[02/13] Always use wordsize-64 version of s_rint.c.

  This patch replaces s_rint.c in sysdeps/dbl-64 with the one in
sysdeps/dbl-64/wordsize-64 and removes the latter one.
The code is not changed except changes in code style.

Also adjusted the include path in x86_64 file.
---
 sysdeps/ieee754/dbl-64/s_rint.c             | 36 ++++++-------
 sysdeps/ieee754/dbl-64/wordsize-64/s_rint.c | 58 ---------------------
 sysdeps/x86_64/fpu/multiarch/s_rint-c.c     |  2 +-
 3 files changed, 19 insertions(+), 77 deletions(-)
 delete mode 100644 sysdeps/ieee754/dbl-64/wordsize-64/s_rint.c
  

On 02/12/2019 11:46, Stefan Liebler wrote:
> This patch replaces s_rint.c in sysdeps/dbl-64 with the one in
> sysdeps/dbl-64/wordsize-64 and removes the latter one.
> The code is not changed except changes in code style.
> 
> Also adjusted the include path in x86_64 file.

LGTM, thanks.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>

> ---
>  sysdeps/ieee754/dbl-64/s_rint.c             | 36 ++++++-------
>  sysdeps/ieee754/dbl-64/wordsize-64/s_rint.c | 58 ---------------------
>  sysdeps/x86_64/fpu/multiarch/s_rint-c.c     |  2 +-
>  3 files changed, 19 insertions(+), 77 deletions(-)
>  delete mode 100644 sysdeps/ieee754/dbl-64/wordsize-64/s_rint.c
> 
> diff --git a/sysdeps/ieee754/dbl-64/s_rint.c b/sysdeps/ieee754/dbl-64/s_rint.c
> index dd01a84176..f96078c405 100644
> --- a/sysdeps/ieee754/dbl-64/s_rint.c
> +++ b/sysdeps/ieee754/dbl-64/s_rint.c
> @@ -1,4 +1,3 @@
> -/* @(#)s_rint.c 5.1 93/09/24 */
>  /*
>   * ====================================================
>   * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
> @@ -26,38 +25,39 @@
>  #include <libm-alias-double.h>
>  
>  static const double
> -  TWO52[2] = {
> -  4.50359962737049600000e+15, /* 0x43300000, 0x00000000 */
> - -4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */
> +TWO52[2] = {
> +	    4.50359962737049600000e+15, /* 0x43300000, 0x00000000 */
> +	    -4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */
>  };
>  
>  double
>  __rint (double x)
>  {
> -  int32_t i0, j0, sx;
> -  double w, t;
> -  GET_HIGH_WORD (i0, x);
> -  sx = (i0 >> 31) & 1;
> -  j0 = ((i0 >> 20) & 0x7ff) - 0x3ff;
> +  int64_t i0, sx;
> +  int32_t j0;
> +  EXTRACT_WORDS64 (i0, x);
> +  sx = (i0 >> 63) & 1;
> +  j0 = ((i0 >> 52) & 0x7ff) - 0x3ff;
>    if (j0 < 52)
>      {
>        if (j0 < 0)
>  	{
> -	  w = TWO52[sx] + x;
> -	  t = w - TWO52[sx];
> -	  GET_HIGH_WORD (i0, t);
> -	  SET_HIGH_WORD (t, (i0 & 0x7fffffff) | (sx << 31));
> -	  return t;
> +	  double w = TWO52[sx] + x;
> +	  double t =  w - TWO52[sx];
> +	  EXTRACT_WORDS64 (i0, t);
> +	  INSERT_WORDS64 (t, (i0 & UINT64_C (0x7fffffffffffffff))
> +			  | (sx << 63));
> +      return t;
>  	}
>      }
>    else
>      {
>        if (j0 == 0x400)
> -	return x + x;                   /* inf or NaN */
> +	return x + x;			/* inf or NaN  */
>        else
> -	return x;                       /* x is integral */
> -    }
> -  w = TWO52[sx] + x;
> +	return x;			/* x is integral  */
> +  }
> +  double w = TWO52[sx] + x;
>    return w - TWO52[sx];
>  }
>  #ifndef __rint

Ok.

> diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_rint.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_rint.c
> deleted file mode 100644
> index 378b73a544..0000000000
> --- a/sysdeps/ieee754/dbl-64/wordsize-64/s_rint.c
> +++ /dev/null
> @@ -1,58 +0,0 @@
> -/*
> - * ====================================================
> - * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
> - *
> - * Developed at SunPro, a Sun Microsystems, Inc. business.
> - * Permission to use, copy, modify, and distribute this
> - * software is freely granted, provided that this notice
> - * is preserved.
> - * ====================================================
> - */
> -
> -/*
> - * rint(x)
> - * Return x rounded to integral value according to the prevailing
> - * rounding mode.
> - * Method:
> - *	Using floating addition.
> - * Exception:
> - *	Inexact flag raised if x not equal to rint(x).
> - */
> -
> -#define NO_MATH_REDIRECT
> -#include <math.h>
> -#include <math_private.h>
> -#include <libm-alias-double.h>
> -
> -static const double
> -TWO52[2]={
> -  4.50359962737049600000e+15, /* 0x43300000, 0x00000000 */
> - -4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */
> -};
> -
> -double
> -__rint(double x)
> -{
> -	int64_t i0,sx;
> -	int32_t j0;
> -	EXTRACT_WORDS64(i0,x);
> -	sx = (i0>>63)&1;
> -	j0 = ((i0>>52)&0x7ff)-0x3ff;
> -	if(j0<52) {
> -	    if(j0<0) {
> -		double w = TWO52[sx]+x;
> -		double t =  w-TWO52[sx];
> -		EXTRACT_WORDS64(i0,t);
> -		INSERT_WORDS64(t,(i0&UINT64_C(0x7fffffffffffffff))|(sx<<63));
> -		return t;
> -	    }
> -	} else {
> -	    if(j0==0x400) return x+x;	/* inf or NaN */
> -	    else return x;		/* x is integral */
> -	}
> -	double w = TWO52[sx]+x;
> -	return w-TWO52[sx];
> -}
> -#ifndef __rint
> -libm_alias_double (__rint, rint)
> -#endif

Ok.

> diff --git a/sysdeps/x86_64/fpu/multiarch/s_rint-c.c b/sysdeps/x86_64/fpu/multiarch/s_rint-c.c
> index 162a630ff9..b010150f52 100644
> --- a/sysdeps/x86_64/fpu/multiarch/s_rint-c.c
> +++ b/sysdeps/x86_64/fpu/multiarch/s_rint-c.c
> @@ -1,3 +1,3 @@
>  #undef __rint
>  #define __rint __rint_c
> -#include <sysdeps/ieee754/dbl-64/wordsize-64/s_rint.c>
> +#include <sysdeps/ieee754/dbl-64/s_rint.c>
> 

Ok.