Add a scalar fallback
This commit is contained in:
parent
41709daffa
commit
72204e948b
|
@ -8,11 +8,321 @@
|
|||
// option. This file may not be copied, modified, or distributed
|
||||
// except according to those terms.
|
||||
|
||||
#[cfg(feature = "pf-no-simd")]
|
||||
pub type F32x4 = scalar::F32x4;
|
||||
#[cfg(feature = "pf-no-simd")]
|
||||
pub type I32x4 = scalar::I32x4;
|
||||
#[cfg(feature = "pf-no-simd")]
|
||||
pub type U32x4 = scalar::U32x4;
|
||||
#[cfg(feature = "pf-no-simd")]
|
||||
pub type U8x16 = scalar::U8x16;
|
||||
|
||||
#[cfg(not(feature = "pf-no-simd"))]
|
||||
pub type F32x4 = x86::F32x4;
|
||||
#[cfg(not(feature = "pf-no-simd"))]
|
||||
pub type I32x4 = x86::I32x4;
|
||||
#[cfg(not(feature = "pf-no-simd"))]
|
||||
pub type U32x4 = x86::U32x4;
|
||||
#[cfg(not(feature = "pf-no-simd"))]
|
||||
pub type U8x16 = x86::U8x16;
|
||||
|
||||
mod scalar {
|
||||
use std::f32;
|
||||
use std::fmt::{self, Debug, Formatter};
|
||||
use std::mem;
|
||||
use std::ops::{Add, Index, IndexMut, Mul, Sub};
|
||||
|
||||
// 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])
|
||||
}
|
||||
|
||||
#[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 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 },
|
||||
])
|
||||
}
|
||||
|
||||
// Casts these packed floats to 64-bit floats.
|
||||
//
|
||||
// NB: This is a pure bitcast and does no actual conversion; only use this if you know what
|
||||
// you're doing.
|
||||
#[inline]
|
||||
pub fn as_f64x2(self) -> F64x2 {
|
||||
unsafe {
|
||||
F64x2(*mem::transmute::<&[f32; 4], &[f64; 2]>(&self.0))
|
||||
}
|
||||
}
|
||||
|
||||
// Converts these packed floats to integers.
|
||||
#[inline]
|
||||
pub fn to_i32x4(self) -> I32x4 {
|
||||
unsafe {
|
||||
I32x4(*mem::transmute::<&[f32; 4], &[i32; 4]>(&self.0))
|
||||
}
|
||||
}
|
||||
|
||||
// Shuffles
|
||||
|
||||
#[inline]
|
||||
pub fn xxyy(self) -> F32x4 {
|
||||
F32x4([self[0], self[0], self[1], self[1]])
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn xyxy(self) -> F32x4 {
|
||||
F32x4([self[0], self[1], self[0], self[1]])
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn xyyx(self) -> F32x4 {
|
||||
F32x4([self[0], self[1], self[1], self[0]])
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn xzxz(self) -> F32x4 {
|
||||
F32x4([self[0], self[2], self[0], self[2]])
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn ywyw(self) -> F32x4 {
|
||||
F32x4([self[1], self[3], self[1], self[3]])
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn zzww(self) -> F32x4 {
|
||||
F32x4([self[2], self[2], self[3], self[3]])
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn zwxy(self) -> F32x4 {
|
||||
F32x4([self[2], self[3], self[0], self[1]])
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn zwzw(self) -> F32x4 {
|
||||
F32x4([self[2], self[3], self[2], self[3]])
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn wxyz(self) -> F32x4 {
|
||||
F32x4([self[3], self[0], self[1], self[2]])
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn interleave(self, other: F32x4) -> (F32x4, F32x4) {
|
||||
(F32x4([self[0], other[0], self[1], other[1]]),
|
||||
F32x4([self[2], other[2], self[3], other[3]]))
|
||||
}
|
||||
}
|
||||
|
||||
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]])
|
||||
}
|
||||
}
|
||||
|
||||
// 64-bit floats
|
||||
|
||||
#[derive(Clone, Copy)]
|
||||
pub struct F64x2(pub [f64; 2]);
|
||||
|
||||
impl F64x2 {
|
||||
// Shuffles
|
||||
|
||||
#[inline]
|
||||
pub fn interleave(self, other: F64x2) -> (F64x2, F64x2) {
|
||||
(F64x2([self.0[0], other.0[0]]), F64x2([self.0[1], other.0[1]]))
|
||||
}
|
||||
|
||||
// Creates `<self[0], other[1]>`.
|
||||
#[inline]
|
||||
pub fn combine_low_high(self, other: F64x2) -> F64x2 {
|
||||
F64x2([self.0[0], other.0[1]])
|
||||
}
|
||||
|
||||
// Casts these packed floats to 32-bit floats.
|
||||
//
|
||||
// NB: This is a pure bitcast and does no actual conversion; only use this if you know what
|
||||
// you're doing.
|
||||
#[inline]
|
||||
pub fn as_f32x4(self) -> F32x4 {
|
||||
unsafe {
|
||||
let vector: &[f32; 4] = mem::transmute::<&[f64; 2], &[f32; 4]>(&self.0);
|
||||
F32x4([vector[0], vector[1], vector[2], vector[3]])
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// 32-bit signed integers
|
||||
|
||||
#[derive(Clone, Copy)]
|
||||
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]),
|
||||
])
|
||||
}
|
||||
}
|
||||
|
||||
impl Index<usize> for I32x4 {
|
||||
type Output = i32;
|
||||
#[inline]
|
||||
fn index(&self, index: usize) -> &i32 {
|
||||
&self.0[index]
|
||||
}
|
||||
}
|
||||
|
||||
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]])
|
||||
}
|
||||
}
|
||||
|
||||
// 32-bit unsigned integers
|
||||
|
||||
#[derive(Clone, Copy)]
|
||||
pub struct U32x4(pub [u32; 4]);
|
||||
|
||||
impl U32x4 {
|
||||
#[inline]
|
||||
fn is_all_ones(&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, table: U8x16) -> U8x16 {
|
||||
let mut result = [0; 16];
|
||||
for index in 0..16 {
|
||||
result[index] = table.0[index]
|
||||
}
|
||||
U8x16(result)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
mod x86 {
|
||||
use std::arch::x86_64::{self, __m128, __m128d, __m128i};
|
||||
use std::cmp::PartialEq;
|
||||
|
|
|
@ -4,6 +4,9 @@ version = "0.1.0"
|
|||
authors = ["Patrick Walton <pcwalton@mimiga.net>"]
|
||||
edition = "2018"
|
||||
|
||||
[features]
|
||||
pf-no-simd = []
|
||||
|
||||
[dependencies]
|
||||
arrayvec = "0.4"
|
||||
bitflags = "1.0"
|
||||
|
|
Loading…
Reference in New Issue