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patches/glibc/2.9/270-ldbl-nexttowardf.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Mon Aug 23 14:32:16 2010 +0200 (2010-08-23)
changeset 2100 f9fcfc002c8a
parent 1201 c9967a6e3b25
permissions -rw-r--r--
debug/gdb: install dependable libs in a generic target static libs dir

For now, ncurses is the only dependable target library built for gdb.
But expat is coming, and there's no reason to install each library in
its own place.

So, install ncurses in a generic directory, where other dependable
libraries can be installed as well.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> 
     1 Original patch from: gentoo/src/patchsets/glibc/2.9/1073_all_glibc-ldbl-nexttowardf.patch

     2 

     3 -= BEGIN original header =-

     4 ripped from Debian

     5 

     6 this change was made to generic __nexttowardf, but not the long double version

     7 

     8 2008-05-05  Aurelien Jarno  <aurelien@aurel32.net>

     9 

    10 	* sysdeps/ieee754/ldbl-128/s_nexttowardf.c: Include float.h.

    11 	(__nexttowardf): Use math_opt_barrier and

    12 	math_force_eval macros.  If FLT_EVAL_METHOD is not 0, force

    13 	x to float using asm.

    14 

    15 -= END original header =-

    16 

    17 diff -durN glibc-2_9.orig/sysdeps/ieee754/ldbl-128/s_nexttowardf.c glibc-2_9/sysdeps/ieee754/ldbl-128/s_nexttowardf.c

    18 --- glibc-2_9.orig/sysdeps/ieee754/ldbl-128/s_nexttowardf.c	1999-07-14 02:09:42.000000000 +0200

    19 +++ glibc-2_9/sysdeps/ieee754/ldbl-128/s_nexttowardf.c	2009-02-02 22:00:59.000000000 +0100

    20 @@ -19,7 +19,8 @@

    21  #endif

    22  

    23  #include "math.h"

    24 -#include "math_private.h"

    25 +#include <math_private.h>

    26 +#include <float.h>

    27  

    28  #ifdef __STDC__

    29  	float __nexttowardf(float x, long double y)

    30 @@ -44,10 +45,12 @@

    31  	   return x+y;

    32  	if((long double) x==y) return y;	/* x=y, return y */

    33  	if(ix==0) {				/* x == 0 */

    34 -	    float x2;

    35 +	    float u;

    36  	    SET_FLOAT_WORD(x,(u_int32_t)((hy>>32)&0x80000000)|1);/* return +-minsub*/

    37 -	    x2 = x*x;

    38 -	    if(x2==x) return x2; else return x;	/* raise underflow flag */

    39 +	    u = math_opt_barrier (x);

    40 +	    u = u * u;

    41 +	    math_force_eval (u);		/* raise underflow flag */

    42 +	    return x;

    43  	}

    44  	if(hx>=0) {				/* x > 0 */

    45  	    if(hy<0||(ix>>23)>(iy>>48)-0x3f80

    46 @@ -67,13 +70,16 @@

    47  	    }

    48  	}

    49  	hy = hx&0x7f800000;

    50 -	if(hy>=0x7f800000) return x+x;	/* overflow  */

    51 +	if(hy>=0x7f800000) {

    52 +	  x = x+x;	/* overflow  */

    53 +	  if (FLT_EVAL_METHOD != 0)

    54 +	    /* Force conversion to float.  */

    55 +	    asm ("" : "+m"(x));

    56 +	  return x;

    57 +	}

    58  	if(hy<0x00800000) {		/* underflow */

    59 -	    float x2 = x*x;

    60 -	    if(x2!=x) {		/* raise underflow flag */

    61 -	        SET_FLOAT_WORD(x2,hx);

    62 -		return x2;

    63 -	    }

    64 +	    float u = x*x;

    65 +	    math_force_eval (u);	/* raise underflow flag */

    66  	}

    67  	SET_FLOAT_WORD(x,hx);

    68  	return x;
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