135 lines
4.0 KiB
Rust
135 lines
4.0 KiB
Rust
#![feature(core_intrinsics)]
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use std::io::Write;
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use std::intrinsics;
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fn main() {
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let _ = ::std::iter::repeat('a' as u8).take(10).collect::<Vec<_>>();
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let stderr = ::std::io::stderr();
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let mut stderr = stderr.lock();
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writeln!(stderr, "some {} text", "<unknown>").unwrap();
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let _ = std::process::Command::new("true").env("c", "d").spawn();
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println!("cargo:rustc-link-lib=z");
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static ONCE: std::sync::Once = std::sync::ONCE_INIT;
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ONCE.call_once(|| {});
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LoopState::Continue(()) == LoopState::Break(());
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// Make sure ByValPair values with differently sized components are correctly passed
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map(None::<(u8, Box<Instruction>)>);
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println!("{}", 2.3f32.exp());
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println!("{}", 2.3f32.exp2());
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println!("{}", 2.3f32.abs());
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println!("{}", 2.3f32.sqrt());
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println!("{}", 2.3f32.floor());
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println!("{}", 2.3f32.ceil());
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println!("{}", 2.3f32.min(1.0));
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println!("{}", 2.3f32.max(1.0));
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println!("{}", 2.3f32.powi(2));
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assert_eq!(0b0000000000000000000000000010000010000000000000000000000000000000_0000000000100000000000000000000000001000000000000100000000000000u128.leading_zeros(), 26);
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assert_eq!(0b0000000000000000000000000010000000000000000000000000000000000000_0000000000000000000000000000000000001000000000000000000010000000u128.trailing_zeros(), 7);
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0i128.checked_div(2i128);
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0u128.checked_div(2u128);
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assert_eq!(1u128 + 2, 3);
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assert_eq!(0b100010000000000000000000000000000u128 >> 10, 0b10001000000000000000000u128);
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assert_eq!(0xFEDCBA987654321123456789ABCDEFu128 >> 64, 0xFEDCBA98765432u128);
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assert_eq!(0xFEDCBA987654321123456789ABCDEFu128 as i128 >> 64, 0xFEDCBA98765432i128);
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assert_eq!(353985398u128 * 932490u128, 330087843781020u128);
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unsafe {
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test_simd();
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}
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}
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#[target_feature(enable = "sse2")]
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unsafe fn test_simd() {
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use std::arch::x86_64::*;
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let x = _mm_setzero_si128();
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let y = _mm_set1_epi16(7);
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let or = _mm_or_si128(x, y);
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let cmp_eq = _mm_cmpeq_epi8(y, y);
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let cmp_lt = _mm_cmplt_epi8(y, y);
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assert_eq!(std::mem::transmute::<_, [u16; 8]>(or), [7, 7, 7, 7, 7, 7, 7, 7]);
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assert_eq!(std::mem::transmute::<_, [u16; 8]>(cmp_eq), [0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff]);
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assert_eq!(std::mem::transmute::<_, [u16; 8]>(cmp_lt), [0, 0, 0, 0, 0, 0, 0, 0]);
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test_mm_slli_si128();
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}
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#[target_feature(enable = "sse2")]
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unsafe fn test_mm_slli_si128() {
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use std::arch::x86_64::*;
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#[rustfmt::skip]
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let a = _mm_setr_epi8(
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
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);
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let r = _mm_slli_si128(a, 1);
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let e = _mm_setr_epi8(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15);
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assert_eq_m128i(r, e);
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#[rustfmt::skip]
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let a = _mm_setr_epi8(
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
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);
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let r = _mm_slli_si128(a, 15);
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let e = _mm_setr_epi8(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1);
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assert_eq_m128i(r, e);
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#[rustfmt::skip]
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let a = _mm_setr_epi8(
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
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);
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let r = _mm_slli_si128(a, 16);
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assert_eq_m128i(r, _mm_set1_epi8(0));
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#[rustfmt::skip]
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let a = _mm_setr_epi8(
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
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);
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let r = _mm_slli_si128(a, -1);
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assert_eq_m128i(_mm_set1_epi8(0), r);
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#[rustfmt::skip]
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let a = _mm_setr_epi8(
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
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);
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let r = _mm_slli_si128(a, -0x80000000);
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assert_eq_m128i(r, _mm_set1_epi8(0));
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}
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fn assert_eq_m128i(x: std::arch::x86_64::__m128i, y: std::arch::x86_64::__m128i) {
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unsafe {
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assert_eq!(std::mem::transmute::<_, [u8; 16]>(x), std::mem::transmute::<_, [u8; 16]>(x));
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}
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}
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#[derive(PartialEq)]
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enum LoopState {
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Continue(()),
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Break(())
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}
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pub enum Instruction {
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Increment,
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Loop,
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}
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fn map(a: Option<(u8, Box<Instruction>)>) -> Option<Box<Instruction>> {
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match a {
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None => None,
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Some((_, instr)) => Some(instr),
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}
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}
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