diff options
Diffstat (limited to 'sysdeps/i386/fpu/i386-math-asm.h')
| -rw-r--r-- | sysdeps/i386/fpu/i386-math-asm.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/sysdeps/i386/fpu/i386-math-asm.h b/sysdeps/i386/fpu/i386-math-asm.h new file mode 100644 index 0000000000..fd4313016c --- /dev/null +++ b/sysdeps/i386/fpu/i386-math-asm.h @@ -0,0 +1,39 @@ +/* Helper macros for x86 libm functions. + Copyright (C) 2015 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/>. */ + +#ifndef _I386_MATH_ASM_H +#define _I386_MATH_ASM_H 1 + +/* Remove excess range and precision by storing a value on the stack + and loading it back. */ +#define FLT_NARROW_EVAL \ + subl $4, %esp; \ + cfi_adjust_cfa_offset (4); \ + fstps (%esp); \ + flds (%esp); \ + addl $4, %esp; \ + cfi_adjust_cfa_offset (-4); +#define DBL_NARROW_EVAL \ + subl $8, %esp; \ + cfi_adjust_cfa_offset (8); \ + fstpl (%esp); \ + fldl (%esp); \ + addl $8, %esp; \ + cfi_adjust_cfa_offset (-8); + +#endif /* i386-math-asm.h. */ |