diff options
Diffstat (limited to 'misc/cgo/gmp/pi.go')
-rw-r--r-- | misc/cgo/gmp/pi.go | 62 |
1 files changed, 31 insertions, 31 deletions
diff --git a/misc/cgo/gmp/pi.go b/misc/cgo/gmp/pi.go index 61b88a417..45f61abbd 100644 --- a/misc/cgo/gmp/pi.go +++ b/misc/cgo/gmp/pi.go @@ -38,67 +38,67 @@ POSSIBILITY OF SUCH DAMAGE. package main import ( - big "gmp"; - "fmt"; - "runtime"; + big "gmp" + "fmt" + "runtime" ) var ( - tmp1 = big.NewInt(0); - tmp2 = big.NewInt(0); - numer = big.NewInt(1); - accum = big.NewInt(0); - denom = big.NewInt(1); - ten = big.NewInt(10); + tmp1 = big.NewInt(0) + tmp2 = big.NewInt(0) + numer = big.NewInt(1) + accum = big.NewInt(0) + denom = big.NewInt(1) + ten = big.NewInt(10) ) func extractDigit() int64 { if big.CmpInt(numer, accum) > 0 { return -1 } - tmp1.Lsh(numer, 1).Add(tmp1, numer).Add(tmp1, accum); - big.DivModInt(tmp1, tmp2, tmp1, denom); - tmp2.Add(tmp2, numer); + tmp1.Lsh(numer, 1).Add(tmp1, numer).Add(tmp1, accum) + big.DivModInt(tmp1, tmp2, tmp1, denom) + tmp2.Add(tmp2, numer) if big.CmpInt(tmp2, denom) >= 0 { return -1 } - return tmp1.Int64(); + return tmp1.Int64() } func nextTerm(k int64) { - y2 := k*2 + 1; - accum.Add(accum, tmp1.Lsh(numer, 1)); - accum.Mul(accum, tmp1.SetInt64(y2)); - numer.Mul(numer, tmp1.SetInt64(k)); - denom.Mul(denom, tmp1.SetInt64(y2)); + y2 := k*2 + 1 + accum.Add(accum, tmp1.Lsh(numer, 1)) + accum.Mul(accum, tmp1.SetInt64(y2)) + numer.Mul(numer, tmp1.SetInt64(k)) + denom.Mul(denom, tmp1.SetInt64(y2)) } func eliminateDigit(d int64) { - accum.Sub(accum, tmp1.Mul(denom, tmp1.SetInt64(d))); - accum.Mul(accum, ten); - numer.Mul(numer, ten); + accum.Sub(accum, tmp1.Mul(denom, tmp1.SetInt64(d))) + accum.Mul(accum, ten) + numer.Mul(numer, ten) } func main() { - i := 0; - k := int64(0); + i := 0 + k := int64(0) for { - d := int64(-1); + d := int64(-1) for d < 0 { - k++; - nextTerm(k); - d = extractDigit(); + k++ + nextTerm(k) + d = extractDigit() } - eliminateDigit(d); - fmt.Printf("%c", d+'0'); + eliminateDigit(d) + fmt.Printf("%c", d+'0') if i++; i%50 == 0 { - fmt.Printf("\n"); + fmt.Printf("\n") if i >= 1000 { break } } } - fmt.Printf("\n%d calls; bit sizes: %d %d %d\n", runtime.Cgocalls(), numer.Len(), accum.Len(), denom.Len()); + fmt.Printf("\n%d calls; bit sizes: %d %d %d\n", runtime.Cgocalls(), numer.Len(), accum.Len(), denom.Len()) } |