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The DEC VAX supported operations on 128-bit integer ('O' or octaword) and 128-bit floating-point ('H-float' or HFLOAT) datatypes. Support for such operations was an upgrade option rather than being a standard feature. Since the VAX's registers were 32 bits wide, a 128-bit operation used four consecutive registers or four longwords in memory.
Wrap a 256-bit AES key from XMM1:XMM0 into a 512-bit key handle - and output this handle to XMM0-3. AESENC128KL xmm,m384: F3 0F 38 DC /r: Encrypt xmm using 128-bit AES key indicated by handle at m384 and store result in xmm. [c] AESDEC128KL xmm,m384: F3 0F 38 DD /r: Decrypt xmm using 128-bit AES key indicated by handle at m384 and store result ...
The FMA instruction set is an extension to the 128 and 256-bit Streaming SIMD Extensions instructions in the x86 microprocessor instruction set to perform fused multiply–add (FMA) operations. [1] There are two variants: FMA4 is supported in AMD processors starting with the Bulldozer architecture. FMA4 was performed in hardware before FMA3 was.
Will change OperandSize from 16-bit to 32-bit if CS.D=0, or from 32-bit to 16-bit if CS.D=1. 67h: AddressSize override. Will change AddressSize from 16-bit to 32-bit if CS.D=0, or from 32-bit to 16-bit if CS.D=1. The 80386 also introduced the two new segment registers FS and GS as well as the x86 control, debug and test registers.
In computing, Streaming SIMD Extensions (SSE) is a single instruction, multiple data instruction set extension to the x86 architecture, designed by Intel and introduced in 1999 in its Pentium III series of central processing units (CPUs) shortly after the appearance of Advanced Micro Devices (AMD's) 3DNow!.
Certain algorithms that rely on having a fixed number of bits in the significand can fail when using 128-bit long double numbers. Because of the reason above, it is possible to represent values like 1 + 2 −1074 , which is the smallest representable number greater than 1.
2.8–3.8 GHz (model numbers 6x0) Introduced February 20, 2005; Same features as Prescott with the addition of: 2 MB cache; Intel 64-bit; Enhanced Intel SpeedStep Technology (EIST) Cedar Mill built on 0.065 μm process technology; 3.0–3.6 GHz (model numbers 6x1) Introduced January 16, 2006; Die shrink of Prescott-2M; Same features as Prescott-2M
There is no 128-bit version, but the same effect can be simply achieved using VINSERTF128. VPBROADCASTB, VPBROADCASTW, VPBROADCASTD, VPBROADCASTQ: Copy an 8, 16, 32 or 64-bit integer register or memory operand to all elements of a XMM or YMM vector register. VBROADCASTI128: Copy a 128-bit memory operand to all elements of a YMM vector register.