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/* Internal math stuff. MIPS version.
Copyright (C) 2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
<http://www.gnu.org/licenses/>. */
#ifndef _MATH_PRIVATE_H
#ifdef __mips_nan2008
/* MIPS aligned to IEEE 754-2008. */
#else
/* One of the few architectures where the meaning of the quiet/signaling bit is
inverse to IEEE 754-2008 (as well as common practice for IEEE 754-1985). */
# define HIGH_ORDER_BIT_IS_SET_FOR_SNAN
#endif
/* Inline functions to speed up the math library implementation. The
default versions of these routines are in generic/math_private.h
and call fesetround, feholdexcept, etc. These routines use inlined
code instead. */
#ifdef __mips_hard_float
# include <fenv.h>
# include <fenv_libc.h>
# include <fpu_control.h>
static __always_inline void
libc_feholdexcept_mips (fenv_t *envp)
{
fpu_control_t cw;
/* Save the current state. */
_FPU_GETCW (cw);
envp->__fp_control_register = cw;
/* Clear all exception enable bits and flags. */
cw &= ~(_FPU_MASK_V|_FPU_MASK_Z|_FPU_MASK_O|_FPU_MASK_U|_FPU_MASK_I|FE_ALL_EXCEPT);
_FPU_SETCW (cw);
}
# define libc_feholdexcept libc_feholdexcept_mips
# define libc_feholdexceptf libc_feholdexcept_mips
# define libc_feholdexceptl libc_feholdexcept_mips
static __always_inline void
libc_fesetround_mips (int round)
{
fpu_control_t cw;
/* Get current state. */
_FPU_GETCW (cw);
/* Set rounding bits. */
cw &= ~_FPU_RC_MASK;
cw |= round;
/* Set new state. */
_FPU_SETCW (cw);
}
# define libc_fesetround libc_fesetround_mips
# define libc_fesetroundf libc_fesetround_mips
# define libc_fesetroundl libc_fesetround_mips
static __always_inline void
libc_feholdexcept_setround_mips (fenv_t *envp, int round)
{
fpu_control_t cw;
/* Save the current state. */
_FPU_GETCW (cw);
envp->__fp_control_register = cw;
/* Clear all exception enable bits and flags. */
cw &= ~(_FPU_MASK_V|_FPU_MASK_Z|_FPU_MASK_O|_FPU_MASK_U|_FPU_MASK_I|FE_ALL_EXCEPT);
/* Set rounding bits. */
cw &= ~_FPU_RC_MASK;
cw |= round;
/* Set new state. */
_FPU_SETCW (cw);
}
# define libc_feholdexcept_setround libc_feholdexcept_setround_mips
# define libc_feholdexcept_setroundf libc_feholdexcept_setround_mips
# define libc_feholdexcept_setroundl libc_feholdexcept_setround_mips
static __always_inline void
libc_fesetenv_mips (fenv_t *envp)
{
fpu_control_t cw;
/* Read current state to flush fpu pipeline. */
_FPU_GETCW (cw);
_FPU_SETCW (envp->__fp_control_register);
}
# define libc_fesetenv libc_fesetenv_mips
# define libc_fesetenvf libc_fesetenv_mips
# define libc_fesetenvl libc_fesetenv_mips
static __always_inline void
libc_feupdateenv_mips (fenv_t *envp)
{
int temp;
/* Save current exceptions. */
_FPU_GETCW (temp);
/* Set flag bits (which are accumulative), and *also* set the
cause bits. The setting of the cause bits is what actually causes
the hardware to generate the exception, if the corresponding enable
bit is set as well. */
temp &= FE_ALL_EXCEPT;
temp |= envp->__fp_control_register | (temp << CAUSE_SHIFT);
/* Set new state. */
_FPU_SETCW (temp);
}
# define libc_feupdateenv libc_feupdateenv_mips
# define libc_feupdateenvf libc_feupdateenv_mips
# define libc_feupdateenvl libc_feupdateenv_mips
#endif
#include_next <math_private.h>
#endif
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