diff options
Diffstat (limited to 'sysdeps/s390/fpu/fraiseexcpt.c')
| -rw-r--r-- | sysdeps/s390/fpu/fraiseexcpt.c | 107 |
1 files changed, 0 insertions, 107 deletions
diff --git a/sysdeps/s390/fpu/fraiseexcpt.c b/sysdeps/s390/fpu/fraiseexcpt.c deleted file mode 100644 index d0d93dd5a9..0000000000 --- a/sysdeps/s390/fpu/fraiseexcpt.c +++ /dev/null @@ -1,107 +0,0 @@ -/* Raise given exceptions. - Copyright (C) 2000-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Denis Joseph Barrow (djbarrow@de.ibm.com) and - Martin Schwidefsky (schwidefsky@de.ibm.com). - - 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, see - <http://www.gnu.org/licenses/>. */ - -#include <fenv_libc.h> -#include <float.h> -#include <math.h> - - -static __inline__ void -fexceptdiv (float d, float e) -{ - __asm__ __volatile__ ("debr %0,%1" : : "f" (d), "f" (e) ); -} - -static __inline__ void -fexceptadd (float d, float e) -{ - __asm__ __volatile__ ("aebr %0,%1" : : "f" (d), "f" (e) ); -} - -#ifdef HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT -static __inline__ void -fexceptround (double e) -{ - float d; - /* Load rounded from double to float with M3 = round toward 0, M4 = Suppress - IEEE-inexact exception. - In case of e=0x1p128 and the overflow-mask bit is zero, only the - IEEE-overflow flag is set. If overflow-mask bit is one, DXC field is set to - 0x20 "IEEE overflow, exact". - In case of e=0x1p-150 and the underflow-mask bit is zero, only the - IEEE-underflow flag is set. If underflow-mask bit is one, DXC field is set - to 0x10 "IEEE underflow, exact". - This instruction is available with a zarch machine >= z196. */ - __asm__ __volatile__ ("ledbra %0,5,%1,4" : "=f" (d) : "f" (e) ); -} -#endif - -int -__feraiseexcept (int excepts) -{ - /* Raise exceptions represented by EXPECTS. But we must raise only - one signal at a time. It is important that if the overflow/underflow - exception and the inexact exception are given at the same time, - the overflow/underflow exception follows the inexact exception. */ - - /* First: invalid exception. */ - if (FE_INVALID & excepts) - fexceptdiv (0.0, 0.0); - - /* Next: division by zero. */ - if (FE_DIVBYZERO & excepts) - fexceptdiv (1.0, 0.0); - - /* Next: overflow. */ - if (FE_OVERFLOW & excepts) - { -#ifdef HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT - fexceptround (0x1p128); -#else - /* If overflow-mask bit is zero, both IEEE-overflow and IEEE-inexact flags - are set. If overflow-mask bit is one, DXC field is set to 0x2C "IEEE - overflow, inexact and incremented". */ - fexceptadd (FLT_MAX, 1.0e32); -#endif - } - - /* Next: underflow. */ - if (FE_UNDERFLOW & excepts) - { -#ifdef HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT - fexceptround (0x1p-150); -#else - /* If underflow-mask bit is zero, both IEEE-underflow and IEEE-inexact - flags are set. If underflow-mask bit is one, DXC field is set to 0x1C - "IEEE underflow, inexact and incremented". */ - fexceptdiv (FLT_MIN, 3.0); -#endif - } - - /* Last: inexact. */ - if (FE_INEXACT & excepts) - fexceptdiv (2.0, 3.0); - - /* Success. */ - return 0; -} -libm_hidden_def (__feraiseexcept) -weak_alias (__feraiseexcept, feraiseexcept) -libm_hidden_weak (feraiseexcept) |