1  /* OpenRISC softfloat definitions.
       2     Copyright (C) 2022-2023 Free Software Foundation, Inc.
       3  
       4     This file is part of the GNU C Library.
       5  
       6     The GNU C Library is free software; you can redistribute it and/or
       7     modify it under the terms of the GNU Lesser General Public
       8     License as published by the Free Software Foundation; either
       9     version 2.1 of the License, or (at your option) any later version.
      10  
      11     The GNU C Library is distributed in the hope that it will be useful,
      12     but WITHOUT ANY WARRANTY; without even the implied warranty of
      13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14     Lesser General Public License for more details.
      15  
      16     You should have received a copy of the GNU Lesser General Public
      17     License along with the GNU C Library.  If not, see
      18     <https://www.gnu.org/licenses/>.  */
      19  
      20  #define _FP_W_TYPE_SIZE		32
      21  #define _FP_W_TYPE		unsigned long
      22  #define _FP_WS_TYPE		signed long
      23  #define _FP_I_TYPE		long
      24  
      25  #define _FP_MUL_MEAT_S(R,X,Y)				\
      26    _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
      27  #define _FP_MUL_MEAT_D(R,X,Y)				\
      28    _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
      29  #define _FP_MUL_MEAT_Q(R,X,Y)				\
      30    _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
      31  
      32  #define _FP_MUL_MEAT_DW_S(R,X,Y)				\
      33    _FP_MUL_MEAT_DW_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
      34  #define _FP_MUL_MEAT_DW_D(R,X,Y)				\
      35    _FP_MUL_MEAT_DW_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
      36  #define _FP_MUL_MEAT_DW_Q(R,X,Y)				\
      37    _FP_MUL_MEAT_DW_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
      38  
      39  
      40  #define _FP_DIV_MEAT_S(R,X,Y)	_FP_DIV_MEAT_1_loop(S,R,X,Y)
      41  #define _FP_DIV_MEAT_D(R,X,Y)	_FP_DIV_MEAT_2_udiv(D,R,X,Y)
      42  #define _FP_DIV_MEAT_Q(R,X,Y)	_FP_DIV_MEAT_4_udiv(Q,R,X,Y)
      43  
      44  #define _FP_NANFRAC_S		((_FP_QNANBIT_S << 1) - 1)
      45  #define _FP_NANFRAC_D		((_FP_QNANBIT_D << 1) - 1), -1
      46  #define _FP_NANFRAC_Q		((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1
      47  #define _FP_NANSIGN_S		0
      48  #define _FP_NANSIGN_D		0
      49  #define _FP_NANSIGN_Q		0
      50  
      51  #define _FP_KEEPNANFRACP 1
      52  #define _FP_QNANNEGATEDP 0
      53  
      54  /* Someone please check this.  */
      55  #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)			\
      56    do {								\
      57      if ((_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)		\
      58  	&& !(_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs))	\
      59        {								\
      60  	R##_s = Y##_s;						\
      61  	_FP_FRAC_COPY_##wc(R,Y);				\
      62        }								\
      63      else							\
      64        {								\
      65  	R##_s = X##_s;						\
      66  	_FP_FRAC_COPY_##wc(R,X);				\
      67        }								\
      68      R##_c = FP_CLS_NAN;						\
      69    } while (0)
      70  
      71  /* Handle getting and setting rounding mode for soft fp operations.  */
      72  
      73  #define FP_RND_NEAREST		(0x0 << 1)
      74  #define FP_RND_ZERO		(0x1 << 1)
      75  #define FP_RND_PINF		(0x2 << 1)
      76  #define FP_RND_MINF		(0x3 << 1)
      77  #define FP_RND_MASK		(0x3 << 1)
      78  
      79  #define FP_EX_OVERFLOW		(1 << 3)
      80  #define FP_EX_UNDERFLOW		(1 << 4)
      81  #define FP_EX_INEXACT		(1 << 8)
      82  #define FP_EX_INVALID		(1 << 9)
      83  #define FP_EX_DIVZERO		(1 << 11)
      84  #define FP_EX_ALL \
      85  	(FP_EX_INVALID | FP_EX_DIVZERO | FP_EX_OVERFLOW | FP_EX_UNDERFLOW \
      86  	 | FP_EX_INEXACT)
      87  
      88  #define _FP_DECL_EX \
      89    unsigned int _fpcsr __attribute__ ((unused)) = FP_RND_NEAREST
      90  
      91  #define FP_ROUNDMODE (_fpcsr & FP_RND_MASK)
      92  
      93  #define _FP_TININESS_AFTER_ROUNDING 0