include/asm/sfp-machine.h

0001 /* Machine-dependent software floating-point definitions.
0002    Alpha kernel version.
0003    Copyright (C) 1997,1998,1999 Free Software Foundation, Inc.
0004    This file is part of the GNU C Library.
0005    Contributed by Richard Henderson (rth@cygnus.com),
0006           Jakub Jelinek (jakub@redhat.com) and
0007           David S. Miller (davem@redhat.com).
0008
0009    The GNU C Library is free software; you can redistribute it and/or
0010    modify it under the terms of the GNU Library General Public License as
0011    published by the Free Software Foundation; either version 2 of the
0012    License, or (at your option) any later version.
0013
0014    The GNU C Library is distributed in the hope that it will be useful,
0015    but WITHOUT ANY WARRANTY; without even the implied warranty of
0016    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
0017    Library General Public License for more details.
0018
0019    You should have received a copy of the GNU Library General Public
0020    License along with the GNU C Library; see the file COPYING.LIB.  If
0021    not, write to the Free Software Foundation, Inc.,
0022    59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
0023
0024 #ifndef _SFP_MACHINE_H
0025 #define _SFP_MACHINE_H
0026
0027 #define _FP_W_TYPE_SIZE     64
0028 #define _FP_W_TYPE      unsigned long
0029 #define _FP_WS_TYPE     signed long
0030 #define _FP_I_TYPE      long
0031
0032 #define _FP_MUL_MEAT_S(R,X,Y)                   \
0033   _FP_MUL_MEAT_1_imm(_FP_WFRACBITS_S,R,X,Y)
0034 #define _FP_MUL_MEAT_D(R,X,Y)                   \
0035   _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
0036 #define _FP_MUL_MEAT_Q(R,X,Y)                   \
0037   _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
0038
0039 #define _FP_DIV_MEAT_S(R,X,Y)   _FP_DIV_MEAT_1_imm(S,R,X,Y,_FP_DIV_HELP_imm)
0040 #define _FP_DIV_MEAT_D(R,X,Y)   _FP_DIV_MEAT_1_udiv(D,R,X,Y)
0041 #define _FP_DIV_MEAT_Q(R,X,Y)   _FP_DIV_MEAT_2_udiv(Q,R,X,Y)
0042
0043 #define _FP_NANFRAC_S       _FP_QNANBIT_S
0044 #define _FP_NANFRAC_D       _FP_QNANBIT_D
0045 #define _FP_NANFRAC_Q       _FP_QNANBIT_Q
0046 #define _FP_NANSIGN_S       1
0047 #define _FP_NANSIGN_D       1
0048 #define _FP_NANSIGN_Q       1
0049
0050 #define _FP_KEEPNANFRACP 1
0051
0052 /* Alpha Architecture Handbook, 4.7.10.4 sais that
0053  * we should prefer any type of NaN in Fb, then Fa.
0054  */
0055 #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)          \
0056   do {                              \
0057     R##_s = Y##_s;                      \
0058     _FP_FRAC_COPY_##wc(R,X);                    \
0059     R##_c = FP_CLS_NAN;                     \
0060   } while (0)
0061
0062 /* Obtain the current rounding mode. */
0063 #define FP_ROUNDMODE    mode
0064 #define FP_RND_NEAREST  (FPCR_DYN_NORMAL >> FPCR_DYN_SHIFT)
0065 #define FP_RND_ZERO (FPCR_DYN_CHOPPED >> FPCR_DYN_SHIFT)
0066 #define FP_RND_PINF (FPCR_DYN_PLUS >> FPCR_DYN_SHIFT)
0067 #define FP_RND_MINF (FPCR_DYN_MINUS >> FPCR_DYN_SHIFT)
0068
0069 /* Exception flags. */
0070 #define FP_EX_INVALID       IEEE_TRAP_ENABLE_INV
0071 #define FP_EX_OVERFLOW      IEEE_TRAP_ENABLE_OVF
0072 #define FP_EX_UNDERFLOW     IEEE_TRAP_ENABLE_UNF
0073 #define FP_EX_DIVZERO       IEEE_TRAP_ENABLE_DZE
0074 #define FP_EX_INEXACT       IEEE_TRAP_ENABLE_INE
0075 #define FP_EX_DENORM        IEEE_TRAP_ENABLE_DNO
0076
0077 #define FP_DENORM_ZERO      (swcr & IEEE_MAP_DMZ)
0078
0079 /* We write the results always */
0080 #define FP_INHIBIT_RESULTS 0
0081
0082 #endif