mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-15 04:20:28 +08:00
04277e02d7
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
281 lines
7.4 KiB
C
281 lines
7.4 KiB
C
/* Private floating point rounding and exceptions handling. C-SKY version.
|
|
Copyright (C) 2018-2019 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 CSKY_FENV_PRIVATE_H
|
|
#define CSKY_FENV_PRIVATE_H 1
|
|
|
|
#include <fenv.h>
|
|
#include <fpu_control.h>
|
|
#include <fenv_libc.h>
|
|
|
|
static __always_inline void
|
|
libc_feholdexcept_vfp (fenv_t *envp)
|
|
{
|
|
fpu_control_t fpsr, fpcr;
|
|
|
|
_FPU_GETCW (fpcr);
|
|
envp->__fpcr = fpcr;
|
|
|
|
_FPU_GETFPSR (fpsr);
|
|
envp->__fpsr = fpsr;
|
|
|
|
/* Now set all exceptions to non-stop. */
|
|
fpcr &= ~FE_ALL_EXCEPT;
|
|
|
|
/* And clear all exception flags. */
|
|
fpsr &= ~(FE_ALL_EXCEPT << CAUSE_SHIFT);
|
|
|
|
_FPU_SETFPSR (fpsr);
|
|
|
|
_FPU_SETCW (fpcr);
|
|
}
|
|
|
|
static __always_inline void
|
|
libc_fesetround_vfp (int round)
|
|
{
|
|
fpu_control_t fpcr;
|
|
|
|
_FPU_GETCW (fpcr);
|
|
|
|
/* Set new rounding mode if different. */
|
|
if (__glibc_unlikely ((fpcr & FE_DOWNWARD) != round))
|
|
_FPU_SETCW ((fpcr & ~FE_DOWNWARD) | round);
|
|
}
|
|
|
|
static __always_inline void
|
|
libc_feholdexcept_setround_vfp (fenv_t *envp, int round)
|
|
{
|
|
fpu_control_t fpsr, fpcr;
|
|
|
|
_FPU_GETCW (fpcr);
|
|
envp->__fpcr = fpcr;
|
|
|
|
_FPU_GETFPSR (fpsr);
|
|
envp->__fpsr = fpsr;
|
|
|
|
/* Clear exception flags, set all exceptions to non-stop,
|
|
and set new rounding mode. */
|
|
fpsr &= ~(FE_ALL_EXCEPT << CAUSE_SHIFT);
|
|
_FPU_SETFPSR (fpsr);
|
|
|
|
fpcr &= ~(FE_ALL_EXCEPT | FE_DOWNWARD);
|
|
_FPU_SETCW (fpcr | round);
|
|
}
|
|
|
|
static __always_inline void
|
|
libc_feholdsetround_vfp (fenv_t *envp, int round)
|
|
{
|
|
fpu_control_t fpcr;
|
|
|
|
_FPU_GETCW (fpcr);
|
|
envp->__fpcr = fpcr;
|
|
|
|
/* Set new rounding mode if different. */
|
|
if (__glibc_unlikely ((fpcr & FE_DOWNWARD) != round))
|
|
_FPU_SETCW ((fpcr & ~FE_DOWNWARD) | round);
|
|
}
|
|
|
|
static __always_inline void
|
|
libc_feresetround_vfp (fenv_t *envp)
|
|
{
|
|
fpu_control_t fpcr, round;
|
|
|
|
_FPU_GETCW (fpcr);
|
|
|
|
/* Check whether rounding modes are different. */
|
|
round = (envp->__fpcr ^ fpcr) & FE_DOWNWARD;
|
|
|
|
/* Restore the rounding mode if it was changed. */
|
|
if (__glibc_unlikely (round != 0))
|
|
_FPU_SETCW (fpcr ^ round);
|
|
}
|
|
|
|
static __always_inline int
|
|
libc_fetestexcept_vfp (int ex)
|
|
{
|
|
fpu_control_t fpsr;
|
|
|
|
_FPU_GETFPSR (fpsr);
|
|
fpsr = fpsr >> CAUSE_SHIFT;
|
|
return fpsr & ex & FE_ALL_EXCEPT;
|
|
}
|
|
|
|
static __always_inline void
|
|
libc_fesetenv_vfp (const fenv_t *envp)
|
|
{
|
|
fpu_control_t fpcr, fpsr, new_fpcr, new_fpsr;
|
|
|
|
_FPU_GETCW (fpcr);
|
|
_FPU_GETFPSR (fpsr);
|
|
|
|
new_fpcr = envp->__fpcr;
|
|
new_fpsr = envp->__fpsr;
|
|
|
|
if (__glibc_unlikely (fpsr ^ new_fpsr) != 0)
|
|
_FPU_SETFPSR (new_fpsr);
|
|
|
|
if (__glibc_unlikely (fpcr ^ new_fpcr) != 0)
|
|
_FPU_SETCW (new_fpcr);
|
|
}
|
|
|
|
static __always_inline int
|
|
libc_feupdateenv_test_vfp (const fenv_t *envp, int ex)
|
|
{
|
|
fpu_control_t fpcr, fpsr, new_fpcr, new_fpsr, excepts;
|
|
|
|
_FPU_GETCW (fpcr);
|
|
_FPU_GETFPSR (fpsr);
|
|
|
|
/* Merge current exception flags with the saved fenv. */
|
|
excepts = (fpsr >> CAUSE_SHIFT) & FE_ALL_EXCEPT;
|
|
new_fpcr = envp->__fpcr;
|
|
new_fpsr = envp->__fpsr | (excepts << CAUSE_SHIFT);
|
|
|
|
/* Write FCR and FESR if different. */
|
|
if (__glibc_unlikely (fpsr ^ new_fpsr) != 0)
|
|
_FPU_SETFPSR (new_fpsr);
|
|
|
|
if (__glibc_unlikely (fpcr ^ new_fpcr) != 0)
|
|
_FPU_SETCW (new_fpcr);
|
|
|
|
/* Raise the exceptions if enabled in the new FP state. */
|
|
if (__glibc_unlikely (excepts & new_fpcr))
|
|
__feraiseexcept (excepts);
|
|
|
|
return excepts & ex;
|
|
}
|
|
|
|
static __always_inline void
|
|
libc_feupdateenv_vfp (const fenv_t *envp)
|
|
{
|
|
libc_feupdateenv_test_vfp (envp, 0);
|
|
}
|
|
|
|
static __always_inline void
|
|
libc_feholdsetround_vfp_ctx (struct rm_ctx *ctx, int r)
|
|
{
|
|
fpu_control_t fpcr, fpsr, round;
|
|
|
|
_FPU_GETCW (fpcr);
|
|
_FPU_GETFPSR (fpsr);
|
|
ctx->updated_status = false;
|
|
ctx->env.__fpcr = fpcr;
|
|
ctx->env.__fpsr = fpsr;
|
|
|
|
/* Check whether rounding modes are different. */
|
|
round = (fpcr ^ r) & FE_DOWNWARD;
|
|
|
|
/* Set the rounding mode if changed. */
|
|
if (__glibc_unlikely (round != 0))
|
|
{
|
|
ctx->updated_status = true;
|
|
_FPU_SETCW (fpcr ^ round);
|
|
}
|
|
}
|
|
|
|
static __always_inline void
|
|
libc_feresetround_vfp_ctx (struct rm_ctx *ctx)
|
|
{
|
|
/* Restore the rounding mode if updated. */
|
|
if (__glibc_unlikely (ctx->updated_status))
|
|
{
|
|
fpu_control_t fpcr;
|
|
|
|
_FPU_GETCW (fpcr);
|
|
fpcr = (fpcr & ~FE_DOWNWARD) | (ctx->env.__fpcr & FE_DOWNWARD);
|
|
_FPU_SETCW (fpcr);
|
|
}
|
|
}
|
|
|
|
static __always_inline void
|
|
libc_fesetenv_vfp_ctx (struct rm_ctx *ctx)
|
|
{
|
|
fpu_control_t fpcr, fpsr, new_fpcr, new_fpsr;
|
|
|
|
_FPU_GETCW (fpcr);
|
|
_FPU_GETFPSR (fpsr);
|
|
|
|
new_fpcr = ctx->env.__fpcr;
|
|
new_fpsr = ctx->env.__fpsr;
|
|
|
|
if (__glibc_unlikely (fpsr ^ new_fpsr) != 0)
|
|
_FPU_SETFPSR (new_fpsr);
|
|
|
|
if (__glibc_unlikely (fpcr ^ new_fpcr) != 0)
|
|
_FPU_SETCW (new_fpcr);
|
|
}
|
|
|
|
#define libc_feholdexcept libc_feholdexcept_vfp
|
|
#define libc_feholdexceptf libc_feholdexcept_vfp
|
|
#define libc_feholdexceptl libc_feholdexcept_vfp
|
|
|
|
#define libc_fesetround libc_fesetround_vfp
|
|
#define libc_fesetroundf libc_fesetround_vfp
|
|
#define libc_fesetroundl libc_fesetround_vfp
|
|
|
|
#define libc_feresetround libc_feresetround_vfp
|
|
#define libc_feresetroundf libc_feresetround_vfp
|
|
#define libc_feresetroundl libc_feresetround_vfp
|
|
|
|
#define libc_feresetround_noex libc_fesetenv_vfp
|
|
#define libc_feresetround_noexf libc_fesetenv_vfp
|
|
#define libc_feresetround_noexl libc_fesetenv_vfp
|
|
|
|
#define libc_feholdexcept_setround libc_feholdexcept_setround_vfp
|
|
#define libc_feholdexcept_setroundf libc_feholdexcept_setround_vfp
|
|
#define libc_feholdexcept_setroundl libc_feholdexcept_setround_vfp
|
|
|
|
#define libc_feholdsetround libc_feholdsetround_vfp
|
|
#define libc_feholdsetroundf libc_feholdsetround_vfp
|
|
#define libc_feholdsetroundl libc_feholdsetround_vfp
|
|
|
|
#define libc_fetestexcept libc_fetestexcept_vfp
|
|
#define libc_fetestexceptf libc_fetestexcept_vfp
|
|
#define libc_fetestexceptl libc_fetestexcept_vfp
|
|
|
|
#define libc_fesetenv libc_fesetenv_vfp
|
|
#define libc_fesetenvf libc_fesetenv_vfp
|
|
#define libc_fesetenvl libc_fesetenv_vfp
|
|
|
|
#define libc_feupdateenv libc_feupdateenv_vfp
|
|
#define libc_feupdateenvf libc_feupdateenv_vfp
|
|
#define libc_feupdateenvl libc_feupdateenv_vfp
|
|
|
|
#define libc_feupdateenv_test libc_feupdateenv_test_vfp
|
|
#define libc_feupdateenv_testf libc_feupdateenv_test_vfp
|
|
#define libc_feupdateenv_testl libc_feupdateenv_test_vfp
|
|
|
|
/* We have support for rounding mode context. */
|
|
#define HAVE_RM_CTX 1
|
|
|
|
#define libc_feholdsetround_ctx libc_feholdsetround_vfp_ctx
|
|
#define libc_feresetround_ctx libc_feresetround_vfp_ctx
|
|
#define libc_feresetround_noex_ctx libc_fesetenv_vfp_ctx
|
|
|
|
#define libc_feholdsetroundf_ctx libc_feholdsetround_vfp_ctx
|
|
#define libc_feresetroundf_ctx libc_feresetround_vfp_ctx
|
|
#define libc_feresetround_noexf_ctx libc_fesetenv_vfp_ctx
|
|
|
|
#define libc_feholdsetroundl_ctx libc_feholdsetround_vfp_ctx
|
|
#define libc_feresetroundl_ctx libc_feresetround_vfp_ctx
|
|
#define libc_feresetround_noexl_ctx libc_fesetenv_vfp_ctx
|
|
|
|
#include_next <fenv_private.h>
|
|
|
|
#endif /* CSKY_FENV_PRIVATE_H */
|