哪位有AT＆T指令手册啊

xiongce

看LINUX内核 碰到很多这类指令
像btsl btrl 都不大理解 想找个手册好对着看

mik

请在置顶的 [CPU与编译器]版 资源贴里找。

xiongce

原帖由 mik 于 2007-5-31 09:46 发表于 2楼  
请在置顶的 版 资源贴里找。

这里的进去都是E文的，偶的英文不大好不知道哪个才是
希望版主辛苦点 帮忙选个

mik

  看不到3楼的吗？

Linux Assembly

http://asm.sourceforge.net/


看不懂E文，实在没办法了，你想有中文的，可没那么容易找

xiongce

没有这种

("btsl %1,%2:"0" (0),"r" (nr),"m" (*(addr)));

然后再解释btsl干了什么 同时影响了哪些标志位（REG）

mik

原帖由 xiongce 于 2007-5-31 10:23 发表于 5楼  
没有这种

("btsl %1,%2:"0" (0),"r" (nr),"m" (*(addr)));

然后再解释btsl干了什么 同时影响了哪些标志位（REG）

我劝你还是看看 Intel  手册吧

mik

BTS         ---- Bit Test And Set

Copies a bit, specified by bit index in a register or 8-bit immediate value (second operand), from a bit
string (first operand), also called the bit base, to the carry flag (CF) of the rFLAGS register, and then
sets the bit in the bit string to 1.
If the bit base operand is a register, the instruction uses the modulo 16, 32, or 64 (depending on the
operand size) of the bit index to select a bit in the register.
If the bit base operand is a memory location, bit 0 of the byte at the specified address is the bit base of
the bit string. If the bit index is in a register, the instruction selects a bit position relative to the bit base
in the range –263 to +263 – 1 if the operand size is 64, –231 to +231 – 1, if the operand size is 32, and
–215 to +215 – 1 if the operand size is 16. If the bit index is in an immediate value, the bit selected is
that value modulo 16, 32, or 64, depending on the operand size.

mik

再解释一下吧：

btsl $8, %eax

将 %eax 的第 BIT8 复制到 CF 标志位，然后将 %eax 的 BIT8 置为 1 。
只影响 CF 标志位，其它标志位未定义。

xiongce

400多的E文手册 实在不是短期内能消化的啊
有没有中文版的 下载地址阿