mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-24 11:41:07 +00:00
6f322a8947
This patch moves the HIGH_ORDER_BIT_IS_SET_FOR_SNAN macro from being defined or undefined to the preferred convention of always being defined, to either 0 or 1, so allowing typo-proof tests with #if. The macro is moved from math_private.h to a new header nan-high-order-bit.h to make it easy for all architectures to define, either through the sysdeps/generic version of the header or through providing their own version of the header, without needing #ifndef in the generic math_private.h to give a default definition. The move also allows the macro to be used without needing math_private.h to be included; the immediate motivation of this patch is to allow tests to access this information (to know what kinds of NaNs 0 is a valid payload for) without needing to include math_private.h. Existing C level rather than preprocessor conditionals at all, but this patch does not make such a change). Tested for x86_64 and x86 (testsuite); also verified for x86_64, x86, mips64 and powerpc that installed stripped shared libraries are unchanged by the patch. * sysdeps/generic/nan-high-order-bit.h: New file. * sysdeps/hppa/nan-high-order-bit.h: Likewise. * sysdeps/mips/nan-high-order-bit.h: Likewise. * sysdeps/hppa/math_private.h: Remove file. * sysdeps/mips/math_private.h (HIGH_ORDER_BIT_IS_SET_FOR_SNAN): Do not define here. * sysdeps/ieee754/dbl-64/s_issignaling.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/dbl-64/s_totalorder.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/dbl-64/s_totalordermag.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/dbl-64/wordsize-64/s_issignaling.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/dbl-64/wordsize-64/s_totalorder.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/dbl-64/wordsize-64/s_totalordermag.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/flt-32/s_issignalingf.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/flt-32/s_totalorderf.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/flt-32/s_totalordermagf.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/ldbl-128/s_issignalingl.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/ldbl-128/s_totalorderl.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/ldbl-128/s_totalordermagl.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/ldbl-128ibm/s_issignalingl.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/ldbl-128ibm/s_totalorderl.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/ldbl-128ibm/s_totalordermagl.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/ldbl-96/s_issignalingl.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/ldbl-96/s_totalorderl.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef. * sysdeps/ieee754/ldbl-96/s_totalordermagl.c: Include <nan-high-order-bit.h>. [HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef.
28 lines
1.1 KiB
C
28 lines
1.1 KiB
C
/* Specify NaN high-order bit conventions. Generic version.
|
|
Copyright (C) 2016 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef NAN_HIGH_ORDER_BIT_H
|
|
#define NAN_HIGH_ORDER_BIT_H 1
|
|
|
|
/* Define this macro to 1 if the high-order bit of a NaN's mantissa is
|
|
set for signaling NaNs and clear for quiet NaNs, 0 otherwise (the
|
|
preferred IEEE convention). */
|
|
#define HIGH_ORDER_BIT_IS_SET_FOR_SNAN 0
|
|
|
|
#endif /* nan-high-order-bit.h */
|