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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /sysdeps/rs6000
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initial import
Diffstat (limited to 'sysdeps/rs6000')
-rw-r--r--sysdeps/rs6000/ffs.c39
-rw-r--r--sysdeps/rs6000/memcopy.h86
2 files changed, 125 insertions, 0 deletions
diff --git a/sysdeps/rs6000/ffs.c b/sysdeps/rs6000/ffs.c
new file mode 100644
index 0000000000..44e7a434d2
--- /dev/null
+++ b/sysdeps/rs6000/ffs.c
@@ -0,0 +1,39 @@
+/* ffs -- find first set bit in a word, counted from least significant end.
+ For IBM rs6000.
+ Copyright (C) 1991, 1992 Free Software Foundation, Inc.
+ Contributed by Torbjorn Granlund (tege@sics.se).
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <ansidecl.h>
+#include <bstring.h>
+
+#undef ffs
+
+#ifdef __GNUC__
+
+int
+DEFUN(ffs, (x), int x)
+{
+ int cnt;
+
+ asm ("cntlz %0,%1" : "=r" (cnt) : "r" (x & -x));
+ return 32 - cnt;
+}
+
+#else
+#include <sysdeps/generic/ffs.c>
+#endif
diff --git a/sysdeps/rs6000/memcopy.h b/sysdeps/rs6000/memcopy.h
new file mode 100644
index 0000000000..873b31200b
--- /dev/null
+++ b/sysdeps/rs6000/memcopy.h
@@ -0,0 +1,86 @@
+/* Copyright (C) 1991 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <sysdeps/generic/memcopy.h>
+
+#undef OP_T_THRES
+#define OP_T_THRES 32
+
+#undef BYTE_COPY_FWD
+#define BYTE_COPY_FWD(dst_bp, src_bp, nbytes) \
+ do \
+ { \
+ size_t __nbytes = nbytes; \
+ asm volatile("mtspr 1,%2\n" \
+ "lsx 6,0,%1\n" \
+ "stsx 6,0,%0" : /* No outputs. */ : \
+ "b" (dst_bp), "b" (src_bp), "r" (__nbytes) : \
+ "6", "7", "8", "9", "10", "11", "12", "13"); \
+ dst_bp += __nbytes; \
+ src_bp += __nbytes; \
+ } while (0)
+
+#undef BYTE_COPY_BWD
+#define BYTE_COPY_BWD(dst_ep, src_ep, nbytes) \
+ do \
+ { \
+ size_t __nbytes = (nbytes); \
+ dst_ep -= __nbytes; \
+ src_ep -= __nbytes; \
+ asm volatile("mtspr 1,%2\n" \
+ "lsx 6,0,%1\n" \
+ "stsx 6,0,%0" : /* No outputs. */ : \
+ "b" (dst_ep), "b" (src_ep), "r" (__nbytes) : \
+ "6", "7", "8", "9", "10", "11", "12", "13"); \
+ } while (0)
+
+#undef WORD_COPY_FWD
+#define WORD_COPY_FWD(dst_bp, src_bp, nbytes_left, nbytes) \
+ do \
+ { \
+ size_t __nblocks = (nbytes) / 32; \
+ if (__nblocks != 0) \
+ asm volatile("mtctr %4\n" \
+ "lsi 6,%1,32\n" \
+ "ai %1,%1,32\n" \
+ "stsi 6,%0,32\n" \
+ "ai %0,%0,32\n" \
+ "bdn $-16" : \
+ "=b" (dst_bp), "=b" (src_bp) : \
+ "0" (dst_bp), "1" (src_bp), "r" (__nblocks) : \
+ "6", "7", "8", "9", "10", "11", "12", "13"); \
+ (nbytes_left) = (nbytes) % 32; \
+ } while (0)
+
+#undef WORD_COPY_BWD
+#define WORD_COPY_BWD(dst_ep, src_ep, nbytes_left, nbytes) \
+ do \
+ { \
+ size_t __nblocks = (nbytes) / 32; \
+ if (__nblocks != 0) \
+ asm volatile("mtctr %4\n" \
+ "ai %1,%1,-32\n" \
+ "lsi 6,%1,32\n" \
+ "ai %0,%0,-32\n" \
+ "stsi 6,%0,32\n" \
+ "bdn $-16" : \
+ "=b" (dst_ep), "=b" (src_ep) : \
+ "0" (dst_ep), "1" (src_ep), "r" (__nblocks) : \
+ "6", "7", "8", "9", "10", "11", "12", "13"); \
+ (nbytes_left) = (nbytes) % 32; \
+ } while (0)