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authorRichard Henderson <rth@redhat.com>2004-09-06 02:19:36 +0000
committerRichard Henderson <rth@redhat.com>2004-09-06 02:19:36 +0000
commit6029b952a671027cceb9e158ab2e91f7714caf7e (patch)
treeeb917f8458f4e5fb26ff63e755f4d103c70628dc
parentfebcd83655138bcb01b2680e170e6773a1ec813c (diff)
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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.
* 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>
-rw-r--r--ChangeLog10
-rw-r--r--sysdeps/alpha/fpu/fraiseexcpt.c48
-rw-r--r--sysdeps/unix/sysv/linux/alpha/fraiseexcpt.c92
-rw-r--r--sysdeps/unix/sysv/linux/alpha/ieee_get_fp_control.S4
-rw-r--r--sysdeps/unix/sysv/linux/alpha/ieee_set_fp_control.S5
-rw-r--r--sysdeps/unix/sysv/linux/alpha/kernel_sysinfo.h6
-rw-r--r--sysdeps/unix/sysv/linux/kernel-features.h5
7 files changed, 118 insertions, 52 deletions
diff --git a/ChangeLog b/ChangeLog
index 493273738e..a026a269fb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,15 @@
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>
+
* sysdeps/alpha/div.S: Save and restore FPCR around fp operations.
* sysdeps/alpha/divl.S, sysdeps/alpha/divq.S, sysdeps/alpha/divqu.S,
sysdeps/alpha/ldiv.S, sysdeps/alpha/reml.S, sysdeps/alpha/remq.S,
diff --git a/sysdeps/alpha/fpu/fraiseexcpt.c b/sysdeps/alpha/fpu/fraiseexcpt.c
deleted file mode 100644
index 7a589e4598..0000000000
--- a/sysdeps/alpha/fpu/fraiseexcpt.c
+++ /dev/null
@@ -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);
diff --git a/sysdeps/unix/sysv/linux/alpha/fraiseexcpt.c b/sysdeps/unix/sysv/linux/alpha/fraiseexcpt.c
new file mode 100644
index 0000000000..07f055886e
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/alpha/fraiseexcpt.c
@@ -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);
diff --git a/sysdeps/unix/sysv/linux/alpha/ieee_get_fp_control.S b/sysdeps/unix/sysv/linux/alpha/ieee_get_fp_control.S
index 3cabd0b489..4779f175e5 100644
--- a/sysdeps/unix/sysv/linux/alpha/ieee_get_fp_control.S
+++ b/sysdeps/unix/sysv/linux/alpha/ieee_get_fp_control.S
@@ -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.
Contributed by David Mosberger <davidm@azstarnet.com>, 1995.
@@ -18,8 +18,8 @@
02111-1307 USA. */
#include <sysdep.h>
+#include "kernel_sysinfo.h"
-#define GSI_IEEE_FP_CONTROL 45
.text
diff --git a/sysdeps/unix/sysv/linux/alpha/ieee_set_fp_control.S b/sysdeps/unix/sysv/linux/alpha/ieee_set_fp_control.S
index 302ed06cd3..a9c0891aae 100644
--- a/sysdeps/unix/sysv/linux/alpha/ieee_set_fp_control.S
+++ b/sysdeps/unix/sysv/linux/alpha/ieee_set_fp_control.S
@@ -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.
Contributed by David Mosberger <davidm@azstarnet.com>, 1995.
@@ -18,8 +19,8 @@
02111-1307 USA. */
#include <sysdep.h>
+#include "kernel_sysinfo.h"
-#define SSI_IEEE_FP_CONTROL 14
LEAF(__ieee_set_fp_control, 16)
#ifdef PROF
diff --git a/sysdeps/unix/sysv/linux/alpha/kernel_sysinfo.h b/sysdeps/unix/sysv/linux/alpha/kernel_sysinfo.h
new file mode 100644
index 0000000000..a3edec2269
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/alpha/kernel_sysinfo.h
@@ -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
diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h
index 2a84f1502a..d08c91c2f7 100644
--- a/sysdeps/unix/sysv/linux/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/kernel-features.h
@@ -411,3 +411,8 @@
#if __LINUX_KERNEL_VERSION >= 0x020609
# define __ASSUME_WAITID_SYSCALL 1
#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