#![cfg(feature = "compact")] mod bellerophon; use bellerophon::{bellerophon_test, compute_float32, compute_float64}; use minimal_lexical::num::Float; #[test] fn halfway_round_down_test() { // Halfway, round-down tests bellerophon_test::(9007199254740992, 0, false, 0, 1076); bellerophon_test::( 9007199254740993, 0, false, 9223372036854776832, 1065 + f64::INVALID_FP, ); bellerophon_test::(9007199254740994, 0, false, 1, 1076); bellerophon_test::(18014398509481984, 0, false, 0, 1077); bellerophon_test::( 18014398509481986, 0, false, 9223372036854776832, 1066 + f64::INVALID_FP, ); bellerophon_test::(18014398509481988, 0, false, 1, 1077); bellerophon_test::(9223372036854775808, 0, false, 0, 1086); bellerophon_test::( 9223372036854776832, 0, false, 9223372036854776832, 1075 + f64::INVALID_FP, ); bellerophon_test::(9223372036854777856, 0, false, 1, 1086); // Add a 0 but say we're truncated. bellerophon_test::(9007199254740992000, -3, true, 0, 1076); bellerophon_test::( 9007199254740993000, -3, true, 9223372036854776832, 1065 + f64::INVALID_FP, ); bellerophon_test::(9007199254740994000, -3, true, 1, 1076); } #[test] fn halfway_round_up_test() { // Halfway, round-up tests bellerophon_test::(9007199254740994, 0, false, 1, 1076); bellerophon_test::( 9007199254740995, 0, false, 9223372036854778880, 1065 + f64::INVALID_FP, ); bellerophon_test::(9007199254740996, 0, false, 2, 1076); bellerophon_test::(18014398509481988, 0, false, 1, 1077); bellerophon_test::( 18014398509481990, 0, false, 9223372036854778880, 1066 + f64::INVALID_FP, ); bellerophon_test::(18014398509481992, 0, false, 2, 1077); bellerophon_test::(9223372036854777856, 0, false, 1, 1086); bellerophon_test::( 9223372036854778880, 0, false, 9223372036854778880, 1075 + f64::INVALID_FP, ); bellerophon_test::(9223372036854779904, 0, false, 2, 1086); // Add a 0 but say we're truncated. bellerophon_test::(9007199254740994000, -3, true, 1, 1076); bellerophon_test::( 9007199254740994990, -3, true, 9223372036854778869, 1065 + f64::INVALID_FP, ); bellerophon_test::( 9007199254740995000, -3, true, 9223372036854778879, 1065 + f64::INVALID_FP, ); bellerophon_test::( 9007199254740995010, -3, true, 9223372036854778890, 1065 + f64::INVALID_FP, ); bellerophon_test::(9007199254740995050, -3, true, 2, 1076); bellerophon_test::(9007199254740996000, -3, true, 2, 1076); } #[test] fn extremes_test() { // Need to check we get proper results with rounding for near-infinity // and near-zero and/or denormal floats. bellerophon_test::(5, -324, false, 1, 0); bellerophon_test::(10, -324, false, 2, 0); // This is very close to 2.4703282292062327206e-342. bellerophon_test::( 2470328229206232720, -342, false, 18446744073709551608, -64 + f64::INVALID_FP, ); bellerophon_test::(2470328229206232721, -342, false, 9223372036854775808, -32831); bellerophon_test::(2470328229206232725, -342, false, 9223372036854775824, -32831); bellerophon_test::(2470328229206232726, -342, false, 1, 0); bellerophon_test::(2470328229206232730, -342, false, 1, 0); // Check very close to literal infinity. // 17.976931348623155 // 1.797693134862315508561243283845062402343434371574593359244049e+308 // 1.797693134862315708145274237317043567980705675258449965989175e+308 bellerophon_test::(17976931348623155, 292, false, 4503599627370494, 2046); bellerophon_test::(17976931348623156, 292, false, 4503599627370494, 2046); bellerophon_test::(1797693134862315605, 290, false, 4503599627370494, 2046); bellerophon_test::(1797693134862315607, 290, false, 4503599627370494, 2046); bellerophon_test::(1797693134862315608, 290, false, 18446744073709548540, -30733); bellerophon_test::(1797693134862315609, 290, false, 18446744073709548550, -30733); bellerophon_test::(179769313486231561, 291, false, 4503599627370495, 2046); bellerophon_test::(17976931348623157, 292, false, 4503599627370495, 2046); // Check existing issues and underflow. bellerophon_test::(2470328229206232726, -343, false, 0, 0); bellerophon_test::(2470328229206232726, -342, false, 1, 0); bellerophon_test::(1, -250, false, 1945308223406668, 192); bellerophon_test::(1, -150, false, 2867420733609077, 524); bellerophon_test::(1, -45, false, 1924152549665465, 873); bellerophon_test::(1, -40, false, 400386103400348, 890); bellerophon_test::(1, -20, false, 2142540351554083, 956); bellerophon_test::(1, 0, false, 0, 1023); bellerophon_test::(1, 20, false, 1599915997629504, 1089); bellerophon_test::(1, 40, false, 3768206498159781, 1155); bellerophon_test::(1, 150, false, 999684479948463, 1521); bellerophon_test::(1, 250, false, 1786584717939204, 1853); // Minimum positive normal float. bellerophon_test::(22250738585072014, -324, false, 0, 1); // Maximum positive subnormal float. bellerophon_test::(2225073858507201, -323, false, 4503599627370495, 0); // Next highest subnormal float. bellerophon_test::(22250738585072004, -324, false, 4503599627370494, 0); bellerophon_test::(22250738585072006, -324, false, 4503599627370494, 0); bellerophon_test::(22250738585072007, -324, false, 4503599627370495, 0); bellerophon_test::(222507385850720062, -325, false, 4503599627370494, 0); bellerophon_test::(222507385850720063, -325, false, 4503599627370494, 0); bellerophon_test::(222507385850720064, -325, false, 4503599627370494, 0); bellerophon_test::(2225073858507200641, -326, false, 18446744073709545462, -32779); bellerophon_test::(2225073858507200642, -326, false, 18446744073709545472, -32779); bellerophon_test::(222507385850720065, -325, false, 4503599627370495, 0); } #[test] fn compute_float_f32_test() { // These test near-halfway cases for single-precision floats. assert_eq!(compute_float32(0, 16777216), (151, 0)); assert_eq!(compute_float32(0, 16777217), (111 + f32::INVALID_FP, 9223372586610589696)); assert_eq!(compute_float32(0, 16777218), (151, 1)); assert_eq!(compute_float32(0, 16777219), (111 + f32::INVALID_FP, 9223373686122217472)); assert_eq!(compute_float32(0, 16777220), (151, 2)); // These are examples of the above tests, with // digits from the exponent shifted to the mantissa. assert_eq!(compute_float32(-10, 167772160000000000), (151, 0)); assert_eq!( compute_float32(-10, 167772170000000000), (111 + f32::INVALID_FP, 9223372586610589696) ); assert_eq!(compute_float32(-10, 167772180000000000), (151, 1)); // Let's check the lines to see if anything is different in table... assert_eq!( compute_float32(-10, 167772190000000000), (111 + f32::INVALID_FP, 9223373686122217472) ); assert_eq!(compute_float32(-10, 167772200000000000), (151, 2)); } #[test] fn compute_float_f64_test() { // These test near-halfway cases for double-precision floats. assert_eq!(compute_float64(0, 9007199254740992), (1076, 0)); assert_eq!(compute_float64(0, 9007199254740993), (1065 + f64::INVALID_FP, 9223372036854776832)); assert_eq!(compute_float64(0, 9007199254740994), (1076, 1)); assert_eq!(compute_float64(0, 9007199254740995), (1065 + f64::INVALID_FP, 9223372036854778880)); assert_eq!(compute_float64(0, 9007199254740996), (1076, 2)); assert_eq!(compute_float64(0, 18014398509481984), (1077, 0)); assert_eq!( compute_float64(0, 18014398509481986), (1066 + f64::INVALID_FP, 9223372036854776832) ); assert_eq!(compute_float64(0, 18014398509481988), (1077, 1)); assert_eq!( compute_float64(0, 18014398509481990), (1066 + f64::INVALID_FP, 9223372036854778880) ); assert_eq!(compute_float64(0, 18014398509481992), (1077, 2)); // These are examples of the above tests, with // digits from the exponent shifted to the mantissa. assert_eq!(compute_float64(-3, 9007199254740992000), (1076, 0)); assert_eq!( compute_float64(-3, 9007199254740993000), (1065 + f64::INVALID_FP, 9223372036854776832) ); assert_eq!(compute_float64(-3, 9007199254740994000), (1076, 1)); assert_eq!( compute_float64(-3, 9007199254740995000), (1065 + f64::INVALID_FP, 9223372036854778879) ); assert_eq!(compute_float64(-3, 9007199254740996000), (1076, 2)); }