1 /* Machine-dependent software floating-point definitions. 2 Sparc64 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 (jj@ultra.linux.cz) 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_norm(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 << 1) - 1) 44 #define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1) 45 #define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1 46 #define _FP_NANSIGN_S 0 47 #define _FP_NANSIGN_D 0 48 #define _FP_NANSIGN_Q 0 49 50 #define _FP_KEEPNANFRACP 1 51 52 /* If one NaN is signaling and the other is not, 53 * we choose that one, otherwise we choose X. 54 */ 55 /* For _Qp_* and _Q_*, this should prefer X, for 56 * CPU instruction emulation this should prefer Y. 57 * (see SPAMv9 B.2.2 section). 58 */ 59 #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ 60 do { \ 61 if ((_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs) \ 62 && !(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)) \ 63 { \ 64 R##_s = X##_s; \ 65 _FP_FRAC_COPY_##wc(R,X); \ 66 } \ 67 else \ 68 { \ 69 R##_s = Y##_s; \ 70 _FP_FRAC_COPY_##wc(R,Y); \ 71 } \ 72 R##_c = FP_CLS_NAN; \ 73 } while (0) 74 75 /* Obtain the current rounding mode. */ 76 #ifndef FP_ROUNDMODE 77 #define FP_ROUNDMODE ((current_thread_info()->xfsr[0] >> 30) & 0x3) 78 #endif 79 80 /* Exception flags. */ 81 #define FP_EX_INVALID (1 << 4) 82 #define FP_EX_OVERFLOW (1 << 3) 83 #define FP_EX_UNDERFLOW (1 << 2) 84 #define FP_EX_DIVZERO (1 << 1) 85 #define FP_EX_INEXACT (1 << 0) 86 87 #define FP_HANDLE_EXCEPTIONS return _fex 88 89 #define FP_INHIBIT_RESULTS ((current_thread_info()->xfsr[0] >> 23) & _fex) 90 91 #define FP_TRAPPING_EXCEPTIONS ((current_thread_info()->xfsr[0] >> 23) & 0x1f) 92 93 #endif 94