Merge commit 'origin/master' into nptl

Signed-off-by: Austin Foxley <austinf@cetoncorp.com>

18 files changed, 115 insertions, 58 deletions

diff --git a/Makefile.in b/Makefile.in
index 31c1754cd..c89d6fedd 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -264,7 +264,7 @@ HEADERS_RM-$(UCLIBC_HAS_BSD_ERR)             += err.h
 HEADERS_RM-$(UCLIBC_HAS_CRYPT)               += crypt.h
 HEADERS_RM-$(UCLIBC_HAS_EPOLL)               += sys/epoll.h
 HEADERS_RM-$(UCLIBC_HAS_FENV)                += fenv.h bits/fenv.h bits/fenvinline.h
-HEADERS_RM-$(if $(findstring y,$(UCLIBC_HAS_FTW)$(UCLIBC_HAS_NFTW)),,y) += ftw.h
+HEADERS_RM-$(findstring y,$(UCLIBC_HAS_FTW)$(UCLIBC_HAS_NFTW))  += ftw.h
 HEADERS_RM-$(UCLIBC_HAS_GETTEXT_AWARENESS)   += libintl.h
 HEADERS_RM-$(UCLIBC_HAS_GLIBC_CUSTOM_PRINTF) += printf.h
 HEADERS_RM-$(UCLIBC_HAS_GLOB)                += glob.h
diff --git a/extra/config/Makefile b/extra/config/Makefile
index 04175e541..ce406adc2 100644
--- a/extra/config/Makefile
+++ b/extra/config/Makefile
@@ -74,7 +74,7 @@ $(obj)/%:: $(top_srcdir)$(src)/%_shipped
 	$(Q)cat $< > $@
 endif
 menuconfig_clean:
-	$(do_rm) $(clean-files) conf $(wildcard *.o)
+	$(do_rm) $(clean-files) $(lxdialog) conf $(wildcard *.o)
 distclean: clean
 	$(do_rm) $(lxdialog) $(conf-objs) $(mconf-objs) \
 		$(kxgettext-objs) \
diff --git a/include/resolv.h b/include/resolv.h
index e0cd35db1..6f69806c4 100644
--- a/include/resolv.h
+++ b/include/resolv.h
@@ -114,22 +114,20 @@ typedef res_sendhookact (*res_send_rhook) (const struct sockaddr_in *ns,
  * I guess it's safe to set that to N.
  */
 struct __res_state {
-#ifdef __UCLIBC_HAS_COMPAT_RES_STATE__
-	int	retrans;		/* retransmission time interval */
-	int	retry;			/* number of times to retransmit */
-#endif
+	/*int retrans, retry; - moved, was here */
 	u_int32_t options;		/* (was: ulong) option flags - see below. */
 	struct sockaddr_in nsaddr_list[MAXNS]; /* address of name server */
 #define nsaddr nsaddr_list[0]		/* for backward compatibility */
 	char	*dnsrch[MAXDNSRCH + 1];	/* components of domain to search */
+	/*char defdname[256]; - moved, was here */
+	u_int8_t nscount;		/* (was: int) number of name servers */
+	u_int8_t ndots;			/* (was: unsigned:4) threshold for initial abs. query */
+	u_int8_t retrans;		/* (was: int) retransmission time interval */
+	u_int8_t retry;			/* (was: int) number of times to retransmit */
 #ifdef __UCLIBC_HAS_COMPAT_RES_STATE__
 	/* googling for "_res.defdname" says it's still sometimes used.
 	 * Pity. It's huge, I want to move it to EXTRA_COMPAT... */
 	char	defdname[256];		/* default domain (deprecated) */
-#endif
-	u_int8_t nscount;		/* (was: int) number of name servers */
-	u_int8_t ndots;			/* (was: unsigned:4) threshold for initial abs. query */
-#ifdef __UCLIBC_HAS_COMPAT_RES_STATE__
 	u_int8_t nsort;			/* (was: unsigned:4) number of elements in sort_list[] */
 	u_int16_t pfcode;		/* (was: ulong) RES_PRF_ flags. Used by dig. */
 	unsigned short id;		/* current message id */
diff --git a/ldso/include/ldso.h b/ldso/include/ldso.h
index 99dcf839c..e5669057c 100644
--- a/ldso/include/ldso.h
+++ b/ldso/include/ldso.h
@@ -72,6 +72,11 @@ extern char *_dl_ldsopath;             /* Where the shared lib loader was found
 extern const char *_dl_progname;       /* The name of the executable being run */
 extern size_t _dl_pagesize;            /* Store the page size for use later */
 
+#ifdef USE_TLS
+extern void _dl_add_to_slotinfo (struct link_map  *l);
+extern void ** __attribute__ ((const)) _dl_initial_error_catch_tsd (void);
+#endif
+
 #ifdef __SUPPORT_LD_DEBUG__
 extern char *_dl_debug;
 extern char *_dl_debug_symbols;
diff --git a/libc/inet/resolv.c b/libc/inet/resolv.c
index ee1323e76..0a6fd7aaf 100644
--- a/libc/inet/resolv.c
+++ b/libc/inet/resolv.c
@@ -407,6 +407,8 @@ __UCLIBC_MUTEX_EXTERN(__resolv_lock);
 /* Protected by __resolv_lock */
 extern void (*__res_sync)(void) attribute_hidden;
 /*extern uint32_t __resolv_opts attribute_hidden; */
+extern uint8_t __resolv_timeout attribute_hidden;
+extern uint8_t __resolv_attempts attribute_hidden;
 extern unsigned __nameservers attribute_hidden;
 extern unsigned __searchdomains attribute_hidden;
 extern sockaddr46_t *__nameserver attribute_hidden;
@@ -499,7 +501,7 @@ extern void __close_nameservers(void) attribute_hidden;
  *		Allows addresses returned by gethostbyname to be sorted.
  *		Not supported.
  * options option[ option]...
- *		(so far we support none)
+ *		(so far we support timeout:n and attempts:n)
  *		$RES_OPTIONS (space-separated list) is to be added to "options"
  *  debug	sets RES_DEBUG in _res.options
  *  ndots:n	how many dots there should be so that name will be tried
@@ -526,7 +528,7 @@ extern void __close_nameservers(void) attribute_hidden;
  *
  * We will read and analyze /etc/resolv.conf as needed before
  * we do a DNS request. This happens in __dns_lookup.
- * (TODO: also re-parse it after a timeout, to catch updates).
+ * It is reread if its mtime is changed.
  *
  * BSD has res_init routine which is used to initialize resolver state
  * which is held in global structure _res.
@@ -903,6 +905,8 @@ __UCLIBC_MUTEX_INIT(__resolv_lock, PTHREAD_MUTEX_INITIALIZER);
 /* Protected by __resolv_lock */
 void (*__res_sync)(void);
 /*uint32_t __resolv_opts; */
+uint8_t __resolv_timeout;
+uint8_t __resolv_attempts;
 unsigned __nameservers;
 unsigned __searchdomains;
 sockaddr46_t *__nameserver;
@@ -970,6 +974,9 @@ void attribute_hidden __open_nameservers(void)
 	if (__nameservers)
 		goto sync;
 
+	__resolv_timeout = RES_TIMEOUT;
+	__resolv_attempts = RES_DFLRETRY;
+
 	fp = fopen("/etc/resolv.conf", "r");
 #ifdef FALLBACK_TO_CONFIG_RESOLVCONF
 	if (!fp) {
@@ -1048,7 +1055,24 @@ void attribute_hidden __open_nameservers(void)
 				continue;
 			}
 			/* if (strcmp(keyword, "sortlist") == 0)... */
-			/* if (strcmp(keyword, "options") == 0)... */
+			if (strcmp(keyword, "options") == 0) {
+				char *p1;
+				uint8_t *what;
+
+				if (p == NULL || (p1 = strchr(p, ':')) == NULL)
+					continue;
+				*p1++ = '\0';
+				if (p1 == NULL)
+					continue;
+				if (strcmp(p, "timeout") == 0)
+					what = &__resolv_timeout;
+				else if (strcmp(p, "attempts") == 0)
+					what = &__resolv_attempts;
+				else
+					continue;
+				*what = atoi(p1);
+				DPRINTF("option %s:%d\n", p, *what);
+			}
 		}
 		fclose(fp);
 	}
@@ -1285,8 +1309,7 @@ int attribute_hidden __dns_lookup(const char *name,
 			local_ns_num = 0;
 			if (_res.options & RES_ROTATE) */
 				local_ns_num = last_ns_num;
-/*TODO: use _res.retry */
-			retries_left = __nameservers * RES_DFLRETRY;
+			retries_left = __nameservers * __resolv_attempts;
 		}
 		retries_left--;
 		if (local_ns_num >= __nameservers)
@@ -1345,8 +1368,7 @@ int attribute_hidden __dns_lookup(const char *name,
 		send(fd, packet, packet_len, 0);
 
 #ifdef USE_SELECT
-/*TODO: use _res.retrans*/
-		reply_timeout = RES_TIMEOUT;
+		reply_timeout = __resolv_timeout;
  wait_again:
 		FD_ZERO(&fds);
 		FD_SET(fd, &fds);
@@ -1360,7 +1382,7 @@ int attribute_hidden __dns_lookup(const char *name,
 		}
 		reply_timeout--;
 #else
-		reply_timeout = RES_TIMEOUT * 1000;
+		reply_timeout = __resolv_timeout * 1000;
  wait_again:
 		fds.fd = fd;
 		fds.events = POLLIN;
@@ -2878,6 +2900,8 @@ static void res_sync_func(void)
 			__nameserver[n].sa4 = rp->nsaddr_list[n]; /* struct copy */
 #endif
 	}
+	__resolv_timeout = rp->retrans;
+	__resolv_attempts = rp->retry;
 	/* Extend and comment what program is known
 	 * to use which _res.XXX member(s).
 
@@ -2904,13 +2928,17 @@ int res_init(void)
 
 	memset(rp, 0, sizeof(*rp));
 	rp->options = RES_INIT;
-#ifdef __UCLIBC_HAS_COMPAT_RES_STATE__
 	rp->retrans = RES_TIMEOUT;
-	rp->retry = 4;
-/*TODO: pulls in largish static buffers... use simpler one? */
-	rp->id = random();
-#endif
+	rp->retry = RES_DFLRETRY;
 	rp->ndots = 1;
+#ifdef __UCLIBC_HAS_COMPAT_RES_STATE__
+	/* Was: "rp->id = random();" but:
+	 * - random() pulls in largish static buffers
+	 * - isn't actually random unless, say, srandom(time(NULL)) was called
+	 * - is not used by uclibc anyway :)
+	 */
+	/* rp->id = 0; - memset did it */
+#endif
 #ifdef __UCLIBC_HAS_EXTRA_COMPAT_RES_STATE__
 	rp->_vcsock = -1;
 #endif
diff --git a/libc/misc/internals/__uClibc_main.c b/libc/misc/internals/__uClibc_main.c
index c5feedeba..f7e45c60c 100644
--- a/libc/misc/internals/__uClibc_main.c
+++ b/libc/misc/internals/__uClibc_main.c
@@ -179,11 +179,9 @@ extern void __uClibc_init(void);
 libc_hidden_proto(__uClibc_init)
 void __uClibc_init(void)
 {
-    static smallint been_there_done_that;
-
-    if (been_there_done_that)
+    /* Don't recurse */
+    if (__pagesize)
 	return;
-    been_there_done_that++;
 
     /* Setup an initial value.  This may not be perfect, but is
      * better than  malloc using __pagesize=0 for atexit, ctors, etc.  */
diff --git a/libc/misc/time/ftime.c b/libc/misc/time/ftime.c
index b2273860c..ff78d418a 100644
--- a/libc/misc/time/ftime.c
+++ b/libc/misc/time/ftime.c
@@ -25,8 +25,10 @@ int ftime(struct timeb *timebuf)
 	struct timeval tv;
 	struct timezone tz;
 
-	if (gettimeofday (&tv, &tz) < 0)
-		return -1;
+	/* In Linux, gettimeofday fails only on bad parameter.
+	 * We know that here parameters aren't bad.
+	 */
+	gettimeofday (&tv, &tz);
 
 	timebuf->time = tv.tv_sec;
 	timebuf->millitm = (tv.tv_usec + 999) / 1000;
diff --git a/libc/sysdeps/linux/common/bits/syscalls-common.h b/libc/sysdeps/linux/common/bits/syscalls-common.h
index 78bbf6c22..5e4e350c5 100644
--- a/libc/sysdeps/linux/common/bits/syscalls-common.h
+++ b/libc/sysdeps/linux/common/bits/syscalls-common.h
@@ -33,6 +33,9 @@
 #ifndef INLINE_SYSCALL
 # define INLINE_SYSCALL(name, nr, args...) INLINE_SYSCALL_NCS(__NR_##name, nr, args)
 #endif
+#ifndef INLINE_SYSCALL_NOERR
+# define INLINE_SYSCALL_NOERR(name, nr, args...) INLINE_SYSCALL_NOERR_NCS(__NR_##name, nr, args)
+#endif
 
 /* Just like INLINE_SYSCALL(), but take a non-constant syscall (NCS) argument */
 #ifndef INLINE_SYSCALL_NCS
@@ -47,6 +50,14 @@
 	__res;								\
 })
 #endif
+#ifndef INLINE_SYSCALL_NOERR_NCS
+# define INLINE_SYSCALL_NOERR_NCS(name, nr, args...)			\
+({									\
+	INTERNAL_SYSCALL_DECL(__err);					\
+	long __res = INTERNAL_SYSCALL_NCS(name, __err, nr, args);	\
+	__res;								\
+})
+#endif
 
 /* No point in forcing people to implement both when they only need one */
 #ifndef INTERNAL_SYSCALL
@@ -80,8 +91,14 @@ type name(C_DECL_ARGS_##nargs(args)) {					\
 	return (type)INLINE_SYSCALL(name, nargs, C_ARGS_##nargs(args));	\
 }
 
+#define SYSCALL_NOERR_FUNC(nargs, type, name, args...)			\
+type name(C_DECL_ARGS_##nargs(args)) {					\
+	return (type)INLINE_SYSCALL_NOERR(name, nargs, C_ARGS_##nargs(args));	\
+}
+
 #define _syscall0(args...)		SYSCALL_FUNC(0, args)
 #define _syscall1(args...)		SYSCALL_FUNC(1, args)
+#define _syscall_noerr1(args...)	SYSCALL_NOERR_FUNC(1, args)
 #define _syscall2(args...)		SYSCALL_FUNC(2, args)
 #define _syscall3(args...)		SYSCALL_FUNC(3, args)
 #define _syscall4(args...)		SYSCALL_FUNC(4, args)
diff --git a/libc/sysdeps/linux/common/clock_gettime.c b/libc/sysdeps/linux/common/clock_gettime.c
index 888cd64b0..d3755a7a8 100644
--- a/libc/sysdeps/linux/common/clock_gettime.c
+++ b/libc/sysdeps/linux/common/clock_gettime.c
@@ -23,10 +23,12 @@ int clock_gettime(clockid_t clock_id, struct timespec* tp)
 
 	switch (clock_id) {
 		case CLOCK_REALTIME:
-			retval = gettimeofday(&tv, NULL);
-			if (retval == 0) {
-				TIMEVAL_TO_TIMESPEC(&tv, tp);
-			}
+			/* In Linux, gettimeofday fails only on bad parameter.
+			 * We know that here parameter isn't bad.
+			 */
+			gettimeofday(&tv, NULL);
+			TIMEVAL_TO_TIMESPEC(&tv, tp);
+			retval = 0;
 			break;
 
 		default:
diff --git a/libc/sysdeps/linux/common/prctl.c b/libc/sysdeps/linux/common/prctl.c
index a6764c532..39c0d4fb0 100644
--- a/libc/sysdeps/linux/common/prctl.c
+++ b/libc/sysdeps/linux/common/prctl.c
@@ -13,5 +13,5 @@
 
 #ifdef __NR_prctl
 extern int prctl (int, long, long, long, long);
-_syscall5(int, prctl, int, option, long, arg2, long, arg3, long, arg4, long, arg5)
+_syscall5(int, prctl, int, option, long, _a2, long, _a3, long, _a4, long, _a5)
 #endif
diff --git a/libc/sysdeps/linux/common/time.c b/libc/sysdeps/linux/common/time.c
index 0d9e412bf..e13b44f4d 100644
--- a/libc/sysdeps/linux/common/time.c
+++ b/libc/sysdeps/linux/common/time.c
@@ -13,19 +13,18 @@
 
 
 #ifdef __NR_time
-_syscall1(time_t, time, time_t *, t)
+_syscall_noerr1(time_t, time, time_t *, t)
 #else
-
 time_t time(time_t * t)
 {
 	time_t result;
 	struct timeval tv;
 
-	if (gettimeofday(&tv, (struct timezone *) NULL)) {
-		result = (time_t) - 1;
-	} else {
-		result = (time_t) tv.tv_sec;
-	}
+	/* In Linux, gettimeofday fails only on bad parameter.
+	 * We know that here parameter isn't bad.
+	 */
+	gettimeofday(&tv, NULL);
+	result = (time_t) tv.tv_sec;
 	if (t != NULL) {
 		*t = result;
 	}
diff --git a/libc/sysdeps/linux/common/times.c b/libc/sysdeps/linux/common/times.c
index e71d1bd71..37ae040d4 100644
--- a/libc/sysdeps/linux/common/times.c
+++ b/libc/sysdeps/linux/common/times.c
@@ -11,5 +11,5 @@
 #include <sys/times.h>
 
 
-_syscall1(clock_t, times, struct tms *, buf)
+_syscall_noerr1(clock_t, times, struct tms *, buf)
 libc_hidden_def(times)
diff --git a/libc/sysdeps/linux/powerpc/bits/sysdep.h b/libc/sysdeps/linux/powerpc/bits/sysdep.h
index c42efbabd..478ebdd7a 100644
--- a/libc/sysdeps/linux/powerpc/bits/sysdep.h
+++ b/libc/sysdeps/linux/powerpc/bits/sysdep.h
@@ -182,7 +182,6 @@
 # undef INTERNAL_SYSCALL_DECL
 # define INTERNAL_SYSCALL_DECL(err) long int err
 
-# undef INTERNAL_SYSCALL
 # define INTERNAL_SYSCALL_NCS(name, err, nr, args...)			\
   ({									\
     register long int r0  __asm__ ("r0");				\
@@ -196,7 +195,7 @@
     register long int r10 __asm__ ("r10");				\
     register long int r11 __asm__ ("r11");				\
     register long int r12 __asm__ ("r12");				\
-    LOADARGS_##nr(name, args);					\
+    LOADARGS_##nr(name, args);						\
     __asm__ __volatile__						\
       ("sc   \n\t"							\
        "mfcr %0"							\
@@ -208,6 +207,7 @@
     err = r0;								\
     (int) r3;								\
   })
+# undef INTERNAL_SYSCALL
 # define INTERNAL_SYSCALL(name, err, nr, args...) \
   INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, ##args)
 
@@ -218,11 +218,11 @@
 # undef INTERNAL_SYSCALL_ERRNO
 # define INTERNAL_SYSCALL_ERRNO(val, err)     (val)
 
-# define LOADARGS_0(name, dummy)					      \
+# define LOADARGS_0(name, dummy) \
 	r0 = name
 # define LOADARGS_1(name, __arg1) \
-	long int arg1 = (long int) (__arg1);	\
-  LOADARGS_0(name, 0);					   \
+	long int arg1 = (long int) (__arg1); \
+	LOADARGS_0(name, 0); \
 	extern void __illegally_sized_syscall_arg1 (void); \
 	if (__builtin_classify_type (__arg1) != 5 && sizeof (__arg1) > 4) \
 	  __illegally_sized_syscall_arg1 (); \
diff --git a/libc/sysdeps/linux/sparc/sigaction.c b/libc/sysdeps/linux/sparc/sigaction.c
index a22ac40af..7140fd3a4 100644
--- a/libc/sysdeps/linux/sparc/sigaction.c
+++ b/libc/sysdeps/linux/sparc/sigaction.c
@@ -34,7 +34,8 @@ _syscall5(int, rt_sigaction, int, a, int, b, int, c, int, d, int, e);
 static void __rt_sigreturn_stub(void);
 static void __sigreturn_stub(void);
 
-int __libc_sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
+libc_hidden_proto(sigaction)
+int sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
 {
 	int ret;
 	struct sigaction kact, koact;
@@ -65,10 +66,8 @@ int __libc_sigaction(int sig, const struct sigaction *act, struct sigaction *oac
 	return ret;
 }
 
-#ifndef LIBC_SIGACTION
-weak_alias(__libc_sigaction,sigaction)
-libc_hidden_weak(sigaction)
-#endif
+libc_hidden_def(sigaction)
+weak_alias(sigaction,__libc_sigaction)
 
 static void
 __rt_sigreturn_stub(void)
diff --git a/libm/Makefile.in b/libm/Makefile.in
index 56b2d76c3..6eb935851 100644
--- a/libm/Makefile.in
+++ b/libm/Makefile.in
@@ -75,7 +75,7 @@ libm_CSRC := \
 	s_remquo.c w_exp2.c
 
 # Not implemented [yet?], see comment in float_wrappers.c:
-# exp2f.o fdimf.o fmaf.o fmaxf.o fminf.o log2f.o
+# fdimf.o fmaf.o fmaxf.o fminf.o
 # nearbyintf.o remquof.o scalblnf.o tgammaf.o
 FL_MOBJ := \
 	acosf.o \
@@ -93,6 +93,7 @@ FL_MOBJ := \
 	coshf.o \
 	erfcf.o \
 	erff.o \
+	exp2f.o \
 	expf.o \
 	expm1f.o \
 	fabsf.o \
@@ -108,6 +109,7 @@ FL_MOBJ := \
 	llroundf.o \
 	log10f.o \
 	log1pf.o \
+	log2f.o \
 	logbf.o \
 	logf.o \
 	lrintf.o \
diff --git a/libm/float_wrappers.c b/libm/float_wrappers.c
index 93d56c3c9..a13aac93a 100644
--- a/libm/float_wrappers.c
+++ b/libm/float_wrappers.c
@@ -40,13 +40,12 @@ long long func##f (float x) \
 
 
 /* For the time being, do _NOT_ implement these functions
- * that are defined by SuSv3 [why?] */
-#undef L_exp2f         /*float       exp2f(float);*/
+ * that are defined by SuSv3 [because we don't need them
+ * and nobody asked to include them] */
 #undef L_fdimf         /*float       fdimf(float, float);*/
 #undef L_fmaf          /*float       fmaf(float, float, float);*/
 #undef L_fmaxf         /*float       fmaxf(float, float);*/
 #undef L_fminf         /*float       fminf(float, float);*/
-#undef L_log2f         /*float       log2f(float);*/
 #undef L_nearbyintf    /*float       nearbyintf(float);*/
 #undef L_nexttowardf   /*float       nexttowardf(float, long double);*/
 #undef L_remquof       /*float       remquof(float, float, int *);*/
@@ -70,6 +69,7 @@ float       cosf(float);
 float       coshf(float);
 float       erfcf(float);
 float       erff(float);
+float       exp2f(float);
 float       expf(float);
 float       expm1f(float);
 float       fabsf(float);
@@ -83,6 +83,7 @@ float       lgammaf(float);
 long long   llroundf(float);
 float       log10f(float);
 float       log1pf(float);
+float       log2f(float);
 float       logbf(float);
 float       logf(float);
 long        lroundf(float);
diff --git a/test/inet/gethostid.c b/test/inet/gethostid.c
new file mode 100644
index 000000000..295166536
--- /dev/null
+++ b/test/inet/gethostid.c
@@ -0,0 +1,6 @@
+#include <unistd.h>
+#include <stdio.h>
+int main(void) {
+	printf("hostid=%d\n", gethostid());
+	return 0;
+}
diff --git a/test/math/compile_test.c b/test/math/compile_test.c
index 61488857a..ab8c40c48 100644
--- a/test/math/compile_test.c
+++ b/test/math/compile_test.c
@@ -18,7 +18,7 @@ r += cosf(float_x);
 r += coshf(float_x);
 r += erfcf(float_x);
 r += erff(float_x);
-/*r += exp2f(float_x); - uclibc does not have it (yet?) */
+r += exp2f(float_x);
 r += expf(float_x);
 r += expm1f(float_x);
 r += fabsf(float_x);
@@ -38,7 +38,7 @@ r += llrintf(float_x);
 r += llroundf(float_x);
 r += log10f(float_x);
 r += log1pf(float_x);
-/*r += log2f(float_x); - uclibc does not have it (yet?) */
+r += log2f(float_x);
 r += logbf(float_x);
 r += logf(float_x);
 r += lrintf(float_x);