AMD 64 Information

• The AMD64 overview class handout

• The AMD suite of documentation is divided into five volumes. Most important are probably
  Volume 1 gives an overview of the machine focused on application programming
  Volume 3 describes the integer-unit instructions
  Volume 4 describes the floating-point instructions (both in the multimedia unit and the extended-precision floating-point unit)

• The System V ABI for AMD64 describes register usage and calling conventions.

• From the manuals above I have extracted short excerpts I think are especially useful:
  Names of registers and parts thereof
  Table of register usage
  Sizes of standard data types
  Implicitly modified registers
  Conditional-jump instructions
  Conditional-move instructions
  Full-length description of the calling convention
  I have also bundled these excerpts into a single PDF.

• Architecture manuals are also available from Intel. I find the Intel manuals a bit harder to read, but they do have all the instructions in simple alphabetical order (in two volumes). This has the advantage that if you open both manual in Adobe reader you can quickly look up an instruction using the alphabetical table of contents.

• A friendly software developer put up this table of register usage (including calling convention) for AMD64

Here are some commonly used addressing modes:

%rax                     == $r[0]   # similarly for other registers
%eax                     == least significant 32 bits of %rax
                            (presence may signal a 32-bit operation)
disp(base, index, scale) == $m[base + index * scale + disp]
disp(base)               == $m[base + disp]
label(,index,scale)      == $m[label + index * scale]
symbol(%rip)             == relative reference to symbol in memory

Opcode suffixes are used to indicate the size of a memory operation. They are:

byte	b	8 bits
word	w	16 bits
long, double	l,d	32 bits
quadword	q	64 bits