EAX x86 Register: Meaning and History, x86-64 In 2003 AMD effectively takes over the architectural leadership and introduces the first 64-bit processor in the x86 lineage. In legacy mode, it is backward-compatible down to 8086. The eight main registers are extended to 64 bits. The extended registersRMoving x86 assembly to 64, Transitioning assembly code from x86 to x86-64 is pretty straightforward, but there are some changes worth noting. Full 64-bit registers are prefixed with r. So for 64-bit operations, you use rax rather than eax, rdi rather than edi and so forth. The 8 new integer.X86 Assembly/SSE, · Originally, an SSE register could only be used as four 32-bit single precision floating point numbers (the equivalent of a float in C). SSE2 expanded the capabilities of the XMM registers, so they can now be used as: 2 64-bit floating points (double precision) 2 64x86, · A 64 bit x86 Linux machine, like NetRun: Call nasm like: nasm -f elf64 yourCode.asm Function parameters go in registers rdi, rsi, rdx, rcx, r8, and r9. Any additional parameters get pushed on the stack. OS X in 64 bit uses the same parameter scheme.X86 Assembly/Shift and Rotate, · They are available for use with 16- and 32-bit data entities (registers/memory locations). The src operand is always a register, the dest operand can be a register or memory location, the cnt operand is an immediate byte value or the CL register. In 64-bit mode it.
X86 Assembly/NASM Syntax, · The Netwide Assembler is an x86 and x86-64 assembler that uses syntax similar to Intel. It supports a variety of object file formats, including: ELF32/64 Linux a.out NetBSD/FreeBSD a.out MS-DOS 16-bit/32-bit object files Win32/64 object files COFF Mach-O 32/64SSE, · X86-64 adds 8 SSE registers (xmm8 - xmm15) to the mix. However, you can only access these in 64 bit mode. Advanced Vector Extensions is a SIMD (Single Instruction, Multiple Data) instruction set introduced by Intel in 2011.21.3. Registers, X86 Assembly/X86 Architecture - Wikibooks, open books for ...GitHub, · Rust library to use x86 (amd64) specific functionality and registers. - gz/rust-x86 x86 / amd64 library Library to program x86 (amd64) hardware. Contains x86 specific data structure descriptions, data-tables, as well as convenience function to call assembly