diff options
Diffstat (limited to 'REORG.TODO/sysdeps/powerpc/fpu/math_ldbl.h')
| -rw-r--r-- | REORG.TODO/sysdeps/powerpc/fpu/math_ldbl.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/powerpc/fpu/math_ldbl.h b/REORG.TODO/sysdeps/powerpc/fpu/math_ldbl.h new file mode 100644 index 0000000000..05f51217bf --- /dev/null +++ b/REORG.TODO/sysdeps/powerpc/fpu/math_ldbl.h @@ -0,0 +1,55 @@ +/* Manipulation of the bit representation of 'long double' quantities. + Copyright (C) 2006-2017 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 _MATH_LDBL_H_PPC_ +#define _MATH_LDBL_H_PPC_ 1 + +/* GCC does not optimize the default ldbl_pack code to not spill register + in the stack. The following optimization tells gcc that pack/unpack + is really a nop. We use fr1/fr2 because those are the regs used to + pass/return a single long double arg. */ +static inline long double +ldbl_pack_ppc (double a, double aa) +{ + register long double x __asm__ ("fr1"); + register double xh __asm__ ("fr1"); + register double xl __asm__ ("fr2"); + xh = a; + xl = aa; + __asm__ ("" : "=f" (x) : "f" (xh), "f" (xl)); + return x; +} + +static inline void +ldbl_unpack_ppc (long double l, double *a, double *aa) +{ + register long double x __asm__ ("fr1"); + register double xh __asm__ ("fr1"); + register double xl __asm__ ("fr2"); + x = l; + __asm__ ("" : "=f" (xh), "=f" (xl) : "f" (x)); + *a = xh; + *aa = xl; +} + +#define ldbl_pack ldbl_pack_ppc +#define ldbl_unpack ldbl_unpack_ppc + +#include <sysdeps/ieee754/ldbl-128ibm/math_ldbl.h> + +#endif /* math_ldbl.h */ |