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8<title>fx64 Type Macros</title>
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14<h1 align="left">fx64 Type Macros <img src="../image/NTR.gif"align="middle"><img src="../image/TWL.gif" align="middle"></h1>
15<h2>Description</h2>
16<TABLE border="0" width="100%">
17  <TBODY>
18    <TR>
19      <TD width="154">FX64_SHIFT</TD>
20      <TD width="438">Defines the shift number (12) for <CODE>fx64</CODE> types.</TD>
21    </TR>
22    <TR>
23      <TD width="154">FX64_INT_SIZE</TD>
24      <TD width="438">Defines the bit width of the integer portion (51) for <CODE>fx64</CODE> types.</TD>
25    </TR>
26    <TR>
27      <TD width="154">FX64_DEC_SIZE</TD>
28      <TD width="438">Defines the bit width for the decimal portion (12) for <CODE>fx64</CODE> types.</TD>
29    </TR>
30    <TR>
31      <TD width="154">FX64_INT_MASK</TD>
32      <TD width="438">Defines the mask for the integer portion of <CODE>fx64</CODE> types.</TD>
33    </TR>
34    <TR>
35      <TD width="154">FX64_DEC_MASK</TD>
36      <TD width="438">Defines the mask (<CODE>0x0fff</CODE>) for the decimal portion of <CODE>fx64</CODE> types.</TD>
37    </TR>
38    <TR>
39      <TD width="154">FX64_SIGN_MASK</TD>
40      <TD width="438">Defines the mask for the sign portion of <CODE>fx64</CODE> types.</TD>
41    </TR>
42    <TR>
43      <TD width="154">FX64_MAX</TD>
44      <TD width="438">Defines the maximum value that can be obtained with <CODE>fx64</CODE> types.</TD>
45    </TR>
46    <TR>
47      <TD width="154">FX64_MIN</TD>
48      <TD width="438">Defines the minimum value that can be obtained with <CODE>fx64</CODE> types.</TD>
49    </TR>
50  </TBODY>
51</TABLE>
52<H2>Macro Definitions</H2>
53<PRE>#define FX64_SHIFT          12
54#define FX64_INT_SIZE       51
55#define FX64_DEC_SIZE       12
56
57#define FX64_INT_MASK       ((fx64)0x7ffffffffffff000)
58#define FX64_DEC_MASK       ((fx64)0x0000000000000fff)
59#define FX64_SIGN_MASK      ((fx64)0x8000000000000000)
60
61#define FX64_MAX            ((fx64)0x7fffffffffffffff)
62#define FX64_MIN            ((fx64)0x8000000000000000)
63#define FX_FX64_TO_F32(x)   ((f32)((x) / (f32)(1 &lt;&lt; FX64_SHIFT)))
64#define FX_F32_TO_FX64(x)   ((fx64)(((x) &gt; 0) ? \
65                                    ((x) * (1 &lt;&lt; FX32_SHIFT) + 0.5f ) : \
66                                    ((x) * (1 &lt;&lt; FX32_SHIFT) - 0.5f )))
67
68#define FX64_CONST(x)       FX_F32_TO_FX64(x)
69</CODE></PRE>
70<H2>Revision History</H2>
71<P>2004/02/25 Initial version.</P>
72<hr><p>CONFIDENTIAL</p></body>
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