x86
faimily o backward compatible instruction set airchitecturs based on the Intel 8086 CPU an its Intel 8088 variant
x86 is a faimily o backward compatible instruction set airchitecturs[a] based on the Intel 8086 CPU an its Intel 8088 variant.
Designer | Intel, AMD |
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Bits | 16-bit, 32-bit an 64-bit |
Introduced | 1978 (16-bit), 1985 (32-bit), 2003 (64-bit) |
Design | CISC |
Teep | Register-memory |
Encodin | Variable (1 tae 15 bytes) |
Brainchin | Status register |
Endianness | Little |
Page size | 8086–i286: None i386, i486: 4 KB pages P5 Pentium: addit 4 MB pages (Legacy PAE: 4 KB→2 MB) x86-64: addit 1 GB pages |
Extensions | x87, IA-32, MMX, SSE, SSE2, x86-64, SSE3, SSSE3, SSE4, SSE5, AVX |
Appen | Pairtly. For some advanced featurs, x86 mey require license frae Intel; x86-64 mey require an addeetional license frae AMD. The 80486 processor haes been on the mercat for mair nor 20 years[1] an so cannot be subject tae patent claims. The pre-586 subset o the x86 airchitectur is tharefore fully open. |
Registers | |
General purpose |
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Floatin pynt |
Notes
eedit- ↑ Unlik the microairchitectur (an speceefic electronic an phesical implementation) uised for a speceefic microprocessor design
References
eedit- ↑ Pryce, Dave (11 Mey 1989). "80486 32-bit CPU breaks new ground in chip density and operating performance. (Intel Corp.) (product announcement) EDN" (Press release).