1 /* Machine-dependent software floating-point definitions. 2 Alpha kernel version. 3 Copyright (C) 1997,1998,1999 Free Software Foundation, Inc. 4 This file is part of the GNU C Library. 5 Contributed by Richard Henderson (rth@cygnus.com), 6 Jakub Jelinek (jakub@redhat.com) and 7 David S. Miller (davem@redhat.com). 8 9 The GNU C Library is free software; you can redistribute it and/or 10 modify it under the terms of the GNU Library General Public License as 11 published by the Free Software Foundation; either version 2 of the 12 License, or (at your option) any later version. 13 14 The GNU C Library is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 Library General Public License for more details. 18 19 You should have received a copy of the GNU Library General Public 20 License along with the GNU C Library; see the file COPYING.LIB. If 21 not, write to the Free Software Foundation, Inc., 22 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 23 24 #ifndef _SFP_MACHINE_H 25 #define _SFP_MACHINE_H 26 27 #define _FP_W_TYPE_SIZE 64 28 #define _FP_W_TYPE unsigned long 29 #define _FP_WS_TYPE signed long 30 #define _FP_I_TYPE long 31 32 #define _FP_MUL_MEAT_S(R,X,Y) \ 33 _FP_MUL_MEAT_1_imm(_FP_WFRACBITS_S,R,X,Y) 34 #define _FP_MUL_MEAT_D(R,X,Y) \ 35 _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm) 36 #define _FP_MUL_MEAT_Q(R,X,Y) \ 37 _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm) 38 39 #define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_imm(S,R,X,Y,_FP_DIV_HELP_imm) 40 #define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_1_udiv(D,R,X,Y) 41 #define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_2_udiv(Q,R,X,Y) 42 43 #define _FP_NANFRAC_S _FP_QNANBIT_S 44 #define _FP_NANFRAC_D _FP_QNANBIT_D 45 #define _FP_NANFRAC_Q _FP_QNANBIT_Q 46 #define _FP_NANSIGN_S 1 47 #define _FP_NANSIGN_D 1 48 #define _FP_NANSIGN_Q 1 49 50 #define _FP_KEEPNANFRACP 1 51 52 /* Alpha Architecture Handbook, 4.7.10.4 sais that 53 * we should prefer any type of NaN in Fb, then Fa. 54 */ 55 #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ 56 do { \ 57 R##_s = Y##_s; \ 58 _FP_FRAC_COPY_##wc(R,X); \ 59 R##_c = FP_CLS_NAN; \ 60 } while (0) 61 62 /* Obtain the current rounding mode. */ 63 #define FP_ROUNDMODE mode 64 #define FP_RND_NEAREST (FPCR_DYN_NORMAL >> FPCR_DYN_SHIFT) 65 #define FP_RND_ZERO (FPCR_DYN_CHOPPED >> FPCR_DYN_SHIFT) 66 #define FP_RND_PINF (FPCR_DYN_PLUS >> FPCR_DYN_SHIFT) 67 #define FP_RND_MINF (FPCR_DYN_MINUS >> FPCR_DYN_SHIFT) 68 69 /* Exception flags. */ 70 #define FP_EX_INVALID IEEE_TRAP_ENABLE_INV 71 #define FP_EX_OVERFLOW IEEE_TRAP_ENABLE_OVF 72 #define FP_EX_UNDERFLOW IEEE_TRAP_ENABLE_UNF 73 #define FP_EX_DIVZERO IEEE_TRAP_ENABLE_DZE 74 #define FP_EX_INEXACT IEEE_TRAP_ENABLE_INE 75 #define FP_EX_DENORM IEEE_TRAP_ENABLE_DNO 76 77 #define FP_DENORM_ZERO (swcr & IEEE_MAP_DMZ) 78 79 /* We write the results always */ 80 #define FP_INHIBIT_RESULTS 0 81 82 #endif 83