/* Machine-dependent software floating-point definitions. Alpha kernel version. Copyright (C) 1997,1998,1999 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Richard Henderson (rth@cygnus.com), Jakub Jelinek (jakub@redhat.com) 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 Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef _SFP_MACHINE_H #define _SFP_MACHINE_H #define _FP_W_TYPE_SIZE 64 #define _FP_W_TYPE unsigned long #define _FP_WS_TYPE signed long #define _FP_I_TYPE long #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_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm) #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(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 #define _FP_NANFRAC_D _FP_QNANBIT_D #define _FP_NANFRAC_Q _FP_QNANBIT_Q #define _FP_NANSIGN_S 1 #define _FP_NANSIGN_D 1 #define _FP_NANSIGN_Q 1 #define _FP_KEEPNANFRACP 1 /* Alpha Architecture Handbook, 4.7.10.4 sais that * we should prefer any type of NaN in Fb, then Fa. */ #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ do { \ R##_s = Y##_s; \ _FP_FRAC_COPY_##wc(R,X); \ R##_c = FP_CLS_NAN; \ } while (0) /* Obtain the current rounding mode. */ #define FP_ROUNDMODE mode #define FP_RND_NEAREST (FPCR_DYN_NORMAL >> FPCR_DYN_SHIFT) #define FP_RND_ZERO (FPCR_DYN_CHOPPED >> FPCR_DYN_SHIFT) #define FP_RND_PINF (FPCR_DYN_PLUS >> FPCR_DYN_SHIFT) #define FP_RND_MINF (FPCR_DYN_MINUS >> FPCR_DYN_SHIFT) /* Exception flags. */ #define FP_EX_INVALID IEEE_TRAP_ENABLE_INV #define FP_EX_OVERFLOW IEEE_TRAP_ENABLE_OVF #define FP_EX_UNDERFLOW IEEE_TRAP_ENABLE_UNF #define FP_EX_DIVZERO IEEE_TRAP_ENABLE_DZE #define FP_EX_INEXACT IEEE_TRAP_ENABLE_INE #define FP_EX_DENORM IEEE_TRAP_ENABLE_DNO #define FP_DENORM_ZERO (swcr & IEEE_MAP_DMZ) /* We write the results always */ #define FP_INHIBIT_RESULTS 0 #endif |