I just found a strange instruction by assembling (with
gas) and disassembling (with
objdump) on a
amd64 assembly code is:
mov 0x89abcdef, %al
gas compiled it (I am using the following command line:
gcc -m64 -march=i686 -c -o myobjectfile myassemblycode.s),
objdump gives the following code:
a0 df ce ab 89 00 00 movabs 0x89abcdef, %al
My problem is that I cannot find any
movab in the Intel assembly manual (not even a
So, I am dreaming ? What is the meaning of this instruction ? My guess is that it is a quirks from the GNU binutils, but I am not sure of it.
PS: I checked precisely the spelling of this instruction, so it is NOT a
movaps instruction for sure.