src/arch/x86_64/CodeGen.zig   | 485 ++++++++++++++++++++++++++------
 src/arch/x86_64/Encoding.zig  |   4 +-
 src/arch/x86_64/Lower.zig     |  14 +-
 src/arch/x86_64/Mir.zig       |  16 +-
 src/arch/x86_64/encodings.zig |  13 +
 test/behavior/select.zig      |   4 +-
 6 files changed, 443 insertions(+), 93 deletions(-)