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- /* Copyright (c) 1990 UNIX System Laboratories, Inc. */
- /* Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T */
- /* All Rights Reserved */
-
- /* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF */
- /* UNIX System Laboratories, Inc. */
- /* The copyright notice above does not evidence any */
- /* actual or intended publication of such source code. */
-
- #ifndef _SYS_FP_H
- #define _SYS_FP_H
-
- #ident "@(#)/usr/include/sys/fp.h.sl 1.1 4.0 12/08/90 32225 AT&T-USL"
-
- /*
- * 80287/80387 floating point processor definitions
- */
-
- /*
- * values that go into fp_kind
- */
- #define FP_NO 0 /* no fp chip, no emulator (no fp support) */
- #define FP_SW 1 /* no fp chip, using software emulator */
- #define FP_HW 2 /* chip present bit */
- #define FP_287 2 /* 80287 chip present */
- #define FP_387 3 /* 80387 chip present */
-
- /*
- * masks for 80387 control word
- */
- #define FPINV 0x00000001 /* invalid operation */
- #define FPDNO 0x00000002 /* denormalized operand */
- #define FPZDIV 0x00000004 /* zero divide */
- #define FPOVR 0x00000008 /* overflow */
- #define FPUNR 0x00000010 /* underflow */
- #define FPPRE 0x00000020 /* precision */
- #define FPPC 0x00000300 /* precision control */
- #define FPRC 0x00000C00 /* rounding control */
- #define FPIC 0x00001000 /* infinity control */
- #define WFPDE 0x00000080 /* data chain exception */
-
- /*
- * precision, rounding, and infinity options in control word
- */
- #define FPSIG24 0x00000000 /* 24-bit significand precision (short) */
- #define FPSIG53 0x00000200 /* 53-bit significand precision (long) */
- #define FPSIG64 0x00000300 /* 64-bit significand precision (temp) */
- #define FPRTN 0x00000000 /* round to nearest or even */
- #define FPRD 0x00000400 /* round down */
- #define FPRU 0x00000800 /* round up */
- #define FPCHOP 0x00000C00 /* chop (truncate toward zero) */
- #define FPP 0x00000000 /* projective infinity */
- #define FPA 0x00001000 /* affine infinity */
- #define WFPB17 0x00020000 /* bit 17 */
- #define WFPB24 0x01000000 /* bit 24 */
-
- /*
- * masks for 80387 status word
- */
- #define FPS_ES 0x00000080 /* error summary bit */
-
- extern char fp_kind; /* kind of fp support */
- extern struct proc *fp_proc; /* process that owns the fp unit */
-
- /*
- * values for fp_vers
- */
- #define FP_COFF 1
- #define FP_XOUT 2
- /* Since Elf or Coff Format Emulator behaves/works in the same way.
- */
- #define FP_ELF 1
-
- extern char fp_vers; /* used to indicate how to map u-area */
-
- #define EMUL_START 0x15
-
- #endif /* _SYS_FP_H */
-