Date: Tue, 19 Jul 2016 17:46:09 +0000 (UTC) From: Ed Maste <emaste@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r303033 - head/share/man/man7 Message-ID: <201607191746.u6JHk9ov092270@repo.freebsd.org>
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Author: emaste Date: Tue Jul 19 17:46:09 2016 New Revision: 303033 URL: https://svnweb.freebsd.org/changeset/base/303033 Log: add an arch.7 man page with architecture-specific details Based on details collected on the wiki, at https://wiki.freebsd.org/EdMaste/ArchitectureSpecifics Further details to be added over time. Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D7096 Added: head/share/man/man7/arch.7 (contents, props changed) Modified: head/share/man/man7/Makefile Modified: head/share/man/man7/Makefile ============================================================================== --- head/share/man/man7/Makefile Tue Jul 19 17:31:48 2016 (r303032) +++ head/share/man/man7/Makefile Tue Jul 19 17:46:09 2016 (r303033) @@ -7,6 +7,7 @@ PACKAGE=runtime-manuals #MISSING: eqnchar.7 ms.7 term.7 MAN= adding_user.7 \ + arch.7 \ ascii.7 \ bsd.snmpmod.mk.7 \ build.7 \ Added: head/share/man/man7/arch.7 ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/share/man/man7/arch.7 Tue Jul 19 17:46:09 2016 (r303033) @@ -0,0 +1,171 @@ +.\" Copyright (c) 2016 The FreeBSD Foundation. All rights reserved. +.\" +.\" This documentation was created by Ed Maste under sponsorship of +.\" The FreeBSD Foundation. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" $FreeBSD$ +.\" +.Dd July 19, 2016 +.Dt ARCH 7 +.Os +.Sh NAME +.Nm arch +.Nd Architecture-specific details +.Sh DESCRIPTION +Differences between CPU architectures and platforms supported by +.Fx . +.Pp +.Ss Type sizes +On all supported architectures, +.Bl -column -offset -indent "long long" "Size" +.It Sy Type Ta Sy Size +.It short Ta 2 +.It int Ta 4 +.It long Ta sizeof(void*) +.It long long Ta 8 +.It float Ta 4 +.It double Ta 8 +.El +.Bl -column -offset indent ".Sy Architecture" ".Sy sizeof(void *)" ".Sy "sizeof(long double)" +.It Sy Architecture Ta Sy sizeof(void *) Ta Sy sizeof(long double) +.It amd64 Ta 8 Ta 16 +.It arm Ta 4 Ta 8 +.It armeb Ta 4 Ta 8 +.It armv6 Ta 4 Ta 8 +.It arm64 Ta 8 Ta 16 +.It i386 Ta 4 Ta 12 +.It mips Ta 4 Ta 8 +.It mipsel Ta 4 Ta 8 +.It mipsn32 Ta 4 Ta 8 +.It mips64 Ta 8 Ta 8 +.It mips64el Ta 8 Ta 8 +.It powerpc Ta 4 Ta 8 +.It powerpc64 Ta 8 Ta 8 +.It riscv Ta 8 Ta +.It sparc64 Ta 8 Ta 16 +.El +.Ss Endianness and Char Signedness +.Bl -column -offset indent ".Sy Architecture" ".Sy Endianness" ".Sy "char Signedness" +.It Sy Architecture Ta Sy Endianness Ta Sy char Signedness +.It amd64 Ta little Ta signed +.It arm Ta little Ta unsigned +.It armeb Ta big Ta unsigned +.It armv6 Ta little Ta unsigned +.It arm64 Ta little Ta unsigned +.It i386 Ta little Ta signed +.It mips Ta little Ta signed +.It mipsel Ta big Ta signed +.It mipsn32 Ta little Ta signed +.It mips64 Ta little Ta signed +.It mips64el Ta little Ta signed +.It powerpc Ta big Ta unsigned +.It powerpc64 Ta big Ta unsigned +.It riscv Ta little Ta signed +.It sparc64 Ta big Ta signed +.El +.Ss Page Size +.Bl -column -offset indent ".Sy Architecture" ".Sy Page Sizes" +.It Sy Architecture Ta Sy Page Sizes +.It amd64 Ta 4K, 2M, 1G +.It arm Ta 4K +.It armeb Ta 4K +.It armv6 Ta 4K +.It arm64 Ta 4K, 2M, 1G +.It i386 Ta 4K, 2M (PAE), 4M +.It mips Ta 4K +.It mipsel Ta 4K +.It mipsn32 Ta 4K +.It mips64 Ta 4K +.It mips64el Ta 4K +.It powerpc Ta 4K +.It powerpc64 Ta 4K +.It riscv Ta 4K +.It sparc64 Ta 8K +.El +.Ss Floating Point +.Bl -column -offset indent ".Sy Architecture" ".Sy float, double" ".Sy long double" +.It Sy Architecture Ta Sy float, double Ta Sy long double +.It amd64 Ta hard Ta hard, 80 bit +.It arm Ta soft Ta soft, double precision +.It armeb Ta soft Ta soft, double precision +.It armv6 Ta hard Ta hard, double precision +.It arm64 Ta hard Ta soft, quad precision +.It i386 Ta hard Ta hard, 80 bit +.It mips Ta soft Ta identical to double +.It mipsel Ta soft Ta identical to double +.It mipsn32 Ta soft Ta identical to double +.It mips64 Ta soft Ta identical to double +.It mips64el Ta soft Ta identical to double +.It powerpc Ta hard Ta hard, double precision +.It powerpc64 Ta hard Ta hard, double precision +.It riscv Ta +.It sparc64 Ta hard Ta hard, quad precision +.El +.Ss Predefined Macros +The compiler provides a number of predefined macros. +Some of these provide architecture-specific details and are explained below. +Other macros, including those required by the language standard, are not +included here. +.Pp +The full set of predefined macros can be obtained with this command: +.Bd -literal -offset indent +cc -x c -Dm -E /dev/null +.Ed +.Pp +Common type size and endianness macros: +.Bl -column -offset indent "BYTE_ORDER" ".Sy Meaning" +.It Sy Macro Ta Sy Meaning +.It Dv __LP64__ Ta 64-bit (8-byte) long and pointer, 32-bit (4-byte) int +.It Dv __ILP32__ Ta 32-bit (4-byte) int, long and pointer +.It Dv BYTE_ORDER Ta Either Dv BIG_ENDIAN or Dv LITTLE_ENDIAN . +.Dv PDP11_ENDIAN is not used on FreeBSD. +.El +.Pp +Architecture-specific macros: +.Bl -column -offset indent ".Sy Architecture" ".Sy Predefined macros" +.It Sy Architecture Ta Sy Predefined macros +.It amd64 Ta Dv __amd64__, Dv __x86_64__ +.It arm Ta Dv __arm__ +.It armeb Ta Dv __arm__ +.It armv6 Ta Dv __arm__, Dv __ARM_ARCH >= 6 +.It arm64 Ta Dv __aarch64__ +.It i386 Ta Dv __i386__ +.It mips Ta Dv __mips__, Dv __MIPSEB__, Dv __mips_o32 +.It mipsel Ta Dv __mips__, Dv __mips_o32 +.It mipsn32 Ta Dv __mips__, Dv __MIPSEB__, Dv __mips_n32 +.It mips64 Ta Dv __mips__, Dv __MIPSEB__, Dv __mips_n64 +.It mips64el Ta Dv __mips__, Dv __mips_n64 +.It powerpc Ta Dv __powerpc__ +.It powerpc64 Ta Dv __powerpc__, Dv __powerpc64__ +.It riscv Ta Dv __riscv__, Dv __riscv64 +.It sparc64 Ta Dv __sparc64__ +.El +.Sh SEE ALSO +.Xr src.conf 5 , +.Xr build 7 +.Sh HISTORY +An +.Nm +manual page appeared in +.Fx 12 .
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