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In a stack machine, the operands used in the instructions are always at a known offset (set in the stack pointer), from a fixed location (the bottom of the stack, which in a hardware design might always be at memory location zero), saving precious in-cache or in-CPU storage from being used to store quite so many memory addresses or index ...
Separate from the stack definition of a MISC architecture, is the MISC architecture being defined by the number of instructions supported. Typically a minimal instruction set computer is viewed as having 32 or fewer instructions, [1] [2] [3] where NOP, RESET, and CPUID type instructions are usually not counted by consensus due to their fundamental nature.
Machine code is generally different from bytecode (also known as p-code), which is either executed by an interpreter or itself compiled into machine code for faster (direct) execution. An exception is when a processor is designed to use a particular bytecode directly as its machine code, such as is the case with Java processors .
The 8087 (The floating point math coprocessor) is a stack machine, though. Added x87 as an example of hybrids between stack and register machines. DBSand 05:30, 1 April 2011 (UTC)DBSand Most stack machines are, infact two-stack machines. One for operands and one for loop counters.
The Burroughs Large Systems Group produced a family of large 48-bit mainframes using stack machine instruction sets with dense syllables. [NB 1] The first machine in the family was the B5000 in 1961, which was optimized for compiling ALGOL 60 programs extremely well, using single-pass compilers.
Walmart founder Sam Walton and his wife Helen, on their wedding day, February 14, 1943. At the time, Sam was a management trainee with the J.C. Penney Company. Photo: Courtesy of Walmart
However, it is possible to construct Turing complete machines using an instruction based on other arithmetic operations, e.g., addition. For example, one variation known as DLN (Decrement and jump if not zero) has only two operands and uses decrement as the base operation. For more information see Subleq derivative languages .
Ignite (formerly ShBoom and PSC 1000, stylized as IGNITE) is a two stack, stack machine reduced instruction set computer (RISC) microprocessor architecture. [1] The architecture was originally developed by Russell H. Fish III and Chuck H. Moore, Nanotronics, which was later acquired by Patriot Scientific Corporation. The processor is one of the ...