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author | Jakub Jelinek <jakub@redhat.com> | 2007-07-12 18:26:36 +0000 |
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committer | Jakub Jelinek <jakub@redhat.com> | 2007-07-12 18:26:36 +0000 |
commit | 0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (patch) | |
tree | 2ea1f8305970753e4a657acb2ccc15ca3eec8e2c /sysdeps/hppa/fpu/fraiseexcpt.c | |
parent | 7d58530341304d403a6626d7f7a1913165fe2f32 (diff) | |
download | glibc-0ecb606cb6cf65de1d9fc8a919bceb4be476c602.tar.gz |
2.5-18.1
Diffstat (limited to 'sysdeps/hppa/fpu/fraiseexcpt.c')
-rw-r--r-- | sysdeps/hppa/fpu/fraiseexcpt.c | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/sysdeps/hppa/fpu/fraiseexcpt.c b/sysdeps/hppa/fpu/fraiseexcpt.c deleted file mode 100644 index b064dc1527..0000000000 --- a/sysdeps/hppa/fpu/fraiseexcpt.c +++ /dev/null @@ -1,102 +0,0 @@ -/* Raise given exceptions. - Copyright (C) 1997, 1999, 2000, 2002 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by David Huggins-Daines <dhd@debian.org> - - 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.h> -#include <float.h> -#include <math.h> - -/* Please see section 10, - page 10-5 "Delayed Trapping" in the PA-RISC 2.0 Architecture manual */ - -int -feraiseexcept (int excepts) -{ - /* Raise exceptions represented by EXCEPTS. But we must raise only one - signal at a time. It is important that if the overflow/underflow - exception and the divide by zero exception are given at the same - time, the overflow/underflow exception follows the divide by zero - exception. */ - - /* We do these bits in assembly to be certain GCC doesn't optimize - away something important, and so we can force delayed traps to - occur. */ - - /* We use "fldd 0(%%sr0,%%sp),%0" to flush the delayed exception */ - - /* First: Invalid exception. */ - if (excepts & FE_INVALID) - { - /* One example of a invalid operation is 0 * Infinity. */ - double d = HUGE_VAL; - __asm__ __volatile__ ( - " fcpy,dbl %%fr0,%%fr22\n" - " fmpy,dbl %0,%%fr22,%0\n" - " fldd 0(%%sr0,%%sp),%0" - : "+f" (d) : : "%fr22" ); - } - - /* Second: Division by zero. */ - if (excepts & FE_DIVBYZERO) - { - double d = 1.0; - __asm__ __volatile__ ( - " fcpy,dbl %%fr0,%%fr22\n" - " fdiv,dbl %0,%%fr22,%0\n" - " fldd 0(%%sr0,%%sp),%0" - : "+f" (d) : : "%fr22" ); - } - - /* Third: Overflow. */ - if (excepts & FE_OVERFLOW) - { - double d = DBL_MAX; - __asm__ __volatile__ ( - " fadd,dbl %0,%0,%0\n" - " fldd 0(%%sr0,%%sp),%0" - : "+f" (d) ); - } - - /* Fourth: Underflow. */ - if (excepts & FE_UNDERFLOW) - { - double d = DBL_MIN; - double e = 3.0; - __asm__ __volatile__ ( - " fdiv,dbl %0,%1,%0\n" - " fldd 0(%%sr0,%%sp),%0" - : "+f" (d) : "f" (e) ); - } - - /* Fifth: Inexact */ - if (excepts & FE_INEXACT) - { - double d = M_PI; - double e = 69.69; - __asm__ __volatile__ ( - " fdiv,dbl %0,%1,%%fr22\n" - " fcnvfxt,dbl,sgl %%fr22,%%fr22L\n" - " fldd 0(%%sr0,%%sp),%%fr22" - : : "f" (d), "f" (e) : "%fr22" ); - } - - /* Success. */ - return 0; -} -libm_hidden_def (feraiseexcept) |