/* soft-fp x * y + z as ternary operation.

   Copyright (C) 2006 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Steven Munroe <sjmunroe@us.ibm.com>, 2006.

   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.

   In addition to the permissions in the GNU Lesser General Public

   License, the Free Software Foundation gives you unlimited

   permission to link the compiled version of this file into

   combinations with other programs, and to distribute those

   combinations without any restriction coming from the use of this

   file.  (The Lesser General Public License restrictions do apply in

   other respects; for example, they cover modification of the file,

   and distribution when not linked into a combine executable.)

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

   License along with the GNU C Library; if not, write to the Free

   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA

   02111-1307 USA.  */

#include "soft-fp.h"

#include "double.h"

#include "quad.h"

/* Compute floating point multiply-add with higher (quad) precision.  */

DFtype

__fmadf4 (DFtype a, DFtype b, DFtype c)

{

    FP_DECL_EX;

    FP_DECL_D(A);

    FP_DECL_D(B);

    FP_DECL_D(C);

    FP_DECL_Q(X);

    FP_DECL_Q(Y);

    FP_DECL_Q(Z);

    FP_DECL_Q(U);

    FP_DECL_Q(V);

    FP_DECL_D(R);

    double r;

    long double u, x, y, z;

    FP_INIT_ROUNDMODE;

    FP_UNPACK_RAW_D (A, a);

    FP_UNPACK_RAW_D (B, b);

    FP_UNPACK_RAW_D (C, c);

    /* Extend double to quad.  */

#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q

    FP_EXTEND(Q,D,4,2,X,A);

    FP_EXTEND(Q,D,4,2,Y,B);

    FP_EXTEND(Q,D,4,2,Z,C);

#else

    FP_EXTEND(Q,D,2,1,X,A);

    FP_EXTEND(Q,D,2,1,Y,B);

    FP_EXTEND(Q,D,2,1,Z,C);

#endif

    FP_PACK_RAW_Q(x,X);

    FP_PACK_RAW_Q(y,Y);

    FP_PACK_RAW_Q(z,Z);

    FP_HANDLE_EXCEPTIONS;

    /* Multiply.

       Rounding is not an issue as we keep the full 106 bit product.  */

    FP_UNPACK_Q(X,x);

    FP_UNPACK_Q(Y,y);

    FP_MUL_Q(U,X,Y);

    FP_PACK_Q(u,U);

    FP_HANDLE_EXCEPTIONS;

    /* Add without rounding.  */

    FP_UNPACK_SEMIRAW_Q(U,u);

    FP_UNPACK_SEMIRAW_Q(Z,z);

    FP_ADD_Q(V,U,Z);

    /* Truncate quad to double and round.  */

#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q

    V_f[3] &= 0x0007ffff;  /* SEMIRAW_TO_SEMIRAW(4) */

    FP_TRUNC(D,Q,2,4,R,V);

#else

    V_f1 &= 0x0007ffffffffffffL;  /* SEMIRAW_TO_SEMIRAW(2) */

    FP_TRUNC(D,Q,1,2,R,V);

#endif

    FP_PACK_SEMIRAW_D(r,R);

    FP_HANDLE_EXCEPTIONS;

    return r;

}

/* soft-fp x * y + z as ternary operation.

   Copyright (C) 2006 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Steven Munroe <sjmunroe@us.ibm.com>, 2006.

   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.

   In addition to the permissions in the GNU Lesser General Public

   License, the Free Software Foundation gives you unlimited

   permission to link the compiled version of this file into

   combinations with other programs, and to distribute those

   combinations without any restriction coming from the use of this

   file.  (The Lesser General Public License restrictions do apply in

   other respects; for example, they cover modification of the file,

   and distribution when not linked into a combine executable.)

   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, write to the Free

   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA

   02111-1307 USA.  */

#include "soft-fp.h"

#include "single.h"

#include "double.h"

/* Compute floating point multiply-add with higher (double) precision.  */

SFtype

__fmasf4 (SFtype a, SFtype b, SFtype c)

{

    FP_DECL_EX;

    FP_DECL_S(A);

    FP_DECL_S(B);

    FP_DECL_S(C);

    FP_DECL_D(X);

    FP_DECL_D(Y);

    FP_DECL_D(Z);

    FP_DECL_D(U);

    FP_DECL_D(V);

    FP_DECL_S(R);

    float r;

    double u, x, y, z;

    FP_INIT_ROUNDMODE;

    FP_UNPACK_RAW_S (A, a);

    FP_UNPACK_RAW_S (B, b);

    FP_UNPACK_RAW_S (C, c);

    /* Extend single to double.  */

#if _FP_W_TYPE_SIZE < _FP_FRACBITS_D

    FP_EXTEND(D,S,2,1,X,A);

    FP_EXTEND(D,S,2,1,Y,B);

    FP_EXTEND(D,S,2,1,Z,C);

#else

    FP_EXTEND(D,S,1,1,X,A);

    FP_EXTEND(D,S,1,1,Y,B);

    FP_EXTEND(D,S,1,1,Z,C);

#endif

    FP_PACK_RAW_D(x,X);

    FP_PACK_RAW_D(y,Y);

    FP_PACK_RAW_D(z,Z);

    FP_HANDLE_EXCEPTIONS;

    /* Multiply.

       Rounding is not an issue as we keep the full 48 bit product.  */

    FP_UNPACK_D(X,x);

    FP_UNPACK_D(Y,y);

    FP_MUL_D(U,X,Y);

    FP_PACK_D(u,U);

    FP_HANDLE_EXCEPTIONS;

    /* Add without rounding.  */

    FP_UNPACK_SEMIRAW_D(U,u);

    FP_UNPACK_SEMIRAW_D(Z,z);

    FP_ADD_D(V,U,Z);

    /* Truncate double to single and round.  */

#if FP_W_TYPE_SIZE < _FP_FRACBITS_D

    V_f1 &= 0x007fffffL;  /* SEMIRAW_TO_SEMIRAW(2) */

    FP_TRUNC(S,D,1,2,R,V);

#else

    V_f &= 0x007fffffffffffffL;  /* SEMIRAW_TO_SEMIRAW(1) */

    FP_TRUNC(S,D,1,1,R,V);

#endif

    FP_PACK_SEMIRAW_S(r,R);

    FP_HANDLE_EXCEPTIONS;

    return r;

}