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/* Machine-dependent software floating-point definitions.
Sparc64 userland (_Q_* and _Qp_*) version.
Copyright (C) 1997-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Richard Henderson (rth@cygnus.com),
Jakub Jelinek (jj@ultra.linux.cz) and
David S. Miller (davem@redhat.com).
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <fpu_control.h>
#include <fenv.h>
#include <stdlib.h>
#define _FP_W_TYPE_SIZE 64
#define _FP_W_TYPE unsigned long
#define _FP_WS_TYPE signed long
#define _FP_I_TYPE long
/* Helper macros for _FP_MUL_MEAT_2_120_240_double. */
#define _FP_MUL_MEAT_SET_FE_TZ \
do { \
static fpu_control_t _fetz = _FPU_RC_DOWN; \
_FPU_SETCW(_fetz); \
} while (0)
#ifndef _FP_MUL_MEAT_RESET_FE
#define _FP_MUL_MEAT_RESET_FE _FPU_SETCW(_fcw)
#endif
#define _FP_MUL_MEAT_S(R,X,Y) \
_FP_MUL_MEAT_1_imm(_FP_WFRACBITS_S,R,X,Y)
#define _FP_MUL_MEAT_D(R,X,Y) \
_FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
#define _FP_MUL_MEAT_Q(R,X,Y) \
_FP_MUL_MEAT_2_120_240_double(_FP_WFRACBITS_Q,R,X,Y, \
_FP_MUL_MEAT_SET_FE_TZ, \
_FP_MUL_MEAT_RESET_FE)
#define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_imm(S,R,X,Y,_FP_DIV_HELP_imm)
#define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_1_udiv_norm(D,R,X,Y)
#define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_2_udiv(Q,R,X,Y)
#define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1)
#define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1)
#define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1
#define _FP_NANSIGN_S 0
#define _FP_NANSIGN_D 0
#define _FP_NANSIGN_Q 0
#define _FP_KEEPNANFRACP 1
#define _FP_QNANNEGATEDP 0
/* If one NaN is signaling and the other is not,
* we choose that one, otherwise we choose Y.
*/
#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \
do { \
if ((_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs) \
&& !(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)) \
{ \
R##_s = X##_s; \
_FP_FRAC_COPY_##wc(R,X); \
} \
else \
{ \
R##_s = Y##_s; \
_FP_FRAC_COPY_##wc(R,Y); \
} \
R##_c = FP_CLS_NAN; \
} while (0)
/* Obtain the current rounding mode. */
#ifndef FP_ROUNDMODE
#define FP_ROUNDMODE ((_fcw >> 30) & 0x3)
#endif
/* Exception flags. */
#define FP_EX_INVALID (1 << 4)
#define FP_EX_OVERFLOW (1 << 3)
#define FP_EX_UNDERFLOW (1 << 2)
#define FP_EX_DIVZERO (1 << 1)
#define FP_EX_INEXACT (1 << 0)
#define _FP_TININESS_AFTER_ROUNDING 0
#define _FP_DECL_EX \
fpu_control_t _fcw __attribute__ ((unused)) = (FP_RND_NEAREST << 30)
#define FP_INIT_ROUNDMODE \
do { \
_FPU_GETCW(_fcw); \
} while (0)
#define FP_TRAPPING_EXCEPTIONS ((_fcw >> 23) & 0x1f)
#define FP_INHIBIT_RESULTS ((_fcw >> 23) & _fex)
/* Simulate exceptions using double arithmetics. */
extern void __Qp_handle_exceptions(int exc);
#define FP_HANDLE_EXCEPTIONS \
do { \
if (!_fex) \
{ \
/* This is the common case, so we do it inline. \
* We need to clear cexc bits if any. \
*/ \
__asm__ __volatile__("fzero %%f62\n\t" \
"faddd %%f62, %%f62, %%f62" \
: : : "f62"); \
} \
else \
{ \
__Qp_handle_exceptions (_fex); \
} \
} while (0)
#define QP_HANDLE_EXCEPTIONS(_a) \
do { \
if ((_fcw >> 23) & _fex) \
{ \
_a; \
} \
else \
{ \
_fcw = (_fcw & ~0x1fL) | (_fex << 5) | _fex; \
_FPU_SETCW(_fcw); \
} \
} while (0)
#define QP_NO_EXCEPTIONS \
__asm ("fzero %%f62\n\t" \
"faddd %%f62, %%f62, %%f62" : : : "f62")
#define QP_CLOBBER "memory", "f52", "f54", "f56", "f58", "f60", "f62"
#define QP_CLOBBER_CC QP_CLOBBER , "cc"
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