| // Copyright (C) 2020 Kevin Gibbons. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| esid: sec-date.utc |
| description: arithmetic in Date is done on floating-point numbers |
| info: | |
| [...] |
| Return TimeClip(MakeDate(MakeDay(yr, m, dt), MakeTime(h, min, s, milli))). |
| |
| #sec-maketime |
| |
| Let _t_ be ((_h_ `*` msPerHour `+` _m_ `*` msPerMinute) `+` _s_ `*` msPerSecond) `+` _milli_, performing the arithmetic according to IEEE 754-2019 rules (that is, as if using the ECMAScript operators `*` and `+`). |
| |
| #sec-makedate |
| |
| Return day × msPerDay + time. |
| ---*/ |
| |
| assert.sameValue(Date.UTC(1970, 0, 1, 80063993375, 29, 1, -288230376151711740), 29312, 'order of operations / precision in MakeTime'); |
| assert.sameValue(Date.UTC(1970, 0, 213503982336, 0, 0, 0, -18446744073709552000), 34447360, 'precision in MakeDate'); |
