LXR linux/arch/ia64/include/uapi/asm/fpu.h

   1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2#ifndef _ASM_IA64_FPU_H
   3#define _ASM_IA64_FPU_H
   4
   5/*
   6 * Copyright (C) 1998, 1999, 2002, 2003 Hewlett-Packard Co
   7 *      David Mosberger-Tang <davidm@hpl.hp.com>
   8 */
   9
  10#include <linux/types.h>
  11
  12/* floating point status register: */
  13#define FPSR_TRAP_VD    (1 << 0)        /* invalid op trap disabled */
  14#define FPSR_TRAP_DD    (1 << 1)        /* denormal trap disabled */
  15#define FPSR_TRAP_ZD    (1 << 2)        /* zero-divide trap disabled */
  16#define FPSR_TRAP_OD    (1 << 3)        /* overflow trap disabled */
  17#define FPSR_TRAP_UD    (1 << 4)        /* underflow trap disabled */
  18#define FPSR_TRAP_ID    (1 << 5)        /* inexact trap disabled */
  19#define FPSR_S0(x)      ((x) <<  6)
  20#define FPSR_S1(x)      ((x) << 19)
  21#define FPSR_S2(x)      (__IA64_UL(x) << 32)
  22#define FPSR_S3(x)      (__IA64_UL(x) << 45)
  23
  24/* floating-point status field controls: */
  25#define FPSF_FTZ        (1 << 0)                /* flush-to-zero */
  26#define FPSF_WRE        (1 << 1)                /* widest-range exponent */
  27#define FPSF_PC(x)      (((x) & 0x3) << 2)      /* precision control */
  28#define FPSF_RC(x)      (((x) & 0x3) << 4)      /* rounding control */
  29#define FPSF_TD         (1 << 6)                /* trap disabled */
  30
  31/* floating-point status field flags: */
  32#define FPSF_V          (1 <<  7)               /* invalid operation flag */
  33#define FPSF_D          (1 <<  8)               /* denormal/unnormal operand flag */
  34#define FPSF_Z          (1 <<  9)               /* zero divide (IEEE) flag */
  35#define FPSF_O          (1 << 10)               /* overflow (IEEE) flag */
  36#define FPSF_U          (1 << 11)               /* underflow (IEEE) flag */
  37#define FPSF_I          (1 << 12)               /* inexact (IEEE) flag) */
  38
  39/* floating-point rounding control: */
  40#define FPRC_NEAREST    0x0
  41#define FPRC_NEGINF     0x1
  42#define FPRC_POSINF     0x2
  43#define FPRC_TRUNC      0x3
  44
  45#define FPSF_DEFAULT    (FPSF_PC (0x3) | FPSF_RC (FPRC_NEAREST))
  46
  47/* This default value is the same as HP-UX uses.  Don't change it
  48   without a very good reason.  */
  49#define FPSR_DEFAULT    (FPSR_TRAP_VD | FPSR_TRAP_DD | FPSR_TRAP_ZD     \
  50                         | FPSR_TRAP_OD | FPSR_TRAP_UD | FPSR_TRAP_ID   \
  51                         | FPSR_S0 (FPSF_DEFAULT)                       \
  52                         | FPSR_S1 (FPSF_DEFAULT | FPSF_TD | FPSF_WRE)  \
  53                         | FPSR_S2 (FPSF_DEFAULT | FPSF_TD)             \
  54                         | FPSR_S3 (FPSF_DEFAULT | FPSF_TD))
  55
  56# ifndef __ASSEMBLY__
  57
  58struct ia64_fpreg {
  59        union {
  60                unsigned long bits[2];
  61                long double __dummy;    /* force 16-byte alignment */
  62        } u;
  63};
  64
  65# endif /* __ASSEMBLY__ */
  66
  67#endif /* _ASM_IA64_FPU_H */
  68