cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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sfp-machine_64.h (3178B)

      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