Add Intel regmove encodings.

Same as a register copy, but different arguments.

lib/cretonne/meta/isa/intel/encodings.py

@@ -23,11 +23,15 @@ for inst,           opc in [
     I64.enc(inst.i32, *r.rr(opc))
 
 I32.enc(base.copy.i32, *r.ur(0x89))
-
 I64.enc(base.copy.i64, *r.ur.rex(0x89, w=1))
 I64.enc(base.copy.i32, *r.ur.rex(0x89))
 I64.enc(base.copy.i32, *r.ur(0x89))
 
+I32.enc(base.regmove.i32, *r.rmov(0x89))
+I64.enc(base.regmove.i64, *r.rmov.rex(0x89, w=1))
+I64.enc(base.regmove.i32, *r.rmov.rex(0x89))
+I64.enc(base.regmove.i32, *r.rmov(0x89))
+
 # Immediate instructions with sign-extended 8-bit and 32-bit immediate.
 for inst,               rrr in [
         (base.iadd_imm, 0),

lib/cretonne/meta/isa/intel/recipes.py

@@ -6,6 +6,7 @@ from cdsl.isa import EncRecipe
 from cdsl.predicates import IsSignedInt, IsEqual
 from base.formats import Unary, UnaryImm, Binary, BinaryImm, MultiAry
 from base.formats import Call, IndirectCall, Store, Load
+from base.formats import RegMove
 from .registers import GPR, ABCD
 
 try:
@@ -205,6 +206,14 @@ ur = TailRecipe(
         modrm_rr(out_reg0, in_reg0, sink);
         ''')
 
+# XX /r, for regmove instructions.
+rmov = TailRecipe(
+        'ur', RegMove, size=1, ins=GPR, outs=(),
+        emit='''
+        PUT_OP(bits, rex2(dst, src), sink);
+        modrm_rr(dst, src, sink);
+        ''')
+
 # XX /n with one arg in %rcx, for shifts.
 rc = TailRecipe(
         'rc', Binary, size=1, ins=(GPR, GPR.rcx), outs=0,