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* sysdeps/alpha/fpu/fraiseexcpt.c: Remove file. * sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_IEEE_RAISE_EXCEPTION): New. * sysdeps/unix/sysv/linux/alpha/fraiseexcpt.c: New file. * sysdeps/unix/sysv/linux/alpha/kernel_sysinfo.h: New file. * sysdeps/unix/sysv/linux/alpha/ieee_get_fp_control.S: Use it. * sysdeps/unix/sysv/linux/alpha/ieee_set_fp_control.S: Likewise.

Browse Source 
* sysdeps/alpha/fpu/fraiseexcpt.c: Remove file.
	* sysdeps/unix/sysv/linux/kernel-features.h
	(__ASSUME_IEEE_RAISE_EXCEPTION): New.
	* sysdeps/unix/sysv/linux/alpha/fraiseexcpt.c: New file.
	* sysdeps/unix/sysv/linux/alpha/kernel_sysinfo.h: New file.
	* sysdeps/unix/sysv/linux/alpha/ieee_get_fp_control.S: Use it.
	* sysdeps/unix/sysv/linux/alpha/ieee_set_fp_control.S: Likewise.

2004-09-05  Richard Henderson  <rth@redhat.com>
This commit is contained in:
Richard Henderson 2004-09-06 02:19:36 +00:00
parent febcd83655
commit 6029b952a6
7 changed files with 118 additions and 52 deletions
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10
ChangeLog
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@ -1,3 +1,13 @@
2004-09-05 Richard Henderson <rth@redhat.com>
* sysdeps/alpha/fpu/fraiseexcpt.c: Remove file.
* sysdeps/unix/sysv/linux/kernel-features.h
(__ASSUME_IEEE_RAISE_EXCEPTION): New.
* sysdeps/unix/sysv/linux/alpha/fraiseexcpt.c: New file.
* sysdeps/unix/sysv/linux/alpha/kernel_sysinfo.h: New file.
* sysdeps/unix/sysv/linux/alpha/ieee_get_fp_control.S: Use it.
* sysdeps/unix/sysv/linux/alpha/ieee_set_fp_control.S: Likewise.
2004-09-05 Richard Henderson <rth@redhat.com> 2004-09-05 Richard Henderson <rth@redhat.com>
* sysdeps/alpha/div.S: Save and restore FPCR around fp operations. * sysdeps/alpha/div.S: Save and restore FPCR around fp operations.

48
sysdeps/alpha/fpu/fraiseexcpt.c
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@ -1,48 +0,0 @@
/* Raise given exceptions.
Copyright (C) 1997,98,99,2000,01,02 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Richard Henderson <rth@tamu.edu>, 1997.
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <fenv_libc.h>
int
__feraiseexcept (int excepts)
{
unsigned long int tmp;
/* Get the current exception state. */
tmp = __ieee_get_fp_control ();
/* Set all the bits that were called for. */
tmp |= (excepts & SWCR_STATUS_MASK);
/* And store it back. */
__ieee_set_fp_control (tmp);
/* Success. */
return 0;
}
#include <shlib-compat.h>
#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
strong_alias (__feraiseexcept, __old_feraiseexcept)
compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1);
#endif
libm_hidden_ver (__feraiseexcept, feraiseexcept)
versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2);

92
sysdeps/unix/sysv/linux/alpha/fraiseexcpt.c Normal file
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@ -0,0 +1,92 @@
/* Copyright (C) 2004 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <fenv_libc.h>
#include <sysdep.h>
#include <float.h>
#include "kernel-features.h"
#include "kernel_sysinfo.h"
int
__feraiseexcept (int excepts)
{
INTERNAL_SYSCALL_DECL (err);
unsigned long t = excepts;
long r;
r = INTERNAL_SYSCALL (osf_setsysinfo, err, 2, SSI_IEEE_RAISE_EXCEPTION, &t);
#ifndef __ASSUME_IEEE_RAISE_EXCEPTION
if (!INTERNAL_SYSCALL_ERROR_P (r, err))
return 0;
double d;
/* If we got an error from SSI_IEEE_RAISE_EXCEPTION, assume it means that
the system call isn't actually implemented. Do the best we can. */
/* Invalid implemented with 0 / 0 -> NaN. */
if (excepts & FE_INVALID)
__asm__ __volatile__ ("divs/su $f31,$f31,%0; trapb" : "=f"(d) : );
/* Division By Zero implemented with 1 / 0 -> NaN. */
if (excepts & FE_DIVBYZERO)
__asm__ __volatile__ ("divs/su %1,$f31,%0; trapb" : "=&f"(d) : "f"(1.0f));
/* Overflow and underflow cannot be had all by themselves. We can
generate them with arithmetic, but we always get INEXACT raised
at the same time. Prepare to undo. */
if ((excepts & (FE_OVERFLOW | FE_UNDERFLOW)) && !(excepts & FE_INEXACT))
INTERNAL_SYSCALL (osf_getsysinfo, err, 2, GSI_IEEE_FP_CONTROL, &t);
/* Overflow implemented with FLT_MAX + FLT_MAX -> Inf. */
if (excepts & FE_OVERFLOW)
__asm__ __volatile__ ("adds/sui %1,%1,%0; trapb"
: "=&f"(d) : "f"(FLT_MAX));
/* Underflow implemented with FLT_MIN * FLT_MIN -> 0. */
if (excepts & FE_UNDERFLOW)
__asm__ __volatile__ ("muls/sui %1,%1,%0; trapb"
: "=&f"(d) : "f"(FLT_MIN));
/* Inexact implemented with (long)0.5 -> 0. */
if ((excepts & (FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT)) == FE_INEXACT)
__asm__ __volatile__ ("cvttq/svi %1,%0; trapb" : "=&f"(d) : "f"(0.5f));
/* If we raised inexact when not asked, and inexact was not previously
raised, then clear that exception. */
if ((excepts & (FE_OVERFLOW | FE_UNDERFLOW))
&& !((excepts | t) & FE_INEXACT))
{
t |= excepts & SWCR_STATUS_MASK;
INTERNAL_SYSCALL (osf_setsysinfo, err, 2, SSI_IEEE_FP_CONTROL, &t);
}
#endif /* !__ASSUME_IEEE_RAISE_EXCEPTION */
return 0;
}
#include <shlib-compat.h>
#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
strong_alias (__feraiseexcept, __old_feraiseexcept)
compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1);
#endif
libm_hidden_ver (__feraiseexcept, feraiseexcept)
versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2);

4
sysdeps/unix/sysv/linux/alpha/ieee_get_fp_control.S
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@ -1,4 +1,4 @@
/* Copyright (C) 1993, 1995, 1996, 2003 Free Software Foundation, Inc. /* Copyright (C) 1993, 1995, 1996, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library. This file is part of the GNU C Library.
Contributed by David Mosberger <davidm@azstarnet.com>, 1995. Contributed by David Mosberger <davidm@azstarnet.com>, 1995.
@ -18,8 +18,8 @@
02111-1307 USA. */ 02111-1307 USA. */
#include <sysdep.h> #include <sysdep.h>
#include "kernel_sysinfo.h"
#define GSI_IEEE_FP_CONTROL 45
.text .text

5
sysdeps/unix/sysv/linux/alpha/ieee_set_fp_control.S
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@ -1,4 +1,5 @@
/* Copyright (C) 1993, 1995, 1996, 1997, 2003 Free Software Foundation, Inc. /* Copyright (C) 1993, 1995, 1996, 1997, 2003, 2004
Free Software Foundation, Inc.
This file is part of the GNU C Library. This file is part of the GNU C Library.
Contributed by David Mosberger <davidm@azstarnet.com>, 1995. Contributed by David Mosberger <davidm@azstarnet.com>, 1995.
@ -18,8 +19,8 @@
02111-1307 USA. */ 02111-1307 USA. */
#include <sysdep.h> #include <sysdep.h>
#include "kernel_sysinfo.h"
#define SSI_IEEE_FP_CONTROL 14
LEAF(__ieee_set_fp_control, 16) LEAF(__ieee_set_fp_control, 16)
#ifdef PROF #ifdef PROF

6
sysdeps/unix/sysv/linux/alpha/kernel_sysinfo.h Normal file
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@ -0,0 +1,6 @@
/* A copy of the couple of bits we need from <asm/sysinfo.h>. */
#define GSI_IEEE_FP_CONTROL 45
#define SSI_IEEE_FP_CONTROL 14
#define SSI_IEEE_RAISE_EXCEPTION 1001

5
sysdeps/unix/sysv/linux/kernel-features.h
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@ -411,3 +411,8 @@
#if __LINUX_KERNEL_VERSION >= 0x020609 #if __LINUX_KERNEL_VERSION >= 0x020609
# define __ASSUME_WAITID_SYSCALL 1 # define __ASSUME_WAITID_SYSCALL 1
#endif #endif
/* Starting with version 2.6.9, SSI_IEEE_RAISE_EXCEPTION exists. */
#if __LINUX_KERNEL_VERSION >= 0x020609 && defined __alpha__
#define __ASSUME_IEEE_RAISE_EXCEPTION 1
#endif