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* stdlib/longlong.h: Add count_trailing_zeros back.
This commit is contained in:
Ulrich Drepper 1999-11-23 04:15:27 +00:00
parent 1da2d51aeb
commit 62818cfd92
4 changed files with 34 additions and 6 deletions
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2
ChangeLog
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@ -1,5 +1,7 @@
1999-11-22 Ulrich Drepper <drepper@cygnus.com>
* stdlib/longlong.h: Add count_trailing_zeros back.
* stdlib/longlong.h: Update from latest egcs version.
1999-11-22 Andreas Jaeger <aj@suse.de>

2
linuxthreads_db/ChangeLog
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@ -1,5 +1,7 @@
1999-11-22 Ulrich Drepper <drepper@cygnus.com>
* td_ta_map_lwp2thr.c: Add missing brace in comparison.
* thread_dbP.h (LOG): Only print message if __td_debug is nonzero.
* td_init.c: Add __td_debug.

2
linuxthreads_db/td_ta_map_lwp2thr.c
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@ -67,7 +67,7 @@ td_ta_map_lwp2thr (const td_thragent_t *ta, lwpid_t lwpid, td_thrhandle_t *th)
if (ps_pdread (ta->ph, phc[cnt].h_descr, &pds, sizeof_descr) != PS_OK)
return TD_ERR; /* XXX Other error value? */
if (pds.p_pid ?: ps_getpid (ta->ph) == lwpid)
if ((pds.p_pid ?: ps_getpid (ta->ph)) == lwpid)
{
/* Found it. Now fill in the `td_thrhandle_t' object. */
th->th_ta_p = (td_thragent_t *) ta;

30
stdlib/longlong.h
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@ -1,5 +1,5 @@
/* longlong.h -- definitions for mixed size 32/64 bit arithmetic.
Copyright (C) 1991, 92, 94, 95, 96, 1997, 1998 Free Software Foundation, Inc.
Copyright (C) 1991,92,94,95,96,97,98,99 Free Software Foundation, Inc.
This definition file is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public
@ -51,14 +51,17 @@
the msb to the first non-zero bit. This is the number of steps X
needs to be shifted left to set the msb. Undefined for X == 0.
6) add_ssaaaa(high_sum, low_sum, high_addend_1, low_addend_1,
6) count_trailing_zeros(count, x) like count_leading_zeros, but counts
from the least significant end.
7) add_ssaaaa(high_sum, low_sum, high_addend_1, low_addend_1,
high_addend_2, low_addend_2) adds two two-word unsigned integers,
composed by HIGH_ADDEND_1 and LOW_ADDEND_1, and HIGH_ADDEND_2 and
LOW_ADDEND_2 respectively. The result is placed in HIGH_SUM and
LOW_SUM. Overflow (i.e. carry out) is not stored anywhere, and is
lost.
7) sub_ddmmss(high_difference, low_difference, high_minuend,
8) sub_ddmmss(high_difference, low_difference, high_minuend,
low_minuend, high_subtrahend, low_subtrahend) subtracts two
two-word unsigned integers, composed by HIGH_MINUEND_1 and
LOW_MINUEND_1, and HIGH_SUBTRAHEND_2 and LOW_SUBTRAHEND_2
@ -373,6 +376,8 @@ UDItype __umulsidi3 (USItype, USItype);
: "=r" (__cbtmp) : "rm" ((USItype) (x))); \
(count) = __cbtmp ^ 31; \
} while (0)
#define count_trailing_zeros(count, x) \
__asm__ ("bsfl %1,%0" : "=r" (count) : "rm" ((USItype)(x)))
#define UMUL_TIME 40
#define UDIV_TIME 40
#endif /* 80x86 */
@ -663,6 +668,13 @@ UDItype __umulsidi3 (USItype, USItype);
: "0" (__xx.__ll), \
"g" ((USItype) (d))); \
(r) = __xx.__i.__l; (q) = __xx.__i.__h; })
#define count_trailing_zeros(count,x) \
do {
__asm__ ("ffsd %2,%0" \
: "=r" ((USItype) (count)) \
: "0" ((USItype) 0), \
"r" ((USItype) (x))); \
} while (0)
#endif /* __ns32000__ */
#if (defined (_ARCH_PPC) || defined (_IBMR2)) && W_TYPE_SIZE == 32
@ -1253,6 +1265,18 @@ extern const UQItype __clz_tab[];
} while (0)
#endif
#if !defined (count_trailing_zeros)
/* Define count_trailing_zeros using count_leading_zeros. The latter might be
defined in asm, but if it is not, the C version above is good enough. */
#define count_trailing_zeros(count, x) \
do { \
USItype __ctz_x = (x); \
USItype __ctz_c; \
count_leading_zeros (__ctz_c, __ctz_x & -__ctz_x); \
(count) = SI_TYPE_SIZE - 1 - __ctz_c; \
} while (0)
#endif
#ifndef UDIV_NEEDS_NORMALIZATION
#define UDIV_NEEDS_NORMALIZATION 0
#endif