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The MACRO-32 assembler and linker were bundled with the operating system. To port VMS to the DEC Alpha , VAX MACRO was implemented for the Alpha architecture. Since the Alpha used a different instruction set than the VAX, MACRO-32 was implemented as a compiler , compiling VAX assembly language into Alpha instructions.
In most real-world examples, compressed instructions are 16 bits long in a processor that would otherwise use 32-bit instructions. The 16-bit ISA is a subset of the full 32-bit ISA, not a separate instruction set. The smaller format requires some tradeoffs: generally, there are fewer instructions available, and fewer processor registers can be ...
This adds a few new instructions (skip on byte without inc/decrement, subtract immediate with carry, ROM read with address increment), but also adds 2-word "long" variants of all memory instructions. When bit 15 of the opcode is set, it indicates that the 8-bit operand address in opcode bits 0–6 and 14 is extended to 16 bits using bits 0–7 ...
These instructions are also available in 32-bit mode, in which they operate on 32-bit registers (eax, ebx, etc.) and values instead of their 16-bit (ax, bx, etc.) counterparts. The updated instruction set is grouped according to architecture ( i186 , i286 , i386 , i486 , i586 / i686 ) and is referred to as (32-bit) x86 and (64-bit) x86-64 (also ...
The accumulator has two overflow bits, labelled Q and P. Logical instructions clear or ignore S and Q; the Add and Carry Logical (ACL) instruction does an end-around carry from bit P to bit 35. The Index registers operate using two's complement format and when used to modify an instruction address are subtracted from the address in the instruction.
“RuPaul’s Drag Race UK” winner James Lee Williams, better known by their stage name The Vivienne, has died. They were 32. Williams’ death was confirmed by their manager Simon Jones, who ...
Robey said the actual payout was capped at $450,000, of which $250,000 went to the lawyers who brought the case. The remaining $200,000 was split among the 200-odd employees in the class action ...
Micro-ops Fusion of certain sub-instructions mediated by decoding units. x86 commands can result in fewer micro-operations and thus require fewer processor cycles to complete. The Pentium M was the most power efficient x86 processor for notebooks for several years, consuming a maximum of 27 watts at maximum load and 4-5 watts while idle.