1*4882a593Smuzhiyun /* Machine-dependent software floating-point definitions. 2*4882a593Smuzhiyun Sparc64 kernel version. 3*4882a593Smuzhiyun Copyright (C) 1997,1998,1999 Free Software Foundation, Inc. 4*4882a593Smuzhiyun This file is part of the GNU C Library. 5*4882a593Smuzhiyun Contributed by Richard Henderson (rth@cygnus.com), 6*4882a593Smuzhiyun Jakub Jelinek (jj@ultra.linux.cz) and 7*4882a593Smuzhiyun David S. Miller (davem@redhat.com). 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun The GNU C Library is free software; you can redistribute it and/or 10*4882a593Smuzhiyun modify it under the terms of the GNU Library General Public License as 11*4882a593Smuzhiyun published by the Free Software Foundation; either version 2 of the 12*4882a593Smuzhiyun License, or (at your option) any later version. 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun The GNU C Library is distributed in the hope that it will be useful, 15*4882a593Smuzhiyun but WITHOUT ANY WARRANTY; without even the implied warranty of 16*4882a593Smuzhiyun MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17*4882a593Smuzhiyun Library General Public License for more details. 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun You should have received a copy of the GNU Library General Public 20*4882a593Smuzhiyun License along with the GNU C Library; see the file COPYING.LIB. If 21*4882a593Smuzhiyun not, write to the Free Software Foundation, Inc., 22*4882a593Smuzhiyun 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun #ifndef _SFP_MACHINE_H 25*4882a593Smuzhiyun #define _SFP_MACHINE_H 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun #define _FP_W_TYPE_SIZE 64 28*4882a593Smuzhiyun #define _FP_W_TYPE unsigned long 29*4882a593Smuzhiyun #define _FP_WS_TYPE signed long 30*4882a593Smuzhiyun #define _FP_I_TYPE long 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun #define _FP_MUL_MEAT_S(R,X,Y) \ 33*4882a593Smuzhiyun _FP_MUL_MEAT_1_imm(_FP_WFRACBITS_S,R,X,Y) 34*4882a593Smuzhiyun #define _FP_MUL_MEAT_D(R,X,Y) \ 35*4882a593Smuzhiyun _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm) 36*4882a593Smuzhiyun #define _FP_MUL_MEAT_Q(R,X,Y) \ 37*4882a593Smuzhiyun _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm) 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun #define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_imm(S,R,X,Y,_FP_DIV_HELP_imm) 40*4882a593Smuzhiyun #define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_1_udiv_norm(D,R,X,Y) 41*4882a593Smuzhiyun #define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_2_udiv(Q,R,X,Y) 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun #define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1) 44*4882a593Smuzhiyun #define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1) 45*4882a593Smuzhiyun #define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1 46*4882a593Smuzhiyun #define _FP_NANSIGN_S 0 47*4882a593Smuzhiyun #define _FP_NANSIGN_D 0 48*4882a593Smuzhiyun #define _FP_NANSIGN_Q 0 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun #define _FP_KEEPNANFRACP 1 51*4882a593Smuzhiyun 52*4882a593Smuzhiyun /* If one NaN is signaling and the other is not, 53*4882a593Smuzhiyun * we choose that one, otherwise we choose X. 54*4882a593Smuzhiyun */ 55*4882a593Smuzhiyun /* For _Qp_* and _Q_*, this should prefer X, for 56*4882a593Smuzhiyun * CPU instruction emulation this should prefer Y. 57*4882a593Smuzhiyun * (see SPAMv9 B.2.2 section). 58*4882a593Smuzhiyun */ 59*4882a593Smuzhiyun #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ 60*4882a593Smuzhiyun do { \ 61*4882a593Smuzhiyun if ((_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs) \ 62*4882a593Smuzhiyun && !(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)) \ 63*4882a593Smuzhiyun { \ 64*4882a593Smuzhiyun R##_s = X##_s; \ 65*4882a593Smuzhiyun _FP_FRAC_COPY_##wc(R,X); \ 66*4882a593Smuzhiyun } \ 67*4882a593Smuzhiyun else \ 68*4882a593Smuzhiyun { \ 69*4882a593Smuzhiyun R##_s = Y##_s; \ 70*4882a593Smuzhiyun _FP_FRAC_COPY_##wc(R,Y); \ 71*4882a593Smuzhiyun } \ 72*4882a593Smuzhiyun R##_c = FP_CLS_NAN; \ 73*4882a593Smuzhiyun } while (0) 74*4882a593Smuzhiyun 75*4882a593Smuzhiyun /* Obtain the current rounding mode. */ 76*4882a593Smuzhiyun #ifndef FP_ROUNDMODE 77*4882a593Smuzhiyun #define FP_ROUNDMODE ((current_thread_info()->xfsr[0] >> 30) & 0x3) 78*4882a593Smuzhiyun #endif 79*4882a593Smuzhiyun 80*4882a593Smuzhiyun /* Exception flags. */ 81*4882a593Smuzhiyun #define FP_EX_INVALID (1 << 4) 82*4882a593Smuzhiyun #define FP_EX_OVERFLOW (1 << 3) 83*4882a593Smuzhiyun #define FP_EX_UNDERFLOW (1 << 2) 84*4882a593Smuzhiyun #define FP_EX_DIVZERO (1 << 1) 85*4882a593Smuzhiyun #define FP_EX_INEXACT (1 << 0) 86*4882a593Smuzhiyun 87*4882a593Smuzhiyun #define FP_HANDLE_EXCEPTIONS return _fex 88*4882a593Smuzhiyun 89*4882a593Smuzhiyun #define FP_INHIBIT_RESULTS ((current_thread_info()->xfsr[0] >> 23) & _fex) 90*4882a593Smuzhiyun 91*4882a593Smuzhiyun #define FP_TRAPPING_EXCEPTIONS ((current_thread_info()->xfsr[0] >> 23) & 0x1f) 92*4882a593Smuzhiyun 93*4882a593Smuzhiyun #endif 94