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https://github.com/xomboverlord/ldc.git
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126 lines
2.9 KiB
C
126 lines
2.9 KiB
C
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// Copyright (c) 2013 by Digital Mars
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// All Rights Reserved
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// written by Iain Buclaw
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// http://www.digitalmars.com
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// License for redistribution is by either the Artistic License
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// in artistic.txt, or the GNU General Public License in gnu.txt.
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// See the included readme.txt for details.
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#include <assert.h>
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#include "target.h"
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#include "mars.h"
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#include "mtype.h"
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#if IN_LLVM
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unsigned GetTypeAlignment(Type* t);
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unsigned GetPointerSize();
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unsigned GetTypeStoreSize(Type* t);
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unsigned GetTypeAllocSize(Type* t);
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#endif
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int Target::ptrsize;
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int Target::realsize;
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int Target::realpad;
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int Target::realalignsize;
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void Target::init()
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{
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#if IN_LLVM
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ptrsize = GetPointerSize();
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realsize = GetTypeAllocSize(Type::basic[Tfloat80]);
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realpad = realsize - GetTypeStoreSize(Type::basic[Tfloat80]);
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realalignsize = GetTypeAlignment(Type::basic[Tfloat80]);
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#else
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// These have default values for 32 bit code, they get
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// adjusted for 64 bit code.
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ptrsize = 4;
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if (global.params.isLinux || global.params.isFreeBSD
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|| global.params.isOpenBSD || global.params.isSolaris)
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{
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realsize = 12;
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realpad = 2;
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realalignsize = 4;
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}
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else if (global.params.isOSX)
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{
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realsize = 16;
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realpad = 6;
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realalignsize = 16;
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}
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else if (global.params.isWindows)
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{
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realsize = 10;
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realpad = 0;
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realalignsize = 2;
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}
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else
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assert(0);
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if (global.params.is64bit)
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{
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ptrsize = 8;
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if (global.params.isLinux || global.params.isFreeBSD || global.params.isSolaris)
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{
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realsize = 16;
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realpad = 6;
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realalignsize = 16;
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}
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}
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#endif
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}
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/******************************
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* Return memory alignment size of type.
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*/
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unsigned Target::alignsize (Type* type)
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{
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assert (type->isTypeBasic());
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#if IN_LLVM
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if (type->ty == Tvoid) return 1;
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return GetTypeAlignment(type);
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#else
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switch (type->ty)
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{
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case Tfloat80:
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case Timaginary80:
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case Tcomplex80:
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return Target::realalignsize;
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case Tcomplex32:
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if (global.params.isLinux || global.params.isOSX || global.params.isFreeBSD
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|| global.params.isOpenBSD || global.params.isSolaris)
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return 4;
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break;
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case Tint64:
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case Tuns64:
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case Tfloat64:
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case Timaginary64:
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case Tcomplex64:
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if (global.params.isLinux || global.params.isOSX || global.params.isFreeBSD
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|| global.params.isOpenBSD || global.params.isSolaris)
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return global.params.is64bit ? 8 : 4;
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break;
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default:
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break;
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}
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return type->size(Loc());
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#endif
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}
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/******************************
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* Return field alignment size of type.
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*/
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unsigned Target::fieldalign (Type* type)
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{
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// LDC_FIXME: Verify this.
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return type->alignsize();
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}
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