xref: /illumos-gate/usr/src/lib/libm/common/m9x/fma.h (revision 25c28e83beb90e7c80452a7c818c5e6f73a07dc8)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
24  */
25 /*
26  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
27  * Use is subject to license terms.
28  */
29 
30 #ifndef _FMA_H
31 #define	_FMA_H
32 
33 #ifdef __cplusplus
34 extern "C" {
35 #endif
36 
37 #ifdef __sparc
38 
39 /*
40  * Common definitions for fma routines (SPARC)
41  */
42 
43 /* fsr fields */
44 
45 /* current exception bits */
46 #define	FSR_NXC		0x1
47 #define	FSR_DZC		0x2
48 #define	FSR_UFC		0x4
49 #define	FSR_OFC		0x8
50 #define	FSR_NVC		0x10
51 #define	FSR_CEXC	0x1f	/* mask for all cexc bits */
52 
53 /* accrued exception bits */
54 #define	FSR_NXA		0x20
55 #define	FSR_DZA		0x40
56 #define	FSR_UFA		0x80
57 #define	FSR_OFA		0x100
58 #define	FSR_NVA		0x200
59 
60 /* trap enable bits */
61 #define	FSR_NXM		0x00800000
62 #define	FSR_DZM		0x01000000
63 #define	FSR_UFM		0x02000000
64 #define	FSR_OFM		0x04000000
65 #define	FSR_NVM		0x08000000
66 
67 /* rounding directions (right-adjusted) */
68 #define	FSR_RN		0
69 #define	FSR_RZ		1
70 #define	FSR_RP		2
71 #define	FSR_RM		3
72 
73 /* inline templates */
74 extern void __fenv_getfsr32(unsigned int *);
75 extern void __fenv_setfsr32(const unsigned int *);
76 
77 #endif /* __sparc */
78 
79 
80 #if defined(__x86)
81 
82 /*
83  * Common definitions for fma routines (x86)
84  */
85 
86 /* control and status word fields */
87 
88 /* exception flags */
89 #define	FSW_NV		0x1
90 #define	FSW_DN		0x2
91 #define	FSW_DZ		0x4
92 #define	FSW_OF		0x8
93 #define	FSW_UF		0x10
94 #define	FSW_NX		0x20
95 
96 /* exception masks */
97 #define	FCW_NVM		0x00010000
98 #define	FCW_DNM		0x00020000
99 #define	FCW_DZM		0x00040000
100 #define	FCW_OFM		0x00080000
101 #define	FCW_UFM		0x00100000
102 #define	FCW_NXM		0x00200000
103 #define FCW_ALLM	0x003f0000
104 
105 /* rounding directions */
106 #define	FCW_RN		0x00000000
107 #define	FCW_RM		0x04000000
108 #define	FCW_RP		0x08000000
109 #define	FCW_RZ		0x0c000000
110 
111 /* rounding precisions */
112 #define FCW_P24		0x00000000
113 #define FCW_P53		0x02000000
114 #define FCW_P64		0x03000000
115 
116 /* inline templates */
117 extern void __fenv_getcwsw(unsigned int *);
118 extern void __fenv_setcwsw(const unsigned int *);
119 
120 #endif /* __x86 */
121 
122 #ifdef __cplusplus
123 }
124 #endif
125 
126 #endif	/* _FMA_H */
127