diff options
Diffstat (limited to 'sysdeps/tile/tilegx/string-endian.h')
| -rw-r--r-- | sysdeps/tile/tilegx/string-endian.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/sysdeps/tile/tilegx/string-endian.h b/sysdeps/tile/tilegx/string-endian.h new file mode 100644 index 0000000000..29ca793af1 --- /dev/null +++ b/sysdeps/tile/tilegx/string-endian.h @@ -0,0 +1,36 @@ +/* Copyright (C) 2011 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. + + 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. */ + +/* Provide a mask based on the pointer alignment that + sets up non-zero bytes before the beginning of the string. + The MASK expression works because shift counts are taken mod 64. + Also, specify how to count "first" and "last" bits + when the bits have been read as a word. */ + +#ifndef __BIG_ENDIAN__ +#define MASK(x) (__insn_shl(1ULL, (x << 3)) - 1) +#define NULMASK(x) ((2ULL << x) - 1) +#define CFZ(x) __insn_ctz(x) +#define REVCZ(x) __insn_clz(x) +#else +#define MASK(x) (__insn_shl(-2LL, ((-x << 3) - 1))) +#define NULMASK(x) (-2LL << (63 - x)) +#define CFZ(x) __insn_clz(x) +#define REVCZ(x) __insn_ctz(x) +#endif |