Encode bnot on x86.

2018-06-09 03:20:12 +03:00
parent a7813c4448
commit 399860e2aa
3 changed files with 20 additions and 0 deletions
--- a/lib/codegen/meta/isa/x86/encodings.py
+++ b/lib/codegen/meta/isa/x86/encodings.py
@@ -150,6 +150,9 @@ for inst,           opc in [
        (base.bxor, 0x31)]:
    enc_i32_i64(inst, r.rr, opc)

+# x86 has a bitwise not instruction NOT.
+enc_i32_i64(base.bnot, r.ur, 0xf7, rrr=2)
+
 # Also add a `b1` encodings for the logic instructions.
 # TODO: Should this be done with 8-bit instructions? It would improve
 # partial register dependencies.