{"id":2407,"date":"2025-04-15T12:34:57","date_gmt":"2025-04-15T12:34:57","guid":{"rendered":"https:\/\/webprojects.cloud\/wordpress\/splatco\/?post_type=spl_knowledgebase&#038;p=2407"},"modified":"2025-06-10T08:42:13","modified_gmt":"2025-06-10T08:42:13","slug":"fwtoieee-d21","status":"publish","type":"spl_knowledgebase","link":"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/programming-reference\/instructions-arranged-by-function\/floating-point-instructions\/fwtoieee-d21\/","title":{"rendered":"fWtoIEEE [D>=21]"},"content":{"rendered":"\n<p>Converts the contents of W from SPLat floating point format to big endian IEEE-754 format. This involves re-arranging the byte and bit order to make the number compatible with 3rd party equipment such as graphics HMIs. After this instruction has been executed the data in W should NOT be operated on with any floating point calculation.<\/p>\n\n\n\n<p>This instruction is not accurately simulated by SPLat\/PC. In simulation W is set to NaN (Not a Number). That means you cannot use it to explore the two floating point formats.<\/p>\n\n\n\n<p>Explanation: The floating point format adopted in SPLat is a special format designed to be more efficient for implementation in an 8-bit processor. It keeps mantissa and exponent in separate bytes, whereas in IEEE they cross byte boundaries.<\/p>\n\n\n\n<p><a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/glossary-of-terms\/#o2825\">Dialect<\/a>\u00a0restriction: Available only in boards with dialect 21 or greater.<\/p>\n\n\n\n<p>See also\u00a0<code><a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/programming-reference\/instructions-arranged-by-function\/floating-point-instructions\/fieeetow-d21\/\">fIEEEtoW<\/a>, <a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/programming-reference\/instructions-arranged-by-function\/floating-point-instructions\/fieeetowr-d21\/\">fIEEEtoWR<\/a>, <a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/programming-reference\/instructions-arranged-by-function\/floating-point-instructions\/fwtoieeer-d21\/\">fWtoIEEER<\/a>, <a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/programming-reference\/instructions-arranged-by-function\/floating-point-instructions\/fixtomem16u-mm-d21\/\">FixToMem16U<\/a>, <a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/programming-reference\/instructions-arranged-by-function\/floating-point-instructions\/fixtomem16s-mm-d21\/\">FixToMem16S<\/a>, <a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/programming-reference\/instructions-arranged-by-function\/floating-point-instructions\/floatmem16u-mm-d21\/\">FloatMem16U<\/a>, <a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/programming-reference\/instructions-arranged-by-function\/floating-point-instructions\/floatmem16s-mm-d21\/\">FloatMem16S<\/a><\/code><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Converts the contents of W from SPLat floating point format to big endian IEEE-754 format. This involves re-arranging the byte and bit order to make&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2353,"menu_order":53,"template":"","class_list":["post-2407","spl_knowledgebase","type-spl_knowledgebase","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>fWtoIEEE [D&gt;=21] - SPLat Controls<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"fWtoIEEE [D&gt;=21] - SPLat Controls\" \/>\n<meta property=\"og:description\" content=\"Converts the contents of W from SPLat floating point format to big endian IEEE-754 format. 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