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38 lines
938 B
38 lines
938 B
/************************************************************************ |
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* lib/math/lib_roundf.c |
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* |
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* This file is a part of NuttX: |
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* |
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* Copyright (C) 2012 Gregory Nutt. All rights reserved. |
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* (C) 2012 Petteri Aimonen <jpa@nx.mail.kapsi.fi> |
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* |
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************************************************************************/ |
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/************************************************************************ |
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* Included Files |
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************************************************************************/ |
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#include <nuttx/config.h> |
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#include <nuttx/compiler.h> |
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#include <math.h> |
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/************************************************************************ |
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* Public Functions |
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************************************************************************/ |
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float roundf(float x) |
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{ |
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float f = modff(x, &x); |
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if (x <= 0.0f && f <= -0.5f) |
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{ |
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x -= 1.0f; |
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} |
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if (x >= 0.0f && f >= 0.5f) |
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{ |
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x += 1.0f; |
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} |
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return x; |
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}
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