projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 9389e810 WJ |
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 | |
| 9 | * modification, are permitted provided that the following conditions | |
| 10 | * are met: | |
| 11 | * 1. Redistributions of source code must retain the above copyright | |
| 12 | * notice, this list of conditions and the following disclaimer. | |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 14 | * notice, this list of conditions and the following disclaimer in the | |
| 15 | * documentation and/or other materials provided with the distribution. | |
| 16 | * 3. All advertising materials mentioning features or use of this software | |
| 17 | * must display the following acknowledgement: | |
| 18 | * This product includes software developed by the University of | |
| 19 | * California, Berkeley and its contributors. | |
| 20 | * 4. Neither the name of the University nor the names of its contributors | |
| 21 | * may be used to endorse or promote products derived from this software | |
| 22 | * without specific prior written permission. | |
| 23 | * | |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 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 | * @(#)npx.h 5.3 (Berkeley) 1/18/91 | |
| 37 | */ | |
| 38 | ||
| 39 | /* | |
| 40 | * 287/387 NPX Coprocessor Data Structures and Constants | |
| 41 | * W. Jolitz 1/90 | |
| 42 | */ | |
| 43 | ||
| 44 | #ifndef ___NPX87___ | |
| 45 | #define ___NPX87___ | |
| 46 | ||
| 47 | /* Environment information of floating point unit */ | |
| 48 | struct env87 { | |
| 49 | long en_cw; /* control word (16bits) */ | |
| 50 | long en_sw; /* status word (16bits) */ | |
| 51 | long en_tw; /* tag word (16bits) */ | |
| 52 | long en_fip; /* floating point instruction pointer */ | |
| 53 | u_short en_fcs; /* floating code segment selector */ | |
| 54 | u_short en_opcode; /* opcode last executed (11 bits ) */ | |
| 55 | long en_foo; /* floating operand offset */ | |
| 56 | long en_fos; /* floating operand segment selector */ | |
| 57 | }; | |
| 58 | ||
| 59 | /* Contents of each floating point accumulator */ | |
| 60 | struct fpacc87 { | |
| 61 | u_long fp_mantlo; /* mantissa low (31:0) */ | |
| 62 | u_long fp_manthi; /* mantissa high (63:32) */ | |
| 63 | int fp_exp:15; /* exponent */ | |
| 64 | int fp_sgn:1; /* mantissa sign */ | |
| 65 | }; | |
| 66 | ||
| 67 | /* Floating point context */ | |
| 68 | struct save87 { | |
| 69 | struct env87 sv_env; /* floating point control/status */ | |
| 70 | struct fpacc87 sv_ac[8]; /* accumulator contents, 0-7 */ | |
| 71 | }; | |
| 72 | ||
| 73 | /* Cyrix EMC memory - mapped coprocessor context switch information */ | |
| 74 | struct emcsts { | |
| 75 | long em_msw; /* memory mapped status register when swtched */ | |
| 76 | long em_tar; /* memory mapped temp A register when swtched */ | |
| 77 | long em_dl; /* memory mapped D low register when swtched */ | |
| 78 | }; | |
| 79 | ||
| 80 | /* Intel prefer's long real (53 bit) precision */ | |
| 81 | #define __iBCS_NPXCW__ 0x262 | |
| 82 | /* wfj prefer's temporary real (64 bit) precision */ | |
| 83 | #define __386BSD_NPXCW__ 0x362 | |
| 84 | ||
| 85 | #ifdef __386BSD__ | |
| 86 | #define __INITIAL_NPXCW__ __386BSD_NPXCW__ | |
| 87 | #else | |
| 88 | #define __INITIAL_NPXCW__ __iBCS_NPXCW__ | |
| 89 | #endif | |
| 90 | ||
| 91 | #endif ___NPX87___ |