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5
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1 /*
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2 * SpanDSP - a series of DSP components for telephony
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3 *
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4 * tgmath.h - a fudge for MSVC, which lacks this header
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5 *
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6 * Written by Steve Underwood <steveu@coppice.org>
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7 *
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8 * Copyright (C) 2006 Michael Jerris
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9 *
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10 *
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11 * This file is released in the public domain.
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12 *
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13 */
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14
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15 #if !defined(_TGMATH_H_)
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16 #define _TGMATH_H_
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17
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18 #include <math.h>
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19
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20 #if !defined(M_PI)
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21 /* C99 systems may not define M_PI */
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22 #define M_PI 3.14159265358979323846264338327
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23 #endif
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24
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25
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26 #ifdef __cplusplus
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27 extern "C" {
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28 #endif
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29
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30 /* A kindofa rint() for VC++ (only kindofa, because rint should be type generic,
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31 and this one is purely float to int */
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32 static inline long int lrintf(float a)
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33 {
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34 long int i;
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35
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36 __asm
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37 {
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38 fld a
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39 fistp i
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40 }
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41 return i;
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42 }
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43
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44 static inline long int lrint(double a)
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45 {
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46 long int i;
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47
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48 __asm
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49 {
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50 fld a
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51 fistp i
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52 }
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53 return i;
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54 }
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55
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56 #ifdef __cplusplus
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57 }
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58 #endif
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59
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60 #endif
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