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authorUlrich Drepper <drepper@redhat.com>2001-03-16 17:23:19 +0000
committerUlrich Drepper <drepper@redhat.com>2001-03-16 17:23:19 +0000
commitb8a8413c6f7970bc4d5659791c3b3670cc037578 (patch)
treef87371c476b617e38b2f08c34c165f8a3d1d4406 /sysdeps
parentb15ff9d65ed1b730e2aa648b4dceff5638072b4f (diff)
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Update.
2001-03-16 Martin Schwidefsky <schwidefsky@de.ibm.com> * sysdeps/s390/s390-64/bits/huge_val.h: Move to... * sysdeps/s390/bits/huge_val.h: ...here. * sysdeps/s390/s390-32/bit/huge_val.h: Remove. * sysdeps/s390/s390-64/ffs.c: Move to... * sysdeps/s390/ffs.c: ...here. * sysdeps/s390/s390-32/ffs.c: Remove.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/s390/bits/huge_val.h69
-rw-r--r--sysdeps/s390/ffs.c68
2 files changed, 137 insertions, 0 deletions
diff --git a/sysdeps/s390/bits/huge_val.h b/sysdeps/s390/bits/huge_val.h
new file mode 100644
index 0000000000..252749b292
--- /dev/null
+++ b/sysdeps/s390/bits/huge_val.h
@@ -0,0 +1,69 @@
+/* `HUGE_VAL' constants for S/390 (where it is infinity).
+ Used by <stdlib.h> and <math.h> functions for overflow.
+ Copyright (C) 2000, 2001 Free Software Foundation, Inc.
+ Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
+ 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., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#ifndef _MATH_H
+# error "Never use <bits/huge_val.h> directly; include <math.h> instead."
+#endif
+
+#include <features.h>
+
+/* IEEE positive infinity (-HUGE_VAL is negative infinity). */
+
+#if __GNUC_PREREQ(2,96)
+# define HUGE_VAL (__extension__ 0x1.0p2047)
+#else
+# define __HUGE_VAL_bytes { 0x7f, 0xf0, 0, 0, 0, 0, 0, 0 }
+
+# define __huge_val_t union { unsigned char __c[8]; double __d; }
+# ifdef __GNUC__
+# define HUGE_VAL (__extension__ \
+ ((__huge_val_t) { __c: __HUGE_VAL_bytes }).__d)
+# else /* Not GCC. */
+static __huge_val_t __huge_val = { __HUGE_VAL_bytes };
+# define HUGE_VAL (__huge_val.__d)
+# endif /* GCC. */
+#endif /* GCC 2.95 */
+
+
+/* ISO C 99 extensions: (float) HUGE_VALF and (long double) HUGE_VALL. */
+
+#ifdef __USE_ISOC99
+
+# if __GNUC_PREREQ(2,96)
+# define HUGE_VALF (__extension__ 0x1.0p255f)
+# define HUGE_VALL (__extension__ 0x1.0p255f)
+# else
+# define __HUGE_VALF_bytes { 0x7f, 0x80, 0, 0 }
+# define __huge_valf_t union { unsigned char __c[4]; float __f; }
+# ifdef __GNUC__
+# define HUGE_VALF (__extension__ \
+ ((__huge_valf_t) { __c: __HUGE_VALF_bytes }).__f)
+# else /* Not GCC. */
+static __huge_valf_t __huge_valf = { __HUGE_VALF_bytes };
+# define HUGE_VALF (__huge_valf.__f)
+# endif /* GCC. */
+
+/* On 390 there is no 'long double' format. Make it the same as 'double' */
+# define HUGE_VALL HUGE_VAL
+
+# endif /* GCC 2.95 */
+
+#endif /* __USE_ISOC99. */
diff --git a/sysdeps/s390/ffs.c b/sysdeps/s390/ffs.c
new file mode 100644
index 0000000000..048913defb
--- /dev/null
+++ b/sysdeps/s390/ffs.c
@@ -0,0 +1,68 @@
+/* ffs -- find first set bit in a word, counted from least significant end.
+ S/390 version.
+ Copyright (C) 2000, 2001 Free Software Foundation, Inc.
+ Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
+ 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., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#define ffsl __something_else
+#include <string.h>
+
+#undef ffs
+
+/* ffs: find first bit set. This is defined the same way as
+ the libc and compiler builtin ffs routines, therefore
+ differs in spirit from the above ffz (man ffs). */
+
+int
+__ffs (x)
+ int x;
+{
+ int r;
+
+ if (x == 0)
+ return 0;
+ __asm__(" lr %%r1,%1\n"
+ " sr %0,%0\n"
+ " tml %%r1,0xFFFF\n"
+ " jnz 0f\n"
+ " ahi %0,16\n"
+ " srl %%r1,16\n"
+ "0: tml %%r1,0x00FF\n"
+ " jnz 1f\n"
+ " ahi %0,8\n"
+ " srl %%r1,8\n"
+ "1: tml %%r1,0x000F\n"
+ " jnz 2f\n"
+ " ahi %0,4\n"
+ " srl %%r1,4\n"
+ "2: tml %%r1,0x0003\n"
+ " jnz 3f\n"
+ " ahi %0,2\n"
+ " srl %%r1,2\n"
+ "3: tml %%r1,0x0001\n"
+ " jnz 4f\n"
+ " ahi %0,1\n"
+ "4:"
+ : "=&d" (r) : "d" (x) : "cc", "1" );
+ return r+1;
+}
+
+weak_alias (__ffs, ffs)
+#undef ffsl
+weak_alias (__ffs, ffsl)
+