AuroraMiddleware/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2024-12-24 11:41:07 +00:00
Code Issues Packages Projects Releases Wiki Activity

math: Use wordsize-64 version for finite

Browse Source 
- math.h will use compiler builtin for gcc 4.4 when built without
    -fsignaling-nans and the builtin is expanded inline for all
    support architectures.  As an example, there is no intra finite
    call on libm for the architecture I checked, x86, arm, aarch64,
    and powerpc.

  - The resulting binary difference on 32 bits architecture is minimum
    for the non hotspot symbol.

  - It helps wordsize-64 architectures that use ldbl-opt.

  - It add some code simplification with reduction of duplicated
    implementations.

Checked on powerpc-linux-gnu (built without --with-cpu, with
--with-cpu=power4 and with --with-cpu=power5+ and --disable-multi-arch),
powerpc64-linux-gnu (built without --with-cp and with --with-cpu=power5+
and --disable-multi-arch).

	* sysdeps/ieee754/dbl-64/wordsize-64/s_finite.c: Move to ...
	* sysdeps/ieee754/dbl-64/s_finite.c: ... here and format code.

Reviewed-by: Gabriel F. T. Gomes <gabrielftg@linux.ibm.com>
This commit is contained in:
Adhemerval Zanella 2019-03-26 17:47:54 +00:00
parent 6427a6ac8c
commit a72186761b
3 changed files with 10 additions and 58 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
ChangeLog
View File

@ -1,5 +1,8 @@
2019-06-12 Adhemerval Zanella <adhemerval.zanella@linaro.org> 2019-06-12 Adhemerval Zanella <adhemerval.zanella@linaro.org>
* sysdeps/ieee754/dbl-64/wordsize-64/s_finite.c: Move to ...
* sysdeps/ieee754/dbl-64/s_finite.c: ... here and format code.
* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/Makefile * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/Makefile
(sysdeps_routines, libm-sysdep_routines): Remove s_isinf* and s_isinf* (sysdeps_routines, libm-sysdep_routines): Remove s_isinf* and s_isinf*
objects. objects.

22
sysdeps/ieee754/dbl-64/s_finite.c
View File

@ -1,4 +1,3 @@
/* @(#)s_finite.c 5.1 93/09/24 */
/* /*
* ==================================================== * ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
@ -10,10 +9,6 @@
* ==================================================== * ====================================================
*/ */
#if defined(LIBM_SCCS) && !defined(lint)
static char rcsid[] = "$NetBSD: s_finite.c,v 1.8 1995/05/10 20:47:17 jtc Exp $";
#endif
/* /*
* finite(x) returns 1 is x is finite, else 0; * finite(x) returns 1 is x is finite, else 0;
* no branching! * no branching!
@ -23,18 +18,15 @@ static char rcsid[] = "$NetBSD: s_finite.c,v 1.8 1995/05/10 20:47:17 jtc Exp $";
#include <math_private.h> #include <math_private.h>
#include <ldbl-classify-compat.h> #include <ldbl-classify-compat.h>
#include <shlib-compat.h> #include <shlib-compat.h>
#include <stdint.h>
#undef __finite int
__finite (double x)
#ifndef FINITE
# define FINITE __finite
#endif
int FINITE(double x)
{ {
int32_t hx; int64_t lx;
GET_HIGH_WORD (hx, x); EXTRACT_WORDS64 (lx,x);
return (int) ((uint32_t) ((hx & 0x7ff00000) - 0x7ff00000) >> 31); return (int)((uint64_t)((lx & INT64_C(0x7ff0000000000000))
- INT64_C (0x7ff0000000000000)) >> 63);
} }
hidden_def (__finite) hidden_def (__finite)
weak_alias (__finite, finite) weak_alias (__finite, finite)

43
sysdeps/ieee754/dbl-64/wordsize-64/s_finite.c
View File

@ -1,43 +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.
* ====================================================
*/
/*
* finite(x) returns 1 is x is finite, else 0;
* no branching!
*/
#include <math.h>
#include <math_private.h>
#include <ldbl-classify-compat.h>
#include <shlib-compat.h>
#include <stdint.h>
#undef __finite
int
__finite(double x)
{
int64_t lx;
EXTRACT_WORDS64(lx,x);
return (int)((uint64_t)((lx&INT64_C(0x7ff0000000000000))-INT64_C(0x7ff0000000000000))>>63);
}
hidden_def (__finite)
weak_alias (__finite, finite)
#ifdef NO_LONG_DOUBLE
# if LDBL_CLASSIFY_COMPAT
# if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_23)
compat_symbol (libc, __finite, __finitel, GLIBC_2_0);
# endif
# if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_23)
compat_symbol (libm, __finite, __finitel, GLIBC_2_1);
# endif
# endif
weak_alias (__finite, finitel)
#endif