src/test/ui/numbers-arithmetic/i128.rs

   1 // run-pass
   2 #![allow(overflowing_literals)]
   3
   4 #![feature(test)]
   5
   6 extern crate test;
   7 use test::black_box as b;
   8
   9 fn main() {
  10     let x: i128 = -1;
  11     assert_eq!(0, !x);
  12     let y: i128 = -2;
  13     assert_eq!(!1, y);
  14     let z: i128 = 0xABCD_EF;
  15     assert_eq!(z * z, 0x734C_C2F2_A521);
  16     assert_eq!(z * z * z * z, 0x33EE_0E2A_54E2_59DA_A0E7_8E41);
  17     assert_eq!(-z * -z, 0x734C_C2F2_A521);
  18     assert_eq!(-z * -z * -z * -z, 0x33EE_0E2A_54E2_59DA_A0E7_8E41);
  19     assert_eq!(-z + -z + -z + -z, -0x2AF3_7BC);
  20     let k: i128 = -0x1234_5678_9ABC_DEFF_EDCB_A987_6543_210;
  21     assert_eq!(k + k, -0x2468_ACF1_3579_BDFF_DB97_530E_CA86_420);
  22     assert_eq!(0, k - k);
  23     assert_eq!(-0x1234_5678_9ABC_DEFF_EDCB_A987_5A86_421, k + z);
  24     assert_eq!(-0x1000_0000_0000_0000_0000_0000_0000_000,
  25                k + 0x234_5678_9ABC_DEFF_EDCB_A987_6543_210);
  26     assert_eq!(-0x6EF5_DE4C_D3BC_2AAA_3BB4_CC5D_D6EE_8, k / 42);
  27     assert_eq!(-k, k / -1);
  28     assert_eq!(-0x91A2_B3C4_D5E6_F8, k >> 65);
  29     assert_eq!(-0xFDB9_7530_ECA8_6420_0000_0000_0000_0000, k << 65);
  30     assert!(k < z);
  31     assert!(y > k);
  32     assert!(y < x);
  33     assert_eq!(x as i64, -1);
  34     assert_eq!(z as i64, 0xABCD_EF);
  35     assert_eq!(k as i64, -0xFEDC_BA98_7654_3210);
  36     assert_eq!(k as u128, 0xFEDC_BA98_7654_3210_0123_4567_89AB_CDF0);
  37     assert_eq!(-k as u128, 0x1234_5678_9ABC_DEFF_EDCB_A987_6543_210);
  38     assert_eq!((-z as f64) as i128, -z);
  39     assert_eq!((-z as f32) as i128, -z);
  40     assert_eq!((-z as f64 * 16.0) as i128, -z * 16);
  41     assert_eq!((-z as f32 * 16.0) as i128, -z * 16);
  42     // Same stuff as above, but blackboxed, to force use of intrinsics
  43     let x: i128 = b(-1);
  44     assert_eq!(0, !x);
  45     let y: i128 = b(-2);
  46     assert_eq!(!1, y);
  47     let z: i128 = b(0xABCD_EF);
  48     assert_eq!(z * z, 0x734C_C2F2_A521);
  49     assert_eq!(z * z * z * z, 0x33EE_0E2A_54E2_59DA_A0E7_8E41);
  50     assert_eq!(-z * -z, 0x734C_C2F2_A521);
  51     assert_eq!(-z * -z * -z * -z, 0x33EE_0E2A_54E2_59DA_A0E7_8E41);
  52     assert_eq!(-z + -z + -z + -z, -0x2AF3_7BC);
  53     let k: i128 = b(-0x1234_5678_9ABC_DEFF_EDCB_A987_6543_210);
  54     assert_eq!(k + k, -0x2468_ACF1_3579_BDFF_DB97_530E_CA86_420);
  55     assert_eq!(0, k - k);
  56     assert_eq!(-0x1234_5678_9ABC_DEFF_EDCB_A987_5A86_421, k + z);
  57     assert_eq!(-0x1000_0000_0000_0000_0000_0000_0000_000,
  58                k + 0x234_5678_9ABC_DEFF_EDCB_A987_6543_210);
  59     assert_eq!(-0x6EF5_DE4C_D3BC_2AAA_3BB4_CC5D_D6EE_8, k / 42);
  60     assert_eq!(-k, k / -1);
  61     assert_eq!(-0x91A2_B3C4_D5E6_F8, k >> 65);
  62     assert_eq!(-0xFDB9_7530_ECA8_6420_0000_0000_0000_0000, k << 65);
  63     assert!(k < z);
  64     assert!(y > k);
  65     assert!(y < x);
  66     assert_eq!(x as i64, -1);
  67     assert_eq!(z as i64, 0xABCD_EF);
  68     assert_eq!(k as i64, -0xFEDC_BA98_7654_3210);
  69     assert_eq!(k as u128, 0xFEDC_BA98_7654_3210_0123_4567_89AB_CDF0);
  70     assert_eq!(-k as u128, 0x1234_5678_9ABC_DEFF_EDCB_A987_6543_210);
  71     assert_eq!((-z as f64) as i128, -z);
  72     assert_eq!((-z as f32) as i128, -z);
  73     assert_eq!((-z as f64 * 16.0) as i128, -z * 16);
  74     assert_eq!((-z as f32 * 16.0) as i128, -z * 16);
  75     // formatting
  76     let j: i128 = -(1 << 67);
  77     assert_eq!("-147573952589676412928", format!("{}", j));
  78     assert_eq!("fffffffffffffff80000000000000000", format!("{:x}", j));
  79     assert_eq!("3777777777777777777760000000000000000000000", format!("{:o}", j));
  80     assert_eq!("1111111111111111111111111111111111111111111111111111111111111\
  81                 0000000000000000000000000000000000000000000000000000000000000000000",
  82                format!("{:b}", j));
  83     assert_eq!("-147573952589676412928", format!("{:?}", j));
  84     // common traits
  85     assert_eq!(x, b(x.clone()));
  86     // overflow checks
  87     assert_eq!((-z).checked_mul(-z), Some(0x734C_C2F2_A521));
  88     assert_eq!((z).checked_mul(z), Some(0x734C_C2F2_A521));
  89     assert_eq!((k).checked_mul(k), None);
  90     let l: i128 = b(i128::MIN);
  91     let o: i128 = b(17);
  92     assert_eq!(l.checked_sub(b(2)), None);
  93     assert_eq!(l.checked_add(l), None);
  94     assert_eq!((-(l + 1)).checked_add(2), None);
  95     assert_eq!(l.checked_sub(l), Some(0));
  96     assert_eq!(b(1u128).checked_shl(b(127)), Some(1 << 127));
  97     assert_eq!(o.checked_shl(b(128)), None);
  98
  99     // https://github.com/rust-lang/rust/issues/41228
 100     assert_eq!(b(-87559967289969187895646876466835277875_i128) /
 101                b(84285771033834995895337664386045050880_i128),
 102                -1i128);
 103
 104     // iter-arithmetic traits
 105     assert_eq!(10i128, [1i128, 2, 3, 4].iter().sum());
 106     assert_eq!(24i128, [1i128, 2, 3, 4].iter().product());
 107 }