{"id":17942,"date":"2024-10-26T14:19:29","date_gmt":"2024-10-26T14:19:29","guid":{"rendered":"http:\/\/www.max-sperling.bplaced.net\/?p=17942"},"modified":"2025-08-29T14:00:23","modified_gmt":"2025-08-29T14:00:23","slug":"registers","status":"publish","type":"post","link":"http:\/\/www.max-sperling.bplaced.net\/?p=17942","title":{"rendered":"Registers"},"content":{"rendered":"

Overview<\/h2>\n

The registers are the fastest accessible memory for the CPU. Normally, each core of a CPU has its own set of registers. The most used architectures are x86-32, x86-64 (for Desktop PC’s) and A32, A64 (for Embedded Devices).<\/p>\n\n\n\n\n\n\n\n\n\n\n
Instruction Set<\/th>\nx86-16<\/th>\nx86-32<\/th>\nAMD64\/x86-64<\/th>\nA32<\/th>\nA64<\/th>\n<\/tr>\n
General Purpose<\/td>\nAX – DX, SI, DI<\/td>\nEAX – EDX, ESI, EDI<\/td>\nRAX – RDX, RSI, RDI, R8 – R15<\/td>\nR0 – R10<\/td>\nX0 – X15, X18 – X28<\/td>\n<\/tr>\n
Segment Register<\/td>\nCS, DS, SS, ES<\/td>\nCS, DS, SS, ES, FS, GS<\/td>\nCS, DS, SS, ES, FS, GS<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
Base Ptr. \/
Frame Ptr.<\/td>\n		BP<\/td>\nEBP<\/td>\nRBP<\/td>\nR11 (FP)<\/td>\nX29 (FP)<\/td>\n<\/tr>\n
Intra Procedure<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\nR12<\/td>\nX16, X17<\/td>\n<\/tr>\n
Stack Pointer<\/td>\nSP<\/td>\nESP<\/td>\nRSP<\/td>\nR13 (SP)<\/td>\nSP<\/td>\n<\/tr>\n
Link Register<\/td>\n–<\/td>\n–<\/td>\n–<\/td>\nR14 (LR)<\/td>\nX30 (LR)<\/td>\n<\/tr>\n
Instr. Ptr. \/
Progr. Counter<\/td>\n		IP<\/td>\nEIP<\/td>\nRIP<\/td>\nR15 (PC)<\/td>\nPC<\/td>\n<\/tr>\n
Manufacturer<\/th>\nIntel<\/th>\nAMD\/Intel<\/th>\nARM<\/th>\n<\/tr>\n<\/table>\n
\n

AMD\/Intel<\/h2>\n
\r\n00     07      15              31              48              63\r\n |-----------------------------RAX-----------------------------| 64 Bits\r\n |--------------EAX-------------|                                32 Bits\r\n |------AX------|                                                16 Bits\r\n |--AL--||--AH--|                                                 8 Bits\r\n<\/pre>\n
\r\n00     07      15              31              48              63\r\n |-----------------------------R8------------------------------| 64 Bits\r\n |--------------R8d-------------|                                32 Bits\r\n |------R8w-----|                                                16 Bits\r\n |-R8b--|                                                         8 Bits\r\n<\/pre>\n
\n
ARM<\/h2>\n
Why is ARM using a link register (LR)?<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The registers are the fastest accessible memory for the CPU. Normally, each core of a CPU has its own<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false},"categories":[83],"tags":[],"_links":{"self":[{"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/posts\/17942"}],"collection":[{"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=17942"}],"version-history":[{"count":12,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/posts\/17942\/revisions"}],"predecessor-version":[{"id":19121,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/posts\/17942\/revisions\/19121"}],"wp:attachment":[{"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=17942"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=17942"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=17942"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}