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AMD has not used K-nomenclature codenames in official AMD documents and press releases since the beginning of 2005, when K8 described the Athlon 64 processor family. AMD now refers to the codename K8 processors as the Family 0Fh processors. 10h and 0Fh refer to the main result of the CPUID x86 processor instruction.
AMD was the first to introduce the instructions that now form Intel's BMI1 as part of its ABM (Advanced Bit Manipulation) instruction set, then later added support for Intel's new BMI2 instructions. AMD today advertises the availability of these features via Intel's BMI1 and BMI2 cpuflags and instructs programmers to target them accordingly. [2]
The x86 instruction set has several times been extended with SIMD (Single instruction, multiple data) instruction set extensions.These extensions, starting from the MMX instruction set extension introduced with Pentium MMX in 1997, typically define sets of wide registers and instructions that subdivide these registers into fixed-size lanes and perform a computation for each lane in parallel.
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AMD introduced TBM together with BMI1 in its Piledriver [27] line of processors; later AMD Jaguar and Zen-based processors do not support TBM. [28] No Intel processors (as of 2023) support TBM. The TBM instructions are all encoded using the XOP prefix. They are all available in 32-bit and 64-bit forms, selected with the XOP.W bit (0=32bit, 1 ...
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.
Move from general register to x86 debug register. [k] On Pentium and later processors, moves to the DR0-DR7 debug registers are serializing. MOV reg,TRx: 0F 24 /r [j] Move from x86 test register to general register. [n] MOV TRx,reg: 0F 26 /r [j] Move from general register to x86 test register. [n] ICEBP, INT01, INT1 [o] F1: In-circuit emulation ...
AMD K6: 1997 6 Superscalar, branch prediction, speculative execution, out-of-order execution, register renaming [b] AMD K6-III: 1999 Branch prediction, speculative execution, out-of-order execution [1] AMD K7: 1999 Out-of-order execution, branch prediction, Harvard architecture: AMD K8: 2003 64-bit, integrated memory controller, 16 byte ...
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