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A user with permissions to read and/or write to this file can use the file I/O API to access these registers. The msr-tools [ 6 ] package provides a reference implementation. Documentation regarding which MSRs a certain processor implementation supports is usually found in the processor documentation of the CPU vendor.
AMD K6-2 – an improved K6 with the addition of the 3DNow! SIMD instructions. AMD K6-III Sharptooth – a further improved K6 with three levels of cache – 64 KB L1, 256 KB full-speed on-die L2, and a variable (up to 2 MB) L3. AMD K7 Athlon – microarchitecture of the AMD Athlon classic and Athlon XP microprocessors. Was a very advanced ...
1.1 AMD IP x86 CPUs. 1.2 APUs. ... Download as PDF; Printable version; In other projects ... Summit Ridge Ryzen 1000 series (desktop)
The four-operand form (FMA4) allows a, b, c and d to be four different registers, while the three-operand form (FMA3) requires that d be the same register as a, b or c. The three-operand form makes the code shorter and the hardware implementation slightly simpler, while the four-operand form provides more programming flexibility.
8086/8088 datasheet documents only base 10 version of the AAD instruction (opcode 0xD5 0x0A), but any other base will work. Later Intel's documentation has the generic form too. NEC V20 and V30 (and possibly other NEC V-series CPUs) always use base 10, and ignore the argument, causing a number of incompatibilities: 0xD5: AAM
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The architecture was used in later AMD chips such as the K6, and to an extent most x86 processors today implement a "hybrid" architecture similar to those used in NexGen's processors. It went public in 1994, and was bought by AMD in 1995 for $850M. The technology forms the platform architecture for all of AMD's current microprocessors.
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