{"id":4266,"date":"2013-09-22T03:35:23","date_gmt":"2013-09-21T18:35:23","guid":{"rendered":"http:\/\/umezawa.dyndns.info\/wordpress\/?p=4266"},"modified":"2013-09-23T16:50:56","modified_gmt":"2013-09-23T07:50:56","slug":"vgather%e7%b3%bb%e5%91%bd%e4%bb%a4%e3%81%ae%e9%80%9f%e3%81%95%e3%81%82%e3%82%8b%e3%81%84%e3%81%af%e9%81%85%e3%81%95","status":"publish","type":"post","link":"http:\/\/umezawa.dyndns.info\/wordpress\/?p=4266","title":{"rendered":"VGATHER\u7cfb\u547d\u4ee4\u306e\u901f\u3055\u3042\u308b\u3044\u306f\u9045\u3055"},"content":{"rendered":"<p>Haswell \u306e\u65b0\u6a5f\u80fd\u306f\u3044\u308d\u3044\u308d\u3042\u308a\u307e\u3059\u304c\u3001\u5168\u4e16\u754c\u304b\u3089\uff08\uff1f\uff09\u5207\u671b\u3055\u308c\u3066\u3044\u305f\u306e\u304c\u3053\u306e VGATHER \u7cfb\u547d\u4ee4\u3067\u3059\u3002<\/p>\n<p><!--more--><\/p>\n<p>VGATHER \u7cfb\u547d\u4ee4\u306f\u3001SIMD \u30ec\u30b8\u30b9\u30bf\u306e\u5404\u8981\u7d20\u3092\u30a2\u30c9\u30ec\u30b9\uff08\u6b63\u78ba\u306b\u306f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\uff09\u3068\u3057\u3066\u5bfe\u5fdc\u3059\u308b\u30c7\u30b9\u30c6\u30a3\u30cd\u30fc\u30b7\u30e7\u30f3\u30ec\u30b8\u30b9\u30bf\u306e\u4f4d\u7f6e\u306b\u30ed\u30fc\u30c9\u3059\u308b\u547d\u4ee4\u3067\u3001\u30de\u30b9\u30af\u3092\u304b\u3051\u308b\u3068\u305d\u306e\u90e8\u5206\u306b\u3064\u3044\u3066\u306f\u30a2\u30af\u30bb\u30b9\u305b\u305a\u30c7\u30b9\u30c6\u30a3\u30cd\u30fc\u30b7\u30e7\u30f3\u30ec\u30b8\u30b9\u30bf\u306f\u7dad\u6301\u3055\u308c\u307e\u3059\u3002\u6b8b\u5ff5\u306a\u304c\u3089\u9006\u306e\u3053\u3068\u3092\u3059\u308bVSCATTER\u306fAVX2\u306b\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001AVX-512 \u3067\u8ffd\u52a0\u3055\u308c\u308b\u4e88\u5b9a\u3067\u3059\u3002<\/p>\n<p>32bit\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306732bit\u306e\u6574\u6570\u3092\u30ed\u30fc\u30c9\u3059\u308b VPGATHERDD \u3060\u3068\u7591\u4f3c\u30b3\u30fc\u30c9\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\uff08ymm1\uff5e3 \u306f256bit\u306e\u30ec\u30b8\u30b9\u30bf\u309232bit\u306e8\u8981\u7d20\u306e\u914d\u5217\u3068\u3057\u3066\u6271\u3063\u3066\u3044\u307e\u3059\uff09<\/p>\n<blockquote>\n<pre>VGATHERDD ymm1, vm32y, ymm2\r\n          ^dst  ^src   ^mask\r\nvm32y = [r1  + ymm3 * scale + disp]\r\n         ^base ^index(signed)\r\n\r\nfor (i = 0; i < 8; i++) {\r\n    if (ymm2[i] &#038; (1 << 31))\r\n        ymm1[i] = MEM32[r1 + ymm3[i] * scale + disp];\r\n    else\r\n        NOTHING; \/\/ not be zero-ed\r\n}\r\nymm2 = {0}; \/\/ mask register is cleared!!\r\n<\/pre>\n<\/blockquote>\n<p>\u3053\u3053\u3067\u30013\u3064\u51fa\u3066\u304f\u308b SIMD \u30ec\u30b8\u30b9\u30bf\u306f\u3059\u3079\u3066\u7570\u306a\u308b\u3082\u306e\u3067\u306a\u3051\u308c\u3070\u3044\u3051\u307e\u305b\u3093\uff08\u540c\u3058\u3082\u306e\u304c\u51fa\u3066\u304f\u308b\u3068\u7121\u52b9\u547d\u4ee4\u4f8b\u5916\u306b\u306a\u308b\uff09\u3002\u3057\u304b\u3057\u306a\u3093\u3067\u308f\u3056\u308f\u3056\u30de\u30b9\u30af\u30ec\u30b8\u30b9\u30bf\u3092\u30af\u30ea\u30a2\u3059\u308b\u3093\u3067\u3059\u304b\u306d\u3053\u308c\u3002<\/p>\n<p>\u3088\u3046\u3084\u304f\u8ffd\u52a0\u3055\u308c\u305f\uff01\u3068\u601d\u3063\u305f\u3089\u2026\u3068\u3044\u3046\u304bHaswell\u304c\u767a\u58f2\u3055\u308c\u308b\u524d\u306e2013\u5e74\u6625\u306eIDF\u3067\u3001Haswell\u306eVGATHER\u7cfb\u547d\u4ee4\u306f\u305d\u3082\u305d\u3082\u6b8b\u5ff5\u6027\u80fd\u3067\u3042\u308b\u3053\u3068\u304c\u30a2\u30ca\u30a6\u30f3\u30b9\u3055\u308c\u3066\u3044\u305f\u3088\u3046\u3067\u3059\uff08<a href=\"https:\/\/intel.activeevents.com\/bj13\/scheduler\/catalog\/catalog.jsp?sy=4411\">\u3053\u3053<\/a>\u306eARCS003\u306e\u300cSlide Number 55\u300d\u306e\u3068\u3053\u308d\uff09\u3002\u300cWill get improvement in Intel next generation CPU\u300d\u3063\u3066\u66f8\u3044\u3066\u3042\u308a\u307e\u3059\u304c\u3001Skylake \u3067\u306f\u307e\u3042\u671f\u5f85\u3067\u304d\u308b\u3068\u3057\u3066\u3001Broadwell \u3067\u306f\u6539\u5584\u3055\u308c\u308b\u3093\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<p>\u6c17\u3092\u53d6\u308a\u76f4\u3057\u3066Intel\u6700\u9069\u5316\u30de\u30cb\u30e5\u30a2\u30eb\u3092\u898b\u3066\u307f\u308b\u3068\u3001\u3053\u3046\u3044\u3046\u6642\u306b\u306fVGATHER\u3092\u4f7f\u3046\u306a\u3068\u66f8\u3044\u3066\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u30b7\u30fc\u30b1\u30f3\u30b7\u30e3\u30eb\u306a\u30a2\u30af\u30bb\u30b9 &#8211; \u666e\u901a\u306e\u30ed\u30fc\u30c9\uff08VMOV[AU]P[SD]\/VMOVDQ[AU]\uff09 \u3092\u4f7f\u3046\u3079\u304d<\/li>\n<li>\u30ed\u30fc\u30c9\u3059\u308b\u306e\u304c4\u8981\u7d20\u4ee5\u4e0b &#8211; \u666e\u901a\u306b\u30ed\u30fc\u30c9\u3057\u305f\u5f8c\u4e26\u3073\u66ff\u3048\u308b\u3079\u304d<\/li>\n<li>\u5c0f\u3055\u3044\u30b9\u30c8\u30e9\u30a4\u30c9\uff08\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u5024\u304c\u72ed\u3044\u7bc4\u56f2\u306b\u53ce\u307e\u3063\u3066\u3044\u308b\uff09 &#8211; \u4f55\u56de\u304b\u666e\u901a\u306b\u30ed\u30fc\u30c9\u3057\u305f\u5f8c\u30b7\u30e3\u30c3\u30d5\u30eb\u7b49\u3067\u4e26\u3073\u66ff\u3048\u308b\u3079\u304d<\/li>\n<li>\u4f4d\u7f6e\u306e\u5165\u308c\u66ff\u3048 &#8211; \u666e\u901a\u306b\u30ed\u30fc\u30c9\u3057\u305f\u5f8c\u30b7\u30e3\u30c3\u30d5\u30eb\u7b49\u3067\u4e26\u3073\u66ff\u3048\u308b\u3079\u304d<\/li>\n<li>\u5197\u9577\u306a\u8981\u7d20\uff08\u540c\u3058\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u8907\u6570\u56de\u51fa\u3066\u304f\u308b\uff09 &#8211; 1\u56deVGATHER\u3057\u305f\u5f8c\u30b7\u30e3\u30c3\u30d5\u30eb\u7b49\u3067\u4e26\u3073\u66ff\u3048\u308b\u3079\u304d<\/li>\n<\/ul>\n<p>\u3053\u308c\u3089\u306f\u8907\u6570\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u5024\u306e\u9593\u306e\u95a2\u4fc2\u304c\u3042\u3089\u304b\u3058\u3081\u4e88\u6e2c\u3067\u304d\u308b\u5834\u5408\u3092\u610f\u5473\u3057\u3066\u3044\u308b\u3088\u3046\u306a\u8a18\u8ff0\u306b\u306a\u3063\u3066\u3044\u308b\u306e\u3067\u3001\u305d\u308a\u3083\u666e\u901a\u306b\u30ed\u30fc\u30c9\u3057\u305f\u65b9\u304c\u901f\u3044\u306e\u306f\u3042\u308b\u610f\u5473\u5f53\u305f\u308a\u524d\u3067\u3059\u3002<\/p>\n<p>\u9006\u306b\u3053\u3046\u3044\u3046\u6642\u306bVGATHER\u3092\u4f7f\u3048\u3068\u66f8\u3044\u3066\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>4\u8981\u7d20\u4ee5\u4e0a\u3067\u56fa\u5b9a\u3067\u306a\u3044\u30de\u30b9\u30af &#8211; \u56fa\u5b9a\u3067\u306a\u3044\u30de\u30b9\u30af\u3092\u666e\u901a\u306e\u30ed\u30fc\u30c9\u3067\u884c\u304a\u3046\u3068\u3059\u308b\u3068\u3001\u5206\u5c90\u4e88\u6e2c\u304c\u5931\u6557\u3059\u308b\u3053\u3068\u306b\u3088\u308b\u6027\u80fd\u4f4e\u4e0b\u304c\u3042\u308b<\/li>\n<li>8\u8981\u7d20\u3067\u30d9\u30af\u30bf\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\uff08SIMD\u6f14\u7b97\u3057\u305f\u7d50\u679c\u304c\u305d\u306e\u307e\u307e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u306a\u308b\uff09 &#8211; \u305d\u3082\u305d\u3082\u3053\u308c\u3053\u305d\u304cVGATHER\u306e\u76ee\u7684\u3068\u3059\u308b\u3068\u3053\u308d\u3067\u3042\u308b<\/li>\n<\/ul>\n<p>8\u8981\u7d20\u672a\u6e80\u3067\u30d9\u30af\u30bf\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u5834\u5408\u306f\u3069\u3046\u306a\u3093\u3067\u3057\u3087\u3046\u306d\u2026\uff08\u4ffa\u304c\u3084\u308a\u305f\u3044\u306e\u306f4\u8981\u7d20\u3067\u30d9\u30af\u30bf\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3067\u56fa\u5b9a\u3067\u306f\u306a\u3044\u304c\u504f\u308a\u306e\u5927\u304d\u3044\u30de\u30b9\u30af\uff09<\/p>\n<p>\u5177\u4f53\u7684\u306a\u901f\u3055\u306b\u3064\u3044\u3066\u306f<a href=\"http:\/\/d.hatena.ne.jp\/w_o\/20130602\">\u3061\u3087\u3063\u3068\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u3057\u305f\u4eba\u304c\u3044\u308b<\/a>\uff08w_o\u3055\u3093\u304a\u4e16\u8a71\u306b\u306a\u3063\u3066\u307e\u3059\uff09\u306e\u3067\u3059\u304c\u3001\u3053\u306e\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u306f\u3069\u3061\u3089\u304b\u3068\u3044\u3046\u3068\u300c\u3053\u3046\u3044\u3046\u6642\u306b\u306f\u4f7f\u3046\u306a\u300d\u306e\u30b1\u30fc\u30b9\u306b\u5165\u308b\uff08Haswell\u306b\u5bfe\u5fdc\u3057\u305f\u6700\u9069\u5316\u30de\u30cb\u30e5\u30a2\u30eb\u304c\u51fa\u308b\u524d\u306e\u8a18\u4e8b\u306a\u306e\u3067\u4ed5\u65b9\u306a\u3044\u3093\u3067\u3059\u304c\uff09\u305f\u3081\u3001VGATHER \u306a\u3089\u3067\u306f\u306e\u4f7f\u3044\u65b9\u3092\u3057\u305f\u5834\u5408\u306b\u3069\u308c\u304f\u3089\u3044\u901f\u3044\u304b\uff08\u3068\u3044\u3046\u304b\u9045\u3044\u304b\uff09\u306f\u5206\u304b\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u305f\u3076\u3093\u305d\u306e\uff12\u306b\u7d9a\u304f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Haswell \u306e\u65b0\u6a5f\u80fd\u306f\u3044\u308d\u3044\u308d\u3042\u308a\u307e\u3059\u304c\u3001\u5168\u4e16\u754c\u304b\u3089\uff08\uff1f\uff09\u5207\u671b\u3055\u308c\u3066\u3044\u305f\u306e\u304c\u3053\u306e VGATHER \u7cfb\u547d\u4ee4\u3067\u3059\u3002<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27],"tags":[],"class_list":["post-4266","post","type-post","status-publish","format-standard","hentry","category-technology"],"_links":{"self":[{"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/4266","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4266"}],"version-history":[{"count":13,"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/4266\/revisions"}],"predecessor-version":[{"id":4279,"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/4266\/revisions\/4279"}],"wp:attachment":[{"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4266"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4266"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}