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| author | Tobias Klauser <tklauser@distanz.ch> | 2017-11-02 11:19:23 +0100 |
|---|---|---|
| committer | Robert Griesemer <gri@golang.org> | 2017-11-03 20:12:07 +0000 |
| commit | 89bcbf40b86ebad81d5cf34f6457f11a6f23b808 (patch) | |
| tree | 3cc56b5df65a744c66009891634bdcb99f895604 /src/math/bits/make_examples.go | |
| parent | 483e298daad38f39515ba20c0fcedc20b5475ae8 (diff) | |
| download | go-89bcbf40b86ebad81d5cf34f6457f11a6f23b808.tar.xz | |
math/bits: add examples for right rotation
Right rotation is achieved using negative k in RotateLeft*(x, k). Add
examples demonstrating that functionality.
Change-Id: I15dab159accd2937cb18d3fa8ca32da8501567d3
Reviewed-on: https://go-review.googlesource.com/75371
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Diffstat (limited to 'src/math/bits/make_examples.go')
| -rw-r--r-- | src/math/bits/make_examples.go | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/math/bits/make_examples.go b/src/math/bits/make_examples.go index ac537d5778..cd81cd6c4d 100644 --- a/src/math/bits/make_examples.go +++ b/src/math/bits/make_examples.go @@ -37,6 +37,7 @@ func main() { name string in int out [4]interface{} + out2 [4]interface{} }{ { name: "LeadingZeros", @@ -57,6 +58,7 @@ func main() { name: "RotateLeft", in: 15, out: [4]interface{}{bits.RotateLeft8(15, 2), bits.RotateLeft16(15, 2), bits.RotateLeft32(15, 2), bits.RotateLeft64(15, 2)}, + out2: [4]interface{}{bits.RotateLeft8(15, -2), bits.RotateLeft16(15, -2), bits.RotateLeft32(15, -2), bits.RotateLeft64(15, -2)}, }, { name: "Reverse", @@ -85,12 +87,16 @@ func main() { fmt.Fprintf(w, "\tfmt.Printf(\"%%0%db\\n\", %d)\n", size, e.in) if e.name == "RotateLeft" { fmt.Fprintf(w, "\tfmt.Printf(\"%%0%db\\n\", bits.%s(%d, 2))\n", size, f, e.in) + fmt.Fprintf(w, "\tfmt.Printf(\"%%0%db\\n\", bits.%s(%d, -2))\n", size, f, e.in) } else { fmt.Fprintf(w, "\tfmt.Printf(\"%%0%db\\n\", bits.%s(%d))\n", size, f, e.in) } fmt.Fprintf(w, "\t// Output:\n") fmt.Fprintf(w, "\t// %0*b\n", size, e.in) fmt.Fprintf(w, "\t// %0*b\n", size, e.out[i]) + if e.name == "RotateLeft" && e.out2[i] != nil { + fmt.Fprintf(w, "\t// %0*b\n", size, e.out2[i]) + } default: fmt.Fprintf(w, "\tfmt.Printf(\"%s(%%0%db) = %%d\\n\", %d, bits.%s(%d))\n", f, size, e.in, f, e.in) fmt.Fprintf(w, "\t// Output:\n") |