where can I find a description of *all* MIPS instructions

Does anyone know of a web site where I can find a list of 32-bit MIPS instructions/opcodes, with the following features:

• Clearly distinguishes between real opcodes and assembly-language macros (pseudo-instructions)
• Describes the instruction behavior including differences depending on privilege level.
• Indicates in which instruction set revision the instruction was introduced/revised (e.g. MIPS I, MIPS II, MIPS32, etc.)
• Includes privileged instructions such as syscall.

I am aware of numerous web sites which document "part of" the instruction set, mostly for teaching purposes. They tend to leave out or only partially describe floating-point and privileged instructions.

In case you're wondering, I'm looking at Verilog code for a MIPS processor subset, and trying to figure out exactly to what extent it complies with the instruction sets of any real MIPS processors!