/arch/ppc/math-emu/soft-fp.h

https://bitbucket.org/evzijst/gittest
C Header | 104 lines | 89 code | 14 blank | 1 comment | 15 complexity | 391d6340f97e63c962170d27e59ff5b5 MD5 | raw file
```  1#ifndef SOFT_FP_H
2#define SOFT_FP_H
3
4#include "sfp-machine.h"
5
6#define _FP_WORKBITS		3
7#define _FP_WORK_LSB		((_FP_W_TYPE)1 << 3)
8#define _FP_WORK_ROUND		((_FP_W_TYPE)1 << 2)
9#define _FP_WORK_GUARD		((_FP_W_TYPE)1 << 1)
10#define _FP_WORK_STICKY		((_FP_W_TYPE)1 << 0)
11
12#ifndef FP_RND_NEAREST
13# define FP_RND_NEAREST		0
14# define FP_RND_ZERO		1
15# define FP_RND_PINF		2
16# define FP_RND_MINF		3
17#ifndef FP_ROUNDMODE
18# define FP_ROUNDMODE		FP_RND_NEAREST
19#endif
20#endif
21
22#define _FP_ROUND_NEAREST(wc, X)			\
23({  int __ret = 0;					\
24    int __frac = _FP_FRAC_LOW_##wc(X) & 15;		\
25    if (__frac & 7) {					\
26      __ret = EFLAG_INEXACT;				\
27      if ((__frac & 7) != _FP_WORK_ROUND)		\
29      else if (__frac & _FP_WORK_LSB)			\
31    }							\
32    __ret;						\
33})
34
35#define _FP_ROUND_ZERO(wc, X)				\
36({  int __ret = 0;					\
37    if (_FP_FRAC_LOW_##wc(X) & 7)			\
38      __ret = EFLAG_INEXACT;				\
39    __ret;						\
40})
41
42#define _FP_ROUND_PINF(wc, X)				\
43({  int __ret = EFLAG_INEXACT;				\
44    if (!X##_s && (_FP_FRAC_LOW_##wc(X) & 7))		\
46    else __ret = 0;					\
47    __ret;						\
48})
49
50#define _FP_ROUND_MINF(wc, X)				\
51({  int __ret = EFLAG_INEXACT;				\
52    if (X##_s && (_FP_FRAC_LOW_##wc(X) & 7))		\
54    else __ret = 0;					\
55    __ret;						\
56})
57
58#define _FP_ROUND(wc, X)			\
59({	int __ret = 0;				\
60	switch (FP_ROUNDMODE)			\
61	{					\
62	  case FP_RND_NEAREST:			\
63	    __ret |= _FP_ROUND_NEAREST(wc,X);	\
64	    break;				\
65	  case FP_RND_ZERO:			\
66	    __ret |= _FP_ROUND_ZERO(wc,X);	\
67	    break;				\
68	  case FP_RND_PINF:			\
69	    __ret |= _FP_ROUND_PINF(wc,X);	\
70	    break;				\
71	  case FP_RND_MINF:			\
72	    __ret |= _FP_ROUND_MINF(wc,X);	\
73	    break;				\
74	};					\
75	__ret;					\
76})
77
78#define FP_CLS_NORMAL		0
79#define FP_CLS_ZERO		1
80#define FP_CLS_INF		2
81#define FP_CLS_NAN		3
82
83#define _FP_CLS_COMBINE(x,y)	(((x) << 2) | (y))
84
85#include "op-1.h"
86#include "op-2.h"
87#include "op-4.h"
88#include "op-common.h"
89
90/* Sigh.  Silly things longlong.h needs.  */
91#define UWtype		_FP_W_TYPE
92#define W_TYPE_SIZE	_FP_W_TYPE_SIZE
93
94typedef int SItype __attribute__((mode(SI)));
95typedef int DItype __attribute__((mode(DI)));
96typedef unsigned int USItype __attribute__((mode(SI)));
97typedef unsigned int UDItype __attribute__((mode(DI)));
98#if _FP_W_TYPE_SIZE == 32
99typedef unsigned int UHWtype __attribute__((mode(HI)));
100#elif _FP_W_TYPE_SIZE == 64
101typedef USItype UHWtype;
102#endif
103
104#endif
```