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- /*-
- * Copyright (c) 1990 The Regents of the University of California.
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * William Jolitz.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)npx.h 5.3 (Berkeley) 1/18/91
- */
-
- /*
- * 287/387 NPX Coprocessor Data Structures and Constants
- * W. Jolitz 1/90
- */
-
- #ifndef ___NPX87___
- #define ___NPX87___
-
- /* Environment information of floating point unit */
- struct env87 {
- long en_cw; /* control word (16bits) */
- long en_sw; /* status word (16bits) */
- long en_tw; /* tag word (16bits) */
- long en_fip; /* floating point instruction pointer */
- u_short en_fcs; /* floating code segment selector */
- u_short en_opcode; /* opcode last executed (11 bits ) */
- long en_foo; /* floating operand offset */
- long en_fos; /* floating operand segment selector */
- };
-
- /* Contents of each floating point accumulator */
- struct fpacc87 {
- u_long fp_mantlo; /* mantissa low (31:0) */
- u_long fp_manthi; /* mantissa high (63:32) */
- int fp_exp:15; /* exponent */
- int fp_sgn:1; /* mantissa sign */
- };
-
- /* Floating point context */
- struct save87 {
- struct env87 sv_env; /* floating point control/status */
- struct fpacc87 sv_ac[8]; /* accumulator contents, 0-7 */
- };
-
- /* Cyrix EMC memory - mapped coprocessor context switch information */
- struct emcsts {
- long em_msw; /* memory mapped status register when swtched */
- long em_tar; /* memory mapped temp A register when swtched */
- long em_dl; /* memory mapped D low register when swtched */
- };
- #endif ___NPX87___
-