include/asm/sfp-machine_64.h

0001 /* Machine-dependent software floating-point definitions.
0002    Sparc64 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 (jj@ultra.linux.cz) 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_norm(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 << 1) - 1)
0044 #define _FP_NANFRAC_D       ((_FP_QNANBIT_D << 1) - 1)
0045 #define _FP_NANFRAC_Q       ((_FP_QNANBIT_Q << 1) - 1), -1
0046 #define _FP_NANSIGN_S       0
0047 #define _FP_NANSIGN_D       0
0048 #define _FP_NANSIGN_Q       0
0049
0050 #define _FP_KEEPNANFRACP 1
0051
0052 /* If one NaN is signaling and the other is not,
0053  * we choose that one, otherwise we choose X.
0054  */
0055 /* For _Qp_* and _Q_*, this should prefer X, for
0056  * CPU instruction emulation this should prefer Y.
0057  * (see SPAMv9 B.2.2 section).
0058  */
0059 #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)          \
0060   do {                              \
0061     if ((_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs)      \
0062     && !(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)) \
0063       {                             \
0064     R##_s = X##_s;                      \
0065     _FP_FRAC_COPY_##wc(R,X);                \
0066       }                             \
0067     else                            \
0068       {                             \
0069     R##_s = Y##_s;                      \
0070     _FP_FRAC_COPY_##wc(R,Y);                \
0071       }                             \
0072     R##_c = FP_CLS_NAN;                     \
0073   } while (0)
0074
0075 /* Obtain the current rounding mode. */
0076 #ifndef FP_ROUNDMODE
0077 #define FP_ROUNDMODE    ((current_thread_info()->xfsr[0] >> 30) & 0x3)
0078 #endif
0079
0080 /* Exception flags. */
0081 #define FP_EX_INVALID       (1 << 4)
0082 #define FP_EX_OVERFLOW      (1 << 3)
0083 #define FP_EX_UNDERFLOW     (1 << 2)
0084 #define FP_EX_DIVZERO       (1 << 1)
0085 #define FP_EX_INEXACT       (1 << 0)
0086
0087 #define FP_HANDLE_EXCEPTIONS return _fex
0088
0089 #define FP_INHIBIT_RESULTS ((current_thread_info()->xfsr[0] >> 23) & _fex)
0090
0091 #define FP_TRAPPING_EXCEPTIONS ((current_thread_info()->xfsr[0] >> 23) & 0x1f)
0092
0093 #endif