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/arch/ppc/math-emu/single.h

https://bitbucket.org/evzijst/gittest
C Header | 66 lines | 51 code | 10 blank | 5 comment | 5 complexity | 8eaa7b71a0bf885a5d719ffb4acb4fa6 MD5 | raw file
 1/*
 2 * Definitions for IEEE Single Precision
 3 */
 4
 5#if _FP_W_TYPE_SIZE < 32
 6#error "Here's a nickel kid.  Go buy yourself a real computer."
 7#endif
 8
 9#define _FP_FRACBITS_S		24
10#define _FP_FRACXBITS_S		(_FP_W_TYPE_SIZE - _FP_FRACBITS_S)
11#define _FP_WFRACBITS_S		(_FP_WORKBITS + _FP_FRACBITS_S)
12#define _FP_WFRACXBITS_S	(_FP_W_TYPE_SIZE - _FP_WFRACBITS_S)
13#define _FP_EXPBITS_S		8
14#define _FP_EXPBIAS_S		127
15#define _FP_EXPMAX_S		255
16#define _FP_QNANBIT_S		((_FP_W_TYPE)1 << (_FP_FRACBITS_S-2))
17#define _FP_IMPLBIT_S		((_FP_W_TYPE)1 << (_FP_FRACBITS_S-1))
18#define _FP_OVERFLOW_S		((_FP_W_TYPE)1 << (_FP_WFRACBITS_S))
19
20/* The implementation of _FP_MUL_MEAT_S and _FP_DIV_MEAT_S should be
21   chosen by the target machine.  */
22
23union _FP_UNION_S
24{
25  float flt;
26  struct {
27#if __BYTE_ORDER == __BIG_ENDIAN
28    unsigned sign : 1;
29    unsigned exp  : _FP_EXPBITS_S;
30    unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0);
31#else
32    unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0);
33    unsigned exp  : _FP_EXPBITS_S;
34    unsigned sign : 1;
35#endif
36  } bits __attribute__((packed));
37};
38
39#define FP_DECL_S(X)		_FP_DECL(1,X)
40#define FP_UNPACK_RAW_S(X,val)	_FP_UNPACK_RAW_1(S,X,val)
41#define FP_PACK_RAW_S(val,X)	_FP_PACK_RAW_1(S,val,X)
42
43#define FP_UNPACK_S(X,val)		\
44  do {					\
45    _FP_UNPACK_RAW_1(S,X,val);		\
46    _FP_UNPACK_CANONICAL(S,1,X);	\
47  } while (0)
48
49#define FP_PACK_S(val,X)		\
50  do {					\
51    _FP_PACK_CANONICAL(S,1,X);		\
52    _FP_PACK_RAW_1(S,val,X);		\
53  } while (0)
54
55#define FP_NEG_S(R,X)		_FP_NEG(S,1,R,X)
56#define FP_ADD_S(R,X,Y)		_FP_ADD(S,1,R,X,Y)
57#define FP_SUB_S(R,X,Y)		_FP_SUB(S,1,R,X,Y)
58#define FP_MUL_S(R,X,Y)		_FP_MUL(S,1,R,X,Y)
59#define FP_DIV_S(R,X,Y)		_FP_DIV(S,1,R,X,Y)
60#define FP_SQRT_S(R,X)		_FP_SQRT(S,1,R,X)
61
62#define FP_CMP_S(r,X,Y,un)	_FP_CMP(S,1,r,X,Y,un)
63#define FP_CMP_EQ_S(r,X,Y)	_FP_CMP_EQ(S,1,r,X,Y)
64
65#define FP_TO_INT_S(r,X,rsz,rsg)  _FP_TO_INT(S,1,r,X,rsz,rsg)
66#define FP_FROM_INT_S(X,r,rs,rt)  _FP_FROM_INT(S,1,X,r,rs,rt)