mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-23 11:20:07 +00:00
e59c94fa0e
If a platform does not define "long-double-fcts = yes" in its Makefiles and it does define __NO_LONG_DOUBLE_MATH in its installed headers, it will currently create exported symbols for __finitel, __isinfl, and __isnanl that can't be reached from userspace by correct use of the finite(), isinf(), or isnan() macros in <math.h>. To avoid this situation, by default for such platforms we now no longer export these symbols, thus causing appropriate link-time errors. However, for platforms that previously exported these symbols, we continue to do so as compat symbols; this is enabled by adding LDBL_CLASSIFY_COMPAT to math_private.h for the platform. For tile, remove the now-unnecessary exports of those functions from libc and libm.
258 lines
7.5 KiB
C
258 lines
7.5 KiB
C
/* Internal math stuff. MIPS version.
|
|
Copyright (C) 2013-2015 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 MIPS_MATH_PRIVATE_H
|
|
#define MIPS_MATH_PRIVATE_H 1
|
|
|
|
#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>
|
|
|
|
# define _FPU_MASK_ALL (_FPU_MASK_V | _FPU_MASK_Z | _FPU_MASK_O \
|
|
|_FPU_MASK_U | _FPU_MASK_I | FE_ALL_EXCEPT)
|
|
|
|
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_ALL);
|
|
_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_ALL);
|
|
|
|
/* 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
|
|
|
|
# define libc_feholdsetround libc_feholdexcept_setround_mips
|
|
# define libc_feholdsetroundf libc_feholdexcept_setround_mips
|
|
# define libc_feholdsetroundl libc_feholdexcept_setround_mips
|
|
|
|
static __always_inline void
|
|
libc_fesetenv_mips (fenv_t *envp)
|
|
{
|
|
fpu_control_t cw __attribute__ ((unused));
|
|
|
|
/* 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 int
|
|
libc_feupdateenv_test_mips (fenv_t *envp, int excepts)
|
|
{
|
|
/* int ret = fetestexcept (excepts); feupdateenv (envp); return ret; */
|
|
int cw, temp;
|
|
|
|
/* Get current control word. */
|
|
_FPU_GETCW (cw);
|
|
|
|
/* 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 = cw & FE_ALL_EXCEPT;
|
|
temp |= envp->__fp_control_register | (temp << CAUSE_SHIFT);
|
|
|
|
/* Set new state. */
|
|
_FPU_SETCW (temp);
|
|
|
|
return cw & excepts & FE_ALL_EXCEPT;
|
|
}
|
|
# define libc_feupdateenv_test libc_feupdateenv_test_mips
|
|
# define libc_feupdateenv_testf libc_feupdateenv_test_mips
|
|
# define libc_feupdateenv_testl libc_feupdateenv_test_mips
|
|
|
|
static __always_inline void
|
|
libc_feupdateenv_mips (fenv_t *envp)
|
|
{
|
|
libc_feupdateenv_test_mips (envp, 0);
|
|
}
|
|
# define libc_feupdateenv libc_feupdateenv_mips
|
|
# define libc_feupdateenvf libc_feupdateenv_mips
|
|
# define libc_feupdateenvl libc_feupdateenv_mips
|
|
|
|
# define libc_feresetround libc_feupdateenv_mips
|
|
# define libc_feresetroundf libc_feupdateenv_mips
|
|
# define libc_feresetroundl libc_feupdateenv_mips
|
|
|
|
static __always_inline int
|
|
libc_fetestexcept_mips (int excepts)
|
|
{
|
|
int cw;
|
|
|
|
/* Get current control word. */
|
|
_FPU_GETCW (cw);
|
|
|
|
return cw & excepts & FE_ALL_EXCEPT;
|
|
}
|
|
# define libc_fetestexcept libc_fetestexcept_mips
|
|
# define libc_fetestexceptf libc_fetestexcept_mips
|
|
# define libc_fetestexceptl libc_fetestexcept_mips
|
|
|
|
/* Enable support for rounding mode context. */
|
|
# define HAVE_RM_CTX 1
|
|
|
|
static __always_inline void
|
|
libc_feholdexcept_setround_mips_ctx (struct rm_ctx *ctx, int round)
|
|
{
|
|
fpu_control_t old, new;
|
|
|
|
/* Save the current state. */
|
|
_FPU_GETCW (old);
|
|
ctx->env.__fp_control_register = old;
|
|
|
|
/* Clear all exception enable bits and flags. */
|
|
new = old & ~(_FPU_MASK_ALL);
|
|
|
|
/* Set rounding bits. */
|
|
new = (new & ~_FPU_RC_MASK) | round;
|
|
|
|
if (__glibc_unlikely (new != old))
|
|
{
|
|
_FPU_SETCW (new);
|
|
ctx->updated_status = true;
|
|
}
|
|
else
|
|
ctx->updated_status = false;
|
|
}
|
|
# define libc_feholdexcept_setround_ctx libc_feholdexcept_setround_mips_ctx
|
|
# define libc_feholdexcept_setroundf_ctx libc_feholdexcept_setround_mips_ctx
|
|
# define libc_feholdexcept_setroundl_ctx libc_feholdexcept_setround_mips_ctx
|
|
|
|
static __always_inline void
|
|
libc_fesetenv_mips_ctx (struct rm_ctx *ctx)
|
|
{
|
|
libc_fesetenv_mips (&ctx->env);
|
|
}
|
|
# define libc_fesetenv_ctx libc_fesetenv_mips_ctx
|
|
# define libc_fesetenvf_ctx libc_fesetenv_mips_ctx
|
|
# define libc_fesetenvl_ctx libc_fesetenv_mips_ctx
|
|
|
|
static __always_inline void
|
|
libc_feupdateenv_mips_ctx (struct rm_ctx *ctx)
|
|
{
|
|
if (__glibc_unlikely (ctx->updated_status))
|
|
libc_feupdateenv_test_mips (&ctx->env, 0);
|
|
}
|
|
# define libc_feupdateenv_ctx libc_feupdateenv_mips_ctx
|
|
# define libc_feupdateenvf_ctx libc_feupdateenv_mips_ctx
|
|
# define libc_feupdateenvl_ctx libc_feupdateenv_mips_ctx
|
|
# define libc_feresetround_ctx libc_feupdateenv_mips_ctx
|
|
# define libc_feresetroundf_ctx libc_feupdateenv_mips_ctx
|
|
# define libc_feresetroundl_ctx libc_feupdateenv_mips_ctx
|
|
|
|
static __always_inline void
|
|
libc_feholdsetround_mips_ctx (struct rm_ctx *ctx, int round)
|
|
{
|
|
fpu_control_t old, new;
|
|
|
|
/* Save the current state. */
|
|
_FPU_GETCW (old);
|
|
ctx->env.__fp_control_register = old;
|
|
|
|
/* Set rounding bits. */
|
|
new = (old & ~_FPU_RC_MASK) | round;
|
|
|
|
if (__glibc_unlikely (new != old))
|
|
{
|
|
_FPU_SETCW (new);
|
|
ctx->updated_status = true;
|
|
}
|
|
else
|
|
ctx->updated_status = false;
|
|
}
|
|
# define libc_feholdsetround_ctx libc_feholdsetround_mips_ctx
|
|
# define libc_feholdsetroundf_ctx libc_feholdsetround_mips_ctx
|
|
# define libc_feholdsetroundl_ctx libc_feholdsetround_mips_ctx
|
|
|
|
#endif
|
|
|
|
/* Enable __finitel, __isinfl, and __isnanl for binary compatibility
|
|
when built without long double support. */
|
|
#define LDBL_CLASSIFY_COMPAT 1
|
|
|
|
#include_next <math_private.h>
|
|
|
|
#endif
|