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libm: fix some unused variable (rcsid) and dangling else warnings

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s_{fabs,fmax,logb,scalb}{,f,l}.c may be built elsewhere with a higher
WARNS setting.

Reviewed by:	ed
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D8061
This commit is contained in:
Ed Maste 2016-09-28 14:48:34 +00:00
parent 3af5cc2e50
commit dcdfa506cc
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=306409
5 changed files with 21 additions and 24 deletions
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5
lib/msun/src/s_fabs.c
View File

@ -10,9 +10,8 @@
* ====================================================
*/
#ifndef lint
static char rcsid[] = "$FreeBSD$";
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* fabs(x) returns the absolute value of x.

5
lib/msun/src/s_logbl.c
View File

@ -10,9 +10,8 @@
* ====================================================
*/
#ifndef lint
static char rcsid[] = "$FreeBSD$";
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <float.h>
#include <limits.h>

12
lib/msun/src/s_scalbn.c
View File

@ -10,9 +10,8 @@
* ====================================================
*/
#ifndef lint
static char rcsid[] = "$FreeBSD$";
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* scalbn (double x, int n)
@ -21,7 +20,6 @@ static char rcsid[] = "$FreeBSD$";
* exponentiation or a multiplication.
*/
#include <sys/cdefs.h>
#include <float.h>
#include "math.h"
@ -51,10 +49,12 @@ scalbn (double x, int n)
if (k > 0x7fe) return huge*copysign(huge,x); /* overflow */
if (k > 0) /* normal result */
{SET_HIGH_WORD(x,(hx&0x800fffff)|(k<<20)); return x;}
if (k <= -54)
if (k <= -54) {
if (n > 50000) /* in case integer overflow in n+k */
return huge*copysign(huge,x); /*overflow*/
else return tiny*copysign(tiny,x); /*underflow*/
else
return tiny*copysign(tiny,x); /*underflow*/
}
k += 54; /* subnormal result */
SET_HIGH_WORD(x,(hx&0x800fffff)|(k<<20));
return x*twom54;

11
lib/msun/src/s_scalbnf.c
View File

@ -13,11 +13,8 @@
* ====================================================
*/
#ifndef lint
static char rcsid[] = "$FreeBSD$";
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "math.h"
#include "math_private.h"
@ -46,10 +43,12 @@ scalbnf (float x, int n)
if (k > 0xfe) return huge*copysignf(huge,x); /* overflow */
if (k > 0) /* normal result */
{SET_FLOAT_WORD(x,(ix&0x807fffff)|(k<<23)); return x;}
if (k <= -25)
if (k <= -25) {
if (n > 50000) /* in case integer overflow in n+k */
return huge*copysignf(huge,x); /*overflow*/
else return tiny*copysignf(tiny,x); /*underflow*/
else
return tiny*copysignf(tiny,x); /*underflow*/
}
k += 25; /* subnormal result */
SET_FLOAT_WORD(x,(ix&0x807fffff)|(k<<23));
return x*twom25;

12
lib/msun/src/s_scalbnl.c
View File

@ -10,9 +10,8 @@
* ====================================================
*/
#ifndef lint
static char rcsid[] = "$FreeBSD$";
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* scalbnl (long double x, int n)
@ -27,7 +26,6 @@ static char rcsid[] = "$FreeBSD$";
* for scalbn(), so we don't use this routine.
*/
#include <sys/cdefs.h>
#include <float.h>
#include <math.h>
@ -59,10 +57,12 @@ scalbnl (long double x, int n)
if (k >= 0x7fff) return huge*copysignl(huge,x); /* overflow */
if (k > 0) /* normal result */
{u.bits.exp = k; return u.e;}
if (k <= -128)
if (k <= -128) {
if (n > 50000) /* in case integer overflow in n+k */
return huge*copysign(huge,x); /*overflow*/
else return tiny*copysign(tiny,x); /*underflow*/
else
return tiny*copysign(tiny,x); /*underflow*/
}
k += 128; /* subnormal result */
u.bits.exp = k;
return u.e*0x1p-128;