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fpu.h (77015) fpu.h (79609)
1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without

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29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: @(#)npx.h 5.3 (Berkeley) 1/18/91
1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without

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29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: @(#)npx.h 5.3 (Berkeley) 1/18/91
37 * $FreeBSD: head/sys/amd64/include/fpu.h 77015 2001-05-22 21:20:49Z bde $
37 * $FreeBSD: head/sys/amd64/include/fpu.h 79609 2001-07-12 06:32:51Z peter $
38 */
39
40/*
41 * 287/387 NPX Coprocessor Data Structures and Constants
42 * W. Jolitz 1/90
43 */
44
45#ifndef _MACHINE_NPX_H_

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80 * before it is inspected for ptracing or for core dumps. Some
81 * emulators overwrite the whole struct. We have no good way of
82 * knowing how much padding to leave. Leave just enough for the
83 * GPL emulator's i387_union (176 bytes total).
84 */
85 u_char sv_pad[64]; /* padding; used by emulators */
86};
87
38 */
39
40/*
41 * 287/387 NPX Coprocessor Data Structures and Constants
42 * W. Jolitz 1/90
43 */
44
45#ifndef _MACHINE_NPX_H_

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80 * before it is inspected for ptracing or for core dumps. Some
81 * emulators overwrite the whole struct. We have no good way of
82 * knowing how much padding to leave. Leave just enough for the
83 * GPL emulator's i387_union (176 bytes total).
84 */
85 u_char sv_pad[64]; /* padding; used by emulators */
86};
87
88struct envxmm {
89 u_int16_t en_cw; /* control word (16bits) */
90 u_int16_t en_sw; /* status word (16bits) */
91 u_int16_t en_tw; /* tag word (16bits) */
92 u_int16_t en_opcode; /* opcode last executed (11 bits ) */
93 u_int32_t en_fip; /* floating point instruction pointer */
94 u_int16_t en_fcs; /* floating code segment selector */
95 u_int16_t en_pad0; /* padding */
96 u_int32_t en_foo; /* floating operand offset */
97 u_int16_t en_fos; /* floating operand segment selector */
98 u_int16_t en_pad1; /* padding */
99 u_int32_t en_mxcsr; /* SSE sontorol/status register */
100 u_int32_t en_pad2; /* padding */
101};
102
103/* Contents of each SSE extended accumulator */
104struct xmmacc {
105 u_char xmm_bytes[16];
106};
107
108struct savexmm {
109 struct envxmm sv_env;
110 struct {
111 struct fpacc87 fp_acc;
112 u_char fp_pad[6]; /* padding */
113 } sv_fp[8];
114 struct xmmacc sv_xmm[8];
115 u_long sv_ex_sw; /* status word for last exception */
116 u_char sv_pad[220];
117} __attribute__((aligned(16)));
118
119union savefpu {
120 struct save87 sv_87;
121 struct savexmm sv_xmm;
122};
123
88/*
89 * The hardware default control word for i387's and later coprocessors is
90 * 0x37F, giving:
91 *
92 * round to nearest
93 * 64-bit precision
94 * all exceptions masked.
95 *

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103 * intermediate values are stored in memory or in FPU registers.
104 */
105#define __INITIAL_NPXCW__ 0x127F
106
107#ifdef _KERNEL
108int npxdna __P((void));
109void npxexit __P((struct proc *p));
110void npxinit __P((int control));
124/*
125 * The hardware default control word for i387's and later coprocessors is
126 * 0x37F, giving:
127 *
128 * round to nearest
129 * 64-bit precision
130 * all exceptions masked.
131 *

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139 * intermediate values are stored in memory or in FPU registers.
140 */
141#define __INITIAL_NPXCW__ 0x127F
142
143#ifdef _KERNEL
144int npxdna __P((void));
145void npxexit __P((struct proc *p));
146void npxinit __P((int control));
111void npxsave __P((struct save87 *addr));
147void npxsave __P((union savefpu *addr));
112int npxtrap __P((void));
113#endif
114
115#endif /* !_MACHINE_NPX_H_ */
148int npxtrap __P((void));
149#endif
150
151#endif /* !_MACHINE_NPX_H_ */