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Add powerpc-nofpu/e500 support functions for atomic compound assignment and FLT_ROUNDS.

This commit is contained in:
Joseph Myers 2013-11-28 18:01:41 +00:00
parent c5df760908
commit 91a1f3fea0
14 changed files with 371 additions and 4 deletions
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25
ChangeLog
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@ -1,5 +1,30 @@
2013-11-28 Joseph Myers <joseph@codesourcery.com>
* sysdeps/powerpc/nofpu/atomic-feclearexcept.c: New file.
* sysdeps/powerpc/nofpu/atomic-feholdexcept.c: Likewise.
* sysdeps/powerpc/nofpu/atomic-feupdateenv.c: Likewise.
* sysdeps/powerpc/nofpu/flt-rounds.c: Likewise.
* sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feclearexcept.c:
Likewise.
* sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feholdexcept.c:
Likewise.
* sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feupdateenv.c:
Likewise.
* sysdeps/powerpc/powerpc32/e500/nofpu/flt-rounds.c: Likewise.
* sysdeps/powerpc/nofpu/Makefile [$(subdir) = soft-fp]
(sysdep_routines): Add atomic-feholdexcept, atomic-feclearexcept,
atomic-feupdateenv and flt-rounds.
* sysdeps/powerpc/nofpu/Versions (libc): Add
__atomic_feholdexcept, __atomic_feclearexcept,
__atomic_feupdateenv and __flt_rounds to GLIBC_2.19.
* sysdeps/powerpc/powerpc32/e500/nofpu/fenv_libc.h
(__feraiseexcept_soft): Declare and use libc_hidden_proto here.
* sysdeps/powerpc/powerpc32/e500/nofpu/fraiseexcept-soft.c
(__feraiseexcept_soft): Don't declare and use libc_hidden_proto
here.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/nptl/libc.abilist:
Update.
* manual/arith.texi (FP Exceptions): Document that exceptions may
not be raised when matherr is used.
(Math Error Reporting): Document overflow in directed rounding

3
sysdeps/powerpc/nofpu/Makefile
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@ -2,7 +2,8 @@
ifeq ($(subdir),soft-fp)
sysdep_routines += $(gcc-single-routines) $(gcc-double-routines) \
sim-full
sim-full atomic-feholdexcept atomic-feclearexcept \
atomic-feupdateenv flt-rounds
endif
ifeq ($(subdir),math)

4
sysdeps/powerpc/nofpu/Versions
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@ -17,6 +17,10 @@ libc {
__gtdf2; __gtsf2;
__ltdf2; __ltsf2;
}
GLIBC_2.19 {
__atomic_feholdexcept; __atomic_feclearexcept; __atomic_feupdateenv;
__flt_rounds;
}
GLIBC_PRIVATE {
__sim_exceptions_thread;
__sim_disabled_exceptions_thread;

28
sysdeps/powerpc/nofpu/atomic-feclearexcept.c Normal file
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@ -0,0 +1,28 @@
/* Clear floating-point exceptions for atomic compound assignment.
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/>. */
#include "soft-fp.h"
#include "soft-supp.h"
void
__atomic_feclearexcept (void)
{
/* This function postdates the global variables being turned into
compat symbols, so no need to set them. */
__sim_exceptions_thread = 0;
}

38
sysdeps/powerpc/nofpu/atomic-feholdexcept.c Normal file
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@ -0,0 +1,38 @@
/* Store current floating-point environment and clear exceptions for
atomic compound assignment.
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/>. */
#include "soft-fp.h"
#include "soft-supp.h"
void
__atomic_feholdexcept (fenv_t *envp)
{
fenv_union_t u;
u.l[0] = __sim_exceptions_thread;
/* The rounding mode is not changed by arithmetic, so no need to
save it. */
u.l[1] = __sim_disabled_exceptions_thread;
*envp = u.fenv;
/* This function postdates the global variables being turned into
compat symbols, so no need to set them. */
__sim_exceptions_thread = 0;
__sim_disabled_exceptions_thread = FE_ALL_EXCEPT;
}

37
sysdeps/powerpc/nofpu/atomic-feupdateenv.c Normal file
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@ -0,0 +1,37 @@
/* Install given floating-point environment and raise exceptions for
atomic compound assignment.
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/>. */
#include "soft-fp.h"
#include "soft-supp.h"
#include <signal.h>
void
__atomic_feupdateenv (const fenv_t *envp)
{
fenv_union_t u;
int saved_exceptions = __sim_exceptions_thread;
/* This function postdates the global variables being turned into
compat symbols, so no need to set them. */
u.fenv = *envp;
__sim_exceptions_thread |= u.l[0];
__sim_disabled_exceptions_thread = u.l[1];
if (saved_exceptions & ~__sim_disabled_exceptions_thread)
raise (SIGFPE);
}

38
sysdeps/powerpc/nofpu/flt-rounds.c Normal file
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@ -0,0 +1,38 @@
/* Return current rounding mode as correct value for FLT_ROUNDS.
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/>. */
#include "soft-fp.h"
#include "soft-supp.h"
int
__flt_rounds (void)
{
switch (__sim_round_mode_thread)
{
case FP_RND_ZERO:
return 0;
case FP_RND_NEAREST:
return 1;
case FP_RND_PINF:
return 2;
case FP_RND_MINF:
return 3;
default:
abort ();
}
}

50
sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feclearexcept.c Normal file
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@ -0,0 +1,50 @@
/* Clear floating-point exceptions for atomic compound assignment.
e500 version.
Copyright (C) 2004-2013 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/>. */
#include <fenv_libc.h>
#include <stdlib.h>
#include <sysdep.h>
#include <sys/prctl.h>
void
__atomic_feclearexcept (void)
{
unsigned int fpescr, old_fpescr;
/* Get the current state. */
old_fpescr = fpescr = fegetenv_register ();
/* Clear the relevant bits. */
fpescr &= ~SPEFSCR_ALL_EXCEPT;
/* Put the new state in effect. */
fesetenv_register (fpescr);
/* Let the kernel know if the "invalid" or "underflow" bit was
cleared. */
if (old_fpescr & (SPEFSCR_FINVS | SPEFSCR_FUNFS))
{
int pflags __attribute__ ((__unused__)), r;
INTERNAL_SYSCALL_DECL (err);
r = INTERNAL_SYSCALL (prctl, err, 2, PR_GET_FPEXC, &pflags);
if (INTERNAL_SYSCALL_ERROR_P (r, err))
abort ();
}
}

55
sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feholdexcept.c Normal file
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@ -0,0 +1,55 @@
/* Store current floating-point environment and clear exceptions for
atomic compound assignment. e500 version.
Copyright (C) 2004-2013 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/>. */
#include <fenv_libc.h>
#include <stdlib.h>
#include <sysdep.h>
#include <sys/prctl.h>
void
__atomic_feholdexcept (fenv_t *envp)
{
fenv_union_t u;
INTERNAL_SYSCALL_DECL (err);
int r;
/* Get the current state. */
r = INTERNAL_SYSCALL (prctl, err, 2, PR_GET_FPEXC, &u.l[0]);
if (INTERNAL_SYSCALL_ERROR_P (r, err))
abort ();
u.l[1] = fegetenv_register ();
*envp = u.fenv;
/* Clear everything except for the rounding mode and trapping to the
kernel. */
u.l[0] &= ~(PR_FP_EXC_DIV
| PR_FP_EXC_OVF
| PR_FP_EXC_UND
| PR_FP_EXC_RES
| PR_FP_EXC_INV);
u.l[1] &= SPEFSCR_FRMC | (SPEFSCR_ALL_EXCEPT_ENABLE & ~SPEFSCR_FINXE);
/* Put the new state in effect. */
fesetenv_register (u.l[1]);
r = INTERNAL_SYSCALL (prctl, err, 2, PR_SET_FPEXC,
u.l[0] | PR_FP_EXC_SW_ENABLE);
if (INTERNAL_SYSCALL_ERROR_P (r, err))
abort ();
}

46
sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feupdateenv.c Normal file
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@ -0,0 +1,46 @@
/* Install given floating-point environment and raise exceptions for
atomic compound assignment. e500 version.
Copyright (C) 2004-2013 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/>. */
#include <fenv_libc.h>
#include <stdlib.h>
#include <sysdep.h>
#include <sys/prctl.h>
void
__atomic_feupdateenv (const fenv_t *envp)
{
int exc;
fenv_union_t u;
INTERNAL_SYSCALL_DECL (err);
int r;
/* Save the currently set exceptions. */
exc = fegetenv_register () & SPEFSCR_ALL_EXCEPT;
u.fenv = *envp;
fesetenv_register (u.l[1]);
r = INTERNAL_SYSCALL (prctl, err, 2, PR_SET_FPEXC,
u.l[0] | PR_FP_EXC_SW_ENABLE);
if (INTERNAL_SYSCALL_ERROR_P (r, err))
abort ();
/* Raise (if appropriate) saved exceptions. */
__feraiseexcept_soft (exc);
}

3
sysdeps/powerpc/powerpc32/e500/nofpu/fenv_libc.h
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@ -27,6 +27,9 @@
int __feraiseexcept_spe (int);
libm_hidden_proto (__feraiseexcept_spe)
int __feraiseexcept_soft (int);
libc_hidden_proto (__feraiseexcept_soft)
int __fexcepts_to_spe (int);
libm_hidden_proto (__fexcepts_to_spe)

39
sysdeps/powerpc/powerpc32/e500/nofpu/flt-rounds.c Normal file
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@ -0,0 +1,39 @@
/* Return current rounding mode as correct value for FLT_ROUNDS. e500
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/>. */
#include <fenv_libc.h>
#include <stdlib.h>
int
__flt_rounds (void)
{
switch (fegetenv_register () & SPEFSCR_FRMC)
{
case FE_TOWARDZERO:
return 0;
case FE_TONEAREST:
return 1;
case FE_UPWARD:
return 2;
case FE_DOWNWARD:
return 3;
default:
abort ();
}
}

3
sysdeps/powerpc/powerpc32/e500/nofpu/fraiseexcept-soft.c
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@ -20,9 +20,6 @@
#include <fenv_libc.h>
#include <libc-symbols.h>
int __feraiseexcept_soft (int);
libc_hidden_proto (__feraiseexcept_soft)
#define __FERAISEEXCEPT_INTERNAL __feraiseexcept_soft
#include "spe-raise.c"
libc_hidden_def (__feraiseexcept_soft)

6
sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/nptl/libc.abilist
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@ -1784,6 +1784,12 @@ GLIBC_2.17
GLIBC_2.18
GLIBC_2.18 A
__cxa_thread_atexit_impl F
GLIBC_2.19
GLIBC_2.19 A
__atomic_feclearexcept F
__atomic_feholdexcept F
__atomic_feupdateenv F
__flt_rounds F
GLIBC_2.2
GLIBC_2.2 A
_IO_adjust_wcolumn F