83 строки
2.9 KiB
C
83 строки
2.9 KiB
C
/* Machine-dependent software floating-point definitions.
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Alpha kernel version.
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Copyright (C) 1997,1998,1999 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Richard Henderson (rth@cygnus.com),
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Jakub Jelinek (jakub@redhat.com) and
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David S. Miller (davem@redhat.com).
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#ifndef _SFP_MACHINE_H
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#define _SFP_MACHINE_H
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#define _FP_W_TYPE_SIZE 64
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#define _FP_W_TYPE unsigned long
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#define _FP_WS_TYPE signed long
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#define _FP_I_TYPE long
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#define _FP_MUL_MEAT_S(R,X,Y) \
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_FP_MUL_MEAT_1_imm(_FP_WFRACBITS_S,R,X,Y)
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#define _FP_MUL_MEAT_D(R,X,Y) \
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_FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
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#define _FP_MUL_MEAT_Q(R,X,Y) \
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_FP_MUL_MEAT_2_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
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#define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_imm(S,R,X,Y,_FP_DIV_HELP_imm)
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#define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_1_udiv(D,R,X,Y)
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#define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_2_udiv(Q,R,X,Y)
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#define _FP_NANFRAC_S _FP_QNANBIT_S
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#define _FP_NANFRAC_D _FP_QNANBIT_D
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#define _FP_NANFRAC_Q _FP_QNANBIT_Q
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#define _FP_NANSIGN_S 1
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#define _FP_NANSIGN_D 1
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#define _FP_NANSIGN_Q 1
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#define _FP_KEEPNANFRACP 1
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/* Alpha Architecture Handbook, 4.7.10.4 sais that
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* we should prefer any type of NaN in Fb, then Fa.
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*/
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#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \
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do { \
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R##_s = Y##_s; \
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_FP_FRAC_COPY_##wc(R,X); \
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R##_c = FP_CLS_NAN; \
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} while (0)
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/* Obtain the current rounding mode. */
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#define FP_ROUNDMODE mode
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#define FP_RND_NEAREST (FPCR_DYN_NORMAL >> FPCR_DYN_SHIFT)
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#define FP_RND_ZERO (FPCR_DYN_CHOPPED >> FPCR_DYN_SHIFT)
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#define FP_RND_PINF (FPCR_DYN_PLUS >> FPCR_DYN_SHIFT)
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#define FP_RND_MINF (FPCR_DYN_MINUS >> FPCR_DYN_SHIFT)
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/* Exception flags. */
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#define FP_EX_INVALID IEEE_TRAP_ENABLE_INV
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#define FP_EX_OVERFLOW IEEE_TRAP_ENABLE_OVF
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#define FP_EX_UNDERFLOW IEEE_TRAP_ENABLE_UNF
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#define FP_EX_DIVZERO IEEE_TRAP_ENABLE_DZE
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#define FP_EX_INEXACT IEEE_TRAP_ENABLE_INE
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#define FP_EX_DENORM IEEE_TRAP_ENABLE_DNO
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#define FP_DENORM_ZERO (swcr & IEEE_MAP_DMZ)
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/* We write the results always */
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#define FP_INHIBIT_RESULTS 0
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#endif
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