/* Machine-dependent software floating-point definitions.

   Sparc64 userland (_Q_* and _Qp_*) version.

   Copyright (C) 1997-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Richard Henderson (rth@cygnus.com),

		  Jakub Jelinek (jj@ultra.linux.cz) and

		  David S. Miller (davem@redhat.com).

   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/>.  */

#include <fpu_control.h>

#include <fenv.h>

#include <stdlib.h>

#define _FP_W_TYPE_SIZE		64

#define _FP_W_TYPE		unsigned long

#define _FP_WS_TYPE		signed long

#define _FP_I_TYPE		long

/* Helper macros for _FP_MUL_MEAT_2_120_240_double.  */

#define _FP_MUL_MEAT_SET_FE_TZ		   			\

do {								\

  static fpu_control_t _fetz = _FPU_RC_DOWN;			\

  _FPU_SETCW(_fetz);						\

} while (0)

#ifndef _FP_MUL_MEAT_RESET_FE

#define _FP_MUL_MEAT_RESET_FE _FPU_SETCW(_fcw)

#endif

#define _FP_MUL_MEAT_S(R,X,Y)					\

  _FP_MUL_MEAT_1_imm(_FP_WFRACBITS_S,R,X,Y)

#define _FP_MUL_MEAT_D(R,X,Y)					\

  _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)

#define _FP_MUL_MEAT_Q(R,X,Y)					\

  _FP_MUL_MEAT_2_120_240_double(_FP_WFRACBITS_Q,R,X,Y,		\

				_FP_MUL_MEAT_SET_FE_TZ,		\

				_FP_MUL_MEAT_RESET_FE)

#define _FP_DIV_MEAT_S(R,X,Y)	_FP_DIV_MEAT_1_imm(S,R,X,Y,_FP_DIV_HELP_imm)

#define _FP_DIV_MEAT_D(R,X,Y)	_FP_DIV_MEAT_1_udiv_norm(D,R,X,Y)

#define _FP_DIV_MEAT_Q(R,X,Y)	_FP_DIV_MEAT_2_udiv(Q,R,X,Y)

#define _FP_NANFRAC_S		((_FP_QNANBIT_S << 1) - 1)

#define _FP_NANFRAC_D		((_FP_QNANBIT_D << 1) - 1)

#define _FP_NANFRAC_Q		((_FP_QNANBIT_Q << 1) - 1), -1

#define _FP_NANSIGN_S		0

#define _FP_NANSIGN_D		0

#define _FP_NANSIGN_Q		0

#define _FP_KEEPNANFRACP 1

#define _FP_QNANNEGATEDP 0

/* If one NaN is signaling and the other is not,

 * we choose that one, otherwise we choose Y.

 */

#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)			\

  do {								\

    if ((_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs)		\

	&& !(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs))	\

      {								\

	R##_s = X##_s;						\

	_FP_FRAC_COPY_##wc(R,X);				\

      }								\

    else							\

      {								\

	R##_s = Y##_s;						\

	_FP_FRAC_COPY_##wc(R,Y);				\

      }								\

    R##_c = FP_CLS_NAN;						\

  } while (0)

/* Obtain the current rounding mode. */

#ifndef FP_ROUNDMODE

#define FP_ROUNDMODE	((_fcw >> 30) & 0x3)

#endif

/* Exception flags. */

#define FP_EX_INVALID		(1 << 4)

#define FP_EX_OVERFLOW		(1 << 3)

#define FP_EX_UNDERFLOW		(1 << 2)

#define FP_EX_DIVZERO		(1 << 1)

#define FP_EX_INEXACT		(1 << 0)

#define _FP_TININESS_AFTER_ROUNDING 0

#define _FP_DECL_EX \

  fpu_control_t _fcw __attribute__ ((unused)) = (FP_RND_NEAREST << 30)

#define FP_INIT_ROUNDMODE					\

do {								\

  _FPU_GETCW(_fcw);						\

} while (0)

#define FP_TRAPPING_EXCEPTIONS ((_fcw >> 23) & 0x1f)

#define FP_INHIBIT_RESULTS ((_fcw >> 23) & _fex)

/* Simulate exceptions using double arithmetics. */

extern void __Qp_handle_exceptions(int exc);

#define FP_HANDLE_EXCEPTIONS					\

do {								\

  if (!_fex)							\

    {								\

      /* This is the common case, so we do it inline.		\

       * We need to clear cexc bits if any.			\

       */							\

      __asm__ __volatile__("fzero %%f62\n\t"			\

			   "faddd %%f62, %%f62, %%f62"		\

			   : : : "f62");			\

    }								\

  else								\

    {								\

      __Qp_handle_exceptions (_fex);				\

    }								\

} while (0)

#define QP_HANDLE_EXCEPTIONS(_a)				\

do {								\

  if ((_fcw >> 23) & _fex)					\

    {								\

      _a;							\

    }								\

  else								\

    {								\

      _fcw = (_fcw & ~0x1fL) | (_fex << 5) | _fex;		\

      _FPU_SETCW(_fcw);						\

    }								\

} while (0)

#define QP_NO_EXCEPTIONS					\

  __asm ("fzero %%f62\n\t"					\

	 "faddd %%f62, %%f62, %%f62" : : : "f62")

#define QP_CLOBBER "memory", "f52", "f54", "f56", "f58", "f60", "f62"

#define QP_CLOBBER_CC QP_CLOBBER , "cc"