From bca973bcd954bb43e0d55b6fe3dd0648df52466a Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Fri, 27 Jun 1997 23:09:40 +0000 Subject: Update. 1997-06-27 20:09 Ulrich Drepper * sysdeps/unix/sysv/linux/sys/quota.h: Add . Reported by a sun . * 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 * 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 * sysdeps/mach/hurd/dl-sysdep.c: Make _dl_sysdep_read_whole_file weak. 1997-06-27 00:51 Andreas Schwab * 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 * sysdeps/m68k/bits/nan.h: Renamed from sysdeps/m68k/nan.h. 1997-06-26 11:40 Andreas Schwab * 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 * sysdeps/unix/sysv/linux/syscalls.list: Add quotactl. Reported by a sun. * manual/lgpl.texinfo: Update copyright. --- sysdeps/i386/fpu/fraiseexcpt.c | 51 ++++++++++++++++++++++++++++++------------ 1 file changed, 37 insertions(+), 14 deletions(-) (limited to 'sysdeps/i386/fpu/fraiseexcpt.c') 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; } } -- cgit v1.2.1