{"id":45,"date":"2021-07-18T14:22:45","date_gmt":"2021-07-18T06:22:45","guid":{"rendered":"https:\/\/www.52dixiaowo.com\/zcyl\/?p=45"},"modified":"2021-07-18T18:03:25","modified_gmt":"2021-07-18T10:03:25","slug":"%e8%ae%a1%e7%bb%84-%e6%9c%9f%e6%9c%ab%e5%a4%8d%e4%b9%a0-%e8%ae%a1%e7%ae%97%e9%a2%98","status":"publish","type":"post","link":"https:\/\/www.52dixiaowo.com\/zcyl\/post-45.html","title":{"rendered":"\u8ba1\u7ec4 \u671f\u672b\u590d\u4e60-\u8ba1\u7b97\u9898"},"content":{"rendered":"\n<h4>1\u3001\u8bbe\u6d6e\u70b9\u6570\u683c\u5f0f\u4e3a\uff1a\u9636\u78015\u4f4d\uff08\u542b1\u4f4d\u9636\u7b26\uff09\uff0c\u5c3e\u657011\u4f4d\uff08\u542b1\u4f4d\u6570\u7b26\uff09\u3002\u5199\u51fa31.125\u6240\u5bf9\u5e94\u7684\u673a\u5668\u6570\u3002\u8981\u6c42\u5982\u4e0b\uff1a<\/h4>\n\n\n\n<ul><li>\uff081\uff09\u9636\u7801\u548c\u5c3e\u6570\u5747\u4e3a\u539f\u7801\u3002<\/li><li>\uff082\uff09\u9636\u7801\u548c\u5c3e\u6570\u5747\u4e3a\u8865\u7801\u3002<\/li><li>\uff083\uff09\u9636\u7801\u4e3a\u79fb\u7801\uff0c\u5c3e\u6570\u4e3a\u8865\u7801\u3002<\/li><\/ul>\n\n\n\n<p><strong>\u7b54\u6848\uff1a<\/strong><\/p>\n\n\n\n<p>\u4ee4 x = 31.125\uff0c \u5176\u4e8c\u8fdb\u5236\u8868\u793a x = 11111.001 <\/p>\n\n\n\n<p>\u521d\u6b65\u683c\u5f0f\u5316\u540e\u7684x\u8868\u793a\u4e3a\uff1a x = 0.1111100100 x 2^5<\/p>\n\n\n\n<p>\u5219\u9488\u5bf9\u6240\u6c42\u7684\u89c4\u5219\u5316<\/p>\n\n\n\n<ol><li>\u3010x\u3011\u539f     = 0\uff0c0101\uff1b0.1111100100<\/li><li>\u3010x\u3011\u8865     = 0\uff0c0101\uff1b0.1111100100<\/li><li>\u3010x\u3011\u79fb\u8865  = 1\uff0c0101\uff1b0.1111100100<\/li><\/ol>\n\n\n\n<h4>2\u3001\u8bbe\u673a\u5668\u6570\u5b57\u957f\u4e3a8\u4f4d\uff08\u542b1\u4f4d\u7b26\u53f7\u4f4d\uff09\uff0cA=+11\/32\uff0cB=+13\/32\uff0c\u7528\u8865\u7801\u8fd0\u7b97\u89c4\u5219\u8ba1\u7b97A+B\u548cA-B\u3002<\/h4>\n\n\n\n<p><strong>\u7b54\u6848\uff1a<\/strong><\/p>\n\n\n\n<p>\u3010A\u3011\u4e8c\u8fdb\u5236 = 0.0101100\uff0c\u3010B\u3011\u4e8c\u8fdb\u5236 = 0.0110100<\/p>\n\n\n\n<p>\u3010A\u3011\u8865 = 0.0101100\uff0c\u3010B\u3011\u8865 = 0.0110100<\/p>\n\n\n\n<p>\u3010A+B\u3011\u8865 = 0.0101100 + 0.0110100 = 0.1100000\uff0c\u65e0\u6ea2\u51fa<\/p>\n\n\n\n<p>A + B = 0.1100000 = 0.75<\/p>\n\n\n\n<p>\u3010-B\u3011= -13\/32\uff0c\u5373 \u3010-B\u3011\u4e8c\u8fdb\u5236 = -0.0110100<\/p>\n\n\n\n<p>\u3010-B\u3011\u8865 = 1.1001100<\/p>\n\n\n\n<p>\u3010A-B\u3011\u8865 = \u3010A\u3011\u8865 + \u3010-B\u3011\u8865 = 0.0101100+1.1001100=1.1111000\u65e0\u6ea2\u51fa<\/p>\n\n\n\n<p>A-B = 1.1111000 = -0.0001000 = -0.0625 = -1\/16<\/p>\n\n\n\n<h4>3\u3001\u8bbe\u673a\u5668\u5b57\u957f\u4e3a16\u4f4d\uff0c\u5b9a\u70b9\u8868\u793a\u65f6\uff0c\u6570\u503c\u4e3a15\u4f4d\uff0c\u7b26\u53f71\u4f4d\u3002\u8bd5\u95ee\uff1a<\/h4>\n\n\n\n<p>\uff081\uff09\u5b9a\u70b9\u539f\u7801\u6574\u6570\u8868\u793a\u65f6\uff0c\u6700\u5927\u6b63\u6570\u4e3a\u591a\u5c11\uff1f\u6700\u5c0f\u8d1f\u6570\u4e3a\u591a\u5c11\uff1f<\/p>\n\n\n\n<p><strong>\u7b54\u6848\uff1a<\/strong>\u6700\u5927\u6b63\u6570\uff1a 2^15-1\uff0c\u6700\u5c0f\u8d1f\u6570\uff1a-(2^15-1)<\/p>\n\n\n\n<p>\uff082\uff09\u5b9a\u70b9\u8865\u7801\u5c0f\u6570\u8868\u793a\u65f6\uff0c\u6700\u5927\u6b63\u6570\u4e3a\u591a\u5c11\uff1f\u6700\u5c0f\u8d1f\u6570\u4e3a\u591a\u5c11\uff1f<\/p>\n\n\n\n<p><strong>\u7b54\u6848\uff1a<\/strong>\u6700\u5927\u6b63\u6570\uff1a1-2^(-15)\uff0c\u6700\u5c0f\u8d1f\u6570\uff1a-1<\/p>\n\n\n\n<h4>4\u3001\u67d0\u8ba1\u7b97\u673a\u4e3b\u9891\u4e3a800MHz\uff0c\u6bcf\u4e2a\u673a\u5668\u5468\u671f\u5e73\u5747\u5305\u542b2\u4e2a\u65f6\u949f\u5468\u671f\uff0c\u6bcf\u4e2a\u6307\u4ee4\u5468\u671f\u5e73\u5747\u5305\u62ec2.5\u4e2a\u673a\u5668\u5468\u671f\uff0c\u6c42\u8be5\u8ba1\u7b97\u673a\u7684\u5e73\u5747\u6307\u4ee4\u6267\u884c\u901f\u5ea6\u4e3a\u591a\u5c11MIPS\u3002<\/h4>\n\n\n\n<p><strong>\u7b54\u6848\uff1a<\/strong>800\/\uff082.5\uff09\/2 = 160 MIPS<\/p>\n\n\n\n<h4>5\u3001\u67d0\u673a\u4e3b\u5b58\u50a8\u5668\u670916\u4f4d\u5730\u5740\uff0c\u5b57\u957f\u4e3a8\u4f4d\u3002<\/h4>\n\n\n\n<p>(1) \u91c7\u75281K x 4\u4f4d\u7684RAM\u82af\u7247\u6784\u6210\u8be5\u5b58\u50a8\u5668\uff0c\u9700\u8981\u591a\u5c11\u7247\u82af\u7247\uff1f<\/p>\n\n\n\n<p><strong>\u7b54\u6848\uff1a<\/strong>1K x 4\u4f4d\u76842\u7247\u7ec4\u62101K x 8\u4e3a\u4e00\u7ec4\uff0c\u9700\u898164\uff082^16\/1K=64)\u7ec4\uff0c\u5171128\u7247<\/p>\n\n\n\n<p>(2) \u8be5\u5b58\u50a8\u5668\u80fd\u5b58\u653e\u591a\u5c11\u5b57\u8282\u7684\u4fe1\u606f\uff1f<\/p>\n\n\n\n<p><strong>\u7b54\u6848\uff1a<\/strong>2^16*8\u662f\u603b\u4f4d\u6570\uff0c\u800c8\u4f4d\u8868\u793a\u4e00\u4e2a\u5b57\u8282\uff0c\u52192^16*8\/8=2^16=64K\u3002<\/p>\n\n\n\n<p>(3) \u7247\u9009\u903b\u8f91\u9700\u8981\u591a\u5c11\u4f4d\u5730\u5740\uff1f<\/p>\n\n\n\n<p><strong>\u7b54\u6848\uff1a<\/strong>\u82af\u7247\u5185\u90e8\u4e3a1K\uff0c\u53732^10\uff0c\u5219\u7247\u5185\u9700\u898110\u4f4d\uff0c\u5269\u4f5916-10=6\u4f5c\u4e3a\u7247\u9009\u903b\u8f91\u3002<\/p>\n\n\n\n<h4>6\u3001\u6709\u4e00\u4e2a\u5177\u670920\u4f4d\u5730\u5740\u548c32\u4f4d\u5b57\u957f\u7684\u5b58\u50a8\u5668\uff0c\u95ee\uff1a<\/h4>\n\n\n\n<p>\uff081\uff09\u8be5\u5b58\u50a8\u5668\u80fd\u5b58\u50a8\u591a\u5c11\u4e2a\u5b57\u8282\u7684\u4fe1\u606f\uff1f<\/p>\n\n\n\n<p><strong>\u7b54\u6848\uff1a<\/strong>2^20*32\/8 = 1M*4=4MB<\/p>\n\n\n\n<p>\uff082\uff09\u5982\u679c\u5b58\u50a8\u5668\u7531512K\u00d78\u4f4dSRAM\u82af\u7247\u7ec4\u6210\uff0c\u9700\u8981\u591a\u5c11\u82af\u7247\uff1f<\/p>\n\n\n\n<p><strong>\u7b54\u6848\uff1a<\/strong>512K x 8\u4f4d\u76844\u7247\u7ec4\u6210\u4e00\u7ec4\u5145\u5f53512K x 32\u4f4d\u82af\u7247\uff0c\u9700\u89812\u7ec4\uff0c\u5219\u5171\u9700\u89818\u7247<\/p>\n\n\n\n<p>\uff083\uff09\u9700\u8981\u591a\u5c11\u4f4d\u5730\u5740\u4f5c\u82af\u7247\u9009\u62e9\uff1f<\/p>\n\n\n\n<p><strong>\u7b54\u6848\uff1a<\/strong>\u7247\u5185512K\uff0c\u53732^19, \u5219\u7247\u5185\u9700\u898119\u4f4d\uff0c\u5269\u4f5920-19=1\u4f4d\uff0c\u4f5c\u4e3a\u7247\u9009\u3002<\/p>\n\n\n\n<h4>7\u3001\u8bbe\u5b58\u50a8\u5668\u5bb9\u91cf\u4e3a32\u5b57\uff0c\u5b57\u957f64\u4f4d\uff0c\u6a21\u5757\u6570m = 4\uff0c\u5206\u522b\u7528\u987a\u5e8f\u65b9\u5f0f\u548c\u4ea4\u53c9\u65b9\u5f0f\u8fdb\u884c\u7ec4\u7ec7\u3002\u5b58\u50a8\u5468\u671fT = 200ns,\u6570\u636e\u603b\u7ebf\u5bbd\u5ea6\u4e3a64\u4f4d\uff0c\u603b\u7ebf\u5468\u671f\u03c4= 50ns .\u95ee\u987a\u5e8f\u5b58\u50a8\u5668\u548c\u4ea4\u53c9\u5b58\u50a8\u5668\u7684\u5e26\u5bbd\u5404\u662f\u591a\u5c11\uff1f<\/h4>\n\n\n\n<p><strong>\u7b54\u6848\uff1a<\/strong><\/p>\n\n\n\n<p>\u987a\u5e8f\u5b58\u50a8\u5e26\u5bbd\uff1a\uff0864*4\uff09\/\uff084*200ns\uff09= 0.32x 10^9 = 32 x 10^7( \u4f4d\/\u79d2\uff09<\/p>\n\n\n\n<p>\u4ea4\u53c9\u5b58\u50a8\u5e26\u5bbd\uff1a\uff0864*4\uff09\/\uff08200+3*50ns\uff09= 73 x 10^7( b\/s )<\/p>\n\n\n\n<h4>8\u3001CPU\u6267\u884c\u4e00\u6bb5\u7a0b\u5e8f\u65f6\uff0cCache\u5b8c\u6210\u5b58\u53d6\u7684\u6b21\u6570\u4e3a1900\u6b21\uff0c\u4e3b\u5b58\u5b8c\u6210\u5b58\u53d6\u7684\u6b21\u6570\u4e3a100\u6b21\uff0c\u5df2\u77e5Cache\u5b58\u53d6\u5468\u671f\u4e3a50ns\uff0c\u4e3b\u5b58\u5b58\u53d6\u5468\u671f\u4e3a250ns\u3002\u8bd5\u95ee\uff1a<\/h4>\n\n\n\n<p>(1)\u5e73\u5747\u8bbf\u95ee\u65f6\u95f4<strong>\u3002<\/strong><\/p>\n\n\n\n<p><strong>\u7b54\u6848\uff1a<\/strong>\uff081900*50+250*100\uff09\/\uff081900+100\uff09= 60 ns<\/p>\n\n\n\n<p>(2)Cache\/\u4e3b\u5b58\u7cfb\u7edf\u7684\u6548\u7387\u3002<\/p>\n\n\n\n<p><strong>\u7b54\u6848\uff1a<\/strong>\u7cfb\u7edf\u6548\u7387=\u5b58\u53d6\u5468\u671f\/\u5e73\u5747\u8bbf\u95ee\u65f6\u95f4=50\/60=83.33%<\/p>\n\n\n\n<h4>9\u3001\u4e00\u4e2a\u7ec4\u76f8\u8fde\u6620\u5c04\u7684Cache\u753164\u5757\u7ec4\u6210\uff0c\u6bcf\u7ec4\u5185\u5305\u542b4\u5757\u3002\u4e3b\u5b58\u5305\u542b4096\u5757\uff0c\u6bcf\u5757\u7531128\u5b57\u7ec4\u6210\uff0c\u8bbf\u5b58\u5730\u5740\u4e3a\u5b57\u5730\u5740\u3002\u8bd5\u95ee\u4e3b\u5b58\u548c\u9ad8\u901f\u5b58\u50a8\u5668\u7684\u5730\u5740\u5404\u4e3a\u51e0\u4f4d\uff1f\u753b\u51fa\u4e3b\u5b58\u5730\u5740\u683c\u5f0f\u3002<\/h4>\n\n\n\n<p><strong>\u7b54\u6848\uff1a<\/strong><\/p>\n\n\n\n<p>Cache\u5bb9\u91cf\u4e3a\uff1a 64*128 = 2^13\uff0c<\/p>\n\n\n\n<p>Cache\u5730\u574013\u4f4d<\/p>\n\n\n\n<p>Cache\u7ec4\u6570\u4e3a\uff1a64\/4 = 16<\/p>\n\n\n\n<p>\u4e3b\u5b58\u5171\u5206\u4e3a\uff1a 4096\/16 = 256\u533a\uff0c\u6bcf\u533a16\u5757<\/p>\n\n\n\n<p>\u4e3b\u5b58\u5bb9\u91cf\u4e3a\uff1a4096*128 = 2^19\uff0c\u4e3b\u5b58\u5730\u574019\u4f4d<\/p>\n\n\n\n<p>\u5b57\u5757\u5185\u5730\u5740\u4e3a\uff1a 128 = 2^7 ==&gt; 7\u4f4d<\/p>\n\n\n\n<p>\u4e3b\u5b58\u5b57\u5757\u4f4d\u6570 = 19-4-7 = 8 \u4f4d\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-regular\"><table><tbody><tr><td>\u4e3b\u5b58\u5b57\u5b57\u5757\u8bb08\u4f4d<\/td><td>\u7ec4\u5730\u57404\u4f4d<\/td><td>\u5b57\u5757\u5185\u5730\u57407\u4f4d<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h4>10\u3001\u5047\u8bbe\u6307\u4ee4\u5b57\u957f\u4e3a16\u4f4d\uff0c\u64cd\u4f5c\u6570\u7684\u5730\u5740\u7801\u4e3a6\u4f4d\uff0c\u6307\u4ee4\u6709\u96f6\u5730\u5740\u548c\u4e00\u5730\u5740\u4e24\u79cd\u683c\u5f0f\u3002<\/h4>\n\n\n\n<p>\uff081\uff09\u8bbe\u64cd\u4f5c\u7801\u56fa\u5b9a\uff0c\u96f6\u5730\u5740\u6307\u4ee4\u6709512\u79cd\uff0c\u5219\u4e00\u5730\u5740\u6307\u4ee4\u6700\u591a\u6709\u51e0\u79cd\uff1f<\/p>\n\n\n\n<p><strong>\u7b54\u6848\uff1a<\/strong>\u64cd\u4f5c\u7801\u56fa\u5b9a\u4e3a16-6=10\u4f4d\uff0c\u4e00\u5730\u5740\u6307\u4ee4\u6700\u591a\u67092^10-512=512\u79cd<\/p>\n\n\n\n<p>\uff082\uff09\u91c7\u7528\u6269\u5c55\u64cd\u4f5c\u7801\u6280\u672f\uff0c\u96f6\u5730\u5740\u6307\u4ee4\u6709512\u79cd\uff0c\u5219\u4e00\u5730\u5740\u6307\u4ee4\u6700\u591a\u6709\u51e0\u79cd\uff1f<\/p>\n\n\n\n<p><strong>\u7b54\u6848\uff1a<\/strong>\u6269\u5c55\u6807\u5fd7\u987b8\u4e2a\uff0c\u4e00\u6307\u4ee4\u5730\u5740\u4e3a1024-8 = 1016\u79cd\u3002<\/p>\n\n\n\n<h4>11\u3001\u57285\u4e2a\u529f\u80fd\u6bb5\u7684\u6307\u4ee4\u6d41\u6c34\u7ebf\u4e2d\uff0c\u5047\u8bbe\u6bcf\u6bb5\u7684\u6267\u884c\u65f6\u95f4\u5206\u522b\u662f10ns\u30018ns\u300110ns\u300110ns\u548c7ns\u3002\u5bf9\u4e8e\u5b8c\u621020\u6761\u6307\u4ee4\u7684\u6d41\u6c34\u7ebf\u800c\u8a00\uff0c\u5176\u52a0\u901f\u6bd4\u4e3a\u591a\u5c11\uff1f\u8be5\u6d41\u6c34\u7ebf\u7684\u5b9e\u9645\u541e\u5410\u7387\u4e3a\u591a\u5c11\uff1f<\/h4>\n\n\n\n<p><strong>\u7b54\u6848\uff1a<\/strong><\/p>\n\n\n\n<p>\u6d41\u6c34\u7ebf\u91c7\u7528\u6bcf\u6bb5\u65f6\u95f4\u53d6\u6700\u5927\u503c\uff0c\u5373\u5f9710ns\uff0c<\/p>\n\n\n\n<p>\u4f7f\u7528\u6d41\u6c34\u7ebf\u5b8c\u621012\u6761\u6307\u4ee4\u6240\u9700\u65f6\u95f4\u4e3a\uff1a12*10+4*10=160ns<\/p>\n\n\n\n<p>\u4e0d\u4f7f\u7528\u6d41\u6c34\u7ebf\u65f6\uff1a12*\uff0810+8+10+10+7\uff09=540ns<\/p>\n\n\n\n<p>\u52a0\u901f\u6bd4\u4e3a 540\/160 = 3.375<\/p>\n\n\n\n<p>\u541e\u5410\u7387\u4e3a\uff1a12\/160ns  = 75MIPS<\/p>\n\n\n\n<h4>12\u3001\u6709\u4e00\u4e2a16K x 16\u4f4d\u7684\u5b58\u50a8\u5668\uff0c\u75311K x 4\u7684\u52a8\u6001RAM\u82af\u7247\u6784\u6210\uff08\u82af\u7247\u662f64 x 64\u7ed3\u6784\uff09\uff0c\u95ee\uff1a<\/h4>\n\n\n\n<p>\uff081\uff09\u91c7\u7528\u5f02\u6b65\u5237\u65b0\u65b9\u5f0f\uff0c\u5982\u679c\u5355\u5143\u5237\u65b0\u95f4\u9694\u4e0d\u8d85\u8fc7\uff12ms\uff0c\u5219\u5237\u65b0\u4fe1\u53f7\u5468\u671f\u662f\u591a\u5c11\uff1f<\/p>\n\n\n\n<p><strong>\u7b54\u6848\uff1a<\/strong>\u9700\u8981\u628a64\u884c\u5237\u65b0\u4e00\u904d\uff0c\u53732ms\/64=31.25\u03bcs \u2248 30\u03bcs<\/p>\n\n\n\n<p>\uff082\uff09\u82e5\u91c7\u7528\u96c6\u4e2d\u5237\u65b0\u65b9\u5f0f\uff0c\u5b58\u50a8\u5668\u5237\u65b0\u4e00\u904d\u6700\u5c11\u7528\u591a\u5c11\u4e2a\u8bfb\/\u5199\u5468\u671f\uff1f<\/p>\n\n\n\n<p><strong>\u7b54\u6848\uff1a<\/strong>\u56e0\u4e3a\u82af\u7247\u6392\u5217\u4e3a 64 x 64, \u5219\u5237\u65b0\u4e00\u904d\u81f3\u5c11\u9700\u8981 64 \u4e2a\u8bfb\/\u5199\u5468\u671f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1\u3001\u8bbe\u6d6e\u70b9\u6570\u683c\u5f0f\u4e3a\uff1a\u9636\u78015\u4f4d\uff08\u542b1\u4f4d\u9636\u7b26\uff09\uff0c\u5c3e\u657011\u4f4d\uff08\u542b1\u4f4d\u6570\u7b26\uff09\u3002\u5199\u51fa31.125\u6240\u5bf9\u5e94\u7684\u673a\u5668\u6570\u3002\u8981\u6c42\u5982\u4e0b&hellip; <a href=\"https:\/\/www.52dixiaowo.com\/zcyl\/post-45.html\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb <span class=\"screen-reader-text\">\u8ba1\u7ec4 \u671f\u672b\u590d\u4e60-\u8ba1\u7b97\u9898<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[6],"tags":[],"_links":{"self":[{"href":"https:\/\/www.52dixiaowo.com\/zcyl\/wp-json\/wp\/v2\/posts\/45"}],"collection":[{"href":"https:\/\/www.52dixiaowo.com\/zcyl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.52dixiaowo.com\/zcyl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/zcyl\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/zcyl\/wp-json\/wp\/v2\/comments?post=45"}],"version-history":[{"count":1,"href":"https:\/\/www.52dixiaowo.com\/zcyl\/wp-json\/wp\/v2\/posts\/45\/revisions"}],"predecessor-version":[{"id":51,"href":"https:\/\/www.52dixiaowo.com\/zcyl\/wp-json\/wp\/v2\/posts\/45\/revisions\/51"}],"wp:attachment":[{"href":"https:\/\/www.52dixiaowo.com\/zcyl\/wp-json\/wp\/v2\/media?parent=45"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/zcyl\/wp-json\/wp\/v2\/categories?post=45"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/zcyl\/wp-json\/wp\/v2\/tags?post=45"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}