| use crate::{portable, CVWords, IncrementCounter, BLOCK_LEN}; |
| use arrayref::{array_mut_ref, array_ref}; |
| |
| #[cfg(feature = "c_avx512")] |
| #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] |
| use crate::c_avx512; |
| #[cfg(feature = "c_neon")] |
| use crate::c_neon; |
| #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] |
| use crate::{avx2, sse41}; |
| |
| cfg_if::cfg_if! { |
| if #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] { |
| cfg_if::cfg_if! { |
| if #[cfg(feature = "c_avx512")] { |
| pub const MAX_SIMD_DEGREE: usize = 16; |
| } else { |
| pub const MAX_SIMD_DEGREE: usize = 8; |
| } |
| } |
| } else if #[cfg(feature = "c_neon")] { |
| pub const MAX_SIMD_DEGREE: usize = 4; |
| } else { |
| pub const MAX_SIMD_DEGREE: usize = 1; |
| } |
| } |
| |
| // There are some places where we want a static size that's equal to the |
| // MAX_SIMD_DEGREE, but also at least 2. Constant contexts aren't currently |
| // allowed to use cmp::max, so we have to hardcode this additional constant |
| // value. Get rid of this once cmp::max is a const fn. |
| cfg_if::cfg_if! { |
| if #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] { |
| cfg_if::cfg_if! { |
| if #[cfg(feature = "c_avx512")] { |
| pub const MAX_SIMD_DEGREE_OR_2: usize = 16; |
| } else { |
| pub const MAX_SIMD_DEGREE_OR_2: usize = 8; |
| } |
| } |
| } else if #[cfg(feature = "c_neon")] { |
| pub const MAX_SIMD_DEGREE_OR_2: usize = 4; |
| } else { |
| pub const MAX_SIMD_DEGREE_OR_2: usize = 2; |
| } |
| } |
| |
| #[derive(Clone, Copy, Debug)] |
| pub enum Platform { |
| Portable, |
| #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] |
| SSE41, |
| #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] |
| AVX2, |
| #[cfg(feature = "c_avx512")] |
| #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] |
| AVX512, |
| #[cfg(feature = "c_neon")] |
| NEON, |
| } |
| |
| impl Platform { |
| #[allow(unreachable_code)] |
| pub fn detect() -> Self { |
| #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] |
| { |
| #[cfg(feature = "c_avx512")] |
| { |
| if avx512_detected() { |
| return Platform::AVX512; |
| } |
| } |
| if avx2_detected() { |
| return Platform::AVX2; |
| } |
| if sse41_detected() { |
| return Platform::SSE41; |
| } |
| } |
| // We don't use dynamic feature detection for NEON. If the "c_neon" |
| // feature is on, NEON is assumed to be supported. |
| #[cfg(feature = "c_neon")] |
| { |
| return Platform::NEON; |
| } |
| Platform::Portable |
| } |
| |
| pub fn simd_degree(&self) -> usize { |
| let degree = match self { |
| Platform::Portable => 1, |
| #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] |
| Platform::SSE41 => 4, |
| #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] |
| Platform::AVX2 => 8, |
| #[cfg(feature = "c_avx512")] |
| #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] |
| Platform::AVX512 => 16, |
| #[cfg(feature = "c_neon")] |
| Platform::NEON => 4, |
| }; |
| debug_assert!(degree <= MAX_SIMD_DEGREE); |
| degree |
| } |
| |
| pub(crate) fn compress_in_place( |
| &self, |
| cv: &mut CVWords, |
| block: &[u8; BLOCK_LEN], |
| block_len: u8, |
| counter: u64, |
| flags: u8, |
| ) { |
| match self { |
| Platform::Portable => portable::compress_in_place(cv, block, block_len, counter, flags), |
| // Safe because detect() checked for platform support. |
| #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] |
| Platform::SSE41 | Platform::AVX2 => unsafe { |
| sse41::compress_in_place(cv, block, block_len, counter, flags) |
| }, |
| // Safe because detect() checked for platform support. |
| #[cfg(feature = "c_avx512")] |
| #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] |
| Platform::AVX512 => unsafe { |
| c_avx512::compress_in_place(cv, block, block_len, counter, flags) |
| }, |
| // No NEON compress_in_place() implementation yet. |
| #[cfg(feature = "c_neon")] |
| Platform::NEON => portable::compress_in_place(cv, block, block_len, counter, flags), |
| } |
| } |
| |
| pub(crate) fn compress_xof( |
| &self, |
| cv: &CVWords, |
| block: &[u8; BLOCK_LEN], |
| block_len: u8, |
| counter: u64, |
| flags: u8, |
| ) -> [u8; 64] { |
| match self { |
| Platform::Portable => portable::compress_xof(cv, block, block_len, counter, flags), |
| // Safe because detect() checked for platform support. |
| #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] |
| Platform::SSE41 | Platform::AVX2 => unsafe { |
| sse41::compress_xof(cv, block, block_len, counter, flags) |
| }, |
| // Safe because detect() checked for platform support. |
| #[cfg(feature = "c_avx512")] |
| #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] |
| Platform::AVX512 => unsafe { |
| c_avx512::compress_xof(cv, block, block_len, counter, flags) |
| }, |
| // No NEON compress_xof() implementation yet. |
| #[cfg(feature = "c_neon")] |
| Platform::NEON => portable::compress_xof(cv, block, block_len, counter, flags), |
| } |
| } |
| |
| // IMPLEMENTATION NOTE |
| // =================== |
| // hash_many() applies two optimizations. The critically important |
| // optimization is the high-performance parallel SIMD hashing mode, |
| // described in detail in the spec. This more than doubles throughput per |
| // thread. Another optimization is keeping the state vectors transposed |
| // from block to block within a chunk. When state vectors are transposed |
| // after every block, there's a small but measurable performance loss. |
| // Compressing chunks with a dedicated loop avoids this. |
| |
| pub(crate) fn hash_many<A: arrayvec::Array<Item = u8>>( |
| &self, |
| inputs: &[&A], |
| key: &CVWords, |
| counter: u64, |
| increment_counter: IncrementCounter, |
| flags: u8, |
| flags_start: u8, |
| flags_end: u8, |
| out: &mut [u8], |
| ) { |
| match self { |
| Platform::Portable => portable::hash_many( |
| inputs, |
| key, |
| counter, |
| increment_counter, |
| flags, |
| flags_start, |
| flags_end, |
| out, |
| ), |
| // Safe because detect() checked for platform support. |
| #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] |
| Platform::SSE41 => unsafe { |
| sse41::hash_many( |
| inputs, |
| key, |
| counter, |
| increment_counter, |
| flags, |
| flags_start, |
| flags_end, |
| out, |
| ) |
| }, |
| // Safe because detect() checked for platform support. |
| #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] |
| Platform::AVX2 => unsafe { |
| avx2::hash_many( |
| inputs, |
| key, |
| counter, |
| increment_counter, |
| flags, |
| flags_start, |
| flags_end, |
| out, |
| ) |
| }, |
| // Safe because detect() checked for platform support. |
| #[cfg(feature = "c_avx512")] |
| #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] |
| Platform::AVX512 => unsafe { |
| c_avx512::hash_many( |
| inputs, |
| key, |
| counter, |
| increment_counter, |
| flags, |
| flags_start, |
| flags_end, |
| out, |
| ) |
| }, |
| // Assumed to be safe if the "c_neon" feature is on. |
| #[cfg(feature = "c_neon")] |
| Platform::NEON => unsafe { |
| c_neon::hash_many( |
| inputs, |
| key, |
| counter, |
| increment_counter, |
| flags, |
| flags_start, |
| flags_end, |
| out, |
| ) |
| }, |
| } |
| } |
| } |
| |
| // Note that AVX-512 is divided into multiple featuresets, and we use two of |
| // them, F and VL. |
| #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] |
| #[inline(always)] |
| pub fn avx512_detected() -> bool { |
| // Static check, e.g. for building with target-cpu=native. |
| #[cfg(all(target_feature = "avx512f", target_feature = "avx512vl"))] |
| { |
| return true; |
| } |
| // Dyanmic check, if std is enabled. |
| #[cfg(feature = "std")] |
| { |
| if is_x86_feature_detected!("avx512f") && is_x86_feature_detected!("avx512vl") { |
| return true; |
| } |
| } |
| false |
| } |
| |
| #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] |
| #[inline(always)] |
| pub fn avx2_detected() -> bool { |
| // Static check, e.g. for building with target-cpu=native. |
| #[cfg(target_feature = "avx2")] |
| { |
| return true; |
| } |
| // Dyanmic check, if std is enabled. |
| #[cfg(feature = "std")] |
| { |
| if is_x86_feature_detected!("avx2") { |
| return true; |
| } |
| } |
| false |
| } |
| |
| #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] |
| #[inline(always)] |
| pub fn sse41_detected() -> bool { |
| // Static check, e.g. for building with target-cpu=native. |
| #[cfg(target_feature = "sse4.1")] |
| { |
| return true; |
| } |
| // Dyanmic check, if std is enabled. |
| #[cfg(feature = "std")] |
| { |
| if is_x86_feature_detected!("sse4.1") { |
| return true; |
| } |
| } |
| false |
| } |
| |
| #[inline(always)] |
| pub fn words_from_le_bytes_32(bytes: &[u8; 32]) -> [u32; 8] { |
| let mut out = [0; 8]; |
| out[0] = u32::from_le_bytes(*array_ref!(bytes, 0 * 4, 4)); |
| out[1] = u32::from_le_bytes(*array_ref!(bytes, 1 * 4, 4)); |
| out[2] = u32::from_le_bytes(*array_ref!(bytes, 2 * 4, 4)); |
| out[3] = u32::from_le_bytes(*array_ref!(bytes, 3 * 4, 4)); |
| out[4] = u32::from_le_bytes(*array_ref!(bytes, 4 * 4, 4)); |
| out[5] = u32::from_le_bytes(*array_ref!(bytes, 5 * 4, 4)); |
| out[6] = u32::from_le_bytes(*array_ref!(bytes, 6 * 4, 4)); |
| out[7] = u32::from_le_bytes(*array_ref!(bytes, 7 * 4, 4)); |
| out |
| } |
| |
| #[inline(always)] |
| pub fn words_from_le_bytes_64(bytes: &[u8; 64]) -> [u32; 16] { |
| let mut out = [0; 16]; |
| out[0] = u32::from_le_bytes(*array_ref!(bytes, 0 * 4, 4)); |
| out[1] = u32::from_le_bytes(*array_ref!(bytes, 1 * 4, 4)); |
| out[2] = u32::from_le_bytes(*array_ref!(bytes, 2 * 4, 4)); |
| out[3] = u32::from_le_bytes(*array_ref!(bytes, 3 * 4, 4)); |
| out[4] = u32::from_le_bytes(*array_ref!(bytes, 4 * 4, 4)); |
| out[5] = u32::from_le_bytes(*array_ref!(bytes, 5 * 4, 4)); |
| out[6] = u32::from_le_bytes(*array_ref!(bytes, 6 * 4, 4)); |
| out[7] = u32::from_le_bytes(*array_ref!(bytes, 7 * 4, 4)); |
| out[8] = u32::from_le_bytes(*array_ref!(bytes, 8 * 4, 4)); |
| out[9] = u32::from_le_bytes(*array_ref!(bytes, 9 * 4, 4)); |
| out[10] = u32::from_le_bytes(*array_ref!(bytes, 10 * 4, 4)); |
| out[11] = u32::from_le_bytes(*array_ref!(bytes, 11 * 4, 4)); |
| out[12] = u32::from_le_bytes(*array_ref!(bytes, 12 * 4, 4)); |
| out[13] = u32::from_le_bytes(*array_ref!(bytes, 13 * 4, 4)); |
| out[14] = u32::from_le_bytes(*array_ref!(bytes, 14 * 4, 4)); |
| out[15] = u32::from_le_bytes(*array_ref!(bytes, 15 * 4, 4)); |
| out |
| } |
| |
| #[inline(always)] |
| pub fn le_bytes_from_words_32(words: &[u32; 8]) -> [u8; 32] { |
| let mut out = [0; 32]; |
| *array_mut_ref!(out, 0 * 4, 4) = words[0].to_le_bytes(); |
| *array_mut_ref!(out, 1 * 4, 4) = words[1].to_le_bytes(); |
| *array_mut_ref!(out, 2 * 4, 4) = words[2].to_le_bytes(); |
| *array_mut_ref!(out, 3 * 4, 4) = words[3].to_le_bytes(); |
| *array_mut_ref!(out, 4 * 4, 4) = words[4].to_le_bytes(); |
| *array_mut_ref!(out, 5 * 4, 4) = words[5].to_le_bytes(); |
| *array_mut_ref!(out, 6 * 4, 4) = words[6].to_le_bytes(); |
| *array_mut_ref!(out, 7 * 4, 4) = words[7].to_le_bytes(); |
| out |
| } |
| |
| #[inline(always)] |
| pub fn le_bytes_from_words_64(words: &[u32; 16]) -> [u8; 64] { |
| let mut out = [0; 64]; |
| *array_mut_ref!(out, 0 * 4, 4) = words[0].to_le_bytes(); |
| *array_mut_ref!(out, 1 * 4, 4) = words[1].to_le_bytes(); |
| *array_mut_ref!(out, 2 * 4, 4) = words[2].to_le_bytes(); |
| *array_mut_ref!(out, 3 * 4, 4) = words[3].to_le_bytes(); |
| *array_mut_ref!(out, 4 * 4, 4) = words[4].to_le_bytes(); |
| *array_mut_ref!(out, 5 * 4, 4) = words[5].to_le_bytes(); |
| *array_mut_ref!(out, 6 * 4, 4) = words[6].to_le_bytes(); |
| *array_mut_ref!(out, 7 * 4, 4) = words[7].to_le_bytes(); |
| *array_mut_ref!(out, 8 * 4, 4) = words[8].to_le_bytes(); |
| *array_mut_ref!(out, 9 * 4, 4) = words[9].to_le_bytes(); |
| *array_mut_ref!(out, 10 * 4, 4) = words[10].to_le_bytes(); |
| *array_mut_ref!(out, 11 * 4, 4) = words[11].to_le_bytes(); |
| *array_mut_ref!(out, 12 * 4, 4) = words[12].to_le_bytes(); |
| *array_mut_ref!(out, 13 * 4, 4) = words[13].to_le_bytes(); |
| *array_mut_ref!(out, 14 * 4, 4) = words[14].to_le_bytes(); |
| *array_mut_ref!(out, 15 * 4, 4) = words[15].to_le_bytes(); |
| out |
| } |
