/* Bitwise manipulation over float. Function prototypes.

   Copyright (C) 2011-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Adhemerval Zanella <azanella@br.ibm.com>, 2011

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#ifndef _FLOAT_BITWISE_

#define _FLOAT_BITWISE_ 1

#include <math_private.h>

/* Returns (int)(num & 0x7FFFFFF0 == value) */

static inline int

__float_and_test28 (float num, float value)

{

  float ret;

#ifdef _ARCH_PWR7

  union {

    int i;

    float f;

  } mask = { .i = 0x7ffffff0 };

  __asm__ (

  /* the 'f' constraint is used on mask because we just need

   * to compare floats, not full vector */

    "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask.f)

  );

#else

  int32_t inum;

  GET_FLOAT_WORD(inum, num);

  inum = (inum & 0x7ffffff0);

  SET_FLOAT_WORD(ret, inum);

#endif

  return (ret == value);

}

/* Returns (int)(num & 0x7FFFFF00 == value) */

static inline int

__float_and_test24 (float num, float value)

{

  float ret;

#ifdef _ARCH_PWR7

  union {

    int i;

    float f;

  } mask = { .i = 0x7fffff00 };

  __asm__ (

    "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask.f)

  );

#else

  int32_t inum;

  GET_FLOAT_WORD(inum, num);

  inum = (inum & 0x7fffff00);

  SET_FLOAT_WORD(ret, inum);

#endif

  return (ret == value);

}

/* Returns (float)(num & 0x7F800000) */

static inline float

__float_and8 (float num)

{

  float ret;

#ifdef _ARCH_PWR7

  union {

    int i;

    float f;

  } mask = { .i = 0x7f800000 };

  __asm__ (

    "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask.f)

  );

#else

  int32_t inum;

  GET_FLOAT_WORD(inum, num);

  inum = (inum & 0x7f800000);

  SET_FLOAT_WORD(ret, inum);

#endif

  return ret;

}

/* Returns ((int32_t)(num & 0x7F800000) >> 23) */

static inline int32_t

__float_get_exp (float num)

{

  int32_t inum;

#ifdef _ARCH_PWR7

  float ret;

  union {

    int i;

    float f;

  } mask = { .i = 0x7f800000 };

  __asm__ (

    "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask.f)

  );

  GET_FLOAT_WORD(inum, ret);

#else

  GET_FLOAT_WORD(inum, num);

  inum = inum & 0x7f800000;

#endif

  return inum >> 23;

}

#endif /* s_float_bitwise.h */