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patches/glibc/ports-2.10.1/210-ldbl-nexttowardf.patch
author Anthony Foiani <anthony.foiani@gmail.com>
Thu Oct 07 22:37:06 2010 +0200 (2010-10-07)
changeset 2138 2242d87c5404
permissions -rw-r--r--
scripts: always create lib32 and lib64 symlinks

Unconditionally create the lib32 -> lib/ and lib64 -> lib/ symlinks.

This is reportedly a fix to build a toolchain for a 32-bit target on
a 'pure' 64-bit host (eg. on Fedora FC12, host libs are in lib64/,
and there is no lib -> lib64 symlink, as we can see on other distors,
as Debian). As gcc only puts static host lib in lib64/ (along with
target files in subdirs), we can safely create the symlinks.

Also note that the symlinks are summarily removed at the end
of the build.

Signed-off-by: Anthony Foiani <anthony.foiani@gmail.com>
[Yann E. MORIN: fix a comment, rephrase the commit log]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> 
     1 ripped from Debian

     2 

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

     4 

     5 2008-05-05  Aurelien Jarno  <aurelien@aurel32.net>

     6 

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

     8 	(__nexttowardf): Use math_opt_barrier and

     9 	math_force_eval macros.  If FLT_EVAL_METHOD is not 0, force

    10 	x to float using asm.

    11 

    12  sysdeps/ieee754/ldbl-128/s_nexttowardf.c |   26 ++++++++++++++++----------

    13  1 file changed, 16 insertions(+), 10 deletions(-)

    14 

    15 diff -durN glibc-2.10.1.orig/sysdeps/ieee754/ldbl-128/s_nexttowardf.c glibc-2.10.1/sysdeps/ieee754/ldbl-128/s_nexttowardf.c

    16 --- glibc-2.10.1.orig/sysdeps/ieee754/ldbl-128/s_nexttowardf.c	1999-07-14 02:09:42.000000000 +0200

    17 +++ glibc-2.10.1/sysdeps/ieee754/ldbl-128/s_nexttowardf.c	2009-11-13 00:50:06.000000000 +0100

    18 @@ -19,7 +19,8 @@

    19  #endif

    20  

    21  #include "math.h"

    22 -#include "math_private.h"

    23 +#include <math_private.h>

    24 +#include <float.h>

    25  

    26  #ifdef __STDC__

    27  	float __nexttowardf(float x, long double y)

    28 @@ -44,10 +45,12 @@

    29  	   return x+y;

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

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

    32 -	    float x2;

    33 +	    float u;

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

    35 -	    x2 = x*x;

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

    37 +	    u = math_opt_barrier (x);

    38 +	    u = u * u;

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

    40 +	    return x;

    41  	}

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

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

    44 @@ -67,13 +70,16 @@

    45  	    }

    46  	}

    47  	hy = hx&0x7f800000;

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

    49 +	if(hy>=0x7f800000) {

    50 +	  x = x+x;	/* overflow  */

    51 +	  if (FLT_EVAL_METHOD != 0)

    52 +	    /* Force conversion to float.  */

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

    54 +	  return x;

    55 +	}

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

    57 -	    float x2 = x*x;

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

    59 -	        SET_FLOAT_WORD(x2,hx);

    60 -		return x2;

    61 -	    }

    62 +	    float u = x*x;

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

    64  	}

    65  	SET_FLOAT_WORD(x,hx);

    66  	return x;
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