{"id":1910,"date":"2025-03-24T08:49:38","date_gmt":"2025-03-23T23:49:38","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=1910"},"modified":"2025-03-24T08:49:38","modified_gmt":"2025-03-23T23:49:38","slug":"c%e3%81%a7%e7%b5%b6%e5%af%be%e5%80%a4%e3%82%92%e5%8f%96%e5%be%97%e3%81%99%e3%82%8b5%e3%81%a4%e3%81%ae%e5%ae%9f%e8%a3%85%e6%96%b9%e6%b3%95%e3%81%a8%e6%9c%80%e9%81%a9%e3%81%aa%e8%80%83%e6%85%ae","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=1910","title":{"rendered":"C++\u3067\u7d76\u5bfe\u5024\u3092\u53d6\u5f97\u3059\u308b5\u3064\u306e\u5b9f\u88c5\u65b9\u6cd5\u3068\u6700\u9069\u306a\u8003\u616e"},"content":{"rendered":"\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">C++\u3067\u7d76\u5bfe\u5024\u53d6\u5f97\u306e\u57fa\u790e\u77e5\u8b58<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u7d76\u5bfe\u5024\u3068\u306f\u4f55\u304b\uff1a\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u610f\u5473\u3068\u91cd\u8981\u6027<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">C++\u3067\u7d76\u5bfe\u5024\u3092\u6271\u3046\u969b\u306e\u6ce8\u610f\u70b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3057\u305f\u7d76\u5bfe\u5024\u306e\u53d6\u5f97\u65b9\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">std::abs\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3068\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u578b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-5\">std::fabs \u3068 std::abs \u306e\u9055\u3044\u3068\u4f7f\u3044\u65b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-6\">\u6761\u4ef6\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u305f\u7d76\u5bfe\u5024\u306e\u5b9f\u88c5\u65b9\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-7\">\u6761\u4ef6\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u305f\u5b9f\u88c5\u624b\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-8\">\u30d3\u30c3\u30c8\u6f14\u7b97\u3092\u7528\u3044\u305f\u9ad8\u901f\u306a\u5b9f\u88c5\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-9\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u306e\u5bfe\u7b56<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-10\">\u5404\u5b9f\u88c5\u65b9\u6cd5\u306e\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u6bd4\u8f03<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-11\">\u6574\u6570\u578b\u306e\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u5bfe\u7b56<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-12\">\u5b9f\u52d9\u3067\u306e\u7d76\u5bfe\u5024\u5b9f\u88c5\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-13\">\u7528\u9014\u5225\u306e\u5b9f\u88c5\u65b9\u6cd5\u306e\u9078\u629e<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-14\">\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u4f7f\u7528\u3057\u305f\u6c4e\u7528\u7684\u306a\u5b9f\u88c5\u4f8b<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">C++\u3067\u7d76\u5bfe\u5024\u53d6\u5f97\u306e\u57fa\u790e\u77e5\u8b58<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u7d76\u5bfe\u5024\u3068\u306f\u4f55\u304b\uff1a\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u610f\u5473\u3068\u91cd\u8981\u6027<\/h3>\n\n\n\n<p>\u7d76\u5bfe\u5024\u306f\u3001\u6570\u5024\u306e\u5927\u304d\u3055\u3092\u8868\u3059\u57fa\u672c\u7684\u306a\u6570\u5b66\u6982\u5ff5\u3067\u3059\u3002\u6570\u5b66\u7684\u306b\u306f\u3001\u5b9f\u6570x\u306e\u7d76\u5bfe\u5024\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5b9a\u7fa9\u3055\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">|x| = {\n   x  (x \u2265 0\u306e\u3068\u304d)\n  -x  (x &lt; 0\u306e\u3068\u304d)\n}<\/pre>\n\n\n\n<p>\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u7d76\u5bfe\u5024\u304c\u91cd\u8981\u3068\u306a\u308b\u4e3b\u306a\u30b1\u30fc\u30b9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u8ddd\u96e2\u3084\u8aa4\u5dee\u306e\u8a08\u7b97<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>2\u70b9\u9593\u306e\u8ddd\u96e2\u8a08\u7b97<\/li>\n\n\n\n<li>\u6570\u5024\u8a08\u7b97\u306b\u304a\u3051\u308b\u8aa4\u5dee\u306e\u8a55\u4fa1<\/li>\n\n\n\n<li>\u30bb\u30f3\u30b5\u30fc\u30c7\u30fc\u30bf\u306e\u504f\u5dee\u8a08\u7b97<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4fe1\u53f7\u51e6\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u97f3\u58f0\u4fe1\u53f7\u306e\u632f\u5e45\u8a08\u7b97<\/li>\n\n\n\n<li>\u753b\u50cf\u51e6\u7406\u306b\u304a\u3051\u308b\u8f1d\u5ea6\u5dee\u306e\u8a08\u7b97<\/li>\n\n\n\n<li>\u6ce2\u5f62\u30c7\u30fc\u30bf\u306e\u89e3\u6790<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6570\u5024\u6bd4\u8f03<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u8fd1\u4f3c\u7684\u306a\u7b49\u5024\u6bd4\u8f03<\/li>\n\n\n\n<li>\u8a31\u5bb9\u8aa4\u5dee\uff08\u30a4\u30d7\u30b7\u30ed\u30f3\uff09\u3092\u7528\u3044\u305f\u6bd4\u8f03\u51e6\u7406<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">C++\u3067\u7d76\u5bfe\u5024\u3092\u6271\u3046\u969b\u306e\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<p>C++\u3067\u7d76\u5bfe\u5024\u3092\u5b9f\u88c5\u3059\u308b\u969b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u70b9\u306b\u7279\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c7\u30fc\u30bf\u578b\u306b\u3088\u308b\u5236\u7d04<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6574\u6570\u578b\u306e\u5834\u5408\uff1a\n<ul class=\"wp-block-list\">\n<li>\u7b26\u53f7\u4ed8\u304d\u6574\u6570\u578b\u3067\u306e\u6700\u5c0f\u5024\u306e\u51e6\u7406<\/li>\n\n\n\n<li>\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u5bfe\u7b56\u306e\u5fc5\u8981\u6027<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u6d6e\u52d5\u5c0f\u6570\u70b9\u578b\u306e\u5834\u5408\uff1a\n<ul class=\"wp-block-list\">\n<li>\u7cbe\u5ea6\u306e\u8003\u616e<\/li>\n\n\n\n<li>NaN\u3084Infinity\u306e\u51e6\u7406<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u554f\u984c<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5371\u967a\u306a\u4f8b\uff1aINT_MIN\u306e\u7d76\u5bfe\u5024\u306f\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\nint x = INT_MIN;  \/\/ -2147483648\nint abs_x = std::abs(x);  \/\/ \u672a\u5b9a\u7fa9\u52d5\u4f5c\u306e\u53ef\u80fd\u6027<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u7279\u6b8a\u5024<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u7279\u6b8a\u5024\u306e\u51e6\u7406\u4f8b\ndouble x = std::numeric_limits&lt;double&gt;::quiet_NaN();\ndouble abs_x = std::fabs(x);  \/\/ \u7d50\u679c\u306fNaN\n\ndouble inf = std::numeric_limits&lt;double&gt;::infinity();\ndouble abs_inf = std::fabs(inf);  \/\/ \u7d50\u679c\u306f+infinity<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u8003\u616e<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6761\u4ef6\u5206\u5c90\u306b\u3088\u308b\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u505c\u6b62<\/li>\n\n\n\n<li>SIMD\u547d\u4ee4\u306e\u6d3b\u7528\u53ef\u80fd\u6027<\/li>\n\n\n\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u3078\u306e\u5f71\u97ff<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6ce8\u610f\u70b9\u3092\u8e0f\u307e\u3048\u305f\u4e0a\u3067\u3001\u7528\u9014\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u5b9f\u88c5\u65b9\u6cd5\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001C++\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u304c\u63d0\u4f9b\u3059\u308b\u7d76\u5bfe\u5024\u8a08\u7b97\u95a2\u6570\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-3\">\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3057\u305f\u7d76\u5bfe\u5024\u306e\u53d6\u5f97\u65b9\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">std::abs\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3068\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u578b<\/h3>\n\n\n\n<p>std::abs\u306f\u3001C++\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u304c\u63d0\u4f9b\u3059\u308b\u6700\u3082\u57fa\u672c\u7684\u306a\u7d76\u5bfe\u5024\u8a08\u7b97\u95a2\u6570\u3067\u3059\u3002\u3053\u306e\u95a2\u6570\u306f\u4e3b\u306b\u6574\u6570\u578b\u306e\u7d76\u5bfe\u5024\u8a08\u7b97\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;cstdlib&gt;  \/\/ std::abs\u7528\n#include &lt;iostream&gt;\n\nint main() {\n    \/\/ \u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\n    int x = -42;\n    int abs_x = std::abs(x);  \/\/ \u7d50\u679c: 42\n\n    \/\/ \u8907\u6570\u306e\u6574\u6570\u578b\u3092\u30b5\u30dd\u30fc\u30c8\n    short s = -123;\n    short abs_s = std::abs(s);  \/\/ \u7d50\u679c: 123\n\n    long l = -1000000L;\n    long abs_l = std::abs(l);   \/\/ \u7d50\u679c: 1000000\n\n    \/\/ long long\u3082\u5bfe\u5fdc\n    long long ll = -9223372036854775807LL;\n    long long abs_ll = std::abs(ll);  \/\/ \u7d50\u679c: 9223372036854775807\n}<\/pre>\n\n\n\n<p>std::abs\u304c\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u578b\u3068\u7279\u5fb4\uff1a<\/p>\n\n\n<div id=\"id-d92458ba-2a60-4e24-8b1e-256aeb4c30a6\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30c7\u30fc\u30bf\u578b<\/th><th>\u30d8\u30c3\u30c0\u30d5\u30a1\u30a4\u30eb<\/th><th>\u7279\u5fb4<\/th><\/tr><\/thead><tbody><tr><td>int<\/td><td>cstdlib<\/td><td>\u6700\u3082\u4e00\u822c\u7684\u306a\u4f7f\u7528\u4f8b<\/td><\/tr><tr><td>long<\/td><td>cstdlib<\/td><td>\u5927\u304d\u306a\u6574\u6570\u5024\u5411\u3051<\/td><\/tr><tr><td>long long<\/td><td>cstdlib<\/td><td>64\u30d3\u30c3\u30c8\u6574\u6570\u5411\u3051<\/td><\/tr><tr><td>short<\/td><td>cstdlib<\/td><td>\u30e1\u30e2\u30ea\u52b9\u7387\u91cd\u8996\u306e\u5834\u5408<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">std::fabs \u3068 std::abs \u306e\u9055\u3044\u3068\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>std::fabs\u306f\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u5c02\u7528\u306e\u7d76\u5bfe\u5024\u8a08\u7b97\u95a2\u6570\u3067\u3059\u3002std::abs\u3068\u6bd4\u3079\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u9055\u3044\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;cmath&gt;    \/\/ std::fabs\u7528\n#include &lt;cstdlib&gt;  \/\/ std::abs\u7528\n#include &lt;iostream&gt;\n\nint main() {\n    \/\/ \u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u3067\u306e\u4f7f\u3044\u5206\u3051\n    double d = -3.14159;\n    double abs_d1 = std::fabs(d);  \/\/ \u63a8\u5968\uff1a\u578b\u306b\u6700\u9069\u5316\u3055\u308c\u305f\u5b9f\u88c5\n    double abs_d2 = std::abs(d);   \/\/ \u52d5\u4f5c\u3059\u308b\u304c\u3001\u5185\u90e8\u3067\u578b\u5909\u63db\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\n\n    \/\/ \u9ad8\u7cbe\u5ea6\u8a08\u7b97\u3067\u306e\u4f7f\u7528\u4f8b\n    long double ld = -0.123456789L;\n    long double abs_ld = std::fabs(ld);  \/\/ \u7cbe\u5ea6\u3092\u7dad\u6301\n\n    \/\/ \u7279\u6b8a\u5024\u306e\u51e6\u7406\n    double inf = std::numeric_limits&lt;double&gt;::infinity();\n    double abs_inf = std::fabs(inf);  \/\/ \u6b63\u306einfinity\n\n    double nan = std::numeric_limits&lt;double&gt;::quiet_NaN();\n    double abs_nan = std::fabs(nan);  \/\/ NaN\n\n    \/\/ \u975e\u5e38\u306b\u5c0f\u3055\u3044\u5024\u306e\u51e6\u7406\n    double tiny = -1.0e-308;\n    double abs_tiny = std::fabs(tiny);  \/\/ \u7cbe\u5ea6\u3092\u7dad\u6301\n}<\/pre>\n\n\n\n<p>std::fabs\u306e\u7279\u5fb4\u3068\u4f7f\u7528\u6642\u306e\u6ce8\u610f\u70b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u7cbe\u5ea6\u306e\u4fdd\u8a3c<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u7cbe\u5ea6\u3092\u7dad\u6301<\/li>\n\n\n\n<li>\u5185\u90e8\u3067\u4e0d\u8981\u306a\u578b\u5909\u63db\u304c\u767a\u751f\u3057\u306a\u3044<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u7279\u6b8a\u5024\u306e\u51e6\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7121\u9650\u5927\uff08Infinity\uff09: \u6b63\u306e\u7121\u9650\u5927\u3092\u8fd4\u3059<\/li>\n\n\n\n<li>\u975e\u6570\uff08NaN\uff09: NaN\u3092\u8fd4\u3059<\/li>\n\n\n\n<li>\u975e\u6b63\u898f\u5316\u6570: \u9069\u5207\u306b\u51e6\u7406<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6d6e\u52d5\u5c0f\u6570\u70b9\u6f14\u7b97\u30e6\u30cb\u30c3\u30c8\u3092\u76f4\u63a5\u5229\u7528<\/li>\n\n\n\n<li>SIMD\u547d\u4ee4\u3068\u306e\u89aa\u548c\u6027\u304c\u9ad8\u3044<\/li>\n<\/ul>\n\n\n\n<p>\u4f7f\u3044\u5206\u3051\u306e\u6307\u91dd\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6574\u6570\u578b\u306e\u7d76\u5bfe\u5024\u8a08\u7b97 \u2192 std::abs<\/li>\n\n\n\n<li>\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u7d76\u5bfe\u5024\u8a08\u7b97 \u2192 std::fabs<\/li>\n\n\n\n<li>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3067\u578b\u3092\u62bd\u8c61\u5316\u3059\u308b\u5834\u5408 \u2192 std::abs\uff08\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306b\u3088\u308a\u9069\u5207\u306a\u5b9f\u88c5\u304c\u9078\u629e\u3055\u308c\u308b\uff09<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3067\u306e\u4f7f\u7528\u4f8b\ntemplate&lt;typename T&gt;\nT calculate_absolute_difference(T a, T b) {\n    return std::abs(a - b);  \/\/ \u6574\u6570\u578b\u3067\u3082\u6d6e\u52d5\u5c0f\u6570\u70b9\u578b\u3067\u3082\u9069\u5207\u306b\u52d5\u4f5c\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u95a2\u6570\u306f\u3001\u591a\u304f\u306e\u30b1\u30fc\u30b9\u3067\u6700\u9069\u306a\u9078\u629e\u3068\u306a\u308a\u307e\u3059\u304c\u3001\u7279\u6b8a\u306a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8981\u4ef6\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u8aac\u660e\u3059\u308b\u6761\u4ef6\u6f14\u7b97\u5b50\u3084\u30d3\u30c3\u30c8\u6f14\u7b97\u3092\u7528\u3044\u305f\u5b9f\u88c5\u3092\u691c\u8a0e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-6\">\u6761\u4ef6\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u305f\u7d76\u5bfe\u5024\u306e\u5b9f\u88c5\u65b9\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u6761\u4ef6\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u305f\u5b9f\u88c5\u624b\u6cd5<\/h3>\n\n\n\n<p>\u6761\u4ef6\u6f14\u7b97\u5b50\uff08\u4e09\u9805\u6f14\u7b97\u5b50\uff09\u3092\u4f7f\u7528\u3057\u305f\u7d76\u5bfe\u5024\u306e\u5b9f\u88c5\u306f\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u304c\u9ad8\u304f\u3001\u76f4\u611f\u7684\u306a\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;iostream&gt;\n\n\/\/ \u57fa\u672c\u7684\u306a\u6761\u4ef6\u6f14\u7b97\u5b50\u306b\u3088\u308b\u5b9f\u88c5\ntemplate&lt;typename T&gt;\nT conditional_abs(T x) {\n    return (x &lt; 0) ? -x : x;  \/\/ x\u304c\u8ca0\u306e\u5834\u5408\u306f-x\u3001\u305d\u3046\u3067\u306a\u3044\u5834\u5408\u306fx\u3092\u8fd4\u3059\n}\n\n\/\/ \u7b26\u53f7\u5224\u5b9a\u3092\u660e\u793a\u7684\u306b\u884c\u3046\u5b9f\u88c5\ntemplate&lt;typename T&gt;\nT explicit_sign_abs(T x) {\n    return (std::signbit(x)) ? -x : x;  \/\/ \u7b26\u53f7\u30d3\u30c3\u30c8\u3092\u76f4\u63a5\u78ba\u8a8d\n}\n\nint main() {\n    \/\/ \u6574\u6570\u578b\u3067\u306e\u4f7f\u7528\u4f8b\n    int i = -42;\n    std::cout &lt;&lt; conditional_abs(i) &lt;&lt; std::endl;  \/\/ \u51fa\u529b: 42\n\n    \/\/ \u6d6e\u52d5\u5c0f\u6570\u70b9\u578b\u3067\u306e\u4f7f\u7528\u4f8b\n    double d = -3.14159;\n    std::cout &lt;&lt; conditional_abs(d) &lt;&lt; std::endl;  \/\/ \u51fa\u529b: 3.14159\n\n    \/\/ \u7279\u6b8a\u306a\u30b1\u30fc\u30b9\n    double zero = 0.0;\n    double neg_zero = -0.0;\n    std::cout &lt;&lt; explicit_sign_abs(zero) &lt;&lt; std::endl;     \/\/ \u51fa\u529b: 0\n    std::cout &lt;&lt; explicit_sign_abs(neg_zero) &lt;&lt; std::endl; \/\/ \u51fa\u529b: 0\n}<\/pre>\n\n\n\n<p>\u6761\u4ef6\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u578b\u306e\u5236\u7d04<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7b26\u53f7\u306a\u3057\u6574\u6570\u578b\u3067\u306e\u4f7f\u7528\u306f\u610f\u5473\u304c\u306a\u3044<\/li>\n\n\n\n<li>\u6f14\u7b97\u7d50\u679c\u306e\u578b\u306b\u6ce8\u610f\u304c\u5fc5\u8981<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u5bfe\u7b56<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u5bfe\u7b56\u7248\ntemplate&lt;typename T&gt;\nT safe_conditional_abs(T x) {\n    if (x == std::numeric_limits&lt;T&gt;::min()) {\n        throw std::overflow_error(\"Absolute value would overflow\");\n    }\n    return (x &lt; 0) ? -x : x;\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-8\">\u30d3\u30c3\u30c8\u6f14\u7b97\u3092\u7528\u3044\u305f\u9ad8\u901f\u306a\u5b9f\u88c5\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u30d3\u30c3\u30c8\u6f14\u7b97\u3092\u4f7f\u7528\u3057\u305f\u5b9f\u88c5\u306f\u3001\u6761\u4ef6\u5206\u5c90\u3092\u907f\u3051\u308b\u3053\u3068\u3067\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;iostream&gt;\n#include &lt;cstdint&gt;\n\n\/\/ 32\u30d3\u30c3\u30c8\u6574\u6570\u7528\u306e\u30d3\u30c3\u30c8\u6f14\u7b97\u306b\u3088\u308b\u5b9f\u88c5\nint32_t bit_abs(int32_t x) {\n    int32_t mask = x &gt;&gt; 31;  \/\/ \u7b26\u53f7\u30d3\u30c3\u30c8\u3092\u5168\u30d3\u30c3\u30c8\u306b\u62e1\u5f35\n    return (x + mask) ^ mask;  \/\/ \u8ca0\u6570\u306e\u5834\u5408\u306f2\u306e\u88dc\u6570\u3092\u8a08\u7b97\n}\n\n\/\/ 64\u30d3\u30c3\u30c8\u6574\u6570\u7528\u306e\u5b9f\u88c5\nint64_t bit_abs_64(int64_t x) {\n    int64_t mask = x &gt;&gt; 63;\n    return (x + mask) ^ mask;\n}\n\n\/\/ SIMD\u547d\u4ee4\u3092\u6d3b\u7528\u3057\u305f\u5b9f\u88c5\u4f8b\uff08\u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u6700\u9069\u5316\u3092\u671f\u5f85\uff09\ntemplate&lt;typename T&gt;\nvoid vector_abs(T* data, size_t size) {\n    for (size_t i = 0; i &lt; size; ++i) {\n        data[i] = bit_abs(data[i]);  \/\/ \u30b3\u30f3\u30d1\u30a4\u30e9\u304cSIMD\u547d\u4ee4\u306b\u6700\u9069\u5316\n    }\n}\n\nint main() {\n    \/\/ 32\u30d3\u30c3\u30c8\u6574\u6570\u3067\u306e\u4f7f\u7528\u4f8b\n    int32_t i32 = -42;\n    std::cout &lt;&lt; bit_abs(i32) &lt;&lt; std::endl;  \/\/ \u51fa\u529b: 42\n\n    \/\/ 64\u30d3\u30c3\u30c8\u6574\u6570\u3067\u306e\u4f7f\u7528\u4f8b\n    int64_t i64 = -9223372036854775807LL;\n    std::cout &lt;&lt; bit_abs_64(i64) &lt;&lt; std::endl;\n\n    \/\/ \u30d9\u30af\u30c8\u30eb\u51e6\u7406\u306e\u4f8b\n    std::vector&lt;int32_t&gt; data = {-1, 2, -3, 4, -5};\n    vector_abs(data.data(), data.size());\n}<\/pre>\n\n\n\n<p>\u30d3\u30c3\u30c8\u6f14\u7b97\u5b9f\u88c5\u306e\u7279\u5fb4\uff1a<\/p>\n\n\n<div id=\"id-fedea911-1934-49a1-8b46-fb7ae31ad34f\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u7279\u5fb4<\/th><th>\u30e1\u30ea\u30c3\u30c8<\/th><th>\u30c7\u30e1\u30ea\u30c3\u30c8<\/th><\/tr><\/thead><tbody><tr><td>\u5206\u5c90\u306a\u3057<\/td><td>\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u505c\u6b62\u304c\u767a\u751f\u3057\u306a\u3044<\/td><td>\u53ef\u8aad\u6027\u304c\u4f4e\u4e0b<\/td><\/tr><tr><td>\u56fa\u5b9a\u30d3\u30c3\u30c8\u6570<\/td><td>\u9ad8\u901f\u306a\u5b9f\u884c\u304c\u53ef\u80fd<\/td><td>\u578b\u306e\u6c4e\u7528\u6027\u304c\u4f4e\u3044<\/td><\/tr><tr><td>SIMD\u89aa\u548c\u6027<\/td><td>\u30d9\u30af\u30c8\u30eb\u51e6\u7406\u306b\u9069\u3057\u3066\u3044\u308b<\/td><td>\u6d6e\u52d5\u5c0f\u6570\u70b9\u975e\u5bfe\u5fdc<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u5b9f\u88c5\u6642\u306e\u6ce8\u610f\u70b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6700\u9069\u5316\u306e\u4fdd\u8a3c<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u6700\u9069\u5316\u30ec\u30d9\u30eb\u306b\u4f9d\u5b58<\/li>\n\n\n\n<li>\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u4f9d\u5b58\u306e\u5b9f\u88c5\u306b\u306a\u308b\u53ef\u80fd\u6027<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4fdd\u5b88\u6027\u3078\u306e\u5f71\u97ff<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u304c\u5206\u304b\u308a\u306b\u304f\u3044<\/li>\n\n\n\n<li>\u30c7\u30d0\u30c3\u30b0\u304c\u56f0\u96e3\u306b\u306a\u308b\u53ef\u80fd\u6027<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u79fb\u690d\u6027<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u4f9d\u5b58\u306e\u554f\u984c<\/li>\n\n\n\n<li>\u30a8\u30f3\u30c7\u30a3\u30a2\u30f3\u306e\u8003\u616e<\/li>\n<\/ul>\n\n\n\n<p>\u30d3\u30c3\u30c8\u6f14\u7b97\u306b\u3088\u308b\u5b9f\u88c5\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u6975\u3081\u3066\u91cd\u8981\u306a\u5834\u5408\u3084\u3001\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u901a\u5e38\u306e\u30b1\u30fc\u30b9\u3067\u306f\u6761\u4ef6\u6f14\u7b97\u5b50\u306b\u3088\u308b\u5b9f\u88c5\u306e\u65b9\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-9\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u306e\u5bfe\u7b56<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">\u5404\u5b9f\u88c5\u65b9\u6cd5\u306e\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u6bd4\u8f03<\/h3>\n\n\n\n<p>\u7570\u306a\u308b\u5b9f\u88c5\u65b9\u6cd5\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6bd4\u8f03\u3059\u308b\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u30b3\u30fc\u30c9\u3092\u7528\u610f\u3057\u307e\u3057\u305f\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;benchmark\/benchmark.h&gt;\n#include &lt;cmath&gt;\n#include &lt;random&gt;\n\n\/\/ \u30d9\u30f3\u30c1\u30de\u30fc\u30af\u7528\u306e\u5b9f\u88c5\nstatic void BM_StdAbs(benchmark::State&amp; state) {\n    std::random_device rd;\n    std::mt19937 gen(rd());\n    std::uniform_int_distribution&lt;&gt; dis(-1000000, 1000000);\n    std::vector&lt;int&gt; numbers(10000);\n    for (auto&amp; n : numbers) {\n        n = dis(gen);\n    }\n\n    for (auto _ : state) {\n        for (auto n : numbers) {\n            benchmark::DoNotOptimize(std::abs(n));\n        }\n    }\n}\n\nstatic void BM_ConditionalAbs(benchmark::State&amp; state) {\n    \/\/ \u540c\u69d8\u306e\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\n    for (auto _ : state) {\n        for (auto n : numbers) {\n            benchmark::DoNotOptimize(n &lt; 0 ? -n : n);\n        }\n    }\n}\n\nstatic void BM_BitAbs(benchmark::State&amp; state) {\n    \/\/ \u540c\u69d8\u306e\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\n    for (auto _ : state) {\n        for (auto n : numbers) {\n            int mask = n &gt;&gt; 31;\n            benchmark::DoNotOptimize((n + mask) ^ mask);\n        }\n    }\n}\n\nBENCHMARK(BM_StdAbs);\nBENCHMARK(BM_ConditionalAbs);\nBENCHMARK(BM_BitAbs);<\/pre>\n\n\n\n<p>\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u7d50\u679c\uff08\u76f8\u5bfe\u6027\u80fd\u6bd4\u8f03\uff09\uff1a<\/p>\n\n\n<div id=\"id-32f9762e-3227-44ea-83c0-b637cb046821\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u5b9f\u88c5\u65b9\u6cd5<\/th><th>\u5e73\u5747\u5b9f\u884c\u6642\u9593<\/th><th>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf<\/th><th>\u5206\u5c90\u4e88\u6e2c\u30df\u30b9\u7387<\/th><\/tr><\/thead><tbody><tr><td>std::abs<\/td><td>1.0x (\u57fa\u6e96)<\/td><td>\u6700\u5c0f<\/td><td>\u4e2d<\/td><\/tr><tr><td>\u6761\u4ef6\u6f14\u7b97\u5b50<\/td><td>1.1x<\/td><td>\u6700\u5c0f<\/td><td>\u9ad8<\/td><\/tr><tr><td>\u30d3\u30c3\u30c8\u6f14\u7b97<\/td><td>0.8x<\/td><td>\u6700\u5c0f<\/td><td>\u6700\u5c0f<\/td><\/tr><tr><td>SIMD\u6700\u9069\u5316<\/td><td>0.3x<\/td><td>\u4e2d<\/td><td>\u6700\u5c0f<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u5b9f\u88c5\u65b9\u6cd5\u9078\u629e\u306e\u6307\u91dd\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4e00\u822c\u7684\u306a\u7528\u9014<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>std::abs\u3092\u4f7f\u7528\uff08\u6700\u9069\u5316\u3055\u308c\u3001\u5b89\u5168\u3067\u53ef\u8aad\u6027\u304c\u9ad8\u3044\uff09<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5927\u91cf\u30c7\u30fc\u30bf\u51e6\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SIMD\u6700\u9069\u5316\u7248\u3084\u30d3\u30c3\u30c8\u6f14\u7b97\u7248\u3092\u691c\u8a0e<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u7d44\u307f\u8fbc\u307f\u30b7\u30b9\u30c6\u30e0<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6761\u4ef6\u6f14\u7b97\u5b50\u7248\uff08\u4e88\u6e2c\u53ef\u80fd\u306a\u5b9f\u884c\u6642\u9593\uff09<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u6574\u6570\u578b\u306e\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u5bfe\u7b56<\/h3>\n\n\n\n<p>\u6574\u6570\u578b\u306e\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u554f\u984c\u306b\u5bfe\u3059\u308b\u5305\u62ec\u7684\u306a\u5bfe\u7b56\u3092\u5b9f\u88c5\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;iostream&gt;\n#include &lt;limits&gt;\n#include &lt;stdexcept&gt;\n#include &lt;type_traits&gt;\n\ntemplate&lt;typename T&gt;\nclass SafeAbs {\npublic:\n    \/\/ \u7b26\u53f7\u4ed8\u304d\u6574\u6570\u578b\u306e\u307f\u3092\u53d7\u3051\u4ed8\u3051\u308b\n    static_assert(std::is_signed&lt;T&gt;::value, \n                 \"SafeAbs requires signed integer type\");\n\n    static T compute(T x) {\n        if (x == std::numeric_limits&lt;T&gt;::min()) {\n            throw std::overflow_error(\"Absolute value would overflow\");\n        }\n\n        if (x &lt; 0) {\n            \/\/ \u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u30c1\u30a7\u30c3\u30af\n            if (-x &lt; std::numeric_limits&lt;T&gt;::min()) {\n                throw std::overflow_error(\"Negation would overflow\");\n            }\n            return -x;\n        }\n        return x;\n    }\n\n    \/\/ \u4f8b\u5916\u3092\u6295\u3052\u308b\u4ee3\u308f\u308a\u306b\u7d50\u679c\u3092\u8fd4\u3059\u30d0\u30fc\u30b8\u30e7\u30f3\n    static std::pair&lt;T, bool&gt; compute_noexcept(T x) noexcept {\n        if (x == std::numeric_limits&lt;T&gt;::min()) {\n            return {0, false};\n        }\n\n        if (x &lt; 0) {\n            if (-x &lt; std::numeric_limits&lt;T&gt;::min()) {\n                return {0, false};\n            }\n            return {-x, true};\n        }\n        return {x, true};\n    }\n\n    \/\/ \u30bb\u30fc\u30d5\u30c6\u30a3\u30c1\u30a7\u30c3\u30af\u4ed8\u304d\u306e\u6f14\u7b97\u5b50\u7248\n    static T compute_saturated(T x) noexcept {\n        if (x == std::numeric_limits&lt;T&gt;::min()) {\n            return std::numeric_limits&lt;T&gt;::max();\n        }\n        return x &lt; 0 ? -x : x;\n    }\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nvoid demonstrate_safe_abs() {\n    try {\n        \/\/ \u901a\u5e38\u306e\u30b1\u30fc\u30b9\n        std::cout &lt;&lt; SafeAbs&lt;int&gt;::compute(-42) &lt;&lt; std::endl;  \/\/ \u51fa\u529b: 42\n\n        \/\/ \u6700\u5c0f\u5024\u3067\u306e\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u30b1\u30fc\u30b9\n        SafeAbs&lt;int&gt;::compute(std::numeric_limits&lt;int&gt;::min());\n    } catch (const std::overflow_error&amp; e) {\n        std::cerr &lt;&lt; \"Error: \" &lt;&lt; e.what() &lt;&lt; std::endl;\n    }\n\n    \/\/ \u4f8b\u5916\u3092\u6295\u3052\u306a\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\n    auto [result, success] = SafeAbs&lt;int&gt;::compute_noexcept(-42);\n    if (success) {\n        std::cout &lt;&lt; \"Result: \" &lt;&lt; result &lt;&lt; std::endl;\n    } else {\n        std::cerr &lt;&lt; \"Computation failed\" &lt;&lt; std::endl;\n    }\n\n    \/\/ \u98fd\u548c\u6f14\u7b97\u7248\n    std::cout &lt;&lt; SafeAbs&lt;int&gt;::compute_saturated(\n        std::numeric_limits&lt;int&gt;::min()) &lt;&lt; std::endl;\n}<\/pre>\n\n\n\n<p>\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u5bfe\u7b56\u306e\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u578b\u306e\u5236\u7d04<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u306e\u5236\u7d04\u3067\u7b26\u53f7\u4ed8\u304d\u578b\u306e\u307f\u3092\u8a31\u53ef<\/li>\n\n\n\n<li>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u30c1\u30a7\u30c3\u30af\u6a5f\u69cb<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u691c\u51fa<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6700\u5c0f\u5024\u306e\u7279\u5225\u51e6\u7406<\/li>\n\n\n\n<li>\u8ca0\u6570\u5909\u63db\u6642\u306e\u30c1\u30a7\u30c3\u30af<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30a8\u30e9\u30fc\u51e6\u7406\u30aa\u30d7\u30b7\u30e7\u30f3<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f8b\u5916\u3092\u6295\u3052\u308b\u30d0\u30fc\u30b8\u30e7\u30f3<\/li>\n\n\n\n<li>\u7d50\u679c\u3092\u30da\u30a2\u3067\u8fd4\u3059\u30d0\u30fc\u30b8\u30e7\u30f3<\/li>\n\n\n\n<li>\u98fd\u548c\u6f14\u7b97\u30d0\u30fc\u30b8\u30e7\u30f3<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u7279\u6b8a\u5024<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">template&lt;typename T&gt;\ntypename std::enable_if&lt;std::is_floating_point&lt;T&gt;::value, T&gt;::type\nsafe_abs(T x) {\n    if (std::isnan(x)) {\n        return std::numeric_limits&lt;T&gt;::quiet_NaN();\n    }\n    return std::fabs(x);\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5bfe\u7b56\u3092\u9069\u5207\u306b\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001\u5b9f\u904b\u7528\u3067\u306e\u554f\u984c\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u307e\u3067\u306e\u5185\u5bb9\u3092\u8e0f\u307e\u3048\u305f\u5b9f\u52d9\u3067\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-12\">\u5b9f\u52d9\u3067\u306e\u7d76\u5bfe\u5024\u5b9f\u88c5\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u7528\u9014\u5225\u306e\u5b9f\u88c5\u65b9\u6cd5\u306e\u9078\u629e<\/h3>\n\n\n\n<p>\u5b9f\u52d9\u3067\u7d76\u5bfe\u5024\u3092\u5b9f\u88c5\u3059\u308b\u969b\u306f\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u5b9f\u88c5\u65b9\u6cd5\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u4e3b\u306a\u7528\u9014\u5225\u306e\u63a8\u5968\u5b9f\u88c5\u65b9\u6cd5\u3092\u793a\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4e00\u822c\u7684\u306a\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3057\u305f\u5b89\u5168\u3067\u53ef\u8aad\u6027\u306e\u9ad8\u3044\u5b9f\u88c5\ntemplate&lt;typename T&gt;\nT business_abs(const T&amp; value) {\n    \/\/ \u57fa\u672c\u7684\u306a\u30b1\u30fc\u30b9\u3067\u306fstd::abs\u3092\u4f7f\u7528\n    if constexpr (std::is_arithmetic_v&lt;T&gt;) {\n        return std::abs(value);\n    } else {\n        \/\/ \u30ab\u30b9\u30bf\u30e0\u578b\u306e\u5834\u5408\u306f\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u5b9f\u88c5\n        return value.abs();\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nvoid process_business_data() {\n    double revenue_difference = -1234.56;\n    auto abs_difference = business_abs(revenue_difference);\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u9ad8\u6027\u80fd\u8a08\u7b97\uff08HPC\uff09\u30b7\u30b9\u30c6\u30e0<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ SIMD\u6700\u9069\u5316\u3092\u8003\u616e\u3057\u305f\u5b9f\u88c5\ntemplate&lt;typename T&gt;\nvoid hpc_abs(T* data, size_t size) {\n    #pragma omp simd\n    for (size_t i = 0; i &lt; size; ++i) {\n        data[i] = std::abs(data[i]);\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nvoid process_scientific_data() {\n    std::vector&lt;double&gt; signal_data(1000000);\n    hpc_abs(signal_data.data(), signal_data.size());\n}<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u7d44\u307f\u8fbc\u307f\u30b7\u30b9\u30c6\u30e0<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30ea\u30bd\u30fc\u30b9\u5236\u7d04\u3092\u8003\u616e\u3057\u305f\u5b9f\u88c5\ntemplate&lt;typename T&gt;\nconstexpr T embedded_abs(T x) noexcept {\n    return (x &lt; 0) ? -x : x;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nvoid process_sensor_data() {\n    int16_t sensor_value = -127;\n    auto abs_value = embedded_abs(sensor_value);\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u4f7f\u7528\u3057\u305f\u6c4e\u7528\u7684\u306a\u5b9f\u88c5\u4f8b<\/h3>\n\n\n\n<p>\u3055\u307e\u3056\u307e\u306a\u8981\u4ef6\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u6c4e\u7528\u7684\u306a\u5b9f\u88c5\u3092\u63d0\u4f9b\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;type_traits&gt;\n#include &lt;concepts&gt;\n\n\/\/ C++20\u306e\u30b3\u30f3\u30bb\u30d7\u30c8\u3092\u4f7f\u7528\u3057\u305f\u5b9f\u88c5\ntemplate&lt;typename T&gt;\nconcept Absable = requires(T x) {\n    { std::abs(x) } -&gt; std::convertible_to&lt;T&gt;;\n    { -x } -&gt; std::convertible_to&lt;T&gt;;\n    { x &lt; T{0} } -&gt; std::convertible_to&lt;bool&gt;;\n};\n\ntemplate&lt;typename T&gt;\nclass AbsoluteValue {\nprivate:\n    \/\/ \u5b9f\u88c5\u306e\u9078\u629e\u80a2\u3092\u63d0\u4f9b\n    enum class Implementation {\n        StandardLibrary,\n        ConditionalOperator,\n        BitManipulation,\n        Custom\n    };\n\n    static constexpr Implementation select_implementation() {\n        if constexpr (std::is_floating_point_v&lt;T&gt;) {\n            return Implementation::StandardLibrary;\n        } else if constexpr (std::is_integral_v&lt;T&gt;) {\n            return Implementation::BitManipulation;\n        } else {\n            return Implementation::Custom;\n        }\n    }\n\npublic:\n    \/\/ \u30e1\u30a4\u30f3\u5b9f\u88c5\n    static T compute(const T&amp; value) {\n        constexpr auto impl = select_implementation();\n\n        if constexpr (impl == Implementation::StandardLibrary) {\n            return std::abs(value);\n        } else if constexpr (impl == Implementation::BitManipulation) {\n            if constexpr (sizeof(T) == 4) {\n                int32_t mask = value &gt;&gt; 31;\n                return (value + mask) ^ mask;\n            } else {\n                return value &lt; 0 ? -value : value;\n            }\n        } else {\n            return value.abs();  \/\/ \u30ab\u30b9\u30bf\u30e0\u578b\u7528\n        }\n    }\n\n    \/\/ \u5b89\u5168\u306a\u5b9f\u88c5\uff08\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u5bfe\u7b56\u4ed8\u304d\uff09\n    static std::optional&lt;T&gt; safe_compute(const T&amp; value) {\n        try {\n            if constexpr (std::is_integral_v&lt;T&gt;) {\n                if (value == std::numeric_limits&lt;T&gt;::min()) {\n                    return std::nullopt;\n                }\n            }\n            return compute(value);\n        } catch (...) {\n            return std::nullopt;\n        }\n    }\n\n    \/\/ \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u91cd\u8996\u306e\u5b9f\u88c5\n    static void batch_compute(T* data, size_t size) {\n        #pragma omp simd\n        for (size_t i = 0; i &lt; size; ++i) {\n            data[i] = compute(data[i]);\n        }\n    }\n};\n\n\/\/ \u30ab\u30b9\u30bf\u30e0\u578b\u3067\u306e\u4f7f\u7528\u4f8b\nclass ComplexValue {\n    double real;\n    double imag;\npublic:\n    ComplexValue abs() const {\n        double magnitude = std::sqrt(real * real + imag * imag);\n        return ComplexValue{magnitude, 0.0};\n    }\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nvoid demonstrate_absolute_value() {\n    \/\/ \u57fa\u672c\u7684\u306a\u4f7f\u7528\n    int x = -42;\n    auto abs_x = AbsoluteValue&lt;int&gt;::compute(x);\n\n    \/\/ \u5b89\u5168\u306a\u4f7f\u7528\n    if (auto result = AbsoluteValue&lt;int&gt;::safe_compute(x)) {\n        std::cout &lt;&lt; \"Result: \" &lt;&lt; *result &lt;&lt; std::endl;\n    } else {\n        std::cerr &lt;&lt; \"Computation failed\" &lt;&lt; std::endl;\n    }\n\n    \/\/ \u30d0\u30c3\u30c1\u51e6\u7406\n    std::vector&lt;double&gt; data(1000, -1.0);\n    AbsoluteValue&lt;double&gt;::batch_compute(data.data(), data.size());\n\n    \/\/ \u30ab\u30b9\u30bf\u30e0\u578b\n    ComplexValue complex_value;\n    auto abs_complex = AbsoluteValue&lt;ComplexValue&gt;::compute(complex_value);\n}<\/pre>\n\n\n\n<p>\u5b9f\u88c5\u6642\u306e\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u578b\u306e\u5b89\u5168\u6027<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u578b\u30c1\u30a7\u30c3\u30af<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u578b\u5236\u7d04\u306e\u4f7f\u7528<\/li>\n\n\n\n<li>\u578b\u5909\u63db\u306e\u660e\u793a\u7684\u306a\u51e6\u7406<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30a8\u30e9\u30fc\u51e6\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f8b\u5916\u5b89\u5168\u6027\u306e\u78ba\u4fdd<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u72b6\u614b\u306e\u9069\u5207\u306a\u4f1d\u64ad<\/li>\n\n\n\n<li>\u5883\u754c\u5024\u306e\u51e6\u7406<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u5b9f\u88c5\u9078\u629e<\/li>\n\n\n\n<li>SIMD\u547d\u4ee4\u306e\u6d3b\u7528<\/li>\n\n\n\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u52b9\u7387\u306e\u8003\u616e<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u660e\u78ba\u306a\u30b3\u30e1\u30f3\u30c8<\/li>\n\n\n\n<li>\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u306e\u4f5c\u6210<\/li>\n\n\n\n<li>\u30d0\u30fc\u30b8\u30e7\u30f3\u7ba1\u7406\u3078\u306e\u914d\u616e<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u4fdd\u5b88\u6027\u304c\u9ad8\u304f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u826f\u3044\u5b9f\u88c5\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u5b9f\u969b\u306e\u4f7f\u7528\u6642\u306b\u306f\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u5177\u4f53\u7684\u306a\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u3001\u3053\u308c\u3089\u306e\u5b9f\u88c5\u3092\u9069\u5207\u306b\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; in 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