amath  1.8.5
Simple command line calculator
fabs.c
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1 /*-
2  * Copyright (c) 2014-2018 Carsten Sonne Larsen <cs@innolan.net>
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40 
41 /**
42  * @file fabs.c
43  * @brief Absolute value function
44  */
45 
46 #include "prim.h"
47 
48 /**
49  * @brief Returns the absolute value of x
50  */
51 double fabs(double x)
52 {
53  uint32_t hx;
54  GET_HIGH_WORD(hx, x);
55  SET_HIGH_WORD(x, hx & 0x7fffffff);
56  return x;
57 }
#define GET_HIGH_WORD(i, d)
Get the more significant 32 bit int from a double.
Definition: prim.h:167
double fabs(double x)
Returns the absolute value of x.
Definition: fabs.c:51
#define SET_HIGH_WORD(d, v)
Set the more significant 32 bits of a double from an int.
Definition: prim.h:198