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authorUlrich Drepper <drepper@redhat.com>1997-06-27 23:09:40 +0000
committerUlrich Drepper <drepper@redhat.com>1997-06-27 23:09:40 +0000
commitbca973bcd954bb43e0d55b6fe3dd0648df52466a (patch)
treee1a60757fe61908da054c878b2722265cd66570f /sysdeps/i386
parentae1025be4026d5d4beb605541854d800ce05ee4e (diff)
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1997-06-27 20:09 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/sys/quota.h: Add <asm/types.h>. Reported by a sun <asun@zoology.washington.edu>. * libc.map: Add _rpc_dtablesize. Reported by Thorsten Kukuk. * db/makedb.c: Exit with error if number of option is incorrect. * math/Makefile (tests): Add test-fenv. * math/test-fenv.c: New file. Test for exception handling functions. Written mainly by Andreas Jaeger. * sysdeps/i386/fpu/fraiseexcpt.c: Correct implementation. * sysdeps/mach/hurd/abi-tag.h: Set tag to 1 for Hurd and kernel compatibility version to 0. Reported by Roland McGrath. 1997-06-27 18:49 Philip Blundell <Philip.Blundell@pobox.com> * sysdeps/standalone/brk.c (__NONE_set_memvals): Correct typo. * sysdeps/standalone/arm/bits/errno.h: Add ENOTDIR. * sysdeps/stub/sys/param.h: Add definition of MAX and MIN. 1997-06-27 10:44 Fila Kolodny <fila@ibi.com> * sysdeps/mach/hurd/dl-sysdep.c: Make _dl_sysdep_read_whole_file weak. 1997-06-27 00:51 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * elf/dl-open.c (_dl_open): Check versions of all newly loaded objects, including dependencies. * elf/dl-runtime.c (fixup): Always use version information if available. 1997-06-26 12:25 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/m68k/bits/nan.h: Renamed from sysdeps/m68k/nan.h. 1997-06-26 11:40 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * posix/regex.c (DEBUG_POP): Assume parameter to be pointer to int, not pointer to fail_stack_elt_t. (PUSH_FAILURE_POINT): Fix all formats in debugging messages. Fix type of this_reg. (POP_FAILURE_POINT): Likewise. Fix type of failure_id. (re_match_2_internal): Pass NULL, not 0, to PUSH_FAILURE_POINT. 1997-06-27 02:17 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/syscalls.list: Add quotactl. Reported by a sun. * manual/lgpl.texinfo: Update copyright.
Diffstat (limited to 'sysdeps/i386')
-rw-r--r--sysdeps/i386/fpu/fraiseexcpt.c51
1 files changed, 37 insertions, 14 deletions
diff --git a/sysdeps/i386/fpu/fraiseexcpt.c b/sysdeps/i386/fpu/fraiseexcpt.c
index 90e992aaec..c6cd6d6672 100644
--- a/sysdeps/i386/fpu/fraiseexcpt.c
+++ b/sysdeps/i386/fpu/fraiseexcpt.c
@@ -32,44 +32,67 @@ feraiseexcept (int excepts)
/* First: invalid exception. */
if ((FE_INVALID & excepts) != 0)
{
- /* One example of a invalid operation is 0 * Infinity. */
- double d = 0.0 * HUGE_VAL;
+ /* One example of a invalid operation is 0.0 / 0.0. */
+ double d;
+ __asm__ ("fldz; fdiv %%st, %%st(0); fwait" : "=t" (d));
(void) &d;
- /* Now force the exception. */
- __asm__ ("fwait");
}
/* Next: division by zero. */
if ((FE_DIVBYZERO & excepts) != 0)
{
double d;
- __asm__ ("fld1; fldz; fdivp %%st, %%st(1); fwait" : "=t" (d));
+ __asm__ ("fldz; fld1; fdivp %%st, %%st(1); fwait" : "=t" (d));
(void) &d;
}
/* Next: overflow. */
if ((FE_OVERFLOW & excepts) != 0)
{
- long double d = LDBL_MAX * LDBL_MAX;
- (void) &d;
- /* Now force the exception. */
- __asm__ ("fwait");
+ /* There is no way to raise only the overflow flag. Do it the
+ hard way. */
+ fenv_t temp;
+
+ /* Bah, we have to clear selected exceptions. Since there is no
+ `fldsw' instruction we have to do it the hard way. */
+ __asm__ ("fnstenv %0" : "=m" (*&temp));
+
+ /* Set the relevant bits. */
+ temp.status_word |= FE_OVERFLOW;
+
+ /* Put the new data in effect. */
+ __asm__ ("fldenv %0" : : "m" (*&temp));
+
+ /* And raise the exception. */
+ __asm__ ("fwait");
}
/* Next: underflow. */
if ((FE_UNDERFLOW & excepts) != 0)
{
- long double d = LDBL_MIN / 16.0;
- (void) &d;
- /* Now force the exception. */
- __asm__ ("fwait");
+ /* There is no way to raise only the overflow flag. Do it the
+ hard way. */
+ fenv_t temp;
+
+ /* Bah, we have to clear selected exceptions. Since there is no
+ `fldsw' instruction we have to do it the hard way. */
+ __asm__ ("fnstenv %0" : "=m" (*&temp));
+
+ /* Set the relevant bits. */
+ temp.status_word |= FE_UNDERFLOW;
+
+ /* Put the new data in effect. */
+ __asm__ ("fldenv %0" : : "m" (*&temp));
+
+ /* And raise the exception. */
+ __asm__ ("fwait");
}
/* Last: inexact. */
if ((FE_INEXACT & excepts) != 0)
{
long double d;
- __asm__ ("fld1; fldpi; fdivp %%st, %%st(1); fwait" : "=t" (d));
+ __asm__ ("fmul %%st, %%st(0); fwait" : "=t" (d) : "0" (LDBL_MAX));
(void) &d;
}
}