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3 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen
87c5f27ff7 Intel encodings for trap. 
Use a ud2 instruction which generates an undefined instruction
exception.
 2017-07-19 15:01:32 -07:00
Jakob Stoklund Olesen
c9bbc1e86e Don't require that the fallthrough instruction has an encoding. 
A fallthrough jump is actually represented as 0 bytes, so no encoding is
needed.

Also allow for unencoded instructions in the generated emit_inst
implementations. The verifier has stricter rules for when this is
allowed.
 2017-07-19 09:30:04 -07:00
Jakob Stoklund Olesen
efdbf0d735 Add Intel encodings for jump and branch instructions. 
Just implement jump, brz, and brnz as needed for WebAssembly.
 2017-07-19 09:15:19 -07:00