diff options
Diffstat (limited to 'vendor/github.com/vbauerster/mpb/internal/round.go')
| -rw-r--r-- | vendor/github.com/vbauerster/mpb/internal/round.go | 49 |
1 files changed, 0 insertions, 49 deletions
diff --git a/vendor/github.com/vbauerster/mpb/internal/round.go b/vendor/github.com/vbauerster/mpb/internal/round.go deleted file mode 100644 index c54a789d2..000000000 --- a/vendor/github.com/vbauerster/mpb/internal/round.go +++ /dev/null @@ -1,49 +0,0 @@ -package internal - -import "math" - -const ( - uvone = 0x3FF0000000000000 - mask = 0x7FF - shift = 64 - 11 - 1 - bias = 1023 - signMask = 1 << 63 - fracMask = 1<<shift - 1 -) - -// Round returns the nearest integer, rounding half away from zero. -// -// Special cases are: -// Round(±0) = ±0 -// Round(±Inf) = ±Inf -// Round(NaN) = NaN -func Round(x float64) float64 { - // Round is a faster implementation of: - // - // func Round(x float64) float64 { - // t := Trunc(x) - // if Abs(x-t) >= 0.5 { - // return t + Copysign(1, x) - // } - // return t - // } - bits := math.Float64bits(x) - e := uint(bits>>shift) & mask - if e < bias { - // Round abs(x) < 1 including denormals. - bits &= signMask // +-0 - if e == bias-1 { - bits |= uvone // +-1 - } - } else if e < bias+shift { - // Round any abs(x) >= 1 containing a fractional component [0,1). - // - // Numbers with larger exponents are returned unchanged since they - // must be either an integer, infinity, or NaN. - const half = 1 << (shift - 1) - e -= bias - bits += half >> e - bits &^= fracMask >> e - } - return math.Float64frombits(bits) -} |