{"id":802,"date":"2025-04-12T00:00:15","date_gmt":"2025-04-11T16:00:15","guid":{"rendered":"https:\/\/www.wunen.com\/index.php\/2025\/04\/12\/%e3%80%90%e8%ae%a1%e7%ae%97%e6%9c%ba%e4%bd%93%e7%b3%bb%e7%bb%93%e6%9e%84-05%e3%80%91%e6%b5%81%e6%b0%b4%e7%ba%bf%e5%86%92%e9%99%a9-pipeline-hazards-%e6%8e%a7%e5%88%b6%e5%86%92\/"},"modified":"2025-04-12T00:00:15","modified_gmt":"2025-04-11T16:00:15","slug":"%e3%80%90%e8%ae%a1%e7%ae%97%e6%9c%ba%e4%bd%93%e7%b3%bb%e7%bb%93%e6%9e%84-05%e3%80%91%e6%b5%81%e6%b0%b4%e7%ba%bf%e5%86%92%e9%99%a9-pipeline-hazards-%e6%8e%a7%e5%88%b6%e5%86%92","status":"publish","type":"post","link":"http:\/\/www.wunen.com\/index.php\/2025\/04\/12\/%e3%80%90%e8%ae%a1%e7%ae%97%e6%9c%ba%e4%bd%93%e7%b3%bb%e7%bb%93%e6%9e%84-05%e3%80%91%e6%b5%81%e6%b0%b4%e7%ba%bf%e5%86%92%e9%99%a9-pipeline-hazards-%e6%8e%a7%e5%88%b6%e5%86%92\/","title":{"rendered":"\u3010\u8ba1\u7b97\u673a\u4f53\u7cfb\u7ed3\u6784-05\u3011\u6d41\u6c34\u7ebf\u5192\u9669 (Pipeline Hazards)\u2014\u2014\u63a7\u5236\u5192\u9669 (Control Hazards)"},"content":{"rendered":"<div class=\"article_content clearfix\" id=\"article_content\">\n <link href=\"https:\/\/csdnimg.cn\/release\/blogv2\/dist\/mdeditor\/css\/editerView\/kdoc_html_views-1a98987dfd.css\" rel=\"stylesheet\"\/>\n <link href=\"https:\/\/csdnimg.cn\/release\/blogv2\/dist\/mdeditor\/css\/editerView\/ck_htmledit_views-704d5b9767.css\" rel=\"stylesheet\"\/>\n<div class=\"markdown_views prism-atom-one-dark\" id=\"content_views\">\n  <svg style=\"display: none;\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n   <path d=\"M5,0 0,2.5 5,5z\" id=\"raphael-marker-block\" stroke-linecap=\"round\" style=\"-webkit-tap-highlight-color: rgba(0, 0, 0, 0);\">\n   <\/path>\n  <\/svg><\/p>\n<h2>\n   <a id=\"1__Pipeline_Hazards_1\"><br \/>\n   <\/a><br \/>\n   1. \u6d41\u6c34\u7ebf\u5192\u9669 (Pipeline Hazards)<br \/>\n  <\/h2>\n<p>\n   \u5728\u6d41\u6c34\u7ebf\u5904\u7406\u5668\u4e2d\u4f1a\u6709\u8fd9\u6837\u7684\u60c5\u51b5\uff0c\u5f53\u524d\u7ea7\u6d41\u6c34\u7ebf\u7684\u6307\u4ee4\u53ef\u80fd\u4f1a\u963b\u6b62\u4e0b\u4e00\u6761\u8fde\u7eed\u6307\u4ee4\u5728\u6d41\u6c34\u7ebf\u4e2d\u9884\u671f\u7684\u65f6\u949f\u5468\u671f\u5185\u6267\u884c\uff0c\u8fd9\u6837\u7684\u60c5\u51b5\u88ab\u79f0\u4e3a\u6d41\u6c34\u7ebf\u5192\u9669 (<br \/>\n   <code><br \/>\n    Pipeline Hazards<br \/>\n   <\/code><br \/>\n   )\u3002\u5f53\u53d1\u751f\u6d41\u6c34\u7ebf\u5192\u9669\u540e\u5c06\u4f1a\u964d\u4f4e\u6d41\u6c34\u5316\u6240\u5e26\u6765\u7684\u7406\u60f3\u52a0\u901f\u6bd4\u3002\u5171\u6709\u4ee5\u4e0b\u4e09\u7c7b\u5192\u9669\u3002<br \/>\n   <br \/>\n   <code><br \/>\n    [\u6ce8]\uff1a\u6d41\u6c34\u5316\u52a0\u901f\u6bd4 = \u975e\u6d41\u6c34\u5316\u6307\u4ee4\u5e73\u5747\u6267\u884c\u65f6\u95f4 \/ \u6d41\u6c34\u5316\u6307\u4ee4\u5e73\u5747\u6267\u884c\u65f6\u95f4<br \/>\n   <\/code>\n  <\/p>\n<p>\n   <strong><br \/>\n    (1) \u7ed3\u6784\u5192\u9669 (<br \/>\n    <code><br \/>\n     Structural Hazards<br \/>\n    <\/code><br \/>\n    )<br \/>\n   <\/strong><br \/>\n   \uff0c\u5f53\u5904\u7406\u5668\u4ee5\u6d41\u6c34\u7ebf\u65b9\u5f0f\u5de5\u4f5c\u65f6\uff0c\u6307\u4ee4\u4f1a\u91cd\u53e0\u6267\u884c\uff0c\u5982\u679c\u786c\u4ef6\u65e0\u6cd5\u540c\u65f6\u652f\u6301\u6307\u4ee4\u7684\u6240\u6709\u7ec4\u5408\u65b9\u5f0f\uff0c\u5c31\u4f1a\u51fa\u73b0\u8d44\u6e90\u51b2\u7a81\uff0c\u4ece\u800c\u5bfc\u81f4\u7ed3\u6784\u5192\u9669\u3002\u5373\u5f53\u524d\u6307\u4ee4\u6240\u9700\u7684\u786c\u4ef6\u6b63\u5728\u4e3a\u4e4b\u524d\u7684\u6307\u4ee4\u5de5\u4f5c\uff1b<br \/>\n   <br \/>\n   <strong><br \/>\n    (2) \u6570\u636e\u5192\u9669 (<br \/>\n    <code><br \/>\n     Data Hazards<br \/>\n    <\/code><br \/>\n    )<br \/>\n   <\/strong><br \/>\n   \uff0c\u5f53\u5904\u7406\u5668\u4ee5\u6d41\u6c34\u7ebf\u65b9\u5f0f\u5de5\u4f5c\u65f6\uff0c\u6307\u4ee4\u4f1a\u91cd\u53e0\u6267\u884c\uff0c\u82e5\u524d\u540e\u6307\u4ee4\u5b58\u5728\u4f9d\u8d56\u5173\u7cfb\uff0c\u5c31\u53ef\u80fd\u5bfc\u81f4\u6570\u636e\u5192\u9669\uff1b\uff08\u5982\uff0c\u5f53\u524d\u8fdb\u5165\u6d41\u6c34\u7ebf\u7684\u6307\u4ee4\u9700\u8981\u7528\u5230\u4e0a\u4e00\u6761\u6307\u4ee4\u6267\u884c\u7ed3\u675f\u540e\u7684\u7ed3\u679c\u4f5c\u8ba1\u7b97\uff0c\u6b64\u65f6\u5219\u53d1\u751f\u6570\u636e\u5192\u9669\uff09<br \/>\n   <br \/>\n   <strong><br \/>\n    (3) \u63a7\u5236\u5192\u9669 (<br \/>\n    <code><br \/>\n     Control Hazards<br \/>\n    <\/code><br \/>\n    )<br \/>\n   <\/strong><br \/>\n   \uff0c\u5206\u652f\u6307\u4ee4\u4ee5\u53ca\u5176\u5b83\u6539\u53d8\u7a0b\u5e8f\u8ba1\u6570\u5668\u7684\u6307\u4ee4\u5b9e\u73b0\u6d41\u6c34\u5316\u65f6\u53ef\u80fd\u5bfc\u81f4\u63a7\u5236\u5192\u9669\uff0c\u4e5f\u5c31\u662f\u9700\u8981\u6839\u636e\u4e4b\u524d\u6307\u4ee4\u7684\u6267\u884c\u7ed3\u679c\u51b3\u5b9a\u4e0b\u4e00\u6b65\u7684\u884c\u4e3a\u3002\n  <\/p>\n<p>\n   \u672c\u6587\u5148\u4ed4\u7ec6\u7814\u7a76\u4e00\u4e0b\u63a7\u5236\u5192\u9669\uff0c\u5176\u5b83\u5192\u9669\u7c7b\u578b\u5c06\u5728\u540e\u7eed\u6587\u7ae0\u4e2d\u7814\u7a76\uff0c\u5728\u6b64\u4e4b\u524d\u9996\u5148\u6765\u56de\u987e\u4ee5\u4e0b\u4e00\u4e9b\u4f60\u719f\u6089\u7684\u4e1c\u897f\u3002\n  <\/p>\n<h2>\n   <a id=\"2__BranchesJumps_11\"><br \/>\n   <\/a><br \/>\n   2. \u5206\u652f\u3001\u8df3\u8f6c\u6307\u4ee4 (Branches\u3001Jumps)<br \/>\n  <\/h2>\n<p>\n   \u4f60\u5e94\u8be5\u5df2\u7ecf\u53d1\u73b0\u4e86\u5206\u652f\u6307\u4ee4\u548c\u8df3\u8f6c\u6307\u4ee4\u4e0e\u5176\u5b83\u5e38\u89c4\u6307\u4ee4\u6216\u8005\u7b97\u672f\u903b\u8f91\u6307\u4ee4\u6709\u4e9b\u4e0d\u540c\u3002\u8fd9\u4e24\u7c7b\u6307\u4ee4\u7684\u6267\u884c\u90fd\u4f1a\u5f71\u54cd\u5230\u7a0b\u5e8f\u8ba1\u6570\u5668 (<br \/>\n   <code><br \/>\n    PC-Program Counter<br \/>\n   <\/code><br \/>\n   ) \u7684\u503c\u3002\n  <\/p>\n<p>\n   \u5206\u652f\u6307\u4ee4\u6539\u53d8<br \/>\n   <code><br \/>\n    PC<br \/>\n   <\/code><br \/>\n   \u662f\u6839\u636e\u5f53\u524d<br \/>\n   <code><br \/>\n    PC<br \/>\n   <\/code><br \/>\n   \u7684\u503c\u52a0\u4e0a\u504f\u79fb\u5f97\u5230\u76ee\u6807\u503c\u2014\u2014\u76f8\u5bf9\u5bfb\u5740\u6307\u4ee4\u3002\n  <\/p>\n<p>\n   \u8df3\u8f6c\u6307\u4ee4\uff08\u65e0\u6761\u4ef6\u8df3\u8f6c\uff09\u6539\u53d8<br \/>\n   <code><br \/>\n    PC<br \/>\n   <\/code><br \/>\n   \u65e0\u9700\u5173\u5fc3\u5f53\u524d<br \/>\n   <code><br \/>\n    PC<br \/>\n   <\/code><br \/>\n   \u503c\uff0c\u800c\u76f4\u63a5\u6539\u53d8<br \/>\n   <code><br \/>\n    PC<br \/>\n   <\/code><br \/>\n   \u5bc4\u5b58\u5668\u2014\u2014\u201c\u7edd\u5bf9\u5bfb\u5740\u6307\u4ee4\u201d\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\u8fd9\u91cc\u52a0\u4e0a\u4e86\u53cc\u5f15\u53f7\uff0c\u8df3\u8f6c\u6307\u4ee4\u672c\u610f\u4e3a\u8df3\u8f6c\u5230\u4e00\u4e2a\u7edd\u5bf9\u5730\u5740\uff0c\u4f46\u4e8b\u5b9e\u4e0a\u5728\u6307\u4ee4\u957f\u5ea6\u56fa\u5b9a\u4e14\u4e0e\u5730\u5740\u957f\u5ea6\u76f8\u540c\u7684\u60c5\u51b5\u4e0b\uff0c\u6ca1\u6709\u4e00\u6761\u6307\u4ee4\u53ef\u4ee5\u540c\u65f6\u5bb9\u4e0b\u64cd\u4f5c\u7801\u548c\u8df3\u8f6c\u7684\u7edd\u5bf9\u5730\u5740\uff0c\u56e0\u6b64\u8df3\u8f6c\u6307\u4ee4\u4e5f\u4e3a\u5f53\u524d<br \/>\n   <code><br \/>\n    PC<br \/>\n   <\/code><br \/>\n   \u503c\u52a0\u4e0a\u504f\u79fb\u91cf\u5b9e\u73b0\u7684\u3002\n  <\/p>\n<ul>\n<li>\n    <strong><br \/>\n     \u65e0\u6761\u4ef6\u8df3\u8f6c (Jumps)<br \/>\n    <\/strong><br \/>\n    <br \/>\n    <strong><br \/>\n     \u6307\u4ee4\u9700\u8981\u5173\u5fc3\u7684\u70b9\uff1a\u64cd\u4f5c\u7801 (<br \/>\n     <code><br \/>\n      Opcode<br \/>\n     <\/code><br \/>\n     )\uff0c\u504f\u79fb\u91cf (<br \/>\n     <code><br \/>\n      Offset<br \/>\n     <\/code><br \/>\n     )\uff0c\u7a0b\u5e8f\u8ba1\u6570\u5668 (<br \/>\n     <code><br \/>\n      PC<br \/>\n     <\/code><br \/>\n     )<br \/>\n    <\/strong>\n   <\/li>\n<\/ul>\n<p>\n   \u4f8b\u5982\uff0c<br \/>\n   <code><br \/>\n    MIPS<br \/>\n   <\/code><br \/>\n   \u4e2d\u7684<br \/>\n   <code><br \/>\n    J<br \/>\n   <\/code><br \/>\n   \u6307\u4ee4\u8df3\u8f6c\u5230\u7684\u5730\u5740\u5e76\u4e0d\u662f\u76f4\u63a5\u6307\u5b9a<br \/>\n   <code><br \/>\n    32<br \/>\n   <\/code><br \/>\n   \u4f4d\u7684\u5730\u5740\uff08\u6240\u6709<br \/>\n   <code><br \/>\n    MIPS<br \/>\n   <\/code><br \/>\n   \u6307\u4ee4\u90fd\u662f<br \/>\n   <code><br \/>\n    32<br \/>\n   <\/code><br \/>\n   \u4f4d\u957f\uff0c\u4e0d\u53ef\u80fd\u5168\u90e8\u7528\u4e8e\u7f16\u5740\u6570\u636e\u57df\uff0c\u90a3\u6837\u7684\u6307\u4ee4\u662f\u65e0\u6548\u7684\uff0c\u4e5f\u8bb8\u53ea\u6709<br \/>\n   <code><br \/>\n    nop<br \/>\n   <\/code><br \/>\n   \uff09\uff1a\u7531\u4e8e\u76ee\u7684\u5730\u5740\u7684\u6700\u9ad8<br \/>\n   <code><br \/>\n    4<br \/>\n   <\/code><br \/>\n   \u4f4d\u65e0\u6cd5\u5728\u6307\u4ee4\u7684\u7f16\u7801\u4e2d\u7ed9\u51fa\uff0c<br \/>\n   <code><br \/>\n    32<br \/>\n   <\/code><br \/>\n   \u4f4d\u5730\u5740\u7684\u6700\u9ad8<br \/>\n   <code><br \/>\n    4<br \/>\n   <\/code><br \/>\n   \u4f4d\u53d6\u503c\u5f53\u524d<br \/>\n   <code><br \/>\n    PC<br \/>\n   <\/code><br \/>\n   \u7684\u6700\u9ad8<br \/>\n   <code><br \/>\n    4<br \/>\n   <\/code><br \/>\n   \u4f4d\u3002\u5bf9\u4e8e\u4e00\u822c\u7684\u7a0b\u5e8f\u800c\u8a00\uff0c<br \/>\n   <code><br \/>\n    28<br \/>\n   <\/code><br \/>\n   \u4f4d\u5730\u5740\u6240\u652f\u6301\u7684<br \/>\n   <code><br \/>\n    256MB<br \/>\n   <\/code><br \/>\n   \u8df3\u8f6c\u7a7a\u95f4\u5df2\u7ecf\u8db3\u591f\u5927\u4e86\u3002\n  <\/p>\n<p>\n   \u518d\u5982<br \/>\n   <code><br \/>\n    RISC-V<br \/>\n   <\/code><br \/>\n   \u67b6\u6784 (<br \/>\n   <code><br \/>\n    RV32<br \/>\n   <\/code><br \/>\n   ) \u4e2d\u7684<br \/>\n   <code><br \/>\n    JAR<br \/>\n   <\/code><br \/>\n   \u6307\u4ee4\u8fd0\u7528\u5230<br \/>\n   <code><br \/>\n    J<br \/>\n   <\/code><br \/>\n   \u683c\u5f0f\u7684\u7acb\u5373\u6570\u7f16\u7801\u65b9\u5f0f\uff0c\u7b26\u53f7\u4f4d\u6269\u5c55\u4e4b\u540e<br \/>\n   <code><br \/>\n    2<br \/>\n   <\/code><br \/>\n   \u7684\u6574\u6570\u500d\u7684\u504f\u79fb\u91cf\u52a0\u4e0a<br \/>\n   <code><br \/>\n    PC<br \/>\n   <\/code><br \/>\n   \u503c\u4f5c\u4e3a\u8df3\u8f6c\u76ee\u6807\u5730\u5740\uff0c\u56e0\u6b64\u53ef\u4ee5\u63a7\u5236\u6307\u4ee4\u8df3\u8f6c\u5230\u5f53\u524d\u4f4d\u7f6e\u524d\u540e<br \/>\n   <code><br \/>\n    1 MiB<br \/>\n   <\/code><br \/>\n   \u7684\u8303\u56f4\u5185\u3002<br \/>\n   <code><br \/>\n    JAL<br \/>\n   <\/code><br \/>\n   \u6307\u4ee4\u5c06\uff08<br \/>\n   <code><br \/>\n    PC + 4<br \/>\n   <\/code><br \/>\n   \uff09\u5b58\u653e\u5728\u76ee\u7684\u5bc4\u5b58\u5668<br \/>\n   <code><br \/>\n    rd<br \/>\n   <\/code><br \/>\n   \u4e2d\u3002\u6807\u51c6\u7684\u8f6f\u4ef6\u4e2d\u7cfb\u7edf\u8c03\u7528\u7ea6\u5b9a\u7528\u5bc4\u5b58\u5668<br \/>\n   <code><br \/>\n    x1<br \/>\n   <\/code><br \/>\n   \u4f5c\u4e3a\u8fd4\u56de\u5730\u5740\u5bc4\u5b58\u5668\u3002\n  <\/p>\n<p>\n   \u5f53<br \/>\n   <code><br \/>\n    JAL<br \/>\n   <\/code><br \/>\n   \u7684<br \/>\n   <code><br \/>\n    rd = x0<br \/>\n   <\/code><br \/>\n   \u7684\u65f6\u5019\uff0c\u5373\u4e3a\u7b80\u5355\u7684<br \/>\n   <code><br \/>\n    Jump<br \/>\n   <\/code><br \/>\n   \u6307\u4ee4\uff08\u6c47\u7f16\u7a0b\u5e8f\u4e2d\u7684\u4f2a\u6307\u4ee4<br \/>\n   <code><br \/>\n    J<br \/>\n   <\/code><br \/>\n   \uff09\u3002<br \/>\n   \n  <\/p>\n<ul>\n<li>\n    <strong><br \/>\n     \u5bc4\u5b58\u5668\u8df3\u8f6c (Jump Register)<br \/>\n    <\/strong><br \/>\n    <br \/>\n    <strong><br \/>\n     \u6307\u4ee4\u9700\u8981\u5173\u5fc3\u7684\u70b9\uff1a\u64cd\u4f5c\u7801 (<br \/>\n     <code><br \/>\n      Opcode<br \/>\n     <\/code><br \/>\n     )\uff0c\u5bc4\u5b58\u5668\u503c<br \/>\n    <\/strong>\n   <\/li>\n<\/ul>\n<p>\n   \u5f53\u8ba1\u7b97\u673a\u53d6\u6307 (<br \/>\n   <code><br \/>\n    IF<br \/>\n   <\/code><br \/>\n   ) \u5230\u4e00\u4e2a\u5bc4\u5b58\u5668\u8df3\u8f6c\u6307\u4ee4\uff0c\u5728<br \/>\n   <code><br \/>\n    ID<br \/>\n   <\/code><br \/>\n   \u9636\u6bb5\u8bd1\u7801\u5668\u901a\u8fc7\u8be5\u6761\u6307\u4ee4\u7684\u64cd\u4f5c\u7801<br \/>\n   <code><br \/>\n    Opcode<br \/>\n   <\/code><br \/>\n   \u786e\u5b9a\u5f53\u524d\u6307\u4ee4\u662f\u4e00\u6761\u5bc4\u5b58\u5668\u8df3\u8f6c\u6307\u4ee4\uff0c\u4f46\u8fd9\u65f6\u5019\u5e76\u4e0d\u77e5\u9053\u8981\u8df3\u8f6c\u7684\u5730\u5740\u53ea\u77e5\u9053\u4fdd\u5b58\u8df3\u8f6c\u5730\u5740\u7684\u5bc4\u5b58\u5668\uff0c\u4e4b\u540e\u518d\u4ece\u8be5\u5bc4\u5b58\u5668\u4e2d\u83b7\u53d6\u8df3\u8f6c\u5730\u5740\u3002\u8fd9\u91cc\u6ca1\u6709\u4efb\u4f55\u504f\u79fb\uff0c\u800c\u662f\u76f4\u63a5\u8df3\u8f6c\u5230\u8df3\u8f6c\u5bc4\u5b58\u5668\u4fdd\u5b58\u7684\u5730\u5740\u3002\n  <\/p>\n<ul>\n<li>\n    <strong><br \/>\n     \u6761\u4ef6\u5206\u652f\u8df3\u8f6c (Conditional Branches)<br \/>\n    <\/strong><br \/>\n    <br \/>\n    <strong><br \/>\n     \u6307\u4ee4\u9700\u8981\u5173\u5fc3\u7684\u70b9\uff1a\u64cd\u4f5c\u7801 (<br \/>\n     <code><br \/>\n      Opcode<br \/>\n     <\/code><br \/>\n     )\uff0c\u7a0b\u5e8f\u8ba1\u6570\u5668 (<br \/>\n     <code><br \/>\n      PC<br \/>\n     <\/code><br \/>\n     )\uff0c\u5bc4\u5b58\u5668\u503c (\u7528\u4e8e\u5224\u65ad\u6761\u4ef6)\uff0c\u504f\u79fb\u91cf (<br \/>\n     <code><br \/>\n      Offset<br \/>\n     <\/code><br \/>\n     )<br \/>\n    <\/strong>\n   <\/li>\n<\/ul>\n<p>\n   \u8fd9\u5c31\u53d8\u5f97\u6709\u70b9\u590d\u6742\u4e86\uff0c\u5f53\u8ba1\u7b97\u673a\u53d6\u6307 (<br \/>\n   <code><br \/>\n    IF<br \/>\n   <\/code><br \/>\n   ) \u5230\u4e00\u4e2a\u6761\u4ef6\u8df3\u8f6c\u6307\u4ee4\uff0c\u5728<br \/>\n   <code><br \/>\n    ID<br \/>\n   <\/code><br \/>\n   \u9636\u6bb5\u8bd1\u7801\u5668\u901a\u8fc7\u8be5\u6761\u6307\u4ee4\u7684\u64cd\u4f5c\u7801<br \/>\n   <code><br \/>\n    Opcode<br \/>\n   <\/code><br \/>\n   \u786e\u5b9a\u5f53\u524d\u6307\u4ee4\u662f\u4e00\u6761\u6761\u4ef6\u8df3\u8f6c\u6307\u4ee4\uff0c\u7136\u540e\u9700\u8981\u83b7\u53d6<br \/>\n   <code><br \/>\n    PC<br \/>\n   <\/code><br \/>\n   \u503c\u548c\u67e5\u770b\u5bf9\u5e94\u7684\u5bc4\u5b58\u5668\uff0c\u901a\u8fc7\u5bc4\u5b58\u5668\u7684\u503c\u5f97\u5230\u6761\u4ef6\u7ed3\u679c\uff08\u5982\uff0c\u7528\u5bc4\u5b58\u5668\u7684\u503c\u4e0e<br \/>\n   <code><br \/>\n    0<br \/>\n   <\/code><br \/>\n   \u6bd4\u8f83\uff0c\u67e5\u770b\u662f\u5426\u5927\u4e8e\u6216\u5c0f\u4e8e\uff09\uff0c\u518d\u901a\u8fc7\u6307\u4ee4\u7ed9\u7684\u504f\u79fb\u91cf\u52a0\u4e0a\u7a0b\u5e8f\u8ba1\u6570\u5668<br \/>\n   <code><br \/>\n    PC<br \/>\n   <\/code><br \/>\n   \u503c\u5f97\u5230\u8df3\u8f6c\u5730\u5740\u5b8c\u6210\u4e00\u4e2a\u548c<br \/>\n   <code><br \/>\n    PC<br \/>\n   <\/code><br \/>\n   \u76f8\u5173\u7684\u5206\u652f\u3002\n  <\/p>\n<h2>\n   <a id=\"3__Control_Hazards_42\"><br \/>\n   <\/a><br \/>\n   3. \u63a7\u5236\u5192\u9669 (Control Hazards)<br \/>\n  <\/h2>\n<h3>\n   <a id=\"31__43\"><br \/>\n   <\/a><br \/>\n   3.1. \u8df3\u8f6c\u6307\u4ee4\u5e26\u6765\u7684\u6d41\u6c34\u7ebf\u63a7\u5236\u5192\u9669<br \/>\n  <\/h3>\n<p>\n   \u9996\u5148\u6765\u4e86\u89e3\u4e0b\u57fa\u672c\u7684\u63a7\u5236\u5192\u9669\uff0c\u6700\u57fa\u672c\u7684\u63a7\u5236\u5192\u9669\u662f\u5982\u4f55\u4fdd\u8bc1\u4e0b\u4e00\u6761\u6307\u4ee4\u7684\u6b63\u786e\u6267\u884c\uff0c\u6765\u770b\u4e0b\u9762\u8fd9\u4e2a\u6d41\u6c34\u7ebf\u56fe\u3002\n  <\/p>\n<\/p>\n<p>\n   \u6307\u4ee4<br \/>\n   <code><br \/>\n    1<br \/>\n   <\/code><br \/>\n   \u4f1a\u6309\u6b63\u5e38\u7684\u4e94\u7ea7\u6d41\u6c34\u7ebf\u6267\u884c\u987a\u5e8f\u6267\u884c\uff0c\u53d6\u6307<br \/>\n   <code><br \/>\n    IF<br \/>\n   <\/code><br \/>\n   \u3001\u8bd1\u7801<br \/>\n   <code><br \/>\n    ID<br \/>\n   <\/code><br \/>\n   \u3001\u6267\u884c<br \/>\n   <code><br \/>\n    EX<br \/>\n   <\/code><br \/>\n   \u3001\u5b58\u50a8<br \/>\n   <code><br \/>\n    MEM<br \/>\n   <\/code><br \/>\n   \u3001\u5199\u56de<br \/>\n   <code><br \/>\n    WB<br \/>\n   <\/code><br \/>\n   \u3002\u53ef\u80fd\u4f60\u53d1\u73b0\u4e86\u7b2c\u4e8c\u6761\u6307\u4ee4\u8fd9\u91cc\u7684\u6267\u884c\u4f3c\u4e4e\u6709\u70b9\u4e0d\u540c\uff0c\u5f53\u7b2c\u4e8c\u6761\u6307\u4ee4\u6307\u4ee4\u8fdb\u5165\u6d41\u6c34\u7ebf\u4e2d\uff0c\u7b2c\u4e00\u6761\u6307\u4ee4\u624d\u521a\u521a\u5b8c\u6210\u53d6\u6307\u9636\u6bb5\uff0c<br \/>\n   <strong><br \/>\n    \u8fd9\u4e2a\u65f6\u5019\u5c31\u4f1a\u4ea7\u751f\u4e00\u4e2a\u95ee\u9898\uff1a\u201c\u7b2c\u4e8c\u6761\u6307\u4ee4\u5230\u5e95\u662f\u5426\u662f\u6211\u4eec\u9700\u8981\u6267\u884c\u7684\u6307\u4ee4\u5462\uff1f\u201d<br \/>\n   <\/strong><br \/>\n   \uff0c\u4ea7\u751f\u8fd9\u4e2a\u95ee\u9898\u7684\u539f\u56e0\u662f\u7b2c\u4e00\u6761\u6307\u4ee4\u5e76\u6ca1\u6709\u88ab\u8bd1\u7801\uff0c\u56e0\u6b64\u8fd9\u65f6\u5e76\u4e0d\u6e05\u695a\u7b2c\u4e00\u6761\u6307\u4ee4\u5230\u5e95\u662f\u4e0d\u662f\u5206\u652f\u6216\u8df3\u8f6c\u6307\u4ee4\u3002\u6240\u4ee5\u8fd9\u65f6\u5019\u6309\u987a\u5e8f\u6d41\u8fdb\u6d41\u6c34\u7ebf\u7684\u6307\u4ee4<br \/>\n   <code><br \/>\n    2<br \/>\n   <\/code><br \/>\n   \u4e0d\u4e00\u5b9a\u662f\u7a0b\u5e8f\u9700\u8981\u6267\u884c\u7684\u6307\u4ee4\u3002\u76f4\u5230\u7b2c\u4e00\u4e2a\u6307\u4ee4\u5728<br \/>\n   <code><br \/>\n    ID<br \/>\n   <\/code><br \/>\n   \u9636\u6bb5\u88ab\u8bd1\u7801\u5668\u89e3\u7801\u540e\uff0c\u8fd9\u65f6\u5019\u6211\u4eec\u4e86\u89e3\u5230\uff0c\u201c\u54e6~ \u4e0a\u4e00\u6761\u6307\u4ee4\u4e0d\u662f\u5206\u652f\u6216\u8df3\u8f6c\u6307\u4ee4\uff0c\u6216\u8005\u7684\u786e\u662f\u4e00\u6761\u5206\u652f\u6216\u8df3\u8f6c\u6307\u4ee4\u201d\u3002\n  <\/p>\n<p>\n   \u90a3\u4e48\u5982\u679c\u6307\u4ee4<br \/>\n   <code><br \/>\n    1<br \/>\n   <\/code><br \/>\n   \u662f\u4e00\u6761\u5206\u652f\u6216\u8df3\u8f6c\u6307\u4ee4\u5462\uff1f\u90a3\u4e48\u5728\u8bd1\u7801\u9636\u6bb5\u5c31\u4f1a\u786e\u5b9a\u6307\u4ee4<br \/>\n   <code><br \/>\n    1<br \/>\n   <\/code><br \/>\n   \u662f\u8fd9\u6837\u7684\u6307\u4ee4\uff0c\u56e0\u6b64\u5728\u6307\u4ee4<br \/>\n   <code><br \/>\n    1<br \/>\n   <\/code><br \/>\n   \u7684<br \/>\n   <code><br \/>\n    ID<br \/>\n   <\/code><br \/>\n   \u9636\u6bb5\u65f6\u949f\u5468\u671f\u5c06\u4f1a\u6539\u53d8\u7a0b\u5e8f\u8ba1\u6570\u5668<br \/>\n   <code><br \/>\n    PC<br \/>\n   <\/code><br \/>\n   \u548c\u6539\u53d8\u6307\u4ee4\u5bc4\u5b58\u5668\u4e2d\u8981\u88ab\u8bfb\u53d6\u7684\u6307\u4ee4\u5730\u5740\u3002\u8fd9\u6837\u5c31\u4f1a\u4ea7\u751f\u63a7\u5236\u5192\u9669\uff0c\u4e3a\u4e86\u907f\u514d\u5192\u9669\u6211\u4eec\u4f1a\u5728<br \/>\n   <code><br \/>\n    ID<br \/>\n   <\/code><br \/>\n   \u8fd9\u4e2a\u9636\u6bb5\u63d2\u5165\u4e00\u4e2a\u6c14\u6ce1 (<br \/>\n   <code><br \/>\n    Bubble<br \/>\n   <\/code><br \/>\n   )\uff0c\u8ba9\u4e0b\u4e00\u6761\u6307\u4ee4\u7684\u53d6\u503c\u9636\u6bb5\u5ef6\u8fdf\u4e00\u4e2a\u5468\u671f\uff0c\u5982\u679c\u7ee7\u7eed\u8fd9\u6837\u4e0b\u53bb\uff0c\u5c31\u4f1a\u53d8\u6210\u4e0b\u9762\u8fd9\u6837\u3002<br \/>\n   <br \/>\n   <code><br \/>\n    [\u6ce8]\uff1a\u4e3a\u907f\u514d\u8fd9\u7c7b\u5192\u9669\uff0c\u5e38\u5e38\u4f1a\u4f7f\u6d41\u6c34\u7ebf\u63d2\u5165\u4e00\u4e2a\u7a7a\u64cd\u4f5c nop\u3002\u8fd9\u6837\u7684\u7a7a\u64cd\u4f5c\u901a\u5e38\u88ab\u79f0\u4e3a\u6d41\u6c34\u7ebf\u6c14\u6ce1\u6216\u76f4\u63a5\u79f0\u4e3a\u6c14\u6ce1 (Pipeline Bubble\/Bubble)\u3002<br \/>\n   <\/code>\n  <\/p>\n<\/p>\n<p>\n   \u6bcf\u6761\u6307\u4ee4\u6d41\u5165\u6d41\u6c34\u7ebf\u90fd\u4f1a\u8981\u8003\u8651\u63a7\u5236\u5192\u9669\uff0c\u90a3\u4e48\u8981\u907f\u514d\u5192\u9669\u5c31\u8981\u7ed9\u6bcf\u4e2a<br \/>\n   <code><br \/>\n    ID<br \/>\n   <\/code><br \/>\n   \u9636\u6bb5\u63d2\u5165\u4e00\u4e2a<br \/>\n   <code><br \/>\n    Bubble<br \/>\n   <\/code><br \/>\n   \uff0c\u90a3\u4e48\u6bcf\u6761\u6307\u4ee4\u7684\u53d6\u503c\u90fd\u9700\u8981\u4e24\u4e2a\u65f6\u949f\u5468\u671f\uff0c\u4f60\u4f1a\u610f\u8bc6\u5230\u8fd9\u5c06\u4f1a\u662f\u975e\u5e38\u4f4e\u6548\u7684\u6d41\u6c34\u7ebf\u3002\u73b0\u5728\u6211\u4eec\u5177\u4f53\u7684\u5206\u6790\u8fd9\u6837\u7684\u6d41\u6c34\u7ebf\uff0c\u8ba9\u6211\u4eec\u6362\u4e00\u79cd\u6d41\u6c34\u7ebf\u753b\u6cd5\uff08\u5750\u6807\u6539\u53d8\uff09\u518d\u6765\u770b\u770b\u3002\n  <\/p>\n<\/p>\n<p>\n   \u8fd9\u6837\u5c31\u4f1a\u5f88\u6e05\u695a\u7684\u770b\u5230\uff0c\u8fd9\u6761\u6d41\u6c34\u7ebf\u6267\u884c\u7684\u987a\u5e8f\u662f<br \/>\n   <code><br \/>\n    I1<br \/>\n   <\/code><br \/>\n   \u3001<br \/>\n   <code><br \/>\n    nop<br \/>\n   <\/code><br \/>\n   \u3001<br \/>\n   <code><br \/>\n    I2<br \/>\n   <\/code><br \/>\n   \u3001<br \/>\n   <code><br \/>\n    nop<br \/>\n   <\/code><br \/>\n   \u3001<br \/>\n   <code><br \/>\n    I3<br \/>\n   <\/code><br \/>\n   \u3001<br \/>\n   <code><br \/>\n    nop<br \/>\n   <\/code><br \/>\n   \u3001<br \/>\n   <code><br \/>\n    I4<br \/>\n   <\/code><br \/>\n   \u2026\u6309\u7167\u8fd9\u4e2a\u6d41\u6c34\u7ebf\u8ba1\u7b97\u5b83\u7684<br \/>\n   <code><br \/>\n    CPI = 2 (1 + 1)<br \/>\n   <\/code><br \/>\n   \uff0c\u7406\u60f3<br \/>\n   <code><br \/>\n    CPI = 1<br \/>\n   <\/code><br \/>\n   \uff0c\u6309\u7167\u8fd9\u6837\u8bbe\u8ba1\u7684\u673a\u5668\u6267\u884c\u7a0b\u5e8f\u7684\u6027\u80fd\u4e25\u683c\u51cf\u534a\u3002<br \/>\n   <br \/>\n   <code><br \/>\n    [\u6ce8]\uff1a<br \/>\n   <\/code><br \/>\n   <br \/>\n   <code><br \/>\n    \u975e\u6d41\u6c34\u5316 CPI = \u6307\u4ee4\u6267\u884c\u5468\u671f \/ \u6267\u884c\u6307\u4ee4\u4e2a\u6570\uff1b<br \/>\n   <\/code><br \/>\n   <br \/>\n   <code><br \/>\n    \u6d41\u6c34\u5316 CPI = \u7406\u60f3 CPI + \u6bcf\u6761\u6307\u4ee4\u7684\u6d41\u6c34\u7ebf\u505c\u987f\u65f6\u949f\u5468\u671f\uff1b\uff08\u7406\u60f3 CPI = 1\uff09<br \/>\n   <\/code>\n  <\/p>\n<h3>\n   <a id=\"32__66\"><br \/>\n   <\/a><br \/>\n   3.2. \u89e3\u51b3\u8df3\u8f6c\u6307\u4ee4\u5e26\u6765\u7684\u63a7\u5236\u5192\u9669\uff08\u57fa\u672c\u65b9\u6cd5\uff09<br \/>\n  <\/h3>\n<p>\n   \u73b0\u5728\u5df2\u7ecf\u6e05\u695a\u4e86\u5728\u6d41\u6c34\u7ebf\u4e2d\u4f1a\u56e0\u4e3a\u5b58\u5728\u8df3\u8f6c\u6307\u4ee4\u7684\u539f\u56e0\uff0c\u800c\u4e3a\u6d41\u6c34\u7ebf\u5e26\u6765\u63a7\u5236\u5192\u9669\uff0c\u90a3\u4e48\u5982\u4f55\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u5462\uff1f\u5176\u5b9e\u8bf4\u6765\u65b9\u6cd5\u4e5f\u7b80\u5355\uff0c\u90a3\u5c31\u662f\u731c\u6d4b (<br \/>\n   <code><br \/>\n    Speculate<br \/>\n   <\/code><br \/>\n   ) \u4e0b\u4e00\u6761\u6307\u4ee4\u4e0d\u662f\u8df3\u8f6c\u6307\u4ee4\uff0c\u56e0\u6b64\u76f4\u63a5\u5c06<br \/>\n   <code><br \/>\n    PC<br \/>\n   <\/code><br \/>\n   \u7684\u503c\u52a0<br \/>\n   <code><br \/>\n    4<br \/>\n   <\/code><br \/>\n   \uff08\u82e5\u6307\u4ee4\u957f\u5ea6\u662f<br \/>\n   <code><br \/>\n    4<br \/>\n   <\/code><br \/>\n   \u5b57\u8282\uff09\u3002<br \/>\n   \n  <\/p>\n<p>\n   \u4f46\u5b9e\u9645\u4e0a\u6765\u770b\u8fd9\u6bb5\u6307\u4ee4\u4ee3\u7801\uff0c<br \/>\n   <code><br \/>\n    100<br \/>\n   <\/code><br \/>\n   \u5730\u5740\u7684\u6307\u4ee4\u662f\u4e00\u6761\u8df3\u8f6c\u6307\u4ee4\uff0c\u5f53<br \/>\n   <code><br \/>\n    100<br \/>\n   <\/code><br \/>\n   \u5730\u5740\u7684\u6307\u4ee4\u88ab\u53d6\u503c\uff0c\u5230\u4e86<br \/>\n   <code><br \/>\n    ID<br \/>\n   <\/code><br \/>\n   \u8bd1\u7801\u9636\u6bb5\u53d1\u73b0<br \/>\n   <code><br \/>\n    100<br \/>\n   <\/code><br \/>\n   \u5730\u5740\u7684\u6307\u4ee4\u662f\u4e00\u6761\u8df3\u8f6c\u6307\u4ee4\uff0c\u4f46\u6b64\u65f6<br \/>\n   <code><br \/>\n    104<br \/>\n   <\/code><br \/>\n   \u5730\u5740\u7684\u6307\u4ee4\u5df2\u7ecf\u88ab\u53d6\u503c\uff08\u7531\u4e8e\u4e0a\u6b21\u731c\u6d4b\u8be5\u6307\u4ee4\u4e0d\u662f\u8df3\u8f6c\u6307\u4ee4\u56e0\u6b64\u4f1a\u987a\u5e8f\u53d6\u503c\uff09\u3002\u800c<br \/>\n   <code><br \/>\n    100<br \/>\n   <\/code><br \/>\n   \u5730\u5740\u7684\u6307\u4ee4\u544a\u8bc9\u6211\u4eec\u5e94\u8be5\u53bb<br \/>\n   <code><br \/>\n    304<br \/>\n   <\/code><br \/>\n   \u5730\u5740\u53d6\u503c\u6267\u884c\uff0c\u90a3\u4e48\u8fd9\u65f6\u5019\u5c31\u9700\u8981\u505a\u4e24\u4ef6\u4e8b\u60c5\uff0c\u7b2c\u4e00\uff0c\u8981\u963b\u6b62\u5df2\u7ecf\u88ab\u53d6\u503c\u4e86\u7684<br \/>\n   <code><br \/>\n    104<br \/>\n   <\/code><br \/>\n   \u5730\u5740\u6307\u4ee4\u7ee7\u7eed\u5728\u6d41\u6c34\u7ebf\u4e2d\u6267\u884c\uff08\u5373\u6740\u6b7b\u73b0\u5728\u7684\u6d41\u6c34\u7ebf\uff09\uff1b\u7b2c\u4e8c\uff0c\u6539\u53d8<br \/>\n   <code><br \/>\n    PC<br \/>\n   <\/code><br \/>\n   \u503c\u4e3a\u8981\u8df3\u8f6c\u5230\u7684\u5730\u5740\u3002\n  <\/p>\n<\/p>\n<p>\n   \u4e3a\u4e86\u5b8c\u6210\u4e0a\u8ff0\u7b2c\u4e00\u4e2a\u95ee\u9898\u6211\u4eec\u5728\u6d41\u6c34\u7ebf\u4e2d\u52a0\u5165\u4e00\u4e2a\u9009\u62e9\u5668<br \/>\n   <code><br \/>\n    IRSrc<br \/>\n   <\/code><br \/>\n   \uff0c\u5f53\u4e0a\u4e00\u6761\u6307\u4ee4\u5230\u8bd1\u7801\u9636\u6bb5\u88ab\u89e3\u8bd1\u4e3a\u8df3\u8f6c\u6307\u4ee4\u65f6\uff0c\u8be5\u9009\u62e9\u5668\u4fbf\u4f1a\u5207\u6362\u5230\u4e00\u6761\u7a7a\u6307\u4ee4<br \/>\n   <code><br \/>\n    nop<br \/>\n   <\/code><br \/>\n   \u3002\u5e76\u4e14\u5728\u5468\u671f\u7ed3\u675f\u65f6\u5229\u7528\u4e00\u4e2a\u989d\u5916\u7684\u52a0\u6cd5\u5668\u5c06\u6307\u4ee4\u7684\u4e00\u90e8\u5206\u548c\u73b0\u6709\u7684<br \/>\n   <code><br \/>\n    PC<br \/>\n   <\/code><br \/>\n   \u76f8\u52a0\u8ba1\u7b97\u5f97\u5230\u65b0\u7684\u8df3\u8f6c\u5730\u5740\u4ea4\u7ed9<br \/>\n   <code><br \/>\n    PC<br \/>\n   <\/code><br \/>\n   \uff0c\u4ece\u800c\u5b8c\u6210\u7b2c\u4e8c\u70b9\u3002\n  <\/p>\n<\/p>\n<h3>\n   <a id=\"33__82\"><br \/>\n   <\/a><br \/>\n   3.3. \u6761\u4ef6\u5206\u652f\u5e26\u6765\u7684\u6d41\u6c34\u7ebf\u63a7\u5236\u5192\u9669<br \/>\n  <\/h3>\n<pre><code class=\"prism language-trl\">I1            096      ADD\nI2            100      BEQZ   r1   +200\nI3            104      ADD\n              108      ...\nI4            304      ADD\n<\/code><\/pre>\n<p>\n   \u8fd9\u91cc\u6709\u4e00\u6bb5\u6307\u4ee4\u4ee3\u7801\uff0c<br \/>\n   <code><br \/>\n    100<br \/>\n   <\/code><br \/>\n   \u5730\u5740\u7684\u6307\u4ee4\u4f1a\u5224\u65ad<br \/>\n   <code><br \/>\n    r1<br \/>\n   <\/code><br \/>\n   \u5bc4\u5b58\u5668\u7684\u503c\u662f\u5426\u7b49\u4e8e<br \/>\n   <code><br \/>\n    0<br \/>\n   <\/code><br \/>\n   \u5982\u679c\u662f\u5219\u8df3\u8f6c\u5230\u4ee5<br \/>\n   <code><br \/>\n    200<br \/>\n   <\/code><br \/>\n   \u4e3a\u504f\u79fb\u7684\u5730\u5740\u3002\u4e8b\u5b9e\u4e0a\u4f60\u53d1\u73b0\u8fd9\u91cc\u5df2\u7ecf\u4ea7\u751f\u4e86\u4e00\u6761\u6d41\u6c34\u7ebf\u7684\u5206\u652f\uff0c\u90a3\u4e48\u5e26\u6765\u7684\u95ee\u9898\u5c31\u662f\n  <\/p>\n<ul>\n<li>\n    <strong><br \/>\n     1.<br \/>\n    <\/strong><br \/>\n    \u8981\u600e\u4e48\u6837\u77e5\u9053\u662f\u5426\u91c7\u7528\u8fd9\u6761\u5206\u652f\uff1b\n   <\/li>\n<li>\n    <strong><br \/>\n     2.<br \/>\n    <\/strong><br \/>\n    \u4ee5\u53ca\u91c7\u7528\u8fd9\u4e2a\u5206\u652f\u540e\u8981\u5982\u4f55\u53bb\u505a\u3002\n   <\/li>\n<\/ul>\n<h3>\n   <a id=\"34__96\"><br \/>\n   <\/a><br \/>\n   3.4. \u89e3\u51b3\u6761\u4ef6\u5206\u652f\u6307\u4ee4\u5e26\u6765\u7684\u6d41\u6c34\u7ebf\u7684\u63a7\u5236\u5192\u9669\uff08\u57fa\u672c\u65b9\u6cd5\uff09<br \/>\n  <\/h3>\n<p>\n   \u5148\u6765\u770b\u7b2c\u4e00\u4e2a\u95ee\u9898\uff0c\u5982\u4f55\u77e5\u9053\u662f\u5426\u91c7\u7528\u8fd9\u6761\u5206\u652f\uff0c\u662f\u5426\u8fd8\u80fd\u50cf\u8df3\u8f6c\u6307\u4ee4\u90a3\u6837\u76f4\u63a5\u5728\u8bd1\u7801\u9636\u6bb5\u5b8c\u6210\uff08\u5373\u6839\u636e\u8bd1\u7801\u7684\u6307\u4ee4\u7c7b\u578b\u5224\u65ad\uff09\uff0c\u8fd9\u6837\u7684\u65b9\u6cd5\u7528\u5728\u6761\u4ef6\u5206\u652f\u6307\u4ee4\u4f3c\u4e4e\u4e0d\u5408\u7406\uff0c\u56e0\u4e3a\u8fd9\u65f6\u5019\u53ea\u77e5\u9053\u662f\u6761\u4ef6\u5206\u652f\u6307\u4ee4\uff0c\u4f46\u5e76\u4e0d\u6e05\u695a\u6761\u4ef6\u662f\u5426\u6210\u7acb\u3002\u56e0\u6b64\u8fd9\u91cc\u9700\u8981\u7528\u4e00\u4e2a\u80fd\u591f\u505a\u6bd4\u8f83\u7684\u786c\u4ef6\u903b\u8f91\u5355\u5143\uff0c\u7c7b\u4f3c\u8fd9\u6837\u7684\u51cf\u6cd5\u8fd0\u7b97\u6216\u6bd4\u8f83\u64cd\u4f5c\u5f88\u9002\u5408\u7528<br \/>\n   <code><br \/>\n    ALU<br \/>\n   <\/code><br \/>\n   \u5b8c\u6210\uff0c\u7136\u540e\u518d\u5f15\u51fa\u4e00\u4e2a\u96f6\u7ebf (<br \/>\n   <code><br \/>\n    wire<br \/>\n   <\/code><br \/>\n   )\uff0c\u5982\u4e0b\u56fe\u3002\n  <\/p>\n<\/p>\n<p>\n   \u6839\u636e\u8fd9\u6837\u7684\u505a\u6cd5\uff0c\u5c06\u4f1a\u5728\u8bd1\u7801\u9636\u6bb5\u7684\u4e0b\u4e00\u4e2a\u5468\u671f\u7ed3\u675f\u540e\u624d\u80fd\u786e\u5b9a\u662f\u5426\u9009\u7528\u5206\u652f\uff08\u6839\u636e<br \/>\n   <code><br \/>\n    zero wire<br \/>\n   <\/code><br \/>\n   \u5224\u65ad\uff09\u3002<br \/>\n   <code><br \/>\n    PC<br \/>\n   <\/code><br \/>\n   \u7684\u9884\u6d4b\u65b9\u6848\u4f9d\u7136\u662f\u731c\u6d4b\u4e0d\u8df3\u8f6c\u7684\u65b9\u5f0f\uff0c\u90a3\u4e48<br \/>\n   <code><br \/>\n    IF<br \/>\n   <\/code><br \/>\n   \u9636\u6bb5\u4f1a\u5728<br \/>\n   <code><br \/>\n    I2<br \/>\n   <\/code><br \/>\n   \u7684<br \/>\n   <code><br \/>\n    ID<br \/>\n   <\/code><br \/>\n   \u9636\u6bb5\u53d6\u6307\u4e00\u6b21\u5730\u5740\u4e3a<br \/>\n   <code><br \/>\n    PC + 4 = 104<br \/>\n   <\/code><br \/>\n   \uff0c\u5f53\u8ba1\u7b97<br \/>\n   <code><br \/>\n    I2<br \/>\n   <\/code><br \/>\n   \u5206\u652f\u8fd9\u4e2a\u65f6\u949f\u5468\u671f\uff0c<br \/>\n   <code><br \/>\n    IF<br \/>\n   <\/code><br \/>\n   \u53c8\u4f1a\u53d6\u6307\u4e00\u6b21\u5730\u5740\u4e3a<br \/>\n   <code><br \/>\n    PC + 4 = 108<br \/>\n   <\/code><br \/>\n   \uff0c\u56e0\u6b64\u5f53\u80fd\u591f\u786e\u5b9a\u662f\u5426\u9009\u7528\u5206\u652f\u65f6\uff0c\u6211\u4eec\u5df2\u7ecf\u5728\u63d0\u53d6\u4e0b\u4e0b\u4e00\u6761\u7684\u6307\u4ee4\u4e86\u3002\n  <\/p>\n<p>\n   \u4f60\u5e94\u8be5\u53d1\u73b0\u4e86\uff0c\u5f53\u6211\u4eec\u80fd\u591f\u786e\u5b9a\u662f\u5426\u9009\u7528\u5206\u652f\u7684\u65f6\u5019\uff0c\u5df2\u7ecf\u63d0\u53d6\u4e86\u4e24\u6761\u6307\u4ee4\uff0c\u5728\u6b64\u4e4b\u524d\u5e76\u4e0d\u6e05\u695a\u662f\u5426\u8981<br \/>\n   <code><br \/>\n    kill<br \/>\n   <\/code><br \/>\n   \u6389\uff08\u63d2\u5165<br \/>\n   <code><br \/>\n    nop<br \/>\n   <\/code><br \/>\n   \uff09\u8fd9\u4e24\u4e2a\u8fdb\u5165\u6d41\u6c34\u7ebf\u7684\u6307\u4ee4\uff0c\u76f4\u5230\u83b7\u53d6\u5230<br \/>\n   <code><br \/>\n    zero wire<br \/>\n   <\/code><br \/>\n   \u7684\u4fe1\u53f7\u3002\n  <\/p>\n<p>\n   \u90a3\u4e48\u5230\u8fd9\u91cc\u53c8\u4f1a\u5b58\u5728\u4e00\u4e2a\u95ee\u9898\uff0c\u8003\u8651\u4e00\u4e0b\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528<br \/>\n   <code><br \/>\n    stall<br \/>\n   <\/code><br \/>\n   \u4fe1\u53f7\u505c\u6b62\u5bc4\u5b58\u5668\u79fb\u52a8\uff08\u6539\u53d8\uff09\uff0c\u7136\u540e\u53ef\u4ee5\u5229\u7528\u9009\u62e9\u5668\u91cd\u5b9a\u5411\u6d41\u6c34\u7ebf\u6d41\u5165\u6307\u4ee4\uff0c\u901a\u8fc7\u8fd9\u4e24\u4e2a\u65b9\u6cd5\u5b9e\u73b0\u6d88\u9664\u5148\u524d\u7684\u6d41\u6c34\u7ebf\u4e1a\u52a1\u3002\u90a3\u4e48\u8fd9\u4e24\u4e2a\u52a8\u4f5c\u7684\u4f18\u5148\u7ea7\u5e94\u8be5\u600e\u6837\u9009\u62e9\uff1f\u662f\u968f\u610f\u8fd8\u662f\u5fc5\u987b\u6709\u5148\u540e\u987a\u5e8f\uff1f\n  <\/p>\n<\/p>\n<p>\n   ok\uff0c\u73b0\u5728\u5047\u8bbe<br \/>\n   <code><br \/>\n    stall<br \/>\n   <\/code><br \/>\n   \u4fe1\u53f7\u4f18\u5148\u7ea7\u66f4\u9ad8\u4e00\u4e9b\uff0c\u4e0a\u56fe\u4e2d\u7ea2\u8272\u7684<br \/>\n   <code><br \/>\n    stall<br \/>\n   <\/code><br \/>\n   \u4fe1\u53f7\u7ebf\u4f1a\u963b\u6b62\u5bc4\u5b58\u5668\u6539\u53d8\uff0c<br \/>\n   <br \/>\n   <font color=\"#B50003\"><br \/>\n    \u5c0f\u6ce8\uff1a\uff08\u6587\u7ae0\u672a\u5b8c\uff0c\u8fd1\u671f\u5b8c\u5584\u4e2d\u2026\uff09<br \/>\n   <\/font>\n  <\/p>\n<\/p><\/div>\n<link href=\"https:\/\/csdnimg.cn\/release\/blogv2\/dist\/mdeditor\/css\/editerView\/markdown_views-a5d25dd831.css\" rel=\"stylesheet\"\/>\n <link href=\"https:\/\/csdnimg.cn\/release\/blogv2\/dist\/mdeditor\/css\/style-e504d6a974.css\" rel=\"stylesheet\"\/>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>1. \u6d41\u6c34\u7ebf\u5192\u9669 (Pipeline Hazards) 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