go/test/strength.go
Ainar Garipov 0efbd10157 all: fix typos
Use the following (suboptimal) script to obtain a list of possible
typos:

  #!/usr/bin/env sh

  set -x

  git ls-files |\
    grep -e '\.\(c\|cc\|go\)$' |\
    xargs -n 1\
    awk\
    '/\/\// { gsub(/.*\/\//, ""); print; } /\/\*/, /\*\// { gsub(/.*\/\*/, ""); gsub(/\*\/.*/, ""); }' |\
    hunspell -d en_US -l |\
    grep '^[[:upper:]]\{0,1\}[[:lower:]]\{1,\}$' |\
    grep -v -e '^.\{1,4\}$' -e '^.\{16,\}$' |\
    sort -f |\
    uniq -c |\
    awk '$1 == 1 { print $2; }'

Then, go through the results manually and fix the most obvious typos in
the non-vendored code.

Change-Id: I3cb5830a176850e1a0584b8a40b47bde7b260eae
Reviewed-on: https://go-review.googlesource.com/c/go/+/193848
Reviewed-by: Robert Griesemer <gri@golang.org>
2019-09-08 17:28:20 +00:00

45 lines
1 KiB
Go

// runoutput
// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Generate test of strength reduction for multiplications
// with constants. Especially useful for amd64/386.
package main
import "fmt"
func testMul(fact, bits int) string {
n := fmt.Sprintf("testMul_%d_%d", fact, bits)
fmt.Printf("func %s(s int%d) {\n", n, bits)
want := 0
for i := 0; i < 200; i++ {
fmt.Printf(` if want, got := int%d(%d), s*%d; want != got {
failed = true
fmt.Printf("got %d * %%d == %%d, wanted %d\n", s, got)
}
`, bits, want, i, i, want)
want += fact
}
fmt.Printf("}\n")
return fmt.Sprintf("%s(%d)", n, fact)
}
func main() {
fmt.Printf("package main\n")
fmt.Printf("import \"fmt\"\n")
fmt.Printf("var failed = false\n")
f1 := testMul(17, 32)
f2 := testMul(131, 64)
fmt.Printf("func main() {\n")
fmt.Println(f1)
fmt.Println(f2)
fmt.Printf("if failed {\n panic(\"multiplication failed\")\n}\n")
fmt.Printf("}\n")
}