svn commit: r351145 - in stable: 11/stand/libsa 12/stand/libsa

[Kyle Evans]

Author: kevans
Date: Fri Aug 16 21:14:27 2019
New Revision: 351145
URL: https://svnweb.freebsd.org/changeset/base/351145

Log:
  MFC r351078, r351085, r351088: mostly a nop (two commits + revert of two)
  
  This commit is mostly a nop, but ends up renumbering #4 clause to #3 in one
  copy of quad.h... this is OK; stand/ situation in stable/11 is pretty murky
  and the commit that renumbered the clause got lost somewhere. quad.h will be
  disappearing in a not-so-distant future MFC.
  
  r351078:
  stand: kick out quad.h
  
  Use quad.h from libc instead for the time being. This reduces the number of
  nearly-identical-quad.h we have in tree to two with only minor changes.
  
  Prototypes for some *sh*di3 have been added to match the copy in libkern.
  The differences between the two are likely few enough that they can perhaps
  be merged with little additional effort to bring us down to 1.
  
  r351085:
  libc quad.h: one last _STANDALONE correction
  
  r351088:
  Revert r351078, r351085: stand/quad.h eviction
  
  It did not go well; further examination is required...

Replaced:
  stable/12/stand/libsa/quad.h
     - copied unchanged from r351088, head/stand/libsa/quad.h
Modified:
Directory Properties:
  stable/12/   (props changed)

Changes in other areas also in this revision:
Replaced:
  stable/11/stand/libsa/quad.h
     - copied unchanged from r351088, head/stand/libsa/quad.h
Modified:
Directory Properties:
  stable/11/   (props changed)

Copied: stable/12/stand/libsa/quad.h (from r351088, head/stand/libsa/quad.h)
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ stable/12/stand/libsa/quad.h	Fri Aug 16 21:14:27 2019	(r351145, copy of r351088, head/stand/libsa/quad.h)
@@ -0,0 +1,114 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)quad.h	8.1 (Berkeley) 6/4/93
+ * $FreeBSD$
+ */
+
+/*
+ * Quad arithmetic.
+ *
+ * This library makes the following assumptions:
+ *
+ *  - The type long long (aka quad_t) exists.
+ *
+ *  - A quad variable is exactly twice as long as `long'.
+ *
+ *  - The machine's arithmetic is two's complement.
+ *
+ * This library can provide 128-bit arithmetic on a machine with 128-bit
+ * quads and 64-bit longs, for instance, or 96-bit arithmetic on machines
+ * with 48-bit longs.
+ */
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+#include <limits.h>
+
+_Static_assert(sizeof(quad_t) == sizeof(int) * 2,
+	"Bitwise function in libstand are broken on this architecture\n");
+
+/*
+ * Depending on the desired operation, we view a `long long' (aka quad_t) in
+ * one or more of the following formats.
+ */
+union uu {
+	quad_t	q;		/* as a (signed) quad */
+	quad_t	uq;		/* as an unsigned quad */
+	int	sl[2];		/* as two signed ints */
+	u_int	ul[2];		/* as two unsigned ints */
+};
+
+/*
+ * Define high and low longwords.
+ */
+#define	H		_QUAD_HIGHWORD
+#define	L		_QUAD_LOWWORD
+
+/*
+ * Total number of bits in a quad_t and in the pieces that make it up.
+ * These are used for shifting, and also below for halfword extraction
+ * and assembly.
+ */
+#define	QUAD_BITS	(sizeof(quad_t) * CHAR_BIT)
+#define	HALF_BITS	(sizeof(int) * CHAR_BIT / 2)
+
+/*
+ * Extract high and low shortwords from longword, and move low shortword of
+ * longword to upper half of long, i.e., produce the upper longword of
+ * ((quad_t)(x) << (number_of_bits_in_long/2)).  (`x' must actually be u_long.)
+ *
+ * These are used in the multiply code, to split a longword into upper
+ * and lower halves, and to reassemble a product as a quad_t, shifted left
+ * (sizeof(long)*CHAR_BIT/2).
+ */
+#define	HHALF(x)	((x) >> HALF_BITS)
+#define	LHALF(x)	((x) & ((1 << HALF_BITS) - 1))
+#define	LHUP(x)		((x) << HALF_BITS)
+
+quad_t		__divdi3(quad_t a, quad_t b);
+quad_t		__moddi3(quad_t a, quad_t b);
+u_quad_t	__qdivrem(u_quad_t u, u_quad_t v, u_quad_t *rem);
+u_quad_t	__udivdi3(u_quad_t a, u_quad_t b);
+u_quad_t	__umoddi3(u_quad_t a, u_quad_t b);
+
+/*
+ * XXX
+ * Compensate for gcc 1 vs gcc 2.  Gcc 1 defines ?sh?di3's second argument
+ * as u_quad_t, while gcc 2 correctly uses int.  Unfortunately, we still use
+ * both compilers.
+ */
+#if __GNUC__ >= 2
+typedef unsigned int	qshift_t;
+#else
+typedef u_quad_t	qshift_t;
+#endif