From patchwork Thu Nov 24 18:48:49 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joseph Myers X-Patchwork-Id: 698980 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from sourceware.org (server1.sourceware.org [209.132.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3tPpCK63J4z9t0X for ; Fri, 25 Nov 2016 05:49:17 +1100 (AEDT) Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; secure) header.d=sourceware.org header.i=@sourceware.org header.b="Zeyp9Hwo"; dkim-atps=neutral DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:date:from:to:cc:subject:message-id :mime-version:content-type; q=dns; s=default; b=dNCONcPH24PVKHD6 KsASKUwcPXapn+lZRaz5Fh9nlevTPkQSopy4RQnkaS4SZq5bV3V2cDspWhQ5Fb2h VKkDxxttTc1+gfWV60V3DrotjEVkEGGW0BmcoF5d6TLGNpxWL2j5BRRKU6bz/OR8 MZ/oIabi4FZhjmUnHRuREjhWO4M= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:date:from:to:cc:subject:message-id :mime-version:content-type; s=default; bh=AVlZstJAU39FPnVylojA/0 3DaiI=; b=Zeyp9Hwo6s3tFIYidlo/gkB+BQcao5Q0Ziq4SHwPxejYyehtJ45M/N ht47Y7SUZK27SRldUl3BBaiTb5KXtk4UGRx3qVBVnVKab+9P4PQVOFJI54CB3iMq t/8VMDe0ScccE5AYPkl4/WpNKFn/gZkMDGicalOepghLFvWsl5H0c= Received: (qmail 75729 invoked by alias); 24 Nov 2016 18:49:10 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Delivered-To: mailing list libc-alpha@sourceware.org Received: (qmail 75717 invoked by uid 89); 24 Nov 2016 18:49:10 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=0.5 required=5.0 tests=AWL, BAYES_50, RCVD_IN_DNSWL_NONE, SPF_PASS, URIBL_RED autolearn=ham version=3.3.2 spammy=choices, (unknown), 27, 6, _float64x X-HELO: relay1.mentorg.com Date: Thu, 24 Nov 2016 18:48:49 +0000 From: Joseph Myers To: CC: , , Subject: Refactor float_t, double_t information into bits/flt-eval-method.h [committed] Message-ID: User-Agent: Alpine 2.20 (DEB 67 2015-01-07) MIME-Version: 1.0 X-ClientProxiedBy: svr-ies-mbx-01.mgc.mentorg.com (139.181.222.1) To svr-ies-mbx-01.mgc.mentorg.com (139.181.222.1) At present, definitions of float_t and double_t are split among many bits/mathdef.h headers. For all but three architectures, these types are float and double. Furthermore, if you assume __FLT_EVAL_METHOD__ to be defined, that provides a more generic way of determining the correct values of these typedefs. Defining these typedefs more generally based on __FLT_EVAL_METHOD__ was previously proposed by Paul Eggert in . This patch refactors things in the way I proposed in . A new header bits/flt-eval-method.h defines a single macro, __GLIBC_FLT_EVAL_METHOD, which is then used by math.h to define float_t and double_t. The default is based on __FLT_EVAL_METHOD__ (although actually a default to 0 would have the same effect for current ports, because ports where values other than 0 or 16 are possible all have their own headers). To avoid changing the existing semantics in any case, including for compilers not defining __FLT_EVAL_METHOD__, architecture-specific files are then added for m68k, s390, x86 which replicate the existing semantics. At least with __FLT_EVAL_METHOD__ values possible with GCC, there should be no change to the choices of float_t and double_t for any supported configuration. Architecture maintainer notes: * m68k: sysdeps/m68k/m680x0/bits/flt-eval-method.h always defines __GLIBC_FLT_EVAL_METHOD to 2 to replicate the existing logic. But actually GCC defines __FLT_EVAL_METHOD__ to 0 if TARGET_68040. It might make sense to make the header prefer to base things on __FLT_EVAL_METHOD__ if defined, like the x86 version, and so make the choices of these types more accurate (with a NEWS entry as for the other changes to these types on particular architectures). * s390: sysdeps/s390/bits/flt-eval-method.h always defines __GLIBC_FLT_EVAL_METHOD to 1 to replicate the existing logic. As previously discussed, it might make sense in coordination with GCC to eliminate the historic mistake, avoid excess precision in the -fexcess-precision=standard case and make the typedefs match (with a NEWS entry, again). Tested for x86-64 and x86. Also did compilation-only testing with build-many-glibcs.py. Committed. 2016-11-24 Joseph Myers * bits/flt-eval-method.h: New file. * sysdeps/m68k/m680x0/bits/flt-eval-method.h: Likewise. * sysdeps/s390/bits/flt-eval-method.h: Likewise. * sysdeps/x86/bits/flt-eval-method.h: Likewise. * math/Makefile (headers): Add bits/flt-eval-method.h. * math/math.h: Include . [__USE_ISOC99] (float_t): Define based on __GLIBC_FLT_EVAL_METHOD. [__USE_ISOC99] (double_t): Likewise. * bits/mathdef.h (float_t): Remove. (double_t): Likewise. * sysdeps/aarch64/bits/mathdef.h (float_t): Likewise. (double_t): Likewise. * sysdeps/alpha/bits/mathdef.h (float_t): Likewise. (double_t): Likewise. * sysdeps/arm/bits/mathdef.h (float_t): Likewise. (double_t): Likewise. * sysdeps/hppa/fpu/bits/mathdef.h (float_t): Likewise. (double_t): Likewise. * sysdeps/ia64/bits/mathdef.h (float_t): Likewise. (double_t): Likewise. * sysdeps/m68k/m680x0/bits/mathdef.h (float_t): Likewise. (double_t): Likewise. * sysdeps/mips/bits/mathdef.h (float_t): Likewise. (double_t): Likewise. * sysdeps/powerpc/bits/mathdef.h (float_t): Likewise. (double_t): Likewise. * sysdeps/s390/bits/mathdef.h (float_t): Likewise. (double_t): Likewise. * sysdeps/sh/sh4/bits/mathdef.h (float_t): Likewise. (double_t): Likewise. * sysdeps/sparc/bits/mathdef.h (float_t): Likewise. (double_t): Likewise. * sysdeps/tile/bits/mathdef.h (float_t): Likewise. (double_t): Likewise. * sysdeps/x86/bits/mathdef.h (float_t): Likewise. (double_t): Likewise. diff --git a/bits/flt-eval-method.h b/bits/flt-eval-method.h new file mode 100644 index 0000000..8ecd6a6 --- /dev/null +++ b/bits/flt-eval-method.h @@ -0,0 +1,42 @@ +/* Define __GLIBC_FLT_EVAL_METHOD. + 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 + . */ + +#ifndef _MATH_H +# error "Never use directly; include instead." +#endif + +/* __GLIBC_FLT_EVAL_METHOD is the value of FLT_EVAL_METHOD used to + determine the evaluation method typedefs such as float_t and + double_t. It must be a value from C11 or TS 18661-3:2015, and not + -1. */ + +/* In the default version of this header, follow __FLT_EVAL_METHOD__. + -1 is mapped to 2 (considering evaluation as long double to be a + conservatively safe assumption), and if __FLT_EVAL_METHOD__ is not + defined then assume there is no excess precision and use the value + 0. */ + +#ifdef __FLT_EVAL_METHOD__ +# if __FLT_EVAL_METHOD__ == -1 +# define __GLIBC_FLT_EVAL_METHOD 2 +# else +# define __GLIBC_FLT_EVAL_METHOD __FLT_EVAL_METHOD__ +# endif +#else +# define __GLIBC_FLT_EVAL_METHOD 0 +#endif diff --git a/bits/mathdef.h b/bits/mathdef.h index d557d08..6dedc51 100644 --- a/bits/mathdef.h +++ b/bits/mathdef.h @@ -22,13 +22,6 @@ #if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF # define _MATH_H_MATHDEF 1 -/* Expressions are evaluated with the range and precision of their - type. */ -typedef float float_t; /* `float' expressions are evaluated as - `float'. */ -typedef double double_t; /* `double' expressions are evaluated as - `double'. */ - /* The values returned by `ilogb' for 0 and NaN respectively. */ # define FP_ILOGB0 (-2147483647) # define FP_ILOGBNAN 2147483647 diff --git a/math/Makefile b/math/Makefile index e84f86a..576e108 100644 --- a/math/Makefile +++ b/math/Makefile @@ -27,7 +27,8 @@ headers := math.h bits/mathcalls.h bits/mathinline.h bits/huge_val.h \ fpu_control.h complex.h bits/cmathcalls.h fenv.h \ bits/fenv.h bits/fenvinline.h bits/mathdef.h tgmath.h \ bits/math-finite.h bits/math-vector.h \ - bits/libm-simd-decl-stubs.h bits/iscanonical.h + bits/libm-simd-decl-stubs.h bits/iscanonical.h \ + bits/flt-eval-method.h # FPU support code. aux := setfpucw fpu_control diff --git a/math/math.h b/math/math.h index 75ccfc3..70bf8e5 100644 --- a/math/math.h +++ b/math/math.h @@ -54,13 +54,51 @@ __BEGIN_DECLS # endif #endif -/* Get the architecture specific values describing the floating-point - evaluation. The following symbols will get defined: +/* Get __GLIBC_FLT_EVAL_METHOD. */ +#include + +#ifdef __USE_ISOC99 +/* Define the following typedefs. float_t floating-point type at least as wide as `float' used to evaluate `float' expressions double_t floating-point type at least as wide as `double' used to evaluate `double' expressions +*/ +# if __GLIBC_FLT_EVAL_METHOD == 0 || __GLIBC_FLT_EVAL_METHOD == 16 +typedef float float_t; +typedef double double_t; +# elif __GLIBC_FLT_EVAL_METHOD == 1 +typedef double float_t; +typedef double double_t; +# elif __GLIBC_FLT_EVAL_METHOD == 2 +typedef long double float_t; +typedef long double double_t; +# elif __GLIBC_FLT_EVAL_METHOD == 32 +typedef _Float32 float_t; +typedef double double_t; +# elif __GLIBC_FLT_EVAL_METHOD == 33 +typedef _Float32x float_t; +typedef _Float32x double_t; +# elif __GLIBC_FLT_EVAL_METHOD == 64 +typedef _Float64 float_t; +typedef _Float64 double_t; +# elif __GLIBC_FLT_EVAL_METHOD == 65 +typedef _Float64x float_t; +typedef _Float64x double_t; +# elif __GLIBC_FLT_EVAL_METHOD == 128 +typedef _Float128 float_t; +typedef _Float128 double_t; +# elif __GLIBC_FLT_EVAL_METHOD == 129 +typedef _Float128x float_t; +typedef _Float128x double_t; +# else +# error "Unknown __GLIBC_FLT_EVAL_METHOD" +# endif +#endif + +/* Get the architecture specific values describing the floating-point + evaluation. The following symbols will get defined: FP_FAST_FMA FP_FAST_FMAF diff --git a/sysdeps/aarch64/bits/mathdef.h b/sysdeps/aarch64/bits/mathdef.h index db992fc..2b55b59 100644 --- a/sysdeps/aarch64/bits/mathdef.h +++ b/sysdeps/aarch64/bits/mathdef.h @@ -23,12 +23,6 @@ #if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF # define _MATH_H_MATHDEF 1 -/* GCC does not promote `float' values to `double'. */ -typedef float float_t; /* `float' expressions are evaluated as - `float'. */ -typedef double double_t; /* `double' expressions are evaluated as - `double'. */ - /* The values returned by `ilogb' for 0 and NaN respectively. */ # define FP_ILOGB0 (-2147483647) # define FP_ILOGBNAN (2147483647) diff --git a/sysdeps/alpha/bits/mathdef.h b/sysdeps/alpha/bits/mathdef.h index ed70ad8..fbca194 100644 --- a/sysdeps/alpha/bits/mathdef.h +++ b/sysdeps/alpha/bits/mathdef.h @@ -25,10 +25,6 @@ #if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF # define _MATH_H_MATHDEF 1 -/* Alpha has "float" and "double" operations. */ -typedef float float_t; /* float expressions are evaluated as float. */ -typedef double double_t; /* double expressions are evaluated as double. */ - /* The values returned by `ilogb' for 0 and NaN respectively. */ # define FP_ILOGB0 (-2147483647) # define FP_ILOGBNAN (2147483647) diff --git a/sysdeps/arm/bits/mathdef.h b/sysdeps/arm/bits/mathdef.h index ae0bcb7..68c96f0 100644 --- a/sysdeps/arm/bits/mathdef.h +++ b/sysdeps/arm/bits/mathdef.h @@ -22,12 +22,6 @@ #if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF # define _MATH_H_MATHDEF 1 -/* GCC does not promote `float' values to `double'. */ -typedef float float_t; /* `float' expressions are evaluated as - `float'. */ -typedef double double_t; /* `double' expressions are evaluated as - `double'. */ - /* The values returned by `ilogb' for 0 and NaN respectively. */ # define FP_ILOGB0 (-2147483647) # define FP_ILOGBNAN (2147483647) diff --git a/sysdeps/hppa/fpu/bits/mathdef.h b/sysdeps/hppa/fpu/bits/mathdef.h index 99c9cff..24b67b2 100644 --- a/sysdeps/hppa/fpu/bits/mathdef.h +++ b/sysdeps/hppa/fpu/bits/mathdef.h @@ -22,12 +22,6 @@ #if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF # define _MATH_H_MATHDEF 1 -/* GCC does not promote `float' values to `double'. */ -typedef float float_t; /* `float' expressions are evaluated as - `float'. */ -typedef double double_t; /* `double' expressions are evaluated as - `double'. */ - /* The values returned by `ilogb' for 0 and NaN respectively. */ # define FP_ILOGB0 (-2147483647) # define FP_ILOGBNAN (2147483647) diff --git a/sysdeps/ia64/bits/mathdef.h b/sysdeps/ia64/bits/mathdef.h index 5a31bd3..44a7642 100644 --- a/sysdeps/ia64/bits/mathdef.h +++ b/sysdeps/ia64/bits/mathdef.h @@ -22,13 +22,6 @@ #if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF # define _MATH_H_MATHDEF 1 -/* The IA-64 architecture computes values with the precision of the - used type. */ -typedef float float_t; /* `float' expressions are evaluated as - `float'. */ -typedef double double_t; /* `double' expressions are evaluated as - `double'. */ - /* The values returned by `ilogb' for 0 and NaN respectively. */ # define FP_ILOGB0 (-2147483647 - 1) # define FP_ILOGBNAN 2147483647 diff --git a/sysdeps/m68k/m680x0/bits/flt-eval-method.h b/sysdeps/m68k/m680x0/bits/flt-eval-method.h new file mode 100644 index 0000000..b2a38ac --- /dev/null +++ b/sysdeps/m68k/m680x0/bits/flt-eval-method.h @@ -0,0 +1,25 @@ +/* Define __GLIBC_FLT_EVAL_METHOD. M68K 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 + . */ + +#ifndef _MATH_H +# error "Never use directly; include instead." +#endif + +/* The m68k FPUs evaluate all values in the 96-bit floating-point + format which is also available for the user as 'long double'. */ +#define __GLIBC_FLT_EVAL_METHOD 2 diff --git a/sysdeps/m68k/m680x0/bits/mathdef.h b/sysdeps/m68k/m680x0/bits/mathdef.h index a550938..702bd0e 100644 --- a/sysdeps/m68k/m680x0/bits/mathdef.h +++ b/sysdeps/m68k/m680x0/bits/mathdef.h @@ -22,14 +22,6 @@ #if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF # define _MATH_H_MATHDEF 1 -/* The m68k FPUs evaluate all values in the 96 bit floating-point format - which is also available for the user as `long double'. Therefore we - define: */ -typedef long double float_t; /* `float' expressions are evaluated as - `long double'. */ -typedef long double double_t; /* `double' expressions are evaluated as - `long double'. */ - /* The values returned by `ilogb' for 0 and NaN respectively. */ # define FP_ILOGB0 (-2147483647 - 1) # define FP_ILOGBNAN (2147483647) diff --git a/sysdeps/mips/bits/mathdef.h b/sysdeps/mips/bits/mathdef.h index 3a11627..74abf97 100644 --- a/sysdeps/mips/bits/mathdef.h +++ b/sysdeps/mips/bits/mathdef.h @@ -24,12 +24,6 @@ #if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF # define _MATH_H_MATHDEF 1 -/* MIPS has `float' and `double' operations. */ -typedef float float_t; /* `float' expressions are evaluated as - `float'. */ -typedef double double_t; /* `double' expressions are evaluated as - `double'. */ - /* The values returned by `ilogb' for 0 and NaN respectively. */ # define FP_ILOGB0 (-2147483647) # define FP_ILOGBNAN 2147483647 diff --git a/sysdeps/powerpc/bits/mathdef.h b/sysdeps/powerpc/bits/mathdef.h index d4dd4b5..debb5a5 100644 --- a/sysdeps/powerpc/bits/mathdef.h +++ b/sysdeps/powerpc/bits/mathdef.h @@ -29,10 +29,6 @@ #if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF # define _MATH_H_MATHDEF 1 -/* PowerPC has both `float' and `double' arithmetic. */ -typedef float float_t; -typedef double double_t; - /* The values returned by `ilogb' for 0 and NaN respectively. */ # define FP_ILOGB0 (-2147483647) # define FP_ILOGBNAN (2147483647) diff --git a/sysdeps/s390/bits/flt-eval-method.h b/sysdeps/s390/bits/flt-eval-method.h new file mode 100644 index 0000000..5793175 --- /dev/null +++ b/sysdeps/s390/bits/flt-eval-method.h @@ -0,0 +1,24 @@ +/* Define __GLIBC_FLT_EVAL_METHOD. S/390 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 + . */ + +#ifndef _MATH_H +# error "Never use directly; include instead." +#endif + +/* This value is used because of a historical mistake. */ +#define __GLIBC_FLT_EVAL_METHOD 1 diff --git a/sysdeps/s390/bits/mathdef.h b/sysdeps/s390/bits/mathdef.h index 8c47ade..5ad04ae 100644 --- a/sysdeps/s390/bits/mathdef.h +++ b/sysdeps/s390/bits/mathdef.h @@ -22,13 +22,6 @@ #if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF # define _MATH_H_MATHDEF 1 -/* Normally, there is no long double type and the `float' and `double' - expressions are evaluated as `double'. */ -typedef double float_t; /* `float' expressions are evaluated as - `double'. */ -typedef double double_t; /* `double' expressions are evaluated as - `double'. */ - /* The values returned by `ilogb' for 0 and NaN respectively. */ # define FP_ILOGB0 (-2147483647) # define FP_ILOGBNAN 2147483647 diff --git a/sysdeps/sh/sh4/bits/mathdef.h b/sysdeps/sh/sh4/bits/mathdef.h index 21ce094..f3ee287 100644 --- a/sysdeps/sh/sh4/bits/mathdef.h +++ b/sysdeps/sh/sh4/bits/mathdef.h @@ -29,10 +29,6 @@ #if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF # define _MATH_H_MATHDEF 1 -/* SH has both `float' and `double' arithmetic. */ -typedef float float_t; -typedef double double_t; - /* The values returned by `ilogb' for 0 and NaN respectively. */ # define FP_ILOGB0 (-0x7fffffff) # define FP_ILOGBNAN 0x7fffffff diff --git a/sysdeps/sparc/bits/mathdef.h b/sysdeps/sparc/bits/mathdef.h index 94a102a..55a3530 100644 --- a/sysdeps/sparc/bits/mathdef.h +++ b/sysdeps/sparc/bits/mathdef.h @@ -27,10 +27,6 @@ #if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF # define _MATH_H_MATHDEF 1 -/* SPARC has both `float' and `double' arithmetic. */ -typedef float float_t; -typedef double double_t; - /* The values returned by `ilogb' for 0 and NaN respectively. */ # define FP_ILOGB0 (-2147483647) # define FP_ILOGBNAN (2147483647) diff --git a/sysdeps/tile/bits/mathdef.h b/sysdeps/tile/bits/mathdef.h index 2db81b4..8ed7ac4 100644 --- a/sysdeps/tile/bits/mathdef.h +++ b/sysdeps/tile/bits/mathdef.h @@ -23,10 +23,6 @@ #if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF # define _MATH_H_MATHDEF 1 -/* "float" and "double" expressions evaluated as "float" and "double". */ -typedef float float_t; -typedef double double_t; - /* The values returned by `ilogb' for 0 and NaN respectively. */ # define FP_ILOGB0 (-2147483647) # define FP_ILOGBNAN (2147483647) diff --git a/sysdeps/x86/bits/flt-eval-method.h b/sysdeps/x86/bits/flt-eval-method.h new file mode 100644 index 0000000..674f2fc --- /dev/null +++ b/sysdeps/x86/bits/flt-eval-method.h @@ -0,0 +1,33 @@ +/* Define __GLIBC_FLT_EVAL_METHOD. x86 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 + . */ + +#ifndef _MATH_H +# error "Never use directly; include instead." +#endif + +#ifdef __FLT_EVAL_METHOD__ +# if __FLT_EVAL_METHOD__ == -1 +# define __GLIBC_FLT_EVAL_METHOD 2 +# else +# define __GLIBC_FLT_EVAL_METHOD __FLT_EVAL_METHOD__ +# endif +#elif defined __x86_64__ +# define __GLIBC_FLT_EVAL_METHOD 0 +#else +# define __GLIBC_FLT_EVAL_METHOD 2 +#endif diff --git a/sysdeps/x86/bits/mathdef.h b/sysdeps/x86/bits/mathdef.h index 9423a7f..2f0025c 100644 --- a/sysdeps/x86/bits/mathdef.h +++ b/sysdeps/x86/bits/mathdef.h @@ -22,23 +22,6 @@ #if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF # define _MATH_H_MATHDEF 1 -# if ((defined __x86_64__ && !defined __FLT_EVAL_METHOD__) \ - || (defined __FLT_EVAL_METHOD__ && __FLT_EVAL_METHOD__ == 0)) -/* The x86-64 architecture computes values with the precission of the - used type. Similarly for -m32 -mfpmath=sse. */ -typedef float float_t; /* `float' expressions are evaluated as `float'. */ -typedef double double_t; /* `double' expressions are evaluated - as `double'. */ -# else -/* The ix87 FPUs evaluate all values in the 80 bit floating-point format - which is also available for the user as `long double'. Therefore we - define: */ -typedef long double float_t; /* `float' expressions are evaluated as - `long double'. */ -typedef long double double_t; /* `double' expressions are evaluated as - `long double'. */ -# endif - /* The values returned by `ilogb' for 0 and NaN respectively. */ # define FP_ILOGB0 (-2147483647 - 1) # define FP_ILOGBNAN (-2147483647 - 1)