1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2002 by Thomas Moestl <tmm@FreeBSD.org>.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
23 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
25 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 * $FreeBSD: head/lib/libc/sparc64/fpu/fpu_reg.h 327232 2017-12-27 03:23:41Z eadler $
28 */
29
30 #ifndef _LIBC_SPARC64_FPU_FPU_REG_H_
31 #define _LIBC_SPARC64_FPU_FPU_REG_H_
32
33 #include <stdint.h>
34
35 /*
36 * These are not really of type char[]. They are arrays of functions defined
37 * in fpu_reg.S; each array member loads/stores a certain fpu register of the
38 * given size.
39 */
40 extern char __fpu_ld32[];
41 extern char __fpu_st32[];
42 extern char __fpu_ld64[];
43 extern char __fpu_st64[];
44
45 /* Size of the functions in the arrays. */
46 #define FPU_LD32_SZ 8
47 #define FPU_ST32_SZ 8
48 #define FPU_LD64_SZ 8
49 #define FPU_ST64_SZ 8
50
51 /* Typedefs for convenient casts in the functions below. */
52 typedef void (fp_ldst32_fn)(uint32_t *);
53 typedef void (fp_ldst64_fn)(uint64_t *);
54
55 /*
56 * These are the functions that are actually used in the fpu emulation code to
57 * access the fp registers. They are usually not used more than once, so
58 * caching needs not be done here.
59 */
60 static __inline uint32_t
__fpu_getreg(int r)61 __fpu_getreg(int r)
62 {
63 uint32_t rv;
64
65 ((fp_ldst32_fn *)&__fpu_st32[r * FPU_ST32_SZ])(&rv);
66 return (rv);
67 }
68
69 static __inline uint64_t
__fpu_getreg64(int r)70 __fpu_getreg64(int r)
71 {
72 uint64_t rv;
73
74 ((fp_ldst64_fn *)&__fpu_st64[(r >> 1) * FPU_ST64_SZ])(&rv);
75 return (rv);
76 }
77
78 static __inline void
__fpu_setreg(int r,uint32_t v)79 __fpu_setreg(int r, uint32_t v)
80 {
81
82 ((fp_ldst32_fn *)&__fpu_ld32[r * FPU_LD32_SZ])(&v);
83 }
84
85 static __inline void
__fpu_setreg64(int r,uint64_t v)86 __fpu_setreg64(int r, uint64_t v)
87 {
88
89 ((fp_ldst64_fn *)&__fpu_ld64[(r >> 1) * FPU_LD64_SZ])(&v);
90 }
91
92 #endif /* _LIBC_SPARC64_FPU_FPU_REG_H_ */
93