FreeBSD/Linux Kernel Cross Reference
sys/arm/include/vfp.h
1 /*
2 * Copyright (c) 2012 Mark Tinguely
3 *
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 * $FreeBSD: releng/10.2/sys/arm/include/vfp.h 266341 2014-05-17 19:37:04Z ian $
27 */
28
29
30 #ifndef _MACHINE__VFP_H_
31 #define _MACHINE__VFP_H_
32
33 /* fpsid, fpscr, fpexc are defined in the newer gas */
34 #define VFPSID cr0
35 #define VFPSCR cr1
36 #define VMVFR1 cr6
37 #define VMVFR0 cr7
38 #define VFPEXC cr8
39 #define VFPINST cr9 /* vfp 1 and 2 except instruction */
40 #define VFPINST2 cr10 /* vfp 2? */
41
42 /* VFPSID */
43 #define VFPSID_IMPLEMENTOR_OFF 24
44 #define VFPSID_IMPLEMENTOR_MASK (0xff000000)
45 #define VFPSID_HARDSOFT_IMP (0x00800000)
46 #define VFPSID_SINGLE_PREC 20 /* version 1 and 2 */
47 #define VFPSID_SUBVERSION_OFF 16
48 #define VFPSID_SUBVERSION2_MASK (0x000f0000) /* version 1 and 2 */
49 #define VFPSID_SUBVERSION3_MASK (0x007f0000) /* version 3 */
50 #define VFP_ARCH1 0x0
51 #define VFP_ARCH2 0x1
52 #define VFP_ARCH3 0x2
53 #define VFPSID_PARTNUMBER_OFF 8
54 #define VFPSID_PARTNUMBER_MASK (0x0000ff00)
55 #define VFPSID_VARIANT_OFF 4
56 #define VFPSID_VARIANT_MASK (0x000000f0)
57 #define VFPSID_REVISION_MASK 0x0f
58
59 /* VFPSCR */
60 #define VFPSCR_CC_N (0x80000000) /* comparison less than */
61 #define VFPSCR_CC_Z (0x40000000) /* comparison equal */
62 #define VFPSCR_CC_C (0x20000000) /* comparison = > unordered */
63 #define VFPSCR_CC_V (0x10000000) /* comparison unordered */
64 #define VFPSCR_QC (0x08000000) /* saturation cululative */
65 #define VFPSCR_DN (0x02000000) /* default NaN enable */
66 #define VFPSCR_FZ (0x01000000) /* flush to zero enabled */
67
68 #define VFPSCR_RMODE_OFF 22 /* rounding mode offset */
69 #define VFPSCR_RMODE_MASK (0x00c00000) /* rounding mode mask */
70 #define VFPSCR_RMODE_RN (0x00000000) /* round nearest */
71 #define VFPSCR_RMODE_RPI (0x00400000) /* round to plus infinity */
72 #define VFPSCR_RMODE_RNI (0x00800000) /* round to neg infinity */
73 #define VFPSCR_RMODE_RM (0x00c00000) /* round to zero */
74
75 #define VFPSCR_STRIDE_OFF 20 /* vector stride -1 */
76 #define VFPSCR_STRIDE_MASK (0x00300000)
77 #define VFPSCR_LEN_OFF 16 /* vector length -1 */
78 #define VFPSCR_LEN_MASK (0x00070000)
79 #define VFPSCR_IDE (0x00008000) /* input subnormal exc enable */
80 #define VFPSCR_IXE (0x00001000) /* inexact exception enable */
81 #define VFPSCR_UFE (0x00000800) /* underflow exception enable */
82 #define VFPSCR_OFE (0x00000400) /* overflow exception enable */
83 #define VFPSCR_DNZ (0x00000200) /* div by zero exception en */
84 #define VFPSCR_IOE (0x00000100) /* invalid op exec enable */
85 #define VFPSCR_IDC (0x00000080) /* input subnormal cumul */
86 #define VFPSCR_IXC (0x00000010) /* Inexact cumulative flag */
87 #define VFPSCR_UFC (0x00000008) /* underflow cumulative flag */
88 #define VFPSCR_OFC (0x00000004) /* overflow cumulative flag */
89 #define VFPSCR_DZC (0x00000002) /* division by zero flag */
90 #define VFPSCR_IOC (0x00000001) /* invalid operation cumul */
91
92 /* VFPEXC */
93 #define VFPEXC_EX (0x80000000) /* exception v1 v2 */
94 #define VFPEXC_EN (0x40000000) /* vfp enable */
95 #define VFPEXC_FP2V (0x10000000) /* FPINST2 valid */
96 #define VFPEXC_INV (0x00000080) /* Input exception */
97 #define VFPEXC_UFC (0x00000008) /* Underflow exception */
98 #define VFPEXC_OFC (0x00000004) /* Overflow exception */
99 #define VFPEXC_IOC (0x00000001) /* Invlaid operation */
100
101 /* version 3 registers */
102 /* VMVFR0 */
103 #define VMVFR0_RM_OFF 28
104 #define VMVFR0_RM_MASK (0xf0000000) /* VFP rounding modes */
105
106 #define VMVFR0_SV_OFF 24
107 #define VMVFR0_SV_MASK (0x0f000000) /* VFP short vector supp */
108 #define VMVFR0_SR_OFF 20
109 #define VMVFR0_SR (0x00f00000) /* VFP hw sqrt supp */
110 #define VMVFR0_D_OFF 16
111 #define VMVFR0_D_MASK (0x000f0000) /* VFP divide supp */
112 #define VMVFR0_TE_OFF 12
113 #define VMVFR0_TE_MASK (0x0000f000) /* VFP trap exception supp */
114 #define VMVFR0_DP_OFF 8
115 #define VMVFR0_DP_MASK (0x00000f00) /* VFP double prec support */
116 #define VMVFR0_SP_OFF 4
117 #define VMVFR0_SP_MASK (0x000000f0) /* VFP single prec support */
118 #define VMVFR0_RB_MASK (0x0000000f) /* VFP 64 bit media support */
119
120 /* VMVFR1 */
121 #define VMVFR1_SP_OFF 16
122 #define VMVFR1_SP_MASK (0x000f0000) /* Neon single prec support */
123 #define VMVFR1_I_OFF 12
124 #define VMVFR1_I_MASK (0x0000f000) /* Neon integer support */
125 #define VMVFR1_LS_OFF 8
126 #define VMVFR1_LS_MASK (0x00000f00) /* Neon ld/st instr support */
127 #define VMVFR1_DN_OFF 4
128 #define VMVFR1_DN_MASK (0x000000f0) /* Neon prop NaN support */
129 #define VMVFR1_FZ_MASK (0x0000000f) /* Neon denormal arith supp */
130
131 #define COPROC10 (0x3 << 20)
132 #define COPROC11 (0x3 << 22)
133
134 #ifndef LOCORE
135 void vfp_init(void);
136 void vfp_store(struct vfp_state *, boolean_t);
137 void vfp_discard(struct thread *);
138 #endif
139
140 #endif
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