|
Packit |
6c4009 |
/* Private floating point rounding and exceptions handling. RISC-V version.
|
|
Packit |
6c4009 |
Copyright (C) 2014-2018 Free Software Foundation, Inc.
|
|
Packit |
6c4009 |
This file is part of the GNU C Library.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
The GNU C Library is free software; you can redistribute it and/or
|
|
Packit |
6c4009 |
modify it under the terms of the GNU Lesser General Public
|
|
Packit |
6c4009 |
License as published by the Free Software Foundation; either
|
|
Packit |
6c4009 |
version 2.1 of the License, or (at your option) any later version.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
The GNU C Library is distributed in the hope that it will be useful,
|
|
Packit |
6c4009 |
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
Packit |
6c4009 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Packit |
6c4009 |
Lesser General Public License for more details.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
You should have received a copy of the GNU Lesser General Public
|
|
Packit |
6c4009 |
License along with the GNU C Library; if not, see
|
|
Packit |
6c4009 |
<http://www.gnu.org/licenses/>. */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#ifndef RISCV_MATH_PRIVATE_H
|
|
Packit |
6c4009 |
#define RISCV_MATH_PRIVATE_H 1
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#include <fenv.h>
|
|
Packit |
6c4009 |
#include <fpu_control.h>
|
|
Packit |
6c4009 |
#include <get-rounding-mode.h>
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static __always_inline int
|
|
Packit |
6c4009 |
riscv_getround (void)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
return get_rounding_mode ();
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static __always_inline void
|
|
Packit |
6c4009 |
riscv_setround (int rm)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
asm volatile ("fsrm %z0" : : "rJ" (rm));
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static __always_inline int
|
|
Packit |
6c4009 |
riscv_getflags (void)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
int flags;
|
|
Packit |
6c4009 |
asm volatile ("frflags %0" : "=r" (flags));
|
|
Packit |
6c4009 |
return flags;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static __always_inline void
|
|
Packit |
6c4009 |
riscv_setflags (int flags)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
asm volatile ("fsflags %z0" : : "rJ" (flags));
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static __always_inline void
|
|
Packit |
6c4009 |
libc_feholdexcept_riscv (fenv_t *envp)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
asm volatile ("csrrc %0, fcsr, %1" : "=r" (*envp) : "i" (FE_ALL_EXCEPT));
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#define libc_feholdexcept libc_feholdexcept_riscv
|
|
Packit |
6c4009 |
#define libc_feholdexceptf libc_feholdexcept_riscv
|
|
Packit |
6c4009 |
#define libc_feholdexceptl libc_feholdexcept_riscv
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static __always_inline void
|
|
Packit |
6c4009 |
libc_fesetround_riscv (int round)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
riscv_setround (round);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#define libc_fesetround libc_fesetround_riscv
|
|
Packit |
6c4009 |
#define libc_fesetroundf libc_fesetround_riscv
|
|
Packit |
6c4009 |
#define libc_fesetroundl libc_fesetround_riscv
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static __always_inline void
|
|
Packit |
6c4009 |
libc_feholdexcept_setround_riscv (fenv_t *envp, int round)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
libc_fesetround_riscv (round);
|
|
Packit |
6c4009 |
libc_feholdexcept_riscv (envp);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#define libc_feholdexcept_setround libc_feholdexcept_setround_riscv
|
|
Packit |
6c4009 |
#define libc_feholdexcept_setroundf libc_feholdexcept_setround_riscv
|
|
Packit |
6c4009 |
#define libc_feholdexcept_setroundl libc_feholdexcept_setround_riscv
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static __always_inline int
|
|
Packit |
6c4009 |
libc_fetestexcept_riscv (int ex)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
return riscv_getflags () & ex;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#define libc_fetestexcept libc_fetestexcept_riscv
|
|
Packit |
6c4009 |
#define libc_fetestexceptf libc_fetestexcept_riscv
|
|
Packit |
6c4009 |
#define libc_fetestexceptl libc_fetestexcept_riscv
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static __always_inline void
|
|
Packit |
6c4009 |
libc_fesetenv_riscv (const fenv_t *envp)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
long int env = (long int) envp - (long int) FE_DFL_ENV;
|
|
Packit |
6c4009 |
if (env != 0)
|
|
Packit |
6c4009 |
env = *envp;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
_FPU_SETCW (env);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#define libc_fesetenv libc_fesetenv_riscv
|
|
Packit |
6c4009 |
#define libc_fesetenvf libc_fesetenv_riscv
|
|
Packit |
6c4009 |
#define libc_fesetenvl libc_fesetenv_riscv
|
|
Packit |
6c4009 |
#define libc_feresetround_noex libc_fesetenv_riscv
|
|
Packit |
6c4009 |
#define libc_feresetround_noexf libc_fesetenv_riscv
|
|
Packit |
6c4009 |
#define libc_feresetround_noexl libc_fesetenv_riscv
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static __always_inline int
|
|
Packit |
6c4009 |
libc_feupdateenv_test_riscv (const fenv_t *envp, int ex)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
fenv_t env = *envp;
|
|
Packit |
6c4009 |
int flags = riscv_getflags ();
|
|
Packit |
6c4009 |
asm volatile ("csrw fcsr, %z0" : : "rJ" (env | flags));
|
|
Packit |
6c4009 |
return flags & ex;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#define libc_feupdateenv_test libc_feupdateenv_test_riscv
|
|
Packit |
6c4009 |
#define libc_feupdateenv_testf libc_feupdateenv_test_riscv
|
|
Packit |
6c4009 |
#define libc_feupdateenv_testl libc_feupdateenv_test_riscv
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static __always_inline void
|
|
Packit |
6c4009 |
libc_feupdateenv_riscv (const fenv_t *envp)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
_FPU_SETCW (*envp | riscv_getflags ());
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#define libc_feupdateenv libc_feupdateenv_riscv
|
|
Packit |
6c4009 |
#define libc_feupdateenvf libc_feupdateenv_riscv
|
|
Packit |
6c4009 |
#define libc_feupdateenvl libc_feupdateenv_riscv
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static __always_inline void
|
|
Packit |
6c4009 |
libc_feholdsetround_riscv (fenv_t *envp, int round)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
/* Note this implementation makes an improperly-formatted fenv_t and
|
|
Packit |
6c4009 |
so should only be used in conjunction with libc_feresetround. */
|
|
Packit |
6c4009 |
int old_round;
|
|
Packit |
6c4009 |
asm volatile ("csrrw %0, frm, %z1" : "=r" (old_round) : "rJ" (round));
|
|
Packit |
6c4009 |
*envp = old_round;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#define libc_feholdsetround libc_feholdsetround_riscv
|
|
Packit |
6c4009 |
#define libc_feholdsetroundf libc_feholdsetround_riscv
|
|
Packit |
6c4009 |
#define libc_feholdsetroundl libc_feholdsetround_riscv
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static __always_inline void
|
|
Packit |
6c4009 |
libc_feresetround_riscv (fenv_t *envp)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
/* Note this implementation takes an improperly-formatted fenv_t and
|
|
Packit |
6c4009 |
so should only be used in conjunction with libc_feholdsetround. */
|
|
Packit |
6c4009 |
riscv_setround (*envp);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#define libc_feresetround libc_feresetround_riscv
|
|
Packit |
6c4009 |
#define libc_feresetroundf libc_feresetround_riscv
|
|
Packit |
6c4009 |
#define libc_feresetroundl libc_feresetround_riscv
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#include_next <math_private.h>
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#endif
|