Search results
Results from the WOW.Com Content Network
To save a value to the stack, the PUSH instruction is used. To retrieve a value from the stack, the POP instruction is used. Example: Assuming that SS = 1000h and SP = 0xF820. This means that current stack top is the physical address 0x1F820 (this is due to memory segmentation in 8086). The next two machine instructions of the program are:
Base instruction 0xFE 0x02 cgt: Push 1 (of type int32) if value1 greater than value2, else push 0. Base instruction 0xFE 0x03 cgt.un: Push 1 (of type int32) if value1 greater than value2, unsigned or unordered, else push 0. Base instruction 0xC3 ckfinite: Throw ArithmeticException if value is not a finite number. Base instruction 0xFE 0x04 clt ...
PDFedit is a free PDF editor for Unix-like operating systems (including Cygwin on top of Windows). It does not support editing protected or encrypted PDF files or word processor-style text manipulation, however. [1] PDFedit GUI is based on the Qt 3 toolkit and scripting engine , so every operation is scriptable.
Below is the full 8086/8088 instruction set of Intel (81 instructions total). [2] 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 x86 instruction set has several times been extended with SIMD (Single instruction, multiple data) instruction set extensions.These extensions, starting from the MMX instruction set extension introduced with Pentium MMX in 1997, typically define sets of wide registers and instructions that subdivide these registers into fixed-size lanes and perform a computation for each lane in parallel.
r15: Program counter (as per the instruction set specification). r14: Link register. The BL instruction, used in a subroutine call, stores the return address in this register. r13: Stack pointer. The Push/Pop instructions in "Thumb" operating mode use this register only. r12: Intra-Procedure-call scratch register. r4 to r11: Local variables.
x86-64 (also known as x64, x86_64, AMD64, and Intel 64) [note 1] is a 64-bit extension of the x86 instruction set architecture first announced in 1999. It introduces two new operating modes: 64-bit mode and compatibility mode, along with a new four-level paging mechanism.
Peephole optimization is an optimization technique performed on a small set of compiler-generated instructions, known as a peephole or window, [1] [2] that involves replacing the instructions with a logically equivalent set that has better performance. For example: