diff options
author | Waldemar Brodkorb <wbx@openadk.org> | 2017-05-24 20:49:02 +0200 |
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committer | Waldemar Brodkorb <wbx@openadk.org> | 2017-06-23 23:46:04 +0200 |
commit | 041cdc2769407c4d3869b218ad7ee7638e1c306e (patch) | |
tree | 1ea25250d74dcb230cf5feee99226fc080dbd678 /libc/sysdeps/linux/sparc64/soft-fp/qp_util.c | |
parent | 58a5ba12bffad5916d9897c2870fc483f1db8282 (diff) |
sparc64: add basic support
No NPTL, no LDSO support.
Bootup with Busybox Ash in Qemu working.
Testuite shows only two failures, but mksh continue/break
support doesn't work.
Diffstat (limited to 'libc/sysdeps/linux/sparc64/soft-fp/qp_util.c')
-rw-r--r-- | libc/sysdeps/linux/sparc64/soft-fp/qp_util.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/sparc64/soft-fp/qp_util.c b/libc/sysdeps/linux/sparc64/soft-fp/qp_util.c new file mode 100644 index 000000000..7e1f2511e --- /dev/null +++ b/libc/sysdeps/linux/sparc64/soft-fp/qp_util.c @@ -0,0 +1,60 @@ +/* Software floating-point emulation. + Helper routine for _Qp_* routines. + Simulate exceptions using double arithmetics. + Copyright (C) 1999-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Jakub Jelinek (jj@ultra.linux.cz). + + 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 <float.h> +#include <math.h> +#include <assert.h> +#include "soft-fp.h" + +void __Qp_handle_exceptions(int exceptions) +{ + if (exceptions & FP_EX_INVALID) + { + float f = 0.0; + __asm__ __volatile__ ("fdivs %0, %0, %0" : "+f" (f)); + } + if (exceptions & FP_EX_DIVZERO) + { + float f = 1.0, g = 0.0; + __asm__ __volatile__ ("fdivs %0, %1, %0" + : "+f" (f) + : "f" (g)); + } + if (exceptions & FP_EX_OVERFLOW) + { + float f = FLT_MAX; + __asm__ __volatile__("fmuls %0, %0, %0" : "+f" (f)); + exceptions &= ~FP_EX_INEXACT; + } + if (exceptions & FP_EX_UNDERFLOW) + { + float f = FLT_MIN; + __asm__ __volatile__("fmuls %0, %0, %0" : "+f" (f)); + exceptions &= ~FP_EX_INEXACT; + } + if (exceptions & FP_EX_INEXACT) + { + double d = 1.0, e = M_PI; + __asm__ __volatile__ ("fdivd %0, %1, %0" + : "+f" (d) + : "f" (e)); + } +} |