half/binary16/arch/
x86.rs

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1use core::{mem::MaybeUninit, ptr};
2
3#[cfg(target_arch = "x86")]
4use core::arch::x86::{
5    __m128, __m128i, __m256, _mm256_cvtph_ps, _mm256_cvtps_ph, _mm_cvtph_ps,
6    _MM_FROUND_TO_NEAREST_INT,
7};
8#[cfg(target_arch = "x86_64")]
9use core::arch::x86_64::{
10    __m128, __m128i, __m256, _mm256_cvtph_ps, _mm256_cvtps_ph, _mm_cvtph_ps, _mm_cvtps_ph,
11    _MM_FROUND_TO_NEAREST_INT,
12};
13
14#[cfg(target_arch = "x86")]
15use core::arch::x86::_mm_cvtps_ph;
16
17use super::convert_chunked_slice_8;
18
19/////////////// x86/x86_64 f16c ////////////////
20
21#[target_feature(enable = "f16c")]
22#[inline]
23pub(super) unsafe fn f16_to_f32_x86_f16c(i: u16) -> f32 {
24    let mut vec = MaybeUninit::<__m128i>::zeroed();
25    vec.as_mut_ptr().cast::<u16>().write(i);
26    let retval = _mm_cvtph_ps(vec.assume_init());
27    *(&retval as *const __m128).cast()
28}
29
30#[target_feature(enable = "f16c")]
31#[inline]
32pub(super) unsafe fn f32_to_f16_x86_f16c(f: f32) -> u16 {
33    let mut vec = MaybeUninit::<__m128>::zeroed();
34    vec.as_mut_ptr().cast::<f32>().write(f);
35    let retval = _mm_cvtps_ph(vec.assume_init(), _MM_FROUND_TO_NEAREST_INT);
36    *(&retval as *const __m128i).cast()
37}
38
39#[target_feature(enable = "f16c")]
40#[inline]
41pub(super) unsafe fn f16x4_to_f32x4_x86_f16c(v: &[u16; 4]) -> [f32; 4] {
42    let mut vec = MaybeUninit::<__m128i>::zeroed();
43    ptr::copy_nonoverlapping(v.as_ptr(), vec.as_mut_ptr().cast(), 4);
44    let retval = _mm_cvtph_ps(vec.assume_init());
45    *(&retval as *const __m128).cast()
46}
47
48#[target_feature(enable = "f16c")]
49#[inline]
50pub(super) unsafe fn f32x4_to_f16x4_x86_f16c(v: &[f32; 4]) -> [u16; 4] {
51    let mut vec = MaybeUninit::<__m128>::uninit();
52    ptr::copy_nonoverlapping(v.as_ptr(), vec.as_mut_ptr().cast(), 4);
53    let retval = _mm_cvtps_ph(vec.assume_init(), _MM_FROUND_TO_NEAREST_INT);
54    *(&retval as *const __m128i).cast()
55}
56
57#[target_feature(enable = "f16c")]
58#[inline]
59pub(super) unsafe fn f16x4_to_f64x4_x86_f16c(v: &[u16; 4]) -> [f64; 4] {
60    let array = f16x4_to_f32x4_x86_f16c(v);
61    // Let compiler vectorize this regular cast for now.
62    // TODO: investigate auto-detecting sse2/avx convert features
63    [
64        array[0] as f64,
65        array[1] as f64,
66        array[2] as f64,
67        array[3] as f64,
68    ]
69}
70
71#[target_feature(enable = "f16c")]
72#[inline]
73pub(super) unsafe fn f64x4_to_f16x4_x86_f16c(v: &[f64; 4]) -> [u16; 4] {
74    // Let compiler vectorize this regular cast for now.
75    // TODO: investigate auto-detecting sse2/avx convert features
76    let v = [v[0] as f32, v[1] as f32, v[2] as f32, v[3] as f32];
77    f32x4_to_f16x4_x86_f16c(&v)
78}
79
80#[target_feature(enable = "f16c")]
81#[inline]
82pub(super) unsafe fn f16x8_to_f32x8_x86_f16c(v: &[u16; 8]) -> [f32; 8] {
83    let mut vec = MaybeUninit::<__m128i>::zeroed();
84    ptr::copy_nonoverlapping(v.as_ptr(), vec.as_mut_ptr().cast(), 8);
85    let retval = _mm256_cvtph_ps(vec.assume_init());
86    *(&retval as *const __m256).cast()
87}
88
89#[target_feature(enable = "f16c")]
90#[inline]
91pub(super) unsafe fn f32x8_to_f16x8_x86_f16c(v: &[f32; 8]) -> [u16; 8] {
92    let mut vec = MaybeUninit::<__m256>::uninit();
93    ptr::copy_nonoverlapping(v.as_ptr(), vec.as_mut_ptr().cast(), 8);
94    let retval = _mm256_cvtps_ph(vec.assume_init(), _MM_FROUND_TO_NEAREST_INT);
95    *(&retval as *const __m128i).cast()
96}
97
98#[target_feature(enable = "f16c")]
99#[inline]
100pub(super) unsafe fn f16x8_to_f64x8_x86_f16c(v: &[u16; 8]) -> [f64; 8] {
101    let array = f16x8_to_f32x8_x86_f16c(v);
102    // Let compiler vectorize this regular cast for now.
103    // TODO: investigate auto-detecting sse2/avx convert features
104    [
105        array[0] as f64,
106        array[1] as f64,
107        array[2] as f64,
108        array[3] as f64,
109        array[4] as f64,
110        array[5] as f64,
111        array[6] as f64,
112        array[7] as f64,
113    ]
114}
115
116#[target_feature(enable = "f16c")]
117#[inline]
118pub(super) unsafe fn f64x8_to_f16x8_x86_f16c(v: &[f64; 8]) -> [u16; 8] {
119    // Let compiler vectorize this regular cast for now.
120    // TODO: investigate auto-detecting sse2/avx convert features
121    let v = [
122        v[0] as f32,
123        v[1] as f32,
124        v[2] as f32,
125        v[3] as f32,
126        v[4] as f32,
127        v[5] as f32,
128        v[6] as f32,
129        v[7] as f32,
130    ];
131    f32x8_to_f16x8_x86_f16c(&v)
132}
half/binary16/arch/x86.rs

half/binary16/arch/
x86.rs
