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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgo/] [go/] [math/] [floor.go] - Blame information for rev 747

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1 747 jeremybenn 
// Copyright 2009-2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package math
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// Floor returns the greatest integer value less than or equal to x.
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//
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// Special cases are:
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//      Floor(±0) = ±0
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//      Floor(±Inf) = ±Inf
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//      Floor(NaN) = NaN
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//extern floor
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func libc_floor(float64) float64
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func Floor(x float64) float64 {
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        return libc_floor(x)
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}
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func floor(x float64) float64 {
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        if x == 0 || IsNaN(x) || IsInf(x, 0) {
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                return x
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        }
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        if x < 0 {
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                d, fract := Modf(-x)
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                if fract != 0.0 {
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                        d = d + 1
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                }
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                return -d
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        }
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        d, _ := Modf(x)
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        return d
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}
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// Ceil returns the least integer value greater than or equal to x.
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//
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// Special cases are:
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//      Ceil(±0) = ±0
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//      Ceil(±Inf) = ±Inf
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//      Ceil(NaN) = NaN
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//extern ceil
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func libc_ceil(float64) float64
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func Ceil(x float64) float64 {
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        return libc_ceil(x)
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}
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func ceil(x float64) float64 {
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        return -Floor(-x)
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}
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// Trunc returns the integer value of x.
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//
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// Special cases are:
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//      Trunc(±0) = ±0
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//      Trunc(±Inf) = ±Inf
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//      Trunc(NaN) = NaN
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func Trunc(x float64) float64 {
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        return trunc(x)
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}
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func trunc(x float64) float64 {
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        if x == 0 || IsNaN(x) || IsInf(x, 0) {
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                return x
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        }
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        d, _ := Modf(x)
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        return d
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}

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