ad710fc9cf4142ed478928d31dc6f02a19af0cd8
* Copyright (c) 1990 The Regents of the University of California.
* This code is derived from software contributed to Berkeley by
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* @(#)npx.h 5.3 (Berkeley) 1/18/91
* 287/387 NPX Coprocessor Data Structures and Constants
/* Environment information of floating point unit */
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 */
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 env87 sv_env
; /* floating point control/status */
struct fpacc87 sv_ac
[8]; /* accumulator contents, 0-7 */
/* Cyrix EMC memory - mapped coprocessor context switch information */
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 */
/* Intel prefer's long real (53 bit) precision */
#define __iBCS_NPXCW__ 0x262
/* wfj prefer's temporary real (64 bit) precision */
#define __386BSD_NPXCW__ 0x362
#define __INITIAL_NPXCW__ __386BSD_NPXCW__
#define __INITIAL_NPXCW__ __iBCS_NPXCW__