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patches/glibc/2.9/270-ldbl-nexttowardf.patch
author "Yann E. MORIN" <yann.morin.1998@free.fr>
Wed Dec 05 20:31:43 2012 +0100 (2012-12-05)
changeset 3134 863723936e24
parent 1201 c9967a6e3b25
permissions -rw-r--r--
scripts/xldd: use user's sed and grep

xldd uses sed and grep as detected by ./configure. This works well if is
used on the machine that build the toolchain.

But if the user moves the toolchain to another machine where sed and grep
are not in the same directory (eg. /bin/sed vs. /usr/bin/sed), then xldd
will stop functionning.

Fix that by using ${SED} and ${GREP} if they are set in the environment.

Reported-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.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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