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IA-64 (Intel Itanium architecture) is the instruction set architecture (ISA) of the discontinued Itanium family of 64-bit Intel microprocessors.The basic ISA specification originated at Hewlett-Packard (HP), and was subsequently implemented by Intel in collaboration with HP.
Iowa Highway 64 (Iowa 64) is a 64-mile-long (103 km) state highway that runs through two counties in east central Iowa.It begins at an interchange with U.S. Route 151 (US 151) in Anamosa and ends at the Dale Gardner Veterans Memorial Bridge over the Mississippi River near Sabula.
Itanium (/ aɪ ˈ t eɪ n i ə m /; eye-TAY-nee-əm) is a discontinued family of 64-bit Intel microprocessors that implement the Intel Itanium architecture (formerly called IA-64). The Itanium architecture originated at Hewlett-Packard (HP), and was later jointly developed by HP and Intel.
reengineered P6-based microarchitecture used in Intel Core 2 and Xeon microprocessors, built on a 65 nm process, supporting x86-64 level SSE instruction and macro-op fusion and enhanced micro-op fusion with a wider front end and decoder, larger out-of-order core and renamed register, support loop stream detector and large shadow register file.
AMD64 (also variously referred to by AMD in their literature and documentation as “AMD 64-bit Technology” and “AMD x86-64 Architecture”) was created as an alternative to the radically different IA-64 architecture designed by Intel and Hewlett-Packard, which was backward-incompatible with IA-32, the 32-bit version of the x86 architecture.
The use of predication is essential in IA-64's implementation of software pipelining because it avoids the need for writing separated code for prologs and epilogs. [clarification needed] In the x86 architecture, a family of conditional move instructions (CMOV and FCMOV) were added to the architecture by the Intel Pentium Pro (1995) processor.
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Similarly, the IA-64 (Itanium) architecture used variable-sized windows, with 32 global registers and 96 for the windows. In the Infineon C166 architecture, most registers are simply locations in internal RAM which have the additional property of being accessible as registers.