I met a puzzle when I work with my amd64 box. When I observe a stream slab of 2048 sizes, the "buf in use", "buf total" and "memory in use" seems to mean different thing between 32/64 bit kernels. I allocated mbuf of 1600 bytes, In 64-bit mode, the cache name of 2048 shou...
> 32-bit and 64-bit systems. > Hi Jonathan, I have a question about your comments above: Raymond have told me he already set the kmem_flags = 0xf in the system, why the kmem cache debug flags are still different between 32bit and 64bit kernel? The kmem_flags setting should be effe...
(32位:8个通用寄存器,包括EBP和ESP)64-bit: 16 GPRs, including RBP and RSP(64位:16个通用寄存器,包括RBP和RSP) Floating point(浮点运算) 16-bit: optional separate x87 FPU(16位:可选的独立x87浮点单元)32-bit: optional separate or integrated x87 FPU, integrated SSE units in later processors(...
(1, 2, 4 or 8 bytes, if required) Registers The registers are encoded using the 4-bit values in the X.Reg column of the following table.X.Regis in binary. X.Reg8-bit GP16-bit GP32-bit GP64-bit GP80-bit x8764-bit MMX128-bit XMM256-bit YMM16-bit Segment32-bit Control32-bit...
复杂,比如想根据平台不同可选择不同的安装文件,运行在x86平台上的Windows 32bit OS只能安装32bit文件,而运行在x64平台上的Windows 64bit OS则可以选择安装32bit或64bit(x64),但是运行在x64平台上的Windows 32bit OS又只能安装32bit了,最后,运行在IA64平台上的Windows 64bit则可以选择安装32bit和64bit(IA64)...
qword: 64 bits (includes floating-point doubles) tword: 80 bits (includes floating-point extended doubles) oword: 128 bits Notation The following table indicates the notation used to describe assembly language instructions. NotationMeaning r,r1,r2... ...
This littlextrick often makes programs shorter, because adding small-value constants to 16 or 32 bit operands is very common. The third difference between theADD-immediate and the standardADDinstruction is the meaning of theREGfield in theMOD-REG-R/Mbyte: ...
eax 寄存器用于函数结果的<=32位的返回值。如果结果是64为的,那么如果储存在 edx:eax 寄存器对中。 下面是 x86 体系架构的调用约定项: Win32( __stdcall ) 函数的参数是通过从右向左的传入栈中,并且是在被调用函数(callee)中清理栈的。 C++内置的方法调用(大家了解的:thiscall) 函数参数也是从右向左传入栈...
What is x64 architecture? Similar to the x86, the x64, which is also called "x86-64" ( meaning x86-based 64-bit) is also a family of instruction set architecture for computer processors. But, x64 has 64-bit CPUs and an operating system rather than the 32-bit system which belongs ...
Possible operand types and their instruction suffixes are: Chapter 2 • Solaris x86 Assembly Language Syntax 17 Instructions, Operands, and Addressing b Byte (8–bit) w Word (16–bit) l Long (32–bit) (default) q Quadword (64–bit) The assembler recognizes the following suffixes for x87...