diff options
Diffstat (limited to 'sysdeps/x86_64/fpu/s_copysignf.S')
| -rw-r--r-- | sysdeps/x86_64/fpu/s_copysignf.S | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/sysdeps/x86_64/fpu/s_copysignf.S b/sysdeps/x86_64/fpu/s_copysignf.S new file mode 100644 index 0000000000..46919580d2 --- /dev/null +++ b/sysdeps/x86_64/fpu/s_copysignf.S @@ -0,0 +1,37 @@ +/* copy sign, double version. + Copyright (C) 2002 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Andreas Jaeger <aj@suse.de>, 2002. + + 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 <machine/asm.h> + +ENTRY(__copysignf) + movss %xmm0,-4(%rsp) + mov -4(%rsp,1),%edx + movss %xmm1,-4(%rsp) + mov -4(%rsp),%eax + and $0x7fffffff,%edx + and $0x80000000,%eax + or %eax,%edx + mov %edx,-4(%rsp) + movss -4(%rsp),%xmm1 + movaps %xmm1,%xmm0 + retq +END (__copysignf) + +weak_alias (__copysignf, copysignf) |