/* Internal math stuff.  MIPS version.

   Copyright (C) 2013-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   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 MIPS_MATH_PRIVATE_H

#define MIPS_MATH_PRIVATE_H 1

/* Inline functions to speed up the math library implementation.  The

   default versions of these routines are in generic/math_private.h

   and call fesetround, feholdexcept, etc.  These routines use inlined

   code instead.  */

#ifdef __mips_hard_float

# include <fenv.h>

# include <fenv_libc.h>

# include <fpu_control.h>

# define _FPU_MASK_ALL (_FPU_MASK_V | _FPU_MASK_Z | _FPU_MASK_O \

			|_FPU_MASK_U | _FPU_MASK_I | FE_ALL_EXCEPT)

static __always_inline void

libc_feholdexcept_mips (fenv_t *envp)

{

  fpu_control_t cw;

  /* Save the current state.  */

  _FPU_GETCW (cw);

  envp->__fp_control_register = cw;

  /* Clear all exception enable bits and flags.  */

  cw &= ~(_FPU_MASK_ALL);

  _FPU_SETCW (cw);

}

# define libc_feholdexcept libc_feholdexcept_mips

# define libc_feholdexceptf libc_feholdexcept_mips

# define libc_feholdexceptl libc_feholdexcept_mips

static __always_inline void

libc_fesetround_mips (int round)

{

  fpu_control_t cw;

  /* Get current state.  */

  _FPU_GETCW (cw);

  /* Set rounding bits.  */

  cw &= ~_FPU_RC_MASK;

  cw |= round;

  /* Set new state.  */

  _FPU_SETCW (cw);

}

# define libc_fesetround libc_fesetround_mips

# define libc_fesetroundf libc_fesetround_mips

# define libc_fesetroundl libc_fesetround_mips

static __always_inline void

libc_feholdexcept_setround_mips (fenv_t *envp, int round)

{

  fpu_control_t cw;

  /* Save the current state.  */

  _FPU_GETCW (cw);

  envp->__fp_control_register = cw;

  /* Clear all exception enable bits and flags.  */

  cw &= ~(_FPU_MASK_ALL);

  /* Set rounding bits.  */

  cw &= ~_FPU_RC_MASK;

  cw |= round;

  /* Set new state.  */

  _FPU_SETCW (cw);

}

# define libc_feholdexcept_setround libc_feholdexcept_setround_mips

# define libc_feholdexcept_setroundf libc_feholdexcept_setround_mips

# define libc_feholdexcept_setroundl libc_feholdexcept_setround_mips

# define libc_feholdsetround libc_feholdexcept_setround_mips

# define libc_feholdsetroundf libc_feholdexcept_setround_mips

# define libc_feholdsetroundl libc_feholdexcept_setround_mips

static __always_inline void

libc_fesetenv_mips (fenv_t *envp)

{

  fpu_control_t cw __attribute__ ((unused));

  /* Read current state to flush fpu pipeline.  */

  _FPU_GETCW (cw);

  _FPU_SETCW (envp->__fp_control_register);

}

# define libc_fesetenv libc_fesetenv_mips

# define libc_fesetenvf libc_fesetenv_mips

# define libc_fesetenvl libc_fesetenv_mips

static __always_inline int

libc_feupdateenv_test_mips (fenv_t *envp, int excepts)

{

  /* int ret = fetestexcept (excepts); feupdateenv (envp); return ret; */

  int cw, temp;

  /* Get current control word.  */

  _FPU_GETCW (cw);

  /* Set flag bits (which are accumulative), and *also* set the

     cause bits.  The setting of the cause bits is what actually causes

     the hardware to generate the exception, if the corresponding enable

     bit is set as well.  */

  temp = cw & FE_ALL_EXCEPT;

  temp |= envp->__fp_control_register | (temp << CAUSE_SHIFT);

  /* Set new state.  */

  _FPU_SETCW (temp);

  return cw & excepts & FE_ALL_EXCEPT;

}

# define libc_feupdateenv_test libc_feupdateenv_test_mips

# define libc_feupdateenv_testf libc_feupdateenv_test_mips

# define libc_feupdateenv_testl libc_feupdateenv_test_mips

static __always_inline void

libc_feupdateenv_mips (fenv_t *envp)

{

  libc_feupdateenv_test_mips (envp, 0);

}

# define libc_feupdateenv libc_feupdateenv_mips

# define libc_feupdateenvf libc_feupdateenv_mips

# define libc_feupdateenvl libc_feupdateenv_mips

# define libc_feresetround libc_feupdateenv_mips

# define libc_feresetroundf libc_feupdateenv_mips

# define libc_feresetroundl libc_feupdateenv_mips

static __always_inline int

libc_fetestexcept_mips (int excepts)

{

  int cw;

  /* Get current control word.  */

  _FPU_GETCW (cw);

  return cw & excepts & FE_ALL_EXCEPT;

}

# define libc_fetestexcept libc_fetestexcept_mips

# define libc_fetestexceptf libc_fetestexcept_mips

# define libc_fetestexceptl libc_fetestexcept_mips

/*  Enable support for rounding mode context.  */

# define HAVE_RM_CTX 1

static __always_inline void

libc_feholdexcept_setround_mips_ctx (struct rm_ctx *ctx, int round)

{

  fpu_control_t old, new;

  /* Save the current state.  */

  _FPU_GETCW (old);

  ctx->env.__fp_control_register = old;

  /* Clear all exception enable bits and flags.  */

  new = old & ~(_FPU_MASK_ALL);

  /* Set rounding bits.  */

  new = (new & ~_FPU_RC_MASK) | round;

  if (__glibc_unlikely (new != old))

    {

      _FPU_SETCW (new);

      ctx->updated_status = true;

    }

  else

    ctx->updated_status = false;

}

# define libc_feholdexcept_setround_ctx   libc_feholdexcept_setround_mips_ctx

# define libc_feholdexcept_setroundf_ctx  libc_feholdexcept_setround_mips_ctx

# define libc_feholdexcept_setroundl_ctx  libc_feholdexcept_setround_mips_ctx

static __always_inline void

libc_fesetenv_mips_ctx (struct rm_ctx *ctx)

{

  libc_fesetenv_mips (&ctx->env);

}

# define libc_fesetenv_ctx                libc_fesetenv_mips_ctx

# define libc_fesetenvf_ctx               libc_fesetenv_mips_ctx

# define libc_fesetenvl_ctx               libc_fesetenv_mips_ctx

static __always_inline void

libc_feupdateenv_mips_ctx (struct rm_ctx *ctx)

{

  if (__glibc_unlikely (ctx->updated_status))

    libc_feupdateenv_test_mips (&ctx->env, 0);

}

# define libc_feupdateenv_ctx             libc_feupdateenv_mips_ctx

# define libc_feupdateenvf_ctx            libc_feupdateenv_mips_ctx

# define libc_feupdateenvl_ctx            libc_feupdateenv_mips_ctx

# define libc_feresetround_ctx            libc_feupdateenv_mips_ctx

# define libc_feresetroundf_ctx           libc_feupdateenv_mips_ctx

# define libc_feresetroundl_ctx           libc_feupdateenv_mips_ctx

static __always_inline void

libc_feholdsetround_mips_ctx (struct rm_ctx *ctx, int round)

{

  fpu_control_t old, new;

  /* Save the current state.  */

  _FPU_GETCW (old);

  ctx->env.__fp_control_register = old;

  /* Set rounding bits.  */

  new = (old & ~_FPU_RC_MASK) | round;

  if (__glibc_unlikely (new != old))

    {

      _FPU_SETCW (new);

      ctx->updated_status = true;

    }

  else

    ctx->updated_status = false;

}

# define libc_feholdsetround_ctx          libc_feholdsetround_mips_ctx

# define libc_feholdsetroundf_ctx         libc_feholdsetround_mips_ctx

# define libc_feholdsetroundl_ctx         libc_feholdsetround_mips_ctx

#endif

#include_next <math_private.h>

#endif