Support memory operands to push in assembler

[tekknolagi]

No description provided.

[maximecb]

Nice. Glad you also added tests 👍

I use yasm to look at the bytes it produces for instructions and use that as reference. Here is a little script yasm.sh to print the output encoding bytes for some instruction:

echo "$*" > /tmp/test.s
yasm -o /dev/null -f elf64 -O2 -l /tmp/test.txt /tmp/test.s
cat /tmp/test.txt

eg:

> ./yasm.sh "push qword[R8 + 8*RCX + 3]"
     1                                 %line 1+1 /tmp/test.s
     2 00000000 41FF74C803             push qword[R8 + 8*RCX + 3]

I'm getting the same output you have here, so it looks good to me :)