F32x4;
+    #[inline]
+    fn sub(self, other: F32x4) -> F32x4 {
+        unsafe { F32x4(x86_64::_mm_sub_ps(self.0, other.0)) }
+    }
+}
+
+// 32-bit signed integers
+
+#[derive(Clone, Copy)]
+pub struct I32x4(pub __m128i);
+
+impl I32x4 {
+    // Constructors
+
+    #[inline]
+    pub fn new(a: i32, b: i32, c: i32, d: i32) -> I32x4 {
+        unsafe {
+            let vector = [a, b, c, d];
+            I32x4(x86_64::_mm_loadu_si128(vector.as_ptr() as *const __m128i))
+        }
+    }
+
+    #[inline]
+    pub fn splat(x: i32) -> I32x4 {
+        unsafe { I32x4(x86_64::_mm_set1_epi32(x)) }
+    }
+
+    // Concatenations
+
+    #[inline]
+    pub fn concat_xy_xy(self, other: I32x4) -> I32x4 {
+        unsafe {
+            let this = x86_64::_mm_castsi128_pd(self.0);
+            let other = x86_64::_mm_castsi128_pd(other.0);
+            let result = x86_64::_mm_unpacklo_pd(this, other);
+            I32x4(x86_64::_mm_castpd_si128(result))
+        }
+    }
+
+    // Conversions
+
+    #[inline]
+    pub fn as_u8x16(self) -> U8x16 {
+        U8x16(self.0)
+    }
+
+    /// Converts these packed integers to floats.
+    #[inline]
+    pub fn to_f32x4(self) -> F32x4 {
+        unsafe { F32x4(x86_64::_mm_cvtepi32_ps(self.0)) }
+    }
+
+    // Basic operations
+
+    #[inline]
+    pub fn min(self, other: I32x4) -> I32x4 {
+        unsafe { I32x4(x86_64::_mm_min_epi32(self.0, other.0)) }
+    }
+
+    // Packed comparisons
+
+    #[inline]
+    pub fn packed_eq(self, other: I32x4) -> U32x4 {
+        unsafe { U32x4(x86_64::_mm_cmpeq_epi32(self.0, other.0)) }
+    }
+
+    // Comparisons
+
+    #[inline]
+    pub fn packed_gt(self, other: I32x4) -> U32x4 {
+        unsafe {
+            U32x4(x86_64::_mm_cmpgt_epi32(self.0, other.0))
+        }
+    }
+
+    #[inline]
+    pub fn packed_le(self, other: I32x4) -> U32x4 {
+        !self.packed_gt(other)
+    }
+}
+
+impl Default for I32x4 {
+    #[inline]
+    fn default() -> I32x4 {
+        unsafe { I32x4(x86_64::_mm_setzero_si128()) }
+    }
+}
+
+impl Index<usize> for I32x4 {
+    type Output = i32;
+    #[inline]
+    fn index(&self, index: usize) -> &i32 {
+        unsafe { &mem::transmute::<&__m128i, &[i32; 4]>(&self.0)[index] }
+    }
+}
+
+impl IndexMut<usize> for I32x4 {
+    #[inline]
+    fn index_mut(&mut self, index: usize) -> &mut i32 {
+        unsafe { &mut mem::transmute::<&mut __m128i, &mut [i32; 4]>(&mut self.0)[index] }
+    }
+}
+
+impl Add<I32x4> for I32x4 {
+    type Output = I32x4;
+    #[inline]
+    fn add(self, other: I32x4) -> I32x4 {
+        unsafe { I32x4(x86_64::_mm_add_epi32(self.0, other.0)) }
+    }
+}
+
+impl Sub<I32x4> for I32x4 {
+    type Output = I32x4;
+    #[inline]
+    fn sub(self, other: I32x4) -> I32x4 {
+        unsafe { I32x4(x86_64::_mm_sub_epi32(self.0, other.0)) }
+    }
+}
+
+impl Mul<I32x4> for I32x4 {
+    type Output = I32x4;
+    #[inline]
+    fn mul(self, other: I32x4) -> I32x4 {
+        unsafe { I32x4(x86_64::_mm_mullo_epi32(self.0, other.0)) }
+    }
+}
+
+impl Debug for I32x4 {
+    #[inline]
+    fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> {
+        write!(f, "<{}, {}, {}, {}>", self[0], self[1], self[2], self[3])
+    }
+}
+
+impl PartialEq for I32x4 {
+    #[inline]
+    fn eq(&self, other: &I32x4) -> bool {
+        self.packed_eq(*other).is_all_ones()
+    }
+}
+
+// 32-bit unsigned integers
+
+#[derive(Clone, Copy)]
+pub struct U32x4(pub __m128i);
+
+impl U32x4 {
+    // Constructors
+
+    #[inline]
+    pub fn new(a: u32, b: u32, c: u32, d: u32) -> U32x4 {
+        unsafe {
+            let vector = [a, b, c, d];
+            U32x4(x86_64::_mm_loadu_si128(vector.as_ptr() as *const __m128i))
+        }
+    }
+
+    #[inline]
+    pub fn splat(x: u32) -> U32x4 {
+        unsafe { U32x4(x86_64::_mm_set1_epi32(x as i32)) }
+    }
+
+    // Basic operations
+
+    #[inline]
+    pub fn is_all_ones(self) -> bool {
+        unsafe { x86_64::_mm_test_all_ones(self.0) != 0 }
+    }
+
+    #[inline]
+    pub fn is_all_zeroes(self) -> bool {
+        unsafe { x86_64::_mm_test_all_zeros(self.0, self.0) != 0 }
+    }
+
+    // Packed comparisons
+
+    #[inline]
+    pub fn packed_eq(self, other: U32x4) -> U32x4 {
+        unsafe { U32x4(x86_64::_mm_cmpeq_epi32(self.0, other.0)) }
+    }
+}
+
+impl Debug for U32x4 {
+    #[inline]
+    fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> {
+        write!(f, "<{}, {}, {}, {}>", self[0], self[1], self[2], self[3])
+    }
+}
+
+impl Index<usize> for U32x4 {
+    type Output = u32;
+    #[inline]
+    fn index(&self, index: usize) -> &u32 {
+        unsafe { &mem::transmute::<&__m128i, &[u32; 4]>(&self.0)[index] }
+    }
+}
+
+impl PartialEq for U32x4 {
+    #[inline]
+    fn eq(&self, other: &U32x4) -> bool {
+        self.packed_eq(*other).is_all_ones()
+    }
+}
+
+impl Not for U32x4 {
+    type Output = U32x4;
+    #[inline]
+    fn not(self) -> U32x4 {
+        self ^ U32x4::splat(!0)
+    }
+}
+
+impl BitXor<U32x4> for U32x4 {
+    type Output = U32x4;
+    #[inline]
+    fn bitxor(self, other: U32x4) -> U32x4 {
+        unsafe {
+            U32x4(x86_64::_mm_xor_si128(self.0, other.0))
+        }
+    }
+}
+
+// 8-bit unsigned integers
+
+#[derive(Clone, Copy)]
+pub struct U8x16(pub __m128i);
+
+impl U8x16 {
+    #[inline]
+    pub fn as_i32x4(self) -> I32x4 {
+        I32x4(self.0)
+    }
+
+    #[inline]
+    pub fn shuffle(self, indices: U8x16) -> U8x16 {
+        unsafe { U8x16(x86_64::_mm_shuffle_epi8(self.0, indices.0)) }
+    }
+}

simd/src/x86/swizzle_f32x4.rs

@@ -1,4 +1,4 @@
-// pathfinder/simd/src/x86.rs
+// pathfinder/simd/src/x86/swizzle_f32x4.rs
 //
 // Copyright © 2019 The Pathfinder Project Developers.
 //
@@ -8,113 +8,10 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::arch::x86_64::{self, __m128, __m128i};
+use crate::x86::F32x4;
-use std::cmp::PartialEq;
+use std::arch::x86_64;
-use std::fmt::{self, Debug, Formatter};
-use std::mem;
-use std::ops::{Add, BitXor, Index, IndexMut, Mul, Not, Sub};
-
-// 32-bit floats
-
-#[derive(Clone, Copy)]
-pub struct F32x4(pub __m128);
 
 impl F32x4 {
-    // Constructors
-
-    #[inline]
-    pub fn new(a: f32, b: f32, c: f32, d: f32) -> F32x4 {
-        unsafe {
-            let vector = [a, b, c, d];
-            F32x4(x86_64::_mm_loadu_ps(vector.as_ptr()))
-        }
-    }
-
-    #[inline]
-    pub fn splat(x: f32) -> F32x4 {
-        unsafe { F32x4(x86_64::_mm_set1_ps(x)) }
-    }
-
-    // Basic operations
-
-    #[inline]
-    pub fn approx_recip(self) -> F32x4 {
-        unsafe { F32x4(x86_64::_mm_rcp_ps(self.0)) }
-    }
-
-    #[inline]
-    pub fn min(self, other: F32x4) -> F32x4 {
-        unsafe { F32x4(x86_64::_mm_min_ps(self.0, other.0)) }
-    }
-
-    #[inline]
-    pub fn max(self, other: F32x4) -> F32x4 {
-        unsafe { F32x4(x86_64::_mm_max_ps(self.0, other.0)) }
-    }
-
-    #[inline]
-    pub fn clamp(self, min: F32x4, max: F32x4) -> F32x4 {
-        self.max(min).min(max)
-    }
-
-    #[inline]
-    pub fn abs(self) -> F32x4 {
-        unsafe {
-            let tmp = x86_64::_mm_srli_epi32(I32x4::splat(-1).0, 1);
-            F32x4(x86_64::_mm_and_ps(x86_64::_mm_castsi128_ps(tmp), self.0))
-        }
-    }
-
-    #[inline]
-    pub fn floor(self) -> F32x4 {
-        unsafe { F32x4(x86_64::_mm_floor_ps(self.0)) }
-    }
-
-    #[inline]
-    pub fn ceil(self) -> F32x4 {
-        unsafe { F32x4(x86_64::_mm_ceil_ps(self.0)) }
-    }
-
-    // Packed comparisons
-
-    #[inline]
-    pub fn packed_eq(self, other: F32x4) -> U32x4 {
-        unsafe {
-            U32x4(x86_64::_mm_castps_si128(x86_64::_mm_cmpeq_ps(
-                self.0, other.0,
-            )))
-        }
-    }
-
-    #[inline]
-    pub fn packed_gt(self, other: F32x4) -> U32x4 {
-        unsafe {
-            U32x4(x86_64::_mm_castps_si128(x86_64::_mm_cmpgt_ps(
-                self.0, other.0,
-            )))
-        }
-    }
-
-    #[inline]
-    pub fn packed_lt(self, other: F32x4) -> U32x4 {
-        other.packed_gt(self)
-    }
-
-    #[inline]
-    pub fn packed_le(self, other: F32x4) -> U32x4 {
-        !self.packed_gt(other)
-    }
-
-    // Conversions
-
-    /// Converts these packed floats to integers.
-    #[inline]
-    pub fn to_i32x4(self) -> I32x4 {
-        unsafe { I32x4(x86_64::_mm_cvtps_epi32(self.0)) }
-    }
-
-    // Swizzles
-
     #[inline]
     pub fn xxxx(self) -> F32x4 {
         unsafe { F32x4(x86_64::_mm_shuffle_ps(self.0, self.0, 0)) }
@@ -1394,374 +1291,4 @@ impl F32x4 {
     pub fn wwww(self) -> F32x4 {
         unsafe { F32x4(x86_64::_mm_shuffle_ps(self.0, self.0, 255)) }
     }
-
-    // Concatenations
-
-    #[inline]
-    pub fn concat_xy_xy(self, other: F32x4) -> F32x4 {
-        unsafe {
-            let this = x86_64::_mm_castps_pd(self.0);
-            let other = x86_64::_mm_castps_pd(other.0);
-            let result = x86_64::_mm_unpacklo_pd(this, other);
-            F32x4(x86_64::_mm_castpd_ps(result))
-        }
-    }
-
-    #[inline]
-    pub fn concat_xy_zw(self, other: F32x4) -> F32x4 {
-        unsafe {
-            let this = x86_64::_mm_castps_pd(self.0);
-            let other = x86_64::_mm_castps_pd(other.0);
-            let result = x86_64::_mm_shuffle_pd(this, other, 0b10);
-            F32x4(x86_64::_mm_castpd_ps(result))
-        }
-    }
-
-    #[inline]
-    pub fn concat_zw_zw(self, other: F32x4) -> F32x4 {
-        unsafe {
-            let this = x86_64::_mm_castps_pd(self.0);
-            let other = x86_64::_mm_castps_pd(other.0);
-            let result = x86_64::_mm_unpackhi_pd(this, other);
-            F32x4(x86_64::_mm_castpd_ps(result))
-        }
-    }
-
-    #[inline]
-    pub fn concat_wz_yx(self, other: F32x4) -> F32x4 {
-        unsafe { F32x4(x86_64::_mm_shuffle_ps(self.0, other.0, 0b0001_1011)) }
-    }
-
-    // FIXME(pcwalton): Move to `Point3DF32`!
-    #[inline]
-    pub fn cross(&self, other: F32x4) -> F32x4 {
-        self.yzxw() * other.zxyw() - self.zxyw() * other.yzxw()
-    }
-}
-
-impl Default for F32x4 {
-    #[inline]
-    fn default() -> F32x4 {
-        unsafe { F32x4(x86_64::_mm_setzero_ps()) }
-    }
-}
-
-impl Index<usize> for F32x4 {
-    type Output = f32;
-    #[inline]
-    fn index(&self, index: usize) -> &f32 {
-        unsafe { &mem::transmute::<&__m128, &[f32; 4]>(&self.0)[index] }
-    }
-}
-
-impl IndexMut<usize> for F32x4 {
-    #[inline]
-    fn index_mut(&mut self, index: usize) -> &mut f32 {
-        unsafe { &mut mem::transmute::<&mut __m128, &mut [f32; 4]>(&mut self.0)[index] }
-    }
-}
-
-impl Debug for F32x4 {
-    #[inline]
-    fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> {
-        write!(f, "<{}, {}, {}, {}>", self[0], self[1], self[2], self[3])
-    }
-}
-
-impl PartialEq for F32x4 {
-    #[inline]
-    fn eq(&self, other: &F32x4) -> bool {
-        self.packed_eq(*other).is_all_ones()
-    }
-}
-
-impl Add<F32x4> for F32x4 {
-    type Output = F32x4;
-    #[inline]
-    fn add(self, other: F32x4) -> F32x4 {
-        unsafe { F32x4(x86_64::_mm_add_ps(self.0, other.0)) }
-    }
-}
-
-impl Mul<F32x4> for F32x4 {
-    type Output = F32x4;
-    #[inline]
-    fn mul(self, other: F32x4) -> F32x4 {
-        unsafe { F32x4(x86_64::_mm_mul_ps(self.0, other.0)) }
-    }
-}
-
-impl Sub<F32x4> for F32x4 {
-    type Output = F32x4;
-    #[inline]
-    fn sub(self, other: F32x4) -> F32x4 {
-        unsafe { F32x4(x86_64::_mm_sub_ps(self.0, other.0)) }
-    }
-}
-
-// 32-bit signed integers
-
-#[derive(Clone, Copy)]
-pub struct I32x4(pub __m128i);
-
-impl I32x4 {
-    // Constructors
-
-    #[inline]
-    pub fn new(a: i32, b: i32, c: i32, d: i32) -> I32x4 {
-        unsafe {
-            let vector = [a, b, c, d];
-            I32x4(x86_64::_mm_loadu_si128(vector.as_ptr() as *const __m128i))
-        }
-    }
-
-    #[inline]
-    pub fn splat(x: i32) -> I32x4 {
-        unsafe { I32x4(x86_64::_mm_set1_epi32(x)) }
-    }
-
-    // Concatenations
-
-    #[inline]
-    pub fn concat_xy_xy(self, other: I32x4) -> I32x4 {
-        unsafe {
-            let this = x86_64::_mm_castsi128_pd(self.0);
-            let other = x86_64::_mm_castsi128_pd(other.0);
-            let result = x86_64::_mm_unpacklo_pd(this, other);
-            I32x4(x86_64::_mm_castpd_si128(result))
-        }
-    }
-
-    // Conversions
-
-    #[inline]
-    pub fn as_u8x16(self) -> U8x16 {
-        U8x16(self.0)
-    }
-
-    /// Converts these packed integers to floats.
-    #[inline]
-    pub fn to_f32x4(self) -> F32x4 {
-        unsafe { F32x4(x86_64::_mm_cvtepi32_ps(self.0)) }
-    }
-
-    // Basic operations
-
-    #[inline]
-    pub fn min(self, other: I32x4) -> I32x4 {
-        unsafe { I32x4(x86_64::_mm_min_epi32(self.0, other.0)) }
-    }
-
-    // Packed comparisons
-
-    #[inline]
-    pub fn packed_eq(self, other: I32x4) -> U32x4 {
-        unsafe { U32x4(x86_64::_mm_cmpeq_epi32(self.0, other.0)) }
-    }
-
-    // Swizzles
-
-    #[inline]
-    pub fn xyxy(self) -> I32x4 {
-        unsafe {
-            let this = x86_64::_mm_castsi128_ps(self.0);
-            I32x4(x86_64::_mm_castps_si128(x86_64::_mm_shuffle_ps(this, this, 68)))
-        }
-    }
-
-    #[inline]
-    pub fn xwzy(self) -> I32x4 {
-        unsafe {
-            let this = x86_64::_mm_castsi128_ps(self.0);
-            I32x4(x86_64::_mm_castps_si128(x86_64::_mm_shuffle_ps(this, this, 108)))
-        }
-    }
-
-    #[inline]
-    pub fn zyxw(self) -> I32x4 {
-        unsafe {
-            let this = x86_64::_mm_castsi128_ps(self.0);
-            I32x4(x86_64::_mm_castps_si128(x86_64::_mm_shuffle_ps(this, this, 198)))
-        }
-    }
-
-    #[inline]
-    pub fn zwxy(self) -> I32x4 {
-        unsafe {
-            let this = x86_64::_mm_castsi128_ps(self.0);
-            I32x4(x86_64::_mm_castps_si128(x86_64::_mm_shuffle_ps(this, this, 78)))
-        }
-    }
-
-    // Comparisons
-
-    #[inline]
-    pub fn packed_gt(self, other: I32x4) -> U32x4 {
-        unsafe {
-            U32x4(x86_64::_mm_cmpgt_epi32(self.0, other.0))
-        }
-    }
-
-    #[inline]
-    pub fn packed_le(self, other: I32x4) -> U32x4 {
-        !self.packed_gt(other)
-    }
-}
-
-impl Default for I32x4 {
-    #[inline]
-    fn default() -> I32x4 {
-        unsafe { I32x4(x86_64::_mm_setzero_si128()) }
-    }
-}
-
-impl Index<usize> for I32x4 {
-    type Output = i32;
-    #[inline]
-    fn index(&self, index: usize) -> &i32 {
-        unsafe { &mem::transmute::<&__m128i, &[i32; 4]>(&self.0)[index] }
-    }
-}
-
-impl IndexMut<usize> for I32x4 {
-    #[inline]
-    fn index_mut(&mut self, index: usize) -> &mut i32 {
-        unsafe { &mut mem::transmute::<&mut __m128i, &mut [i32; 4]>(&mut self.0)[index] }
-    }
-}
-
-impl Add<I32x4> for I32x4 {
-    type Output = I32x4;
-    #[inline]
-    fn add(self, other: I32x4) -> I32x4 {
-        unsafe { I32x4(x86_64::_mm_add_epi32(self.0, other.0)) }
-    }
-}
-
-impl Sub<I32x4> for I32x4 {
-    type Output = I32x4;
-    #[inline]
-    fn sub(self, other: I32x4) -> I32x4 {
-        unsafe { I32x4(x86_64::_mm_sub_epi32(self.0, other.0)) }
-    }
-}
-
-impl Mul<I32x4> for I32x4 {
-    type Output = I32x4;
-    #[inline]
-    fn mul(self, other: I32x4) -> I32x4 {
-        unsafe { I32x4(x86_64::_mm_mullo_epi32(self.0, other.0)) }
-    }
-}
-
-impl Debug for I32x4 {
-    #[inline]
-    fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> {
-        write!(f, "<{}, {}, {}, {}>", self[0], self[1], self[2], self[3])
-    }
-}
-
-impl PartialEq for I32x4 {
-    #[inline]
-    fn eq(&self, other: &I32x4) -> bool {
-        self.packed_eq(*other).is_all_ones()
-    }
-}
-
-// 32-bit unsigned integers
-
-#[derive(Clone, Copy)]
-pub struct U32x4(pub __m128i);
-
-impl U32x4 {
-    // Constructors
-
-    #[inline]
-    pub fn new(a: u32, b: u32, c: u32, d: u32) -> U32x4 {
-        unsafe {
-            let vector = [a, b, c, d];
-            U32x4(x86_64::_mm_loadu_si128(vector.as_ptr() as *const __m128i))
-        }
-    }
-
-    #[inline]
-    pub fn splat(x: u32) -> U32x4 {
-        unsafe { U32x4(x86_64::_mm_set1_epi32(x as i32)) }
-    }
-
-    // Basic operations
-
-    #[inline]
-    pub fn is_all_ones(self) -> bool {
-        unsafe { x86_64::_mm_test_all_ones(self.0) != 0 }
-    }
-
-    #[inline]
-    pub fn is_all_zeroes(self) -> bool {
-        unsafe { x86_64::_mm_test_all_zeros(self.0, self.0) != 0 }
-    }
-
-    // Packed comparisons
-
-    #[inline]
-    pub fn packed_eq(self, other: U32x4) -> U32x4 {
-        unsafe { U32x4(x86_64::_mm_cmpeq_epi32(self.0, other.0)) }
-    }
-}
-
-impl Debug for U32x4 {
-    #[inline]
-    fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> {
-        write!(f, "<{}, {}, {}, {}>", self[0], self[1], self[2], self[3])
-    }
-}
-
-impl Index<usize> for U32x4 {
-    type Output = u32;
-    #[inline]
-    fn index(&self, index: usize) -> &u32 {
-        unsafe { &mem::transmute::<&__m128i, &[u32; 4]>(&self.0)[index] }
-    }
-}
-
-impl PartialEq for U32x4 {
-    #[inline]
-    fn eq(&self, other: &U32x4) -> bool {
-        self.packed_eq(*other).is_all_ones()
-    }
-}
-
-impl Not for U32x4 {
-    type Output = U32x4;
-    #[inline]
-    fn not(self) -> U32x4 {
-        self ^ U32x4::splat(!0)
-    }
-}
-
-impl BitXor<U32x4> for U32x4 {
-    type Output = U32x4;
-    #[inline]
-    fn bitxor(self, other: U32x4) -> U32x4 {
-        unsafe {
-            U32x4(x86_64::_mm_xor_si128(self.0, other.0))
-        }
-    }
-}
-
-// 8-bit unsigned integers
-
-#[derive(Clone, Copy)]
-pub struct U8x16(pub __m128i);
-
-impl U8x16 {
-    #[inline]
-    pub fn as_i32x4(self) -> I32x4 {
-        I32x4(self.0)
-    }
-
-    #[inline]
-    pub fn shuffle(self, indices: U8x16) -> U8x16 {
-        unsafe { U8x16(x86_64::_mm_shuffle_epi8(self.0, indices.0)) }
-    }
 }

simd/src/x86/swizzle_i32x4.rs

@@ -0,0 +1,47 @@
+// pathfinder/simd/src/x86/swizzle_i32x4.rs
+//
+// Copyright © 2019 The Pathfinder Project Developers.
+//
+// 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.
+
+use crate::x86::I32x4;
+use std::arch::x86_64;
+
+// TODO(pcwalton): Add the remaining swizzles.
+impl I32x4 {
+    #[inline]
+    pub fn xyxy(self) -> I32x4 {
+        unsafe {
+            let this = x86_64::_mm_castsi128_ps(self.0);
+            I32x4(x86_64::_mm_castps_si128(x86_64::_mm_shuffle_ps(this, this, 68)))
+        }
+    }
+
+    #[inline]
+    pub fn xwzy(self) -> I32x4 {
+        unsafe {
+            let this = x86_64::_mm_castsi128_ps(self.0);
+            I32x4(x86_64::_mm_castps_si128(x86_64::_mm_shuffle_ps(this, this, 108)))
+        }
+    }
+
+    #[inline]
+    pub fn zyxw(self) -> I32x4 {
+        unsafe {
+            let this = x86_64::_mm_castsi128_ps(self.0);
+            I32x4(x86_64::_mm_castps_si128(x86_64::_mm_shuffle_ps(this, this, 198)))
+        }
+    }
+
+    #[inline]
+    pub fn zwxy(self) -> I32x4 {
+        unsafe {
+            let this = x86_64::_mm_castsi128_ps(self.0);
+            I32x4(x86_64::_mm_castps_si128(x86_64::_mm_shuffle_ps(this, this, 78)))
+        }
+    }
+}