pub unsafe fn write_binary_avx2(bytes: &mut [u8], words: &[u64])Examples found in repository?
crates/competitive/src/data_structure/bitset.rs (line 119)
92 pub fn to_binary(&self) -> String {
93 const TABLE: [[u8; 8]; 256] = {
94 let mut table = [[b'0'; 8]; 256];
95 let mut i = 0;
96 while i < 256 {
97 let mut j = 0;
98 while j < 8 {
99 table[i][j] |= ((i >> j) & 1) as u8;
100 j += 1;
101 }
102 i += 1;
103 }
104 table
105 };
106 let mut bytes = vec![b'0'; self.size.div_ceil(8) * 8];
107 #[cfg(target_arch = "x86_64")]
108 let end = if self.size >= 64 && avx512_enabled() && is_x86_feature_detected!("avx512bw") {
109 let end = self.size / 64 * 64;
110 // SAFETY: AVX-512BW is available; each output chunk holds one 64-bit word.
111 unsafe {
112 simd::write_binary_avx512(&mut bytes[..end], self.words());
113 }
114 end
115 } else if self.size >= 64 && is_x86_feature_detected!("avx2") {
116 let end = self.size / 64 * 64;
117 // SAFETY: AVX2 is available; each output chunk holds one complete 64-bit word.
118 unsafe {
119 simd::write_binary_avx2(&mut bytes[..end], self.words());
120 }
121 end
122 } else {
123 0
124 };
125 #[cfg(not(target_arch = "x86_64"))]
126 let end = 0;
127 for (chunk, &word) in bytes[end..].chunks_mut(64).zip(&self.words()[end / 64..]) {
128 for (i, byte) in chunk.as_chunks_mut::<8>().0.iter_mut().enumerate() {
129 byte.copy_from_slice(&TABLE[(word >> (i * 8) & 255) as usize]);
130 }
131 }
132 bytes.truncate(self.size);
133 // SAFETY: every output byte is ASCII `0` or `1`.
134 unsafe { String::from_utf8_unchecked(bytes) }
135 }