Rename the 'cretonne' crate to 'cretonne-codegen'.

This fixes the next part of #287.

lib/codegen/src/isa/arm64/mod.rs

@@ -0,0 +1,111 @@
+//! ARM 64-bit Instruction Set Architecture.
+
+mod abi;
+mod binemit;
+mod enc_tables;
+mod registers;
+pub mod settings;
+
+use super::super::settings as shared_settings;
+use binemit::{emit_function, CodeSink, MemoryCodeSink};
+use ir;
+use isa::Builder as IsaBuilder;
+use isa::enc_tables::{lookup_enclist, Encodings};
+use isa::{EncInfo, RegClass, RegInfo, TargetIsa};
+use regalloc;
+use std::boxed::Box;
+use std::fmt;
+
+#[allow(dead_code)]
+struct Isa {
+    shared_flags: shared_settings::Flags,
+    isa_flags: settings::Flags,
+}
+
+/// Get an ISA builder for creating ARM64 targets.
+pub fn isa_builder() -> IsaBuilder {
+    IsaBuilder {
+        setup: settings::builder(),
+        constructor: isa_constructor,
+    }
+}
+
+fn isa_constructor(
+    shared_flags: shared_settings::Flags,
+    builder: &shared_settings::Builder,
+) -> Box<TargetIsa> {
+    Box::new(Isa {
+        isa_flags: settings::Flags::new(&shared_flags, builder),
+        shared_flags,
+    })
+}
+
+impl TargetIsa for Isa {
+    fn name(&self) -> &'static str {
+        "arm64"
+    }
+
+    fn flags(&self) -> &shared_settings::Flags {
+        &self.shared_flags
+    }
+
+    fn register_info(&self) -> RegInfo {
+        registers::INFO.clone()
+    }
+
+    fn encoding_info(&self) -> EncInfo {
+        enc_tables::INFO.clone()
+    }
+
+    fn legal_encodings<'a>(
+        &'a self,
+        func: &'a ir::Function,
+        inst: &'a ir::InstructionData,
+        ctrl_typevar: ir::Type,
+    ) -> Encodings<'a> {
+        lookup_enclist(
+            ctrl_typevar,
+            inst,
+            func,
+            &enc_tables::LEVEL1_A64[..],
+            &enc_tables::LEVEL2[..],
+            &enc_tables::ENCLISTS[..],
+            &enc_tables::LEGALIZE_ACTIONS[..],
+            &enc_tables::RECIPE_PREDICATES[..],
+            &enc_tables::INST_PREDICATES[..],
+            self.isa_flags.predicate_view(),
+        )
+    }
+
+    fn legalize_signature(&self, sig: &mut ir::Signature, current: bool) {
+        abi::legalize_signature(sig, &self.shared_flags, current)
+    }
+
+    fn regclass_for_abi_type(&self, ty: ir::Type) -> RegClass {
+        abi::regclass_for_abi_type(ty)
+    }
+
+    fn allocatable_registers(&self, func: &ir::Function) -> regalloc::RegisterSet {
+        abi::allocatable_registers(func)
+    }
+
+    fn emit_inst(
+        &self,
+        func: &ir::Function,
+        inst: ir::Inst,
+        divert: &mut regalloc::RegDiversions,
+        sink: &mut CodeSink,
+    ) {
+        binemit::emit_inst(func, inst, divert, sink)
+    }
+
+    fn emit_function(&self, func: &ir::Function, sink: &mut MemoryCodeSink) {
+        emit_function(func, binemit::emit_inst, sink)
+    }
+}
+
+impl fmt::Display for Isa {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}\n{}", self.shared_flags, self.isa_flags)
+    }
+}