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/* Private floating point rounding and exceptions handling. OpenRISC version.
Copyright (C) 2024-2025 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
<https://www.gnu.org/licenses/>. */
#ifndef OR1K_FENV_PRIVATE_H
#define OR1K_FENV_PRIVATE_H 1
#include <fenv.h>
#include <fpu_control.h>
static __always_inline void
libc_feholdexcept_or1k (fenv_t *envp)
{
fpu_control_t cw;
fpu_control_t cw_new;
/* Get and store the environment. */
_FPU_GETCW (cw);
*envp = cw;
/* Clear the exception status flags. */
cw_new = cw & ~FE_ALL_EXCEPT;
if (cw != cw_new)
_FPU_SETCW (cw_new);
}
#define libc_feholdexcept libc_feholdexcept_or1k
#define libc_feholdexceptf libc_feholdexcept_or1k
#define libc_feholdexceptl libc_feholdexcept_or1k
static __always_inline void
libc_fesetround_or1k (int round)
{
fpu_control_t cw;
fpu_control_t cw_new;
_FPU_GETCW (cw);
cw_new = cw & ~_FPU_FPCSR_RM_MASK;
cw_new |= round;
if (cw != cw_new)
_FPU_SETCW (cw_new);
}
#define libc_fesetround libc_fesetround_or1k
#define libc_fesetroundf libc_fesetround_or1k
#define libc_fesetroundl libc_fesetround_or1k
static __always_inline void
libc_feholdexcept_setround_or1k (fenv_t *envp, int round)
{
fpu_control_t cw;
fpu_control_t cw_new;
/* Get and store the environment. */
_FPU_GETCW (cw);
*envp = cw;
/* Clear the status flags and rounding mode. */
cw_new = cw & ~(FE_ALL_EXCEPT | _FPU_FPCSR_RM_MASK);
/* Set rounding mode. */
cw_new |= round;
if (cw != cw_new)
_FPU_SETCW (cw_new);
}
#define libc_feholdexcept_setround libc_feholdexcept_setround_or1k
#define libc_feholdexcept_setroundf libc_feholdexcept_setround_or1k
#define libc_feholdexcept_setroundl libc_feholdexcept_setround_or1k
static __always_inline int
libc_fetestexcept_or1k (int ex)
{
fpu_control_t cw;
/* Get current control word. */
_FPU_GETCW (cw);
/* Check if any of the queried exception flags are set. */
return cw & ex & FE_ALL_EXCEPT;
}
#define libc_fetestexcept libc_fetestexcept_or1k
#define libc_fetestexceptf libc_fetestexcept_or1k
#define libc_fetestexceptl libc_fetestexcept_or1k
static __always_inline void
libc_fesetenv_or1k (const fenv_t *envp)
{
if (envp == FE_DFL_ENV)
_FPU_SETCW (_FPU_DEFAULT);
else
_FPU_SETCW (*envp);
}
#define libc_fesetenv libc_fesetenv_or1k
#define libc_fesetenvf libc_fesetenv_or1k
#define libc_fesetenvl libc_fesetenv_or1k
#define libc_feresetround_noex libc_fesetenv_or1k
#define libc_feresetround_noexf libc_fesetenv_or1k
#define libc_feresetround_noexl libc_fesetenv_or1k
static __always_inline int
libc_feupdateenv_test_or1k (const fenv_t *envp, int ex)
{
fpu_control_t cw;
fpu_control_t cw_new;
int excepts;
/* Get current control word. */
_FPU_GETCW (cw);
/* Merge current exception flags with the passed fenv. */
excepts = cw & FE_ALL_EXCEPT;
cw_new = (envp == FE_DFL_ENV ? _FPU_DEFAULT : *envp) | excepts;
if (__glibc_unlikely (cw != cw_new))
_FPU_SETCW (cw_new);
/* Raise the exceptions if enabled in the new FP state. */
if (__glibc_unlikely (excepts))
__feraiseexcept (excepts);
return excepts & ex;
}
#define libc_feupdateenv_test libc_feupdateenv_test_or1k
#define libc_feupdateenv_testf libc_feupdateenv_test_or1k
#define libc_feupdateenv_testl libc_feupdateenv_test_or1k
static __always_inline void
libc_feupdateenv_or1k (const fenv_t *envp)
{
libc_feupdateenv_test_or1k (envp, 0);
}
#define libc_feupdateenv libc_feupdateenv_or1k
#define libc_feupdateenvf libc_feupdateenv_or1k
#define libc_feupdateenvl libc_feupdateenv_or1k
static __always_inline void
libc_feholdsetround_or1k (fenv_t *envp, int round)
{
fpu_control_t cw;
_FPU_GETCW (cw);
*envp = cw;
/* Check whether rounding modes are different. */
round = (cw ^ round) & _FPU_FPCSR_RM_MASK;
/* Set new rounding mode if different. */
if (__glibc_unlikely (round != 0))
_FPU_SETCW (cw ^ round);
}
#define libc_feholdsetround libc_feholdsetround_or1k
#define libc_feholdsetroundf libc_feholdsetround_or1k
#define libc_feholdsetroundl libc_feholdsetround_or1k
static __always_inline void
libc_feresetround_or1k (fenv_t *envp)
{
fpu_control_t cw;
int round;
_FPU_GETCW (cw);
/* Check whether rounding modes are different. */
round = (*envp ^ cw) & _FPU_FPCSR_RM_MASK;
/* Restore the rounding mode if it was changed. */
if (__glibc_unlikely (round != 0))
_FPU_SETCW (cw ^ round);
}
#define libc_feresetround libc_feresetround_or1k
#define libc_feresetroundf libc_feresetround_or1k
#define libc_feresetroundl libc_feresetround_or1k
#include_next <fenv_private.h>
#endif
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