{"id":1171,"date":"2008-08-10T06:50:19","date_gmt":"2008-08-09T21:50:19","guid":{"rendered":"http:\/\/na-inet.jp\/new-na-inet\/weblog\/2008\/08\/810_2\/"},"modified":"2008-08-10T06:50:19","modified_gmt":"2008-08-09T21:50:19","slug":"810_2","status":"publish","type":"post","link":"https:\/\/na-inet.jp\/weblog2\/2008\/08\/10\/810_2\/","title":{"rendered":"8\/10(\u65e5) \u639b\u5ddd\u30fb\u66c7"},"content":{"rendered":"<p>\u3000\u30aa\u30fc\u30d7\u30f3\u30ad\u30e3\u30f3\u30d1\u30b9\u4e8c\u65e5\u76ee\u3002\u30ef\u30b7\u3093\u3068\u3053\u306f4\u5e74\u751f\u304c\u9811\u5f35\u3063\u3066\u8aac\u660e\u3057\u3066\u304f\u308c\u3066\u3044\u308b\u306e\u3067\u975e\u5e38\u306b\u52a9\u304b\u308a\u307e\u3059\u3002\u4eca\u65e5\u3082\u3088\u308d\u3057\u3085\u30fc\u306b\u3002\u57cb\u3081\u5408\u308f\u305b\u306f\u3069\u3063\u304b\u3067\u3059\u308b\u306e\u3067\uff5e\u3002<br 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href=\"http:\/\/www.comiket.co.jp\/\">\u30b3\u30df\u30b1<\/a>\u4e09\u65e5\u76ee\u306b\u904a\u3073\u306b\u884c\u3053\u3046\u3068\u8a08\u753b\u3057\u3066\u3044\u308b\uff08\u3082\u3061\u308d\u3093\u5348\u5f8c\u304b\u3089\u307e\u3063\u305f\u308a\u3068\u53c2\u52a0\u4e88\u5b9a\uff09\u3002\u3053\u306e\u30af\u30bd\u6691\u3044\u4e2d\uff0c\u66f4\u306b\u6b32\u671b\u3067\u6e26\u5dfb\u304f\u3042\u306e\u5de8\u5927\u306a\u30d3\u30c3\u30b0\u30b5\u30a4\u30c8\u5185\u3092\u3046\u308d\u3064\u304f\u306e\u306f\u81ea\u6bba\u884c\u70ba\u306b\u7b49\u3057\u3044\u306e\u3060\u304c\uff0c\u9b31\u3092\u6255\u3046\u306b\u306f\u305d\u306e\u3050\u3089\u3044\u306e\u8352\u7642\u6cbb\u304c\u5fc5\u8981\u3068\u5224\u65ad\u3057\u305f\u305f\u3081\uff08\u3046\u305d\u3064\u3051\uff09\u3002<br \/>\n\u3000\u305d\u3057\u305f\u3089<a href=\"http:\/\/www.comiket.co.jp\/info-a\/C74\/C74Oshirase.html\">\u3053\u3093\u306a\u7dca\u6025\u544a\u77e5<\/a>\u304c\u51fa\u3066\u3044\u305f\u306e\u3092\u77e5\u308b\u3002\u3075\u30fc\u3093\uff0c\u3042\u3063\u3061\u3053\u3063\u3061\u3067\u59a8\u5bb3\u30c7\u30f3\u30d1\u91ce\u90ce\u304c\u51fa\u6ca1\u3057\u3066\u3044\u308b\u304b\u3089\uff0c\u8b66\u5bdf\u3068\u3057\u3066\u3082\u6301\u3061\u7269\u691c\u67fb\u3050\u3089\u3044\u304d\u3061\u3093\u3068\u3084\u308c\uff0c\u3068\u8a00\u308f\u3056\u308b\u3092\u5f97\u306a\u3044\u3063\u3066\u3053\u3068\u304b\u3002\u307e\u30fc\u3057\u3083\u30fc\u306a\u3044\u304b\u306a\u3002\u30ef\u30f3\u30d5\u30a7\u30b9\u3067\u30a8\u30b9\u30ab\u30ec\u30fc\u30bf\u30fc\u306e\u4e8b\u6545\u304c\u3042\u3063\u305f\u3070\u304b\u308a\u3060\u3057\uff0c\u52d5\u7dda\u306e\u79fb\u52d5\u306f\u3084\u3080\u3092\u5f97\u307e\u3044\u3002\u4e8b\u6545\u539f\u56e0\u304c\u30cf\u30c3\u30ad\u30ea\u3057\u306a\u3044\u4ee5\u4e0a\uff0c\u4e57\u3089\u306a\u3044\u30fb\u52d5\u304b\u3055\u306a\u3044\u3063\u3066\u306e\u304c\u5409\u3063\u3066\u3053\u3063\u3066\u3059\u306a\u3002<br \/>\n\u3000\u521d\u7b49\u95a2\u6570(IEEE754\u306e\u7bc4\u56f2\u5185)\u306f\u3069\u3046\u3084\u3063\u3066\u8a08\u7b97\u3057\u3066\u3044\u308b\u306e\u304b\uff0c\u3068\u3044\u3046\u304a\u554f\u3044\u5408\u308f\u305b\u304c\u3042\u3063\u305f\u306e\u3067\uff0cx86\u7cfbCPU\u306b\u9650\u3063\u3066\u3060\u304c\uff0c\u3061\u3087\u3063\u3068\u8abf\u3079\u3066\u307f\u305f\u3002\u3053\u3046\u8a00\u3046\u6642\u306b\u5927\u5909\u91cd\u5b9d\u3059\u308b\u306e\u304c\uff0c<a href=\"http:\/\/na-inet.jp\/weblog\/archives\/000985.html\">Muller\u306e\u672c<\/a>\u3068IF\u30b9\u30da\u30b7\u30e3\u30eb\u300c\u6570\u5024\u6f14\u7b97\u30d7\u30ed\u30bb\u30c3\u30b5\u300d(20\u5e74\u4ee5\u4e0a\u524d\u306e\u30e0\u30c3\u30af\uff0c\u66f8\u8a8c\u60c5\u5831\u306f<a href=\"http:\/\/na-inet.jp\/na\/tkouya.bib\">\u3053\u3063\u3061<\/a>\u3092\u898b\u3066\u306d)\uff0c\u305d\u3057\u3066Intel\u306e\u5de8\u5927\u306a\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u3002\u6700\u65b0\u306eIA-32\u306e\u89e3\u8aac\u306f<a href=\"http:\/\/download.intel.com\/design\/processor\/manuals\/253665.pdf\">\u3053\u3063\u3061<\/a>\uff0c\u6b74\u53f2\u7684\u306a\u8a71\u306f<a href=\"http:\/\/www.intel.com\/design\/pentium\/manuals\/24143004.pdf\">\u3053\u3061\u3089<\/a>\u306eAppendix G\u304c\u4f7f\u3048\u308b\u3002<br \/>\n\u3000\u7d50\u8ad6\u304b\u3089\u8a00\u3048\u3070\uff0ci80386(7)\u4ee5\u6765\uff0cIA-32 CPU\u3067\u306f\u56db\u5247\u6f14\u7b97\u306e\u4ed6\uff0c<\/p>\n<blockquote><p>\u5e73\u65b9\u6839: FSQRT(sqrt(x))<br \/>\n\u4e09\u89d2\u95a2\u6570: FSIN(sin(x)), FCOS(cos(x)), FSINCOS(sin(x)&#038;cos(x)), FPTAN (tan(x)), FPATAN(arctan(x))<br \/>\n\u6307\u6570\u30fb\u5bfe\u6570\u95a2\u6570: F2XM1(2^x &#8211; 1), FYL2X(y * log_2(x)), FYL2XP1(y * log_2(x + 1))\n<\/p><\/blockquote>\n<p>\u304c\u57fa\u672c\u547d\u4ee4\u3068\u3057\u3066\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u304a\u308a\uff0c\u3088\u308a\u8907\u96d1\u306a\u95a2\u6570\u3092\u8a08\u7b97\u3059\u308b\u305f\u3081\u306b\u306f\u3053\u308c\u3089\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f5c\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<br \/>\n\u3000\u3067\uff0c\u3053\u308c\u3089\u306e\u57fa\u672c\u547d\u4ee4\u3067\u306fIntel CPU\u306e\u5834\u5408\uff0c8087 &#8211; 80487\u307e\u3067\u306fCORDIC(+\u6709\u7406\u8fd1\u4f3c)\uff0cPentium\u4ee5\u964d\u306f\uff08\u6709\u7406\uff09\u591a\u9805\u5f0f\u8fd1\u4f3c + \u533a\u9593\u6570\u8868\u6cd5(Table-based method)\u3092\u4f7f\u3063\u3066CPU\u5185\u90e8\u306eMicrocode\u3067\u8a08\u7b97\u3092\u884c\u3063\u3066\u3044\u308b\u3089\u3057\u3044\u3002CORDIC\u3060\u3068Microcode(8087\u3067\u306f500\u884c\u4ee5\u5185\u3068\u304b)\u304c\u5c0f\u3055\u304f\u3066\u6e08\u3080\u306e\u3067\uff0c\u53e4\u3044CPU\u3067\u306f\u666e\u901a\u306b\u4f7f\u308f\u308c\u3066\u3044\u305f\u6a21\u69d8\u3002\u6700\u8fd1\u306e\u3082\u306e\u306f\u533a\u9593\u7e2e\u5c0f\u306e\u624b\u9593\u3092\u7701\u304f\u305f\u3081\u306b\uff0c\u533a\u9593\u6bce\u306b\u8fd1\u4f3c\u5f0f\u3092\u5909\u3048\u3066\u8a08\u7b97\u3059\u308b\u65b9\u5f0f\u304c\u4e3b\u6d41\u3068\u306e\u3053\u3068\u3067\u3042\u308b\u3002CORDIC\u306b\u3064\u3044\u3066\u306fMuller\u306e\u672c\u304c\u4e00\u756a\u8a73\u3057\u3044(Maple\u30b3\u30fc\u30c9\u3064\u304d)\u306e\u3067\u305d\u3063\u3061\u3092\u53c2\u8003\u306b\u3057\u3066\u304f\u308c\u305f\u307e\u3078\u3002<br \/>\n\u3000\u305d\u3093\u3067\u306f\u4eca\u65e5\u3082\u51fa\u6483\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3000\u30aa\u30fc\u30d7\u30f3\u30ad\u30e3\u30f3\u30d1\u30b9\u4e8c\u65e5\u76ee\u3002\u30ef\u30b7\u3093\u3068\u3053\u306f4\u5e74\u751f\u304c\u9811\u5f35\u3063\u3066\u8aac\u660e\u3057\u3066\u304f\u308c\u3066\u3044\u308b\u306e\u3067\u975e\u5e38\u306b\u52a9\u304b\u308a\u307e\u3059\u3002\u4eca\u65e5\u3082\u3088\u308d\u3057\u3085\u30fc\u306b\u3002\u57cb\u3081\u5408\u308f\u305b\u306f\u3069\u3063\u304b\u3067\u3059\u308b\u306e\u3067\uff5e\u3002 \u3000\u6628\u65e5\u306f\u6628\u5e74\u4ee5\u4e0a\u306b\u6765\u5834\u8005\u304c\u591a\u304b\u3063\u305f\u3051\u3069\uff0c\u4eca\u65e5\u306f\u3069\u3046\u304b\u306a\u3041\u3002\u30de\u30a4\u30ca\u30fc\u79c1\u5927 &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/na-inet.jp\/weblog2\/2008\/08\/10\/810_2\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;8\/10(\u65e5) \u639b\u5ddd\u30fb\u66c7&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[2],"tags":[],"class_list":["post-1171","post","type-post","status-publish","format-standard","hentry","category-2"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/na-inet.jp\/weblog2\/wp-json\/wp\/v2\/posts\/1171","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/na-inet.jp\/weblog2\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/na-inet.jp\/weblog2\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/na-inet.jp\/weblog2\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/na-inet.jp\/weblog2\/wp-json\/wp\/v2\/comments?post=1171"}],"version-history":[{"count":0,"href":"https:\/\/na-inet.jp\/weblog2\/wp-json\/wp\/v2\/posts\/1171\/revisions"}],"wp:attachment":[{"href":"https:\/\/na-inet.jp\/weblog2\/wp-json\/wp\/v2\/media?parent=1171"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/na-inet.jp\/weblog2\/wp-json\/wp\/v2\/categories?post=1171"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/na-inet.jp\/weblog2\/wp-json\/wp\/v2\/tags?post=1171"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}