What is a x86 register?
The main tools to write programs in x86 assembly are the processor registers. The registers are like variables built in the processor. Using registers instead of memory to store values makes the process faster and cleaner.
How many registers does x86 have?
The x86 architecture has 8 General-Purpose Registers (GPR), 6 Segment Registers, 1 Flags Register and an Instruction Pointer. 64-bit x86 has additional registers.
What are the 32-bit registers?
There are 8 32-bit registers: eax, ebx, ecx, edx, esi, edi, ebp, esp. There are 8 16-bit registers: ax, bx, cx, dx, si, di, bp, sp. There are 8 8-bit registers: ah, al, bh, bl, ch, cl, dh, dl.
How many registers does a x86 64 processor have?
x86-64 has a total of 6 segment registers: CS , SS , DS , ES , FS , and GS . The operation varies with the CPU’s mode: In all modes except for long mode, each segment register holds a selector, which indexes into either the GDT or LDT.
How many registers are there in MIPS?
32
MIPS has 32 floating-point registers.
What is AX BX CX DX registers?
AX, BX, CX, and DX are general purpose registers. They can be assigned to any value you want. Of course you need to adjust it into your need. AX is usually called accumulator register, or just accumulator. Most of arithmatical operations are done with AX.
How many registers are there in modern CPU?
Why does a processor have 32 registers? – Computer Science Stack Exchange.
What is BX ax Al and CX register?
For example, in multiplication operation, one operand is stored in EAX or AX or AL register according to the size of the operand. BX is known as the base register, as it could be used in indexed addressing. CX is known as the count register, as the ECX, CX registers store the loop count in iterative operations.
What does the Z flag do?
Along with a carry flag, a sign flag and an overflow flag, the zero flag is used to check the result of an arithmetic operation, including bitwise logical instructions. It is set to 1, or true, if an arithmetic result is zero, and reset otherwise.