uae_cpu/fpu/fpu_ieee.h

/*
 *  fpu/fpu_uae.h - Extra Definitions for the old UAE FPU core
 *
 *  Basilisk II (C) 1997-2008 Christian Bauer
 *
 *  MC68881/68040 fpu emulation
 *  
 *  Original UAE FPU, copyright 1996 Herman ten Brugge
 *  Rewrite for x86, copyright 1999-2000 Lauri Pesonen
 *  New framework, copyright 2000 Gwenole Beauchesne
 *  Adapted for JIT compilation (c) Bernd Meyer, 2000
 *  
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef FPU_IEEE_H
#define FPU_IEEE_H

/* NOTE: this file shall be included from fpu/fpu_uae.cpp */
#undef  PUBLIC
#define PUBLIC  extern

#undef  PRIVATE
#define PRIVATE static

#undef  FFPU
#define FFPU    /**/

#undef  FPU
#define FPU             fpu.

// Lauri-- full words to avoid partial register stalls.
struct double_flags {
        uae_u32         in_range;
        uae_u32         zero;
        uae_u32         infinity;
        uae_u32         nan;
        uae_u32         negative;
};
PRIVATE double_flags fl_source;
PRIVATE double_flags fl_dest;
PRIVATE inline void FFPU get_dest_flags(fpu_register const & r);
PRIVATE inline void FFPU get_source_flags(fpu_register const & r);

PRIVATE inline void FFPU make_nan(fpu_register & r);
PRIVATE inline void FFPU make_zero_positive(fpu_register & r);
PRIVATE inline void FFPU make_zero_negative(fpu_register & r);
PRIVATE inline void FFPU make_inf_positive(fpu_register & r);
PRIVATE inline void FFPU make_inf_negative(fpu_register & r);

PRIVATE inline void FFPU fast_scale(fpu_register & r, int add);
PRIVATE inline fpu_register FFPU fast_fgetexp(fpu_register const & r);

// May be optimized for particular processors
#ifndef FPU_USE_NATIVE_FLAGS
PRIVATE inline void FFPU make_fpsr(fpu_register const & r);
#endif

// Normalize to range 1..2
PRIVATE inline void FFPU fast_remove_exponent(fpu_register & r);

// The sign of the quotient is the exclusive-OR of the sign bits
// of the source and destination operands.
PRIVATE inline uae_u32 FFPU get_quotient_sign(
        fpu_register const & ra, fpu_register const & rb
);

// Quotient Byte is loaded with the sign and least significant
// seven bits of the quotient.
PRIVATE inline void FFPU make_quotient(
        fpu_register const & quotient, uae_u32 sign
);

// to_single
PRIVATE inline fpu_register FFPU make_single(
        uae_u32 value
);

// from_single
PRIVATE inline uae_u32 FFPU extract_single(
        fpu_register const & src
);

// to_exten
PRIVATE inline fpu_register FFPU make_extended(
        uae_u32 wrd1, uae_u32 wrd2, uae_u32 wrd3
);

/*
        Would be so much easier with full size floats :(
        ... this is so vague.
*/
// to_exten_no_normalize
PRIVATE inline void FFPU make_extended_no_normalize(
        uae_u32 wrd1, uae_u32 wrd2, uae_u32 wrd3, fpu_register & result
);

// from_exten
PRIVATE inline void FFPU extract_extended(fpu_register const & src,
        uae_u32 * wrd1, uae_u32 * wrd2, uae_u32 * wrd3
);

// to_double
PRIVATE inline fpu_register FFPU make_double(
        uae_u32 wrd1, uae_u32 wrd2
);

// from_double
PRIVATE inline void FFPU extract_double(fpu_register const & src, 
        uae_u32 * wrd1, uae_u32 * wrd2
);

PRIVATE inline fpu_register FFPU make_packed(
        uae_u32 wrd1, uae_u32 wrd2, uae_u32 wrd3
);

PRIVATE inline void FFPU extract_packed(
        fpu_register const & src, uae_u32 * wrd1, uae_u32 * wrd2, uae_u32 * wrd3
);

PRIVATE inline int FFPU get_fp_value(
        uae_u32 opcode, uae_u16 extra, fpu_register & src
);

PRIVATE inline int FFPU put_fp_value(
        uae_u32 opcode, uae_u16 extra, fpu_register const & value
);

PRIVATE inline int FFPU get_fp_ad(
        uae_u32 opcode, uae_u32 * ad
);

PRIVATE inline int FFPU fpp_cond(
        int condition
);

#endif /* FPU_IEEE_H */
Revision:	1.4
Committed:	2008-01-01T09:40:36Z (16 years, 10 months ago) by gbeauche
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.3:	+1 -1 lines
Log Message:	Happy New Year!
#	User	Rev	Content
1	gbeauche	1.1	/*
2			* fpu/fpu_uae.h - Extra Definitions for the old UAE FPU core
3			*
4	gbeauche	1.4	* Basilisk II (C) 1997-2008 Christian Bauer
5	gbeauche	1.1	*
6			* MC68881/68040 fpu emulation
7			*
8			* Original UAE FPU, copyright 1996 Herman ten Brugge
9			* Rewrite for x86, copyright 1999-2000 Lauri Pesonen
10			* New framework, copyright 2000 Gwenole Beauchesne
11			* Adapted for JIT compilation (c) Bernd Meyer, 2000
12			*
13			* This program is free software; you can redistribute it and/or modify
14			* it under the terms of the GNU General Public License as published by
15			* the Free Software Foundation; either version 2 of the License, or
16			* (at your option) any later version.
17			*
18			* This program is distributed in the hope that it will be useful,
19			* but WITHOUT ANY WARRANTY; without even the implied warranty of
20			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21			* GNU General Public License for more details.
22			*
23			* You should have received a copy of the GNU General Public License
24			* along with this program; if not, write to the Free Software
25			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26			*/
27
28			#ifndef FPU_IEEE_H
29			#define FPU_IEEE_H
30
31			/* NOTE: this file shall be included from fpu/fpu_uae.cpp */
32			#undef PUBLIC
33			#define PUBLIC extern
34
35			#undef PRIVATE
36			#define PRIVATE static
37
38			#undef FFPU
39			#define FFPU /**/
40
41			#undef FPU
42			#define FPU fpu.
43
44			// Lauri-- full words to avoid partial register stalls.
45			struct double_flags {
46			uae_u32 in_range;
47			uae_u32 zero;
48			uae_u32 infinity;
49			uae_u32 nan;
50			uae_u32 negative;
51			};
52			PRIVATE double_flags fl_source;
53			PRIVATE double_flags fl_dest;
54			PRIVATE inline void FFPU get_dest_flags(fpu_register const & r);
55			PRIVATE inline void FFPU get_source_flags(fpu_register const & r);
56
57			PRIVATE inline void FFPU make_nan(fpu_register & r);
58			PRIVATE inline void FFPU make_zero_positive(fpu_register & r);
59			PRIVATE inline void FFPU make_zero_negative(fpu_register & r);
60			PRIVATE inline void FFPU make_inf_positive(fpu_register & r);
61			PRIVATE inline void FFPU make_inf_negative(fpu_register & r);
62
63			PRIVATE inline void FFPU fast_scale(fpu_register & r, int add);
64			PRIVATE inline fpu_register FFPU fast_fgetexp(fpu_register const & r);
65
66			// May be optimized for particular processors
67			#ifndef FPU_USE_NATIVE_FLAGS
68			PRIVATE inline void FFPU make_fpsr(fpu_register const & r);
69			#endif
70
71			// Normalize to range 1..2
72			PRIVATE inline void FFPU fast_remove_exponent(fpu_register & r);
73
74			// The sign of the quotient is the exclusive-OR of the sign bits
75			// of the source and destination operands.
76			PRIVATE inline uae_u32 FFPU get_quotient_sign(
77			fpu_register const & ra, fpu_register const & rb
78			);
79
80			// Quotient Byte is loaded with the sign and least significant
81			// seven bits of the quotient.
82			PRIVATE inline void FFPU make_quotient(
83			fpu_register const & quotient, uae_u32 sign
84			);
85
86			// to_single
87			PRIVATE inline fpu_register FFPU make_single(
88			uae_u32 value
89			);
90
91			// from_single
92			PRIVATE inline uae_u32 FFPU extract_single(
93			fpu_register const & src
94			);
95
96			// to_exten
97			PRIVATE inline fpu_register FFPU make_extended(
98			uae_u32 wrd1, uae_u32 wrd2, uae_u32 wrd3
99			);
100
101			/*
102			Would be so much easier with full size floats :(
103			... this is so vague.
104			*/
105			// to_exten_no_normalize
106			PRIVATE inline void FFPU make_extended_no_normalize(
107			uae_u32 wrd1, uae_u32 wrd2, uae_u32 wrd3, fpu_register & result
108			);
109
110			// from_exten
111			PRIVATE inline void FFPU extract_extended(fpu_register const & src,
112			uae_u32 * wrd1, uae_u32 * wrd2, uae_u32 * wrd3
113			);
114
115			// to_double
116			PRIVATE inline fpu_register FFPU make_double(
117			uae_u32 wrd1, uae_u32 wrd2
118			);
119
120			// from_double
121			PRIVATE inline void FFPU extract_double(fpu_register const & src,
122			uae_u32 * wrd1, uae_u32 * wrd2
123			);
124
125			PRIVATE inline fpu_register FFPU make_packed(
126			uae_u32 wrd1, uae_u32 wrd2, uae_u32 wrd3
127			);
128
129			PRIVATE inline void FFPU extract_packed(
130			fpu_register const & src, uae_u32 * wrd1, uae_u32 * wrd2, uae_u32 * wrd3
131			);
132
133			PRIVATE inline int FFPU get_fp_value(
134			uae_u32 opcode, uae_u16 extra, fpu_register & src
135			);
136
137			PRIVATE inline int FFPU put_fp_value(
138			uae_u32 opcode, uae_u16 extra, fpu_register const & value
139			);
140
141			PRIVATE inline int FFPU get_fp_ad(
142			uae_u32 opcode, uae_u32 * ad
143			);
144
145			PRIVATE inline int FFPU fpp_cond(
146			int condition
147			);
148
149			#endif /* FPU_IEEE_H */