{"id":143,"date":"2020-05-13T15:03:07","date_gmt":"2020-05-13T06:03:07","guid":{"rendered":"https:\/\/tanabiki.com\/?page_id=143"},"modified":"2020-05-13T15:03:07","modified_gmt":"2020-05-13T06:03:07","slug":"log%e8%a8%88%e7%ae%97","status":"publish","type":"page","link":"https:\/\/tanabiki.com\/?page_id=143","title":{"rendered":"LOG\u8a08\u7b97"},"content":{"rendered":"\n

\u81ea\u7136\u5bfe\u6570(Ln)\u3092\u8a08\u7b97\u3059\u308b\u56de\u8def\u3067\u3059\u3002
10\u3092\u5e95\u3068\u3059\u308bLog \u306b\u5909\u66f4\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u3082\u3063\u3068\u3082\u5e95\u306e\u5909\u63db\u516c\u5f0f\u3092\u4f7f\u3048\u3070\u3001
\u4e57\u7b97\u5668\u3092\u8ffd\u52a0\u3059\u308b\u3060\u3051\u3067\u3069\u3093\u306a\u5e95\u306eLog\u3082\u8a08\u7b97\u3067\u304d\u307e\u3059\u304c\u3002
\u6bce\u30af\u30ed\u30c3\u30af\u9023\u7d9a\u3057\u3066\u30c7\u30fc\u30bf\u3092\u5165\u529b\u3067\u304d\u3001\u56fa\u5b9a\u9045\u5ef6\u3067\u7d50\u679c\u3092\u51fa\u529b\u3057\u307e\u3059\u3002
Lattice FPGA (ECP2M) \u306e\u5834\u5408\u306f\u3001\uff18\u30af\u30ed\u30c3\u30af\u5f8c\u306b\u7d50\u679c\u3092\u51fa\u529b\u3057\u307e\u3059\u3002
FPGA\u306eRAM\u3068\u4e57\u7b97\u5668\u3092\u4f7f\u3063\u3066\u3044\u308b\u305f\u3081\u3001Xilinx, Altera \u306b\u79fb\u690d\u3057\u305f\u5834\u5408\u306b\u306f\u3001
\u9045\u5ef6\u91cf\u306f\u5909\u308f\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

 \u5165\u529b\u4fe1\u53f7<\/td><\/tr>
 \uff32\uff33\uff34<\/td> \u975e\u540c\u671f\u30ea\u30bb\u30c3\u30c8\u3000H\uff1d\u30ea\u30bb\u30c3\u30c8<\/td><\/tr>
 \uff23\uff2c\uff2b<\/td> \u30af\u30ed\u30c3\u30af<\/td><\/tr>
 DATA_IN[68..0]<\/td> y=Ln(x)\u306e\uff58\uff08x>0)\u3000\u6574\u6570\u90e852bit,\u5c11\u6570\u90e816bit<\/td><\/tr>
 \u51fa\u529b\u4fe1\u53f7<\/td><\/tr>
 LN[26..0]<\/td> y=Ln(x)\u306ey\u3000\u7b26\u53f7\u4ed8\u304d\u3001\u5c11\u6570\u90e82\uff11bit\u3000<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n


\u5165\u529b\u30c7\u30fc\u30bf\u306e\u30d3\u30c3\u30c8\u6570\u306f\u6bd4\u8f03\u7684\u5bb9\u6613\u306b\u5909\u66f4\u3067\u304d\u307e\u3059\u3002
\u51fa\u529b\u306e\u30d3\u30c3\u30c8\u6570\u3092\u5897\u3084\u3059\u3053\u3068\u306f\u3001\u5c11\u3005\u56f0\u96e3\u3067\u3059\u3002<\/p>\n\n\n\n

\u5165\u51fa\u529b\u306e\u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u753b\u9762<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

\u6bce\u30af\u30ed\u30c3\u30af\u30c7\u30fc\u30bf\u3092\u5165\u529b\u3067\u304d\u3001\uff18\u30af\u30ed\u30c3\u30af\u5f8c\u306b\u51fa\u529b\u3057\u307e\u3059\u3002
\u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u306f\u30011\/65536, 17.75, 0.125, 1000.5, 90000.625
\u3092\u5165\u529b\u3057\u305f\u5834\u5408\u3067\u3059\u3002<\/p>\n\n\n\n

\"\"\/<\/a><\/figure>\n\n\n\n

DATA_IN\u306e\u6574\u6570\u90e8DATA_IN[68..16]\u304cTP_DI, \u5c0f\u6570\u90e8DATA_IN[15..0]\u304cTP_DF \u3067\u3059\u3002
\u307e\u305f\u3001LN\u306e\u6574\u6570\u90e8LN[26..21]\u304cTP_LN_I, \u5c0f\u6570\u90e8LN[20..0]\u304cTP_LN_F\u3067\u3059\u3002

1\/65536 :
TP_DI=00_0000_0000_0000(h) , TP_DF=0001(h)
TP_LN_I=3A(h) , TP_LN_F=0E8E00(h) … -5.515166016
Ln(1\/65536)=-5.545177 \u306a\u306e\u3067\u3001\u5c0f\u6570\u70b9\u7b2c\uff14\u4f4d\u307e\u3067\u5408\u3063\u3066\u3044\u307e\u3059\u3002

17.75 :
TP_LN_I=01(h) , TP_LN_F=0E05A4(h) … 1.438188553
Ln(17.75)=1.438192 \u306a\u306e\u3067\u3001\u5c0f\u6570\u70b9\u7b2c\uff14\u4f4d\u307e\u3067\u5408\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u81ea\u7136\u5bfe\u6570(Ln)\u3092\u8a08\u7b97\u3059\u308b\u56de\u8def\u3067\u3059\u300210\u3092\u5e95\u3068\u3059\u308bLog \u306b\u5909\u66f4\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u3082\u3063\u3068\u3082\u5e95\u306e\u5909\u63db\u516c\u5f0f\u3092\u4f7f\u3048\u3070\u3001\u4e57\u7b97\u5668\u3092\u8ffd\u52a0\u3059\u308b\u3060\u3051\u3067\u3069\u3093\u306a\u5e95\u306eLog\u3082\u8a08\u7b97\u3067\u304d\u307e\u3059\u304c\u3002\u6bce\u30af\u30ed\u30c3\u30af\u9023\u7d9a\u3057\u3066\u30c7\u30fc\u30bf\u3092\u5165\u529b\u3067\u304d\u3001\u56fa\u5b9a\u9045\u5ef6\u3067\u7d50\u679c … <\/p>\n

“LOG\u8a08\u7b97” \u306e<\/span>\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"_links":{"self":[{"href":"https:\/\/tanabiki.com\/index.php?rest_route=\/wp\/v2\/pages\/143"}],"collection":[{"href":"https:\/\/tanabiki.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/tanabiki.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/tanabiki.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tanabiki.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=143"}],"version-history":[{"count":1,"href":"https:\/\/tanabiki.com\/index.php?rest_route=\/wp\/v2\/pages\/143\/revisions"}],"predecessor-version":[{"id":144,"href":"https:\/\/tanabiki.com\/index.php?rest_route=\/wp\/v2\/pages\/143\/revisions\/144"}],"wp:attachment":[{"href":"https:\/\/tanabiki.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}