Sat Mar 16 20:08:22 1996 David Mosberger-Tang <davidm@azstarnet.com>

	* sysdeps/alpha/memchr.S: new file.
	* sysdeps/alpha/memchr.c: obsolete file removed.

Sat Mar 16 16:26:09 1996  Roland McGrath  <roland@charlie-brown.gnu.ai.mit.edu>

	* misc/Makefile (headers): Add sysexits.h.
	* misc/sysexits.h: New file.

Thu Mar 14 15:20:45 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/libm-ieee754/e_atan2.c (__ieee754_atan2): Change atan
	call to __atan.
	* sysdeps/libm-ieee754/e_atan2f.c (__ieee754_atan2f): Change atanf
 	call to __atanf.

	* sysdeps/m68k/fpu/e_acos.c, sysdeps/m68k/fpu/e_acosf.c,
	sysdeps/m68k/fpu/e_asin.c, sysdeps/m68k/fpu/e_asinf.c,
	sysdeps/m68k/fpu/e_atanh.c, sysdeps/m68k/fpu/e_atanhf.c,
	sysdeps/m68k/fpu/e_cosh.c, sysdeps/m68k/fpu/e_coshf.c,
	sysdeps/m68k/fpu/e_exp.c, sysdeps/m68k/fpu/e_expf.c,
	sysdeps/m68k/fpu/e_fmod.c, sysdeps/m68k/fpu/e_fmodf.c,
	sysdeps/m68k/fpu/e_log.c, sysdeps/m68k/fpu/e_log10.c,
	sysdeps/m68k/fpu/e_log10f.c, sysdeps/m68k/fpu/e_logf.c,
	sysdeps/m68k/fpu/e_pow.c, sysdeps/m68k/fpu/e_powf.c,
	sysdeps/m68k/fpu/e_remainder.c, sysdeps/m68k/fpu/e_remainderf.c,
	sysdeps/m68k/fpu/e_scalb.c, sysdeps/m68k/fpu/e_scalbf.c,
	sysdeps/m68k/fpu/e_sinh.c, sysdeps/m68k/fpu/e_sinhf.c,
	sysdeps/m68k/fpu/e_sqrt.c, sysdeps/m68k/fpu/e_sqrtf.c,
	sysdeps/m68k/fpu/k_cos.c, sysdeps/m68k/fpu/k_cosf.c,
	sysdeps/m68k/fpu/k_sin.c, sysdeps/m68k/fpu/k_sinf.c,
	sysdeps/m68k/fpu/k_tan.c, sysdeps/m68k/fpu/k_tanf.c,
	sysdeps/m68k/fpu/s_atan.c, sysdeps/m68k/fpu/s_atanf.c,
	sysdeps/m68k/fpu/s_ceil.c, sysdeps/m68k/fpu/s_ceilf.c,
	sysdeps/m68k/fpu/s_cos.c, sysdeps/m68k/fpu/s_cosf.c,
	sysdeps/m68k/fpu/s_expm1.c, sysdeps/m68k/fpu/s_expm1f.c,
	sysdeps/m68k/fpu/s_fabs.c, sysdeps/m68k/fpu/s_fabsf.c,
	sysdeps/m68k/fpu/s_finite.c, sysdeps/m68k/fpu/s_finitef.c,
	sysdeps/m68k/fpu/s_floor.c, sysdeps/m68k/fpu/s_floorf.c,
	sysdeps/m68k/fpu/s_frexp.c, sysdeps/m68k/fpu/s_frexpf.c,
	sysdeps/m68k/fpu/s_ilogb.c, sysdeps/m68k/fpu/s_ilogbf.c,
	sysdeps/m68k/fpu/s_isinf.c, sysdeps/m68k/fpu/s_isinff.c,
	sysdeps/m68k/fpu/s_isnan.c, sysdeps/m68k/fpu/s_isnanf.c,
	sysdeps/m68k/fpu/s_ldexp.c, sysdeps/m68k/fpu/s_ldexpf.c,
	sysdeps/m68k/fpu/s_log1p.c, sysdeps/m68k/fpu/s_log1pf.c,
	sysdeps/m68k/fpu/s_logb.c, sysdeps/m68k/fpu/s_logbf.c,
	sysdeps/m68k/fpu/s_modf.c, sysdeps/m68k/fpu/s_modff.c,
	sysdeps/m68k/fpu/s_rint.c, sysdeps/m68k/fpu/s_rintf.c,
	sysdeps/m68k/fpu/s_scalbn.c, sysdeps/m68k/fpu/s_scalbnf.c,
	sysdeps/m68k/fpu/s_significand.c,
	sysdeps/m68k/fpu/s_significandf.c, sysdeps/m68k/fpu/s_sin.c,
	sysdeps/m68k/fpu/s_sinf.c, sysdeps/m68k/fpu/s_tan.c,
	sysdeps/m68k/fpu/s_tanf.c, sysdeps/m68k/fpu/s_tanh.c,
	sysdeps/m68k/fpu/s_tanhf.c: New files, for m68881 port of fdlibm.

	* sysdeps/m68k/fpu/__math.h: Rewritten for fdlibm.

	* sysdeps/m68k/fpu/isinfl.c: Rewritten to get argument type right.
	* sysdeps/m68k/fpu/isnanl.c: Likewise.

Thu Mar 14 06:01:07 1996  Roland McGrath  <roland@charlie-brown.gnu.ai.mit.edu>

	* posix/glob.c (glob): In GLOB_BRACE brace expansion, fix buffer size
	calculation to include trailing invariant portion.  Don't use alloca;
	instead use a dynamic auto array for GCC, malloc for non-GCC.
	Handle nested braces properly.

	* elf/elf.h (Elf32_auxv_t): Specify prototype (void) for `a_un.a_fcn'.

	* libc-symbols.h (lint): New macro.

Fri Mar 15 01:18:00 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* libio/iosetvbuf.c: Add weak alias setvbuf.

2 files changed, 163 insertions, 86 deletions

diff --git a/sysdeps/alpha/memchr.S b/sysdeps/alpha/memchr.S
new file mode 100644
index 0000000000..118a1f13d1
--- /dev/null
+++ b/sysdeps/alpha/memchr.S
@@ -0,0 +1,163 @@
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+   Contributed by David Mosberger (davidm@cs.arizona.edu).
+
+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.  */
+
+/* Finds characters in a memory area.  Optimized for the Alpha
+architecture:
+
+      - memory accessed as aligned quadwords only
+      - uses cmpbge to compare 8 bytes in parallel
+      - does binary search to find 0 byte in last
+        quadword (HAKMEM needed 12 instructions to
+        do this instead of the 9 instructions that
+        binary search needs).
+
+For correctness consider that:
+
+      - only minimum number of quadwords may be accessed
+      - the third argument is an unsigned long
+*/
+
+#include <sysdep.h>
+#ifdef __linux__
+# include <alpha/regdef.h>
+#else
+#include <regdef.h>
+#endif
+
+        .set noreorder
+        .set noat
+
+ENTRY(memchr)
+	beq	a2, not_found
+        ldq_u   t0, 0(a0)       # load first quadword (a0 may be misaligned)
+	addq	a0, a2, t4
+	and	a1, 0xff, a1	# a1 = 00000000000000ch
+	ldq_u	t5, -1(t4)
+	sll	a1,  8, t1	# t1 = 000000000000ch00
+	cmpult	a2, 9, t3
+	or	t1, a1, a1	# a1 = 000000000000chch
+	sll	a1, 16, t1	# t1 = 00000000chch0000
+        lda     t2, -1(zero)
+	or	t1, a1, a1	# a1 = 00000000chchchch
+	sll	a1, 32, t1	# t1 = chchchch00000000
+	extql	t0, a0, t6
+	or	t1, a1, a1	# a1 = chchchchchchchch
+
+	beq	t3, first_quad
+
+	extqh	t5, a0, t5
+	mov	a0, v0
+	or	t6, t5, t0	# t0 = quadword starting at a0
+
+	#
+	# Deal with the case where at most 8 bytes remain to be searched
+	# in t0.  E.g.:
+	#	a2 = 6
+	#	t0 = ????c6c5c4c3c2c1
+last_quad:
+	negq	a2, t5
+	srl	t2, t5, t5	# t5 = mask of a2 bits set
+        xor	a1, t0, t0
+        cmpbge  zero, t0, t1
+	and	t1, t5, t1
+        beq     t1, not_found
+
+found_it:
+	# now, determine which byte matched:
+        negq    t1, t2
+        and     t1, t2, t1
+
+        and     t1, 0x0f, t0
+        addq    v0, 4, t2
+        cmoveq  t0, t2, v0
+
+        and     t1, 0x33, t0
+        addq    v0, 2, t2
+        cmoveq  t0, t2, v0
+
+        and     t1, 0x55, t0
+        addq    v0, 1, t2
+        cmoveq  t0, t2, v0
+
+done:	ret
+
+
+	#
+	# Deal with the case where a2 > 8 bytes remain to be
+	# searched.  a0 may not be aligned.
+	#
+first_quad:
+	andnot	a0, 0x7, v0
+        insqh   t2, a0, t1	# t1 = 0000ffffffffffff (a0<0:2> ff bytes)
+        xor	t0, a1, t0
+	or	t0, t1, t0	# t0 = ====ffffffffffff
+        cmpbge  zero, t0, t1
+        bne     t1, found_it
+
+	/* at least one byte left to process */
+
+	ldq	t0, 8(v0)
+	addq	v0, 8, v0
+	/*
+	 * Make a2 point to last quad to be accessed (the
+	 * last quad may or may not be partial).
+	 */
+	subq	t4, 1, a2
+	andnot	a2, 0x7, a2
+	cmpult	v0, a2, t1
+	beq	t1, final
+
+	/* at least two quads remain to be accessed */
+
+	subq	a2, v0, t3	# t3 <- number of quads to be processed in loop
+	and	t3, 8, t3	# odd number of quads?
+	bne	t3, odd_quad_count
+
+	/* at least three quads remain to be accessed */
+
+	mov	t0, t3		# move prefetched value into correct register
+
+	.align	3
+unrolled_loop:
+	ldq	t0, 8(v0)	# prefetch t0
+	xor	a1, t3, t1
+	cmpbge	zero, t1, t1
+	bne	t1, found_it
+
+	addq	v0, 8, v0
+odd_quad_count:
+	xor	a1, t0, t1
+	ldq	t3, 8(v0)	# prefetch t3
+	cmpbge	zero, t1, t1
+	bne	t1, found_it
+
+	addq	v0, 8, v0
+	cmpult	v0, a2, t5
+	bne	t5, unrolled_loop
+
+	mov	t3, t0		# move prefetched value into t0
+final:	subq	t4, v0, a2	# a2 <- number of bytes left to do
+	bne	a2, last_quad
+
+not_found:
+	mov	zero, v0
+	ret
+
+        .end    memchr
diff --git a/sysdeps/alpha/memchr.c b/sysdeps/alpha/memchr.c
deleted file mode 100644
index a911302ea6..0000000000
--- a/sysdeps/alpha/memchr.c
+++ /dev/null
@@ -1,86 +0,0 @@
-/* Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
-
-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 <string.h>
-
-/* Search no more than N bytes of S for C.  */
-
-void *
-memchr (const void *s, int c, size_t n)
-{
-  const char *char_ptr;
-  const unsigned long int *longword_ptr;
-  unsigned long int charmask;
-  size_t x;
-
-  c = (unsigned char) c;
-
-  /* Handle the first few characters by reading one character at a time.
-     Do this until STR is aligned on a 8-byte border.  */
-  for (char_ptr = s; n > 0 && ((unsigned long int) char_ptr & 7) != 0;
-       --n, ++char_ptr)
-    if (*char_ptr == c)
-      return (void *) char_ptr;
-
-  if (n == (size_t)0)
-    return NULL;
-
-  x = n;
-
-  longword_ptr = (unsigned long int *) char_ptr;
-
-  /* Set up a longword, each of whose bytes is C.  */
-  charmask = c | (c << 8);
-  charmask |= charmask << 16;
-  charmask |= charmask << 32;
-
-  for (;;)
-    {
-      const unsigned long int longword = *longword_ptr++;
-      int ge, le;
-
-      if (x < 4)
-	x = (size_t) 0;
-      else
-	x -= 4;
-
-      /* Set bits in GE if bytes in CHARMASK are >= bytes in LONGWORD.  */
-      asm ("cmpbge %1, %2, %0" : "=r" (ge) : "r" (charmask), "r" (longword));
-
-      /* Set bits in LE if bytes in CHARMASK are <= bytes in LONGWORD.  */
-      asm ("cmpbge %2, %1, %0" : "=r" (le) : "r" (charmask), "r" (longword));
-
-      /* Bytes that are both <= and >= are == to C.  */
-      if (ge & le)
-	{
-	  /* Which of the bytes was the C?  */
-
-	  unsigned char *cp = (unsigned char *) (longword_ptr - 1);
-	  int i;
-
-	  for (i = 0; i < 7; i++)
-	    if (cp[i] == c)
-	      return &cp[i];
-	  return &cp[7];
-	}
-
-      if (x == (size_t)0)
-	break;
-    }
-
-  return NULL;
-}