sys/arch/powerpc/include/fpu.h

   1 /*      $NetBSD: fpu.h,v 1.15.22.1 2007/10/11 18:51:54 garbled Exp $    */
   2
   3 /*-
   4  * Copyright (C) 1996 Wolfgang Solfrank.
   5  * Copyright (C) 1996 TooLs GmbH.
   6  * All rights reserved.
   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 TooLs GmbH.
  19  * 4. The name of TooLs GmbH may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  27  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  28  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33 #ifndef _POWERPC_FPU_H_
  34 #define _POWERPC_FPU_H_
  35
  36 #define FPSCR_FX        0x80000000      /* Exception Summary */
  37 #define FPSCR_FEX       0x40000000      /* Enabled Exception Summary */
  38 #define FPSCR_VX        0x20000000      /* Invalid Operation Exception Summary */
  39 #define FPSCR_OX        0x10000000      /* Overflow Exception */
  40 #define FPSCR_UX        0x08000000      /* Undrflow Exception */
  41 #define FPSCR_ZX        0x04000000      /* Zero Divide Exception */
  42 #define FPSCR_XX        0x02000000      /* Inexact Exception */
  43 #define FPSCR_VXSNAN    0x01000000      /* Invalid Op (NAN) */
  44 #define FPSCR_VXISI     0x00800000      /* Invalid Op (INF-INF) */
  45 #define FPSCR_VXIDI     0x00400000      /* Invalid Op (INF/INF) */
  46 #define FPSCR_VXZDZ     0x00200000      /* Invalid Op (0/0) */
  47 #define FPSCR_VXIMZ     0x00100000      /* Invalid Op (INFx0) */
  48 #define FPSCR_VXVC      0x00080000      /* Invalid Compare Op */
  49 #define FPSCR_FR        0x00040000      /* Fraction Rounded */
  50 #define FPSCR_FI        0x00020000      /* Fraction Inexact */
  51 #define FPSCR_FPRF      0x0001f000
  52 #define FPSCR_C         0x00010000      /* FP Class Descriptor */
  53 #define FPSCR_FPCC      0x0000f000
  54 #define FPSCR_FL        0x00008000      /* < */
  55 #define FPSCR_FG        0x00004000      /* > */
  56 #define FPSCR_FE        0x00002000      /* == */
  57 #define FPSCR_FU        0x00001000      /* unordered */
  58 #define FPSCR_VXSOFT    0x00000400      /* Software Invalid Exception */
  59 #define FPSCR_VXSQRT    0x00000200      /* Invalid Sqrt Exception */
  60 #define FPSCR_VXCVI     0x00000100      /* Invalid Op Integer Cvt Exception */
  61 #define FPSCR_VE        0x00000080      /* Invalid Op Exception Enable */
  62 #define FPSCR_OE        0x00000040      /* Overflow Exception Enable */
  63 #define FPSCR_UE        0x00000020      /* Underflow Exception Enable */
  64 #define FPSCR_ZE        0x00000010      /* Zero Divide Exception Enable */
  65 #define FPSCR_XE        0x00000008      /* Inexact Exception Enable */
  66 #define FPSCR_NI        0x00000004      /* Non-IEEE Mode Enable */
  67 #define FPSCR_RN        0x00000003
  68
  69 #ifdef _KERNEL
  70
  71 #if defined(_KERNEL_OPT)
  72 #include "opt_ppcarch.h"
  73 #include "opt_multiprocessor.h"
  74 #endif
  75
  76 /* List of PowerPC architectures that support FPUs. */
  77 #if defined(PPC_OEA) || defined (PPC_OEA64) || defined (PPC_OEA64_BRIDGE)
  78 #define PPC_HAVE_FPU
  79
  80 #define FPU_SAVE        0
  81 #define FPU_DISCARD     1
  82
  83 void    enable_fpu(void);
  84 void    save_fpu_cpu(void);
  85 void    save_fpu_lwp(struct lwp *, int /*discard*/);
  86 int     get_fpu_fault_code(void);
  87 #endif /* PPC_HAVE_FPU */
  88 #endif /* _KERNEL */
  89
  90 #endif  /* _POWERPC_FPU_H_ */