1//! Advanced Vector Extensions (AVX)
2//!
3//! The references are:
4//!
5//! - [Intel 64 and IA-32 Architectures Software Developer's Manual Volume 2:
6//! Instruction Set Reference, A-Z][intel64_ref]. - [AMD64 Architecture
7//! Programmer's Manual, Volume 3: General-Purpose and System
8//! Instructions][amd64_ref].
9//!
10//! [Wikipedia][wiki] provides a quick overview of the instructions available.
11//!
12//! [intel64_ref]: http://www.intel.de/content/dam/www/public/us/en/documents/manuals/64-ia-32-architectures-software-developer-instruction-set-reference-manual-325383.pdf
13//! [amd64_ref]: http://support.amd.com/TechDocs/24594.pdf
14//! [wiki]: https://en.wikipedia.org/wiki/Advanced_Vector_Extensions
15
16use crate::{core_arch::x86::*, mem::transmute};
17
18/// Copies `a` to result, and insert the 64-bit integer `i` into result
19/// at the location specified by `index`.
20///
21/// [Intel's documentation](https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#text=_mm256_insert_epi64)
22#[inline]
23#[rustc_legacy_const_generics(2)]
24#[target_feature(enable = "avx")]
25// This intrinsic has no corresponding instruction.
26#[stable(feature = "simd_x86", since = "1.27.0")]
27pub fn _mm256_insert_epi64<const INDEX: i32>(a: __m256i, i: i64) -> __m256i {
28 static_assert_uimm_bits!(INDEX, 2);
29 unsafe { transmute(src:simd_insert!(a.as_i64x4(), INDEX as u32, i)) }
30}
31
32/// Extracts a 64-bit integer from `a`, selected with `INDEX`.
33///
34/// [Intel's documentation](https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#text=_mm256_extract_epi64)
35#[inline]
36#[target_feature(enable = "avx")]
37#[rustc_legacy_const_generics(1)]
38// This intrinsic has no corresponding instruction.
39#[stable(feature = "simd_x86", since = "1.27.0")]
40pub fn _mm256_extract_epi64<const INDEX: i32>(a: __m256i) -> i64 {
41 static_assert_uimm_bits!(INDEX, 2);
42 unsafe { simd_extract!(a.as_i64x4(), INDEX as u32) }
43}
44
45#[cfg(test)]
46mod tests {
47 use stdarch_test::simd_test;
48
49 use crate::core_arch::arch::x86_64::*;
50
51 #[simd_test(enable = "avx")]
52 unsafe fn test_mm256_insert_epi64() {
53 let a = _mm256_setr_epi64x(1, 2, 3, 4);
54 let r = _mm256_insert_epi64::<3>(a, 0);
55 let e = _mm256_setr_epi64x(1, 2, 3, 0);
56 assert_eq_m256i(r, e);
57 }
58
59 #[simd_test(enable = "avx")]
60 unsafe fn test_mm256_extract_epi64() {
61 let a = _mm256_setr_epi64x(0, 1, 2, 3);
62 let r = _mm256_extract_epi64::<3>(a);
63 assert_eq!(r, 3);
64 }
65}
66