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| author | Meng Zhuo <mzh@golangcn.org> | 2024-07-24 14:49:18 +0800 |
|---|---|---|
| committer | Gopher Robot <gobot@golang.org> | 2024-09-04 13:36:10 +0000 |
| commit | 3473d2f8efcb448e5433931a31fb358304bb9b80 (patch) | |
| tree | b7bd23f7fcfc691fbc14dfe39abbcfd7062f069c /src | |
| parent | 700920bbb73b39af4794854e79b76dc9b66b19ca (diff) | |
| download | go-3473d2f8efcb448e5433931a31fb358304bb9b80.tar.xz | |
math: add large exact float rounding tests
This CL adds trunc,ceil,floor tests for large exact float.
Change-Id: Ib7ffec1d2d50d2ac955398a3dd0fd06d494fcf4f
Reviewed-on: https://go-review.googlesource.com/c/go/+/601095
Auto-Submit: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/math/all_test.go | 52 |
1 files changed, 47 insertions, 5 deletions
diff --git a/src/math/all_test.go b/src/math/all_test.go index af3c38c2a6..c253b7bc02 100644 --- a/src/math/all_test.go +++ b/src/math/all_test.go @@ -899,8 +899,17 @@ var vfceilSC = []float64{ 0, Inf(1), NaN(), + 1<<52 - 1, + 1<<52 - 0.5, // largest fractional float64 + 1 << 52, + -1 << 52, + -1<<52 + 0.5, // smallest fractional float64 + -1<<52 + 1, + 1 << 53, + -1 << 53, } -var ceilSC = []float64{ + +var ceilBaseSC = []float64{ Inf(-1), Copysign(0, -1), 0, @@ -908,6 +917,39 @@ var ceilSC = []float64{ NaN(), } +var ceilSC = append(ceilBaseSC, + 1<<52-1, + 1<<52, + 1<<52, + -1<<52, + -1<<52+1, + -1<<52+1, + 1<<53, + -1<<53, +) + +var floorSC = append(ceilBaseSC, + 1<<52-1, + 1<<52-1, + 1<<52, + -1<<52, + -1<<52, + -1<<52+1, + 1<<53, + -1<<53, +) + +var truncSC = append(ceilBaseSC, + 1<<52-1, + 1<<52-1, + 1<<52, + -1<<52, + -1<<52+1, + -1<<52+1, + 1<<53, + -1<<53, +) + var vfcopysignSC = []float64{ Inf(-1), Inf(1), @@ -2489,8 +2531,8 @@ func TestFloor(t *testing.T) { } } for i := 0; i < len(vfceilSC); i++ { - if f := Floor(vfceilSC[i]); !alike(ceilSC[i], f) { - t.Errorf("Floor(%g) = %g, want %g", vfceilSC[i], f, ceilSC[i]) + if f := Floor(vfceilSC[i]); !alike(floorSC[i], f) { + t.Errorf("Floor(%g) = %g, want %g", vfceilSC[i], f, floorSC[i]) } } } @@ -3034,8 +3076,8 @@ func TestTrunc(t *testing.T) { } } for i := 0; i < len(vfceilSC); i++ { - if f := Trunc(vfceilSC[i]); !alike(ceilSC[i], f) { - t.Errorf("Trunc(%g) = %g, want %g", vfceilSC[i], f, ceilSC[i]) + if f := Trunc(vfceilSC[i]); !alike(truncSC[i], f) { + t.Errorf("Trunc(%g) = %g, want %g", vfceilSC[i], f, truncSC[i]) } } } |