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The endianness of the 32-bit SPARC V8 architecture is purely big-endian. The 64-bit SPARC V9 architecture uses big-endian instructions, but can access data in either big-endian or little-endian byte order, chosen either at the application instruction (load–store) level or at the memory page level (via an MMU setting). The latter is often used ...
SPARC (sparc) SPARC (32-bit): LEON; UltraSPARC (64-bit): Sun Ultra series; Sun Blade; Sun Fire; SPARC Enterprise systems, also the based on the UltraSPARC T1, UltraSPARC T2, UltraSPARC T3, and UltraSPARC T4 processors; Sunway [citation needed] SuperH (sh) Sega Dreamcast (SuperH SH4) HP Jornada 680 through Jlime distribution (SuperH SH3)
For instance, the 32-bit desktop-oriented PowerPC processors in little-endian mode act as little-endian from the point of view of the executing programs, but they require the motherboard to perform a 64-bit swap across all 8 byte lanes to ensure that the little-endian view of things will apply to I/O devices. In the absence of this unusual ...
The integer register file has 32 64-bit entries. As the SPARC ISA uses register windows , of which the UltraSPARC has eight, the actual number of registers is 144. The register file has seven read and three write ports.
OpenSPARC is an open-source hardware project, started in December 2005, for CPUs implementing the SPARC instruction architecture. The initial contribution to the project was Sun Microsystems' register-transfer level (RTL) Verilog code for a full 64-bit, 32-thread microprocessor, the UltraSPARC T1 processor.
VIS re-uses existing SPARC V9 64-bit floating point registers to hold multiple 8, 16, or 32-bit integer values. In this respect, VIS is more similar to the design of MMX than other SIMD architectures such as SSE/SSE2/AltiVec. VIS includes a number of operations primarily for graphics support, so most of them are only for integers.
An instruction set architecture (ISA) is an abstract model of a computer, also referred to as computer architecture.A realization of an ISA is called an implementation.An ISA permits multiple implementations that may vary in performance, physical size, and monetary cost (among other things); because the ISA serves as the interface between software and hardware.
The instruction cache has a capacity of 32 KB. The data cache has a capacity of 64 KB and is four-way set-associative with a 32-byte cache line. The external L2 cache has a maximum capacity of 8 MB. It is accessed via a dedicated 256-bit bus operating at up 200 MHz for a peak bandwidth of 6.4 GB/s.