{"id":381,"date":"2010-08-03T01:55:14","date_gmt":"2010-08-02T16:55:14","guid":{"rendered":"http:\/\/blog.himor.in\/?p=381"},"modified":"2011-12-15T02:09:31","modified_gmt":"2011-12-14T17:09:31","slug":"gcc%e3%81%a7%e3%81%aei386%e3%81%a8amd64%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e3%83%af%e3%83%bc%e3%83%89%e3%82%a2%e3%83%a9%e3%82%a4%e3%83%a1%e3%83%b3%e3%83%88%e3%81%ae%e5%8b%95%e4%bd%9c%e3%81%ae","status":"publish","type":"post","link":"https:\/\/blog.himor.in\/?p=381","title":{"rendered":"gcc\u3067\u306ei386\u3068amd64\u306b\u304a\u3051\u308b\u30ef\u30fc\u30c9\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u306e\u52d5\u4f5c\u306e\u9055\u3044"},"content":{"rendered":"

Linux (Debian lenny)\u3067\u3001\u30e1\u30e2\u30ea\u30c0\u30f3\u30d7\u3068\u304bsocket\u7d4c\u7531\u306e\u901a\u4fe1\u3068\u304b\u3092\u884c\u3046\u30e9\u30c3\u30d1\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u8a66\u9a13\u3057\u3066\u3044\u3066\u3001\u30c7\u30fc\u30bf\u3092\u7a81\u3063\u8fbc\u3080\u69cb\u9020\u4f53\u306e\u4e2d\u306e\u30ef\u30fc\u30c9\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u304c(amd64\u3067)\u601d\u3063\u305f\u306e\u3068\u9055\u3063\u3066\u3044\u308b\u3053\u3068\u306b\u6c17\u3065\u3044\u3066\u3001\u5c11\u3057\u8a66\u9a13\u3057\u3066\u307f\u305f\u3002\u6614\u306ei386\u306e\u6642\u4ee3\u306f\u30014byte\u3054\u3068\u306b\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u5883\u754c\u304c\u6765\u308b\u304b\u3089\u305d\u308c\u306b\u3042\u308f\u305b\u3066\u3001\u3068\u3044\u3046\u8a71\u304c\u3042\u3063\u305f\u3051\u308c\u3069\u3001\u305d\u3046\u3067\u306f\u306a\u3044\u69d8\u5b50\u3002<\/p>\n

\u74b0\u5883\u306fDebian lenny\u306e\u30d1\u30c3\u30b1\u30fc\u30b8\u305d\u306e\u307e\u307e\u3067\u3001\u6b21\u306e\u3088\u3046\u306a\u611f\u3058\u3002<\/p>\n

@i386 (32bit)\r\n% gcc -v\r\nUsing built-in specs.\r\nTarget: i486-linux-gnu\r\nConfigured with: ..\/src\/configure -v --with-pkgversion='Debian 4.3.2-1.1' --with-bugurl=file:\/\/\/usr\/share\/doc\/gcc-4.3\/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=\/usr --enable-shared --with-system-zlib --libexecdir=\/usr\/lib --without-included-gettext --enable-threads=posix --enable-nls --with-gxx-include-dir=\/usr\/include\/c++\/4.3 --program-suffix=-4.3 --enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc --enable-mpfr --enable-targets=all --enable-cld --enable-checking=release --build=i486-linux-gnu --host=i486-linux-gnu --target=i486-linux-gnu\r\nThread model: posix\r\ngcc version 4.3.2 (Debian 4.3.2-1.1) \r\n% uname -a\r\nLinux lenny-i386 2.6.26-1-686 #1 SMP Fri Mar 13 18:08:45 UTC 2009 i686 GNU\/Linux\r\n\r\n@amd64 (64bit)\r\n% gcc -v\r\nUsing built-in specs.\r\nTarget: x86_64-linux-gnu\r\nConfigured with: ..\/src\/configure -v --with-pkgversion='Debian 4.3.2-1.1' --with-bugurl=file:\/\/\/usr\/share\/doc\/gcc-4.3\/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=\/usr --enable-shared --with-system-zlib --libexecdir=\/usr\/lib --without-included-gettext --enable-threads=posix --enable-nls --with-gxx-include-dir=\/usr\/include\/c++\/4.3 --program-suffix=-4.3 --enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc --enable-mpfr --enable-cld --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu\r\nThread model: posix\r\ngcc version 4.3.2 (Debian 4.3.2-1.1) \r\n% uname -a\r\nLinux lenny-amd64 2.6.26-2-amd64 #1 SMP Tue Mar 9 22:29:32 UTC 2010 x86_64 GNU\/Linux\r\n<\/pre>\n
\u3053\u306e\u74b0\u5883\u3067\u8a66\u9a13\u3067\u304d\u308b\u306e\u306f\u300164bit\u30d0\u30a4\u30ca\u30ea@amd64\u300132bit\u30d0\u30a4\u30ca\u30ea@amd64\u300132bit\u30d0\u30a4\u30ca\u30ea@i386\u306e3\u3064\u3002\u3072\u3068\u307e\u305a\u3001\u3055\u307e\u3056\u307e\u306a\u578b\u3067\u306e\u30e1\u30e2\u30ea\u4e0a\u306e\u30b5\u30a4\u30ba\u3092\u898b\u308b\u3002\u6574\u6570\u578b\u3067\u306f”long”\u3060\u3051\u306f64bit\u306e\u5b9f\u88c5\u7cfb\u306b\u3088\u3063\u3066\u5185\u90e8\u8868\u73fe\u304c\u9055\u3046\u3068\u304b\u304c\u3042\u308b\u306e\u3067gcc\u3067\u306f\u3069\u3046\u304b\u3001\u3068\u3002<\/p>\n\n\n\n\n\n\n\n\n\n\n
type<\/th>\n64bit@amd64<\/th>\n32bit@amd64<\/th>\n32bit@i386<\/th>\n<\/tr>\n
char<\/td>\n1<\/td>\n1<\/td>\n1<\/td>\n<\/tr>\n
short<\/td>\n2<\/td>\n2<\/td>\n2<\/td>\n<\/tr>\n
int<\/td>\n4<\/td>\n4<\/td>\n4<\/td>\n<\/tr>\n
long<\/td>\n8<\/td>\n4<\/td>\n4<\/td>\n<\/tr>\n
long long<\/td>\n8<\/td>\n8<\/td>\n8<\/td>\n<\/tr>\n
float<\/td>\n4<\/td>\n4<\/td>\n4<\/td>\n<\/tr>\n
double<\/td>\n8<\/td>\n8<\/td>\n8<\/td>\n<\/tr>\n
long double<\/td>\n16<\/td>\n16<\/td>\n12<\/td>\n<\/tr>\n<\/table>\n
\u3068\u3044\u3046\u3053\u3068\u3067\u3001”long”\u3068”long double”\u306e\u307f32\/64bit\u3067\u30b5\u30a4\u30ba\u304c\u7570\u306a\u308b\u3002\u5f53\u7136\u306a\u304c\u308932bit\u30d0\u30a4\u30ca\u30ea\u3092\u305d\u308c\u305e\u308ci386\u3068amd64\u306ekernel\u3067\u52d5\u304fLinux\u306b\u6301\u3063\u3066\u3044\u3063\u3066\u3082\u5909\u5316\u306f\u306a\u3044\u3002<\/p>\n
\u6b21\u306b\u3001\u30ef\u30fc\u30c9\u5883\u754c\u304c\u3069\u3046\u306a\u308b\u304b\u3092\u8abf\u3079\u308b\u3002\u5229\u7528\u3059\u308b\u69cb\u9020\u4f53\u306f\u3001\u30b5\u30a4\u30ba\u306e\u5224\u5b9a\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u9069\u5b9cchar\u3092\u7a81\u3063\u8fbc\u3093\u3060\u4e26\u3073\u3002\u305d\u308c\u305e\u308c\u306f\u3055\u307e\u308c\u3066\u3044\u308bchar\u306f\u30b5\u30a4\u30ba1byte\u3060\u304c\u30ef\u30fc\u30c9\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u306e\u5f71\u97ff\u3092\u53d7\u3051\u3066\u3001\u69cb\u9020\u4f53\u306e\u4e2d\u306e(\u30d1\u30c3\u30c7\u30a3\u30f3\u30b0\u3092\u542b\u3080)\u5b9f(?)\u30e1\u30e2\u30ea\u30b5\u30a4\u30ba\u306f\u9577\u304f\u306a\u308b\u306f\u305a\u3002<\/p>\n
    \n
  • char a<\/li>\n
  • short b<\/li>\n
  • int c<\/li>\n
  • char d<\/li>\n
  • long e<\/li>\n
  • char f<\/li>\n
  • long long g<\/li>\n
  • char h<\/li>\n
  • float i<\/li>\n
  • char j<\/li>\n
  • double k<\/li>\n
  • char l<\/li>\n
  • long double m<\/li>\n<\/ul>\n
    \u3068\u3044\u3046\u3068\u3053\u308d\u3067\u300132bit\u30d0\u30a4\u30ca\u30ea\u306864bit\u30d0\u30a4\u30ca\u30ea\u3067\u306e\u7d50\u679c\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u3063\u305f\u3002<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    name<\/th>\ntype<\/th>\n32bit<\/th>\n64bit<\/th>\n<\/tr>\n
    all<\/td>\n<\/td>\n64<\/td>\n96<\/td>\n<\/tr>\n
    b-a<\/td>\nchar<\/td>\n2<\/td>\n2<\/td>\n<\/tr>\n
    c-b<\/td>\nshort<\/td>\n2<\/td>\n2<\/td>\n<\/tr>\n
    d-c<\/td>\nint<\/td>\n4<\/td>\n4<\/td>\n<\/tr>\n
    e-d<\/td>\nchar<\/td>\n4<\/td>\n8<\/td>\n<\/tr>\n
    f-e<\/td>\nlong<\/td>\n4<\/td>\n8<\/td>\n<\/tr>\n
    g-f<\/td>\nchar<\/td>\n4<\/td>\n8<\/td>\n<\/tr>\n
    h-g<\/td>\nlong long<\/td>\n8<\/td>\n8<\/td>\n<\/tr>\n
    i-h<\/td>\nchar<\/td>\n4<\/td>\n4<\/td>\n<\/tr>\n
    j-i<\/td>\nfloat<\/td>\n4<\/td>\n4<\/td>\n<\/tr>\n
    k-j<\/td>\nchar<\/td>\n4<\/td>\n8<\/td>\n<\/tr>\n
    l-k<\/td>\ndouble<\/td>\n8<\/td>\n8<\/td>\n<\/tr>\n
    m-l<\/td>\nchar<\/td>\n4<\/td>\n16<\/td>\n<\/tr>\n<\/table>\n
    \u3053\u308c\u3092\u898b\u308b\u3068\u300132bit\u3067\u306f4byte\u3054\u3068\u306b\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3055\u308c\u3066\u3044\u308b\u306e\u306f\u5909\u308f\u3063\u3066\u3044\u306a\u3044\u69d8\u5b50\u3002\u3057\u304b\u3057\u306a\u304c\u3089\u300164bit\u3067\u306f\u305d\u306e\u76f4\u5f8c\u306b\u6765\u308b\u30c7\u30fc\u30bf\u306e\u5b9f\u30b5\u30a4\u30ba\u3092\u57fa\u6e96\u306b\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3055\u308c\u3066\u3044\u308b\u3088\u3046\u306b\u307f\u3048\u308b\u3002\u305f\u3068\u3048\u3070\u300116bit\u306elong double\u306e\u958b\u59cb\u70b9\u306f16bit\u306e\u6574\u6570\u500d\u306e\u30e1\u30e2\u30ea\u304b\u3089\u30018bit\u306elong\u306e\u958b\u59cb\u70b9\u306f8bit\u306e\u6574\u6570\u500d\u306e\u30e1\u30e2\u30ea\u304b\u3089\u3001\u3068\u3044\u3046\u611f\u3058\u3002(\u3082\u3057\u5168\u3066\u304c8\/16byte\u306e\u56fa\u5b9a\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u4f3c\u5408\u3046\u3088\u3046\u306b\u30d1\u30c7\u30a3\u30f3\u30b0\u3055\u308c\u3066\u3044\u308b\u306a\u3089\u3001float\/j-i\u306e\u90e8\u5206\u306e\u6570\u5024\u304c\u304a\u304b\u3057\u3044)<\/p>\n
    \u3053\u308c\u3060\u3051\u306a\u308964bit\u5074\u306b\u3042\u308f\u305b\u305f\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u306b\u306a\u308b\u3088\u3046\u306bstruct\u306e\u5b9a\u7fa9\u90e8\u5206\u3067\u3044\u3058\u3063\u3066\u3084\u308c\u3070\u3044\u3044\u3088\u3046\u306a\u6c17\u306f\u3059\u308b\u304c\u3001\u30bf\u30fc\u30b2\u30c3\u30c8\u306fLinux\u3060\u3051\u3067\u306f\u306a\u3044\u306e\u3067\u3055\u307e\u3056\u307e\u306a\u51e6\u7406\u7cfb\u3067\u306e\u9055\u3044\u3092\u5438\u53ce\u3059\u308b\u3088\u3046\u306a\u5b9a\u7fa9\u306f\u9762\u5012\u306b\u601d\u3048\u308b\u3002\u3068\u3044\u3046\u3053\u3068\u3067\u3001\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u4e2d\u3067\u3053\u306e\u90e8\u5206\u3092\u5438\u53ce\u3059\u308b\u30b3\u30fc\u30c9\u3092\u5165\u308c\u308b(\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u3048\u308b\u3068\u3001\u81ea\u52d5\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u306e\u5f8c\u306b\u9055\u3063\u3066\u3044\u308c\u3070\u5438\u53ce\u3059\u308b\u30b3\u30fc\u30c9\u306b\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u3059\u308b\u3001\u3042\u305f\u308a)\u3053\u3068\u306b\u3059\u308b\u3002<\/p>\n
    \u8a66\u9a13\u306b\u5229\u7528\u3057\u305f\u30b3\u30fc\u30c9\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u611f\u3058\u3002<\/p>\n
    #include \r\n#include \r\n\r\ntypedef struct {\r\n  char a;\r\n  short b;\r\n  int c;\r\n  char d;\r\n  long e;\r\n  char f;\r\n  long long g;\r\n  char h;\r\n  float i;\r\n  char j;\r\n  double k;\r\n  char l;\r\n  long double m;\r\n} var;\r\n\r\nint main() {\r\n  var *obj = new var;\r\n\r\n  \/\/ sizeof types\r\n  std::cout\r\n    << \"sizeof(char)        : \" << sizeof(char)         << std::endl\r\n    << \"sizeof(short)       : \" << sizeof(short)        << std::endl\r\n    << \"sizeof(int)         : \" << sizeof(int)          << std::endl\r\n    << \"sizeof(long)        : \" << sizeof(long)         << std::endl\r\n    << \"sizeof(long long)   : \" << sizeof(long long)    << std::endl\r\n    << \"sizeof(float)       : \" << sizeof(float)        << std::endl\r\n    << \"sizeof(double)      : \" << sizeof(double)       << std::endl\r\n    << \"sizeof(long double) : \" << sizeof(long double)  << std::endl\r\n    << std::endl;\r\n\r\n  \/\/ struct memory padding\r\n  std::cout\r\n    << \"all  : \" << sizeof(var) << std::endl\r\n    << \"b-a (char)       : \"\r\n      << (size_t)((char *)(&(obj->b)) - (char *)(&(obj->a))) << std::endl\r\n    << \"c-b (short)      : \"\r\n      << (size_t)((char *)(&(obj->c)) - (char *)(&(obj->b))) << std::endl\r\n    << \"d-c (int)        : \"\r\n      << (size_t)((char *)(&(obj->d)) - (char *)(&(obj->c))) << std::endl\r\n    << \"e-d (char)       : \"\r\n      << (size_t)((char *)(&(obj->e)) - (char *)(&(obj->d))) << std::endl\r\n    << \"f-e (long)       : \"\r\n      << (size_t)((char *)(&(obj->f)) - (char *)(&(obj->e))) << std::endl\r\n    << \"g-f (char)       : \"\r\n      << (size_t)((char *)(&(obj->g)) - (char *)(&(obj->f))) << std::endl\r\n    << \"h-g (long long)  : \"\r\n      << (size_t)((char *)(&(obj->h)) - (char *)(&(obj->g))) << std::endl\r\n    << \"i-h (char)       : \"\r\n      << (size_t)((char *)(&(obj->i)) - (char *)(&(obj->h))) << std::endl\r\n    << \"j-i (float)      : \"\r\n      << (size_t)((char *)(&(obj->j)) - (char *)(&(obj->i))) << std::endl\r\n    << \"k-j (char)       : \"\r\n      << (size_t)((char *)(&(obj->k)) - (char *)(&(obj->j))) << std::endl\r\n    << \"l-k (double)     : \"\r\n      << (size_t)((char *)(&(obj->l)) - (char *)(&(obj->k))) << std::endl\r\n    << \"m-l (char)       : \"\r\n      << (size_t)((char *)(&(obj->m)) - (char *)(&(obj->l))) << std::endl\r\n    << std::endl;\r\n  delete obj;\r\n}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
    Linux (Debian lenny)\u3067\u3001\u30e1\u30e2\u30ea\u30c0\u30f3\u30d7\u3068\u304bsocket\u7d4c\u7531\u306e\u901a\u4fe1\u3068\u304b\u3092\u884c\u3046\u30e9\u30c3\u30d1\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u8a66\u9a13\u3057\u3066\u3044\u3066\u3001\u30c7\u30fc\u30bf\u3092\u7a81\u3063\u8fbc\u3080\u69cb\u9020\u4f53\u306e\u4e2d\u306e\u30ef\u30fc\u30c9\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u304c(amd64\u3067)\u601d\u3063\u305f\u306e\u3068\u9055\u3063\u3066\u3044\u308b\u3053\u3068\u306b\u6c17\u3065\u3044\u3066\u3001\u5c11\u3057\u8a66\u9a13\u3057\u3066\u307f\u305f\u3002\u6614\u306ei386\u306e\u6642\u4ee3\u306f\u30014byte\u3054\u3068\u306b\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u5883\u754c\u304c\u6765\u308b\u304b\u3089\u305d\u308c\u306b\u3042\u308f\u305b\u3066\u3001\u3068\u3044\u3046\u8a71\u304c\u3042\u3063\u305f\u3051\u308c\u3069\u3001\u305d\u3046\u3067\u306f\u306a\u3044\u69d8\u5b50\u3002 \u74b0\u5883\u306fDebian lenny\u306e\u30d1\u30c3\u30b1\u30fc\u30b8\u305d\u306e\u307e\u307e\u3067\u3001\u6b21\u306e\u3088\u3046\u306a\u611f\u3058\u3002 @i386 (32bit) % gcc -v Using built-in specs. Target: i486-linux-gnu Configured with: ..\/src\/configure -v –with-pkgversion=’Debian 4.3.2-1.1′ –with-bugurl=file:\/\/\/usr\/share\/doc\/gcc-4.3\/README.Bugs –enable-languages=c,c++,fortran,objc,obj-c++ –prefix=\/usr –enable-shared –with-system-zlib –libexecdir=\/usr\/lib –without-included-gettext –enable-threads=posix –enable-nls –with-gxx-include-dir=\/usr\/include\/c++\/4.3 –program-suffix=-4.3 –enable-clocale=gnu –enable-libstdcxx-debug –enable-objc-gc –enable-mpfr –enable-targets=all –enable-cld –enable-checking=release –build=i486-linux-gnu –host=i486-linux-gnu –target=i486-linux-gnu Thread model: posix gcc version 4.3.2 (Debian 4.3.2-1.1) % uname -a Linux lenny-i386 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[4,16,14],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.himor.in\/index.php?rest_route=\/wp\/v2\/posts\/381"}],"collection":[{"href":"https:\/\/blog.himor.in\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.himor.in\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.himor.in\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.himor.in\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=381"}],"version-history":[{"count":7,"href":"https:\/\/blog.himor.in\/index.php?rest_route=\/wp\/v2\/posts\/381\/revisions"}],"predecessor-version":[{"id":441,"href":"https:\/\/blog.himor.in\/index.php?rest_route=\/wp\/v2\/posts\/381\/revisions\/441"}],"wp:attachment":[{"href":"https:\/\/blog.himor.in\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=381"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.himor.in\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=381"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.himor.in\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=381"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}