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floatingpoint.h (326) floatingpoint.h (338)
1/*-
2 * Copyright (c) 1993 Andrew Moore, Talke Studio
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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50#define fnstenv(addr) __asm("fnstenv %0" : "=m" (*addr) : "0" (*addr))
51#define fldenv(addr) __asm("fldenv %0" : : "m" (*addr))
52
53#ifdef __i386__
54
55/*
56 * return the contents of a FP register
57 */
1/*-
2 * Copyright (c) 1993 Andrew Moore, Talke Studio
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

--- 41 unchanged lines hidden (view full) ---

50#define fnstenv(addr) __asm("fnstenv %0" : "=m" (*addr) : "0" (*addr))
51#define fldenv(addr) __asm("fldenv %0" : : "m" (*addr))
52
53#ifdef __i386__
54
55/*
56 * return the contents of a FP register
57 */
58static __inline__
59__fpgetreg(reg)
58static __inline__ int
59__fpgetreg(int _reg)
60{
60{
61 unsigned short mem;
61 unsigned short _mem;
62
62
63 switch(reg) {
63 switch(_reg) {
64 default:
64 default:
65 fnstcw(&mem);
65 fnstcw(&_mem);
66 break;
67 case FP_STKY_REG:
66 break;
67 case FP_STKY_REG:
68 fnstsw(&mem);
68 fnstsw(&_mem);
69 break;
70 }
69 break;
70 }
71 return mem;
71 return _mem;
72}
73
74/*
75 * set a FP mode; return previous mode
76 */
72}
73
74/*
75 * set a FP mode; return previous mode
76 */
77static __inline__
78__fpsetreg(m, reg, fld, off)
77static __inline__ int
78__fpsetreg(int _m, int _reg, int _fld, int _off)
79{
79{
80 unsigned env[7];
81 unsigned p;
80 unsigned _env[7];
81 unsigned _p;
82
82
83 fnstenv(env);
84 p = (env[reg] & fld) >> off;
85 env[reg] = (env[reg] & ~fld) | (m << off & fld);
86 fldenv(env);
87 return p;
83 fnstenv(_env);
84 _p = (_env[_reg] & _fld) >> _off;
85 _env[_reg] = (_env[_reg] & ~_fld) | (_m << _off & _fld);
86 fldenv(_env);
87 return _p;
88}
89
90#endif /* __i386__ */
91
92#endif /* __GNUC__ */
93
94/*
95 * SysV/386 FP control interface

--- 12 unchanged lines hidden --- 		88}
89
90#endif /* __i386__ */
91
92#endif /* __GNUC__ */
93
94/*
95 * SysV/386 FP control interface

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