diff options
Diffstat (limited to 'ports/sysdeps/arm/fraiseexcpt.c')
| -rw-r--r-- | ports/sysdeps/arm/fraiseexcpt.c | 106 |
1 files changed, 0 insertions, 106 deletions
diff --git a/ports/sysdeps/arm/fraiseexcpt.c b/ports/sysdeps/arm/fraiseexcpt.c deleted file mode 100644 index 8b320651eb..0000000000 --- a/ports/sysdeps/arm/fraiseexcpt.c +++ /dev/null @@ -1,106 +0,0 @@ -/* Raise given exceptions. - Copyright (C) 2004-2014 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, see - <http://www.gnu.org/licenses/>. */ - -#include <fpu_control.h> -#include <fenv.h> -#include <float.h> -#include <arm-features.h> - - -int -feraiseexcept (int excepts) -{ - if (ARM_HAVE_VFP) - { - int fpscr; - const float fp_zero = 0.0, fp_one = 1.0, fp_max = FLT_MAX, - fp_min = FLT_MIN, fp_1e32 = 1.0e32f, fp_two = 2.0, - fp_three = 3.0; - - /* 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. After - each exception we read from the fpscr, to force the exception to be - raised immediately. */ - - /* There are additional complications because this file may be compiled - without VFP support enabled, and we also can't assume that the - assembler has VFP instructions enabled. To get around this we use the - generic coprocessor mnemonics and avoid asking GCC to put float values - in VFP registers. */ - - /* First: invalid exception. */ - if (FE_INVALID & excepts) - __asm__ __volatile__ ( - "ldc p10, cr0, %1\n\t" /* flds s0, %1 */ - "cdp p10, 8, cr0, cr0, cr0, 0\n\t" /* fdivs s0, s0, s0 */ - "mrc p10, 7, %0, cr1, cr0, 0" : "=r" (fpscr) /* fmrx %0, fpscr */ - : "m" (fp_zero) - : "s0"); - - /* Next: division by zero. */ - if (FE_DIVBYZERO & excepts) - __asm__ __volatile__ ( - "ldc p10, cr0, %1\n\t" /* flds s0, %1 */ - "ldcl p10, cr0, %2\n\t" /* flds s1, %2 */ - "cdp p10, 8, cr0, cr0, cr0, 1\n\t" /* fdivs s0, s0, s1 */ - "mrc p10, 7, %0, cr1, cr0, 0" : "=r" (fpscr) /* fmrx %0, fpscr */ - : "m" (fp_one), "m" (fp_zero) - : "s0", "s1"); - - /* Next: overflow. */ - if (FE_OVERFLOW & excepts) - /* There's no way to raise overflow without also raising inexact. */ - __asm__ __volatile__ ( - "ldc p10, cr0, %1\n\t" /* flds s0, %1 */ - "ldcl p10, cr0, %2\n\t" /* flds s1, %2 */ - "cdp p10, 3, cr0, cr0, cr0, 1\n\t" /* fadds s0, s0, s1 */ - "mrc p10, 7, %0, cr1, cr0, 0" : "=r" (fpscr) /* fmrx %0, fpscr */ - : "m" (fp_max), "m" (fp_1e32) - : "s0", "s1"); - - /* Next: underflow. */ - if (FE_UNDERFLOW & excepts) - __asm__ __volatile__ ( - "ldc p10, cr0, %1\n\t" /* flds s0, %1 */ - "ldcl p10, cr0, %2\n\t" /* flds s1, %2 */ - "cdp p10, 8, cr0, cr0, cr0, 1\n\t" /* fdivs s0, s0, s1 */ - "mrc p10, 7, %0, cr1, cr0, 0" : "=r" (fpscr) /* fmrx %0, fpscr */ - : "m" (fp_min), "m" (fp_three) - : "s0", "s1"); - - /* Last: inexact. */ - if (FE_INEXACT & excepts) - __asm__ __volatile__ ( - "ldc p10, cr0, %1\n\t" /* flds s0, %1 */ - "ldcl p10, cr0, %2\n\t" /* flds s1, %2 */ - "cdp p10, 8, cr0, cr0, cr0, 1\n\t" /* fdivs s0, s0, s1 */ - "mrc p10, 7, %0, cr1, cr0, 0" : "=r" (fpscr) /* fmrx %0, fpscr */ - : "m" (fp_two), "m" (fp_three) - : "s0", "s1"); - - /* Success. */ - return 0; - } - - /* Unsupported, so fail unless nothing needs to be done. */ - return (excepts != 0); -} - -libm_hidden_def (feraiseexcept) |