From f1d19b06d14e8fc22915e8e100b5df396f155fe3 Mon Sep 17 00:00:00 2001
From: SimplyTheOther <simplytheother@gmail.com>
Date: Wed, 17 Jun 2020 14:26:42 +0800
Subject: Added CR16 target hook (or provisional one at least)

---
 gcc/config.gcc                |  1 +
 gcc/config/cr16/cr16-protos.h |  3 +++
 gcc/config/cr16/cr16-rust.c   | 54 +++++++++++++++++++++++++++++++++++++++++++
 gcc/config/cr16/cr16.h        |  2 ++
 gcc/config/cr16/t-cr16        |  3 +++
 5 files changed, 63 insertions(+)
 create mode 100644 gcc/config/cr16/cr16-rust.c

(limited to 'gcc')

diff --git a/gcc/config.gcc b/gcc/config.gcc
index c5c9d8a..f564320 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -1529,6 +1529,7 @@ cr16-*-elf)
         tm_file="elfos.h ${tm_file} newlib-stdint.h"
         tmake_file="${tmake_file} cr16/t-cr16 "
         use_collect2=no
+		rust_target_objs="cr16-rust.o"
         ;;
 cris-*-elf | cris-*-none)
 	tm_file="dbxelf.h elfos.h newlib-stdint.h ${tm_file}"
diff --git a/gcc/config/cr16/cr16-protos.h b/gcc/config/cr16/cr16-protos.h
index 6ebc0b3..00fa0aa 100644
--- a/gcc/config/cr16/cr16-protos.h
+++ b/gcc/config/cr16/cr16-protos.h
@@ -45,6 +45,9 @@ enum data_model_type
   ILLEGAL_DM		/* Illegal data model.  */
 };
 
+/* Defined in cr16-rust.c  */
+extern void cr16_rust_target_cpu_info (void);
+
 #ifdef RTX_CODE
 
 /* Addressing Modes.  */
diff --git a/gcc/config/cr16/cr16-rust.c b/gcc/config/cr16/cr16-rust.c
new file mode 100644
index 0000000..3b9efe3
--- /dev/null
+++ b/gcc/config/cr16/cr16-rust.c
@@ -0,0 +1,54 @@
+/* Subroutines for the Rust front end on the CR16 architecture.
+   Copyright (C) 2020 Free Software Foundation, Inc.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "tm_p.h"
+#include "rust/rust-target.h"
+#include "rust/rust-target-def.h"
+
+/* Implement TARGET_RUST_CPU_INFO for CR16 targets.  */
+
+void cr16_rust_target_cpu_info(void) {
+    rust_add_target_info("target_arch", "cr16");
+
+    // llvm seems to have no support for cr16 (nor historical support), so names are made up by me
+    // TODO: very subject to change
+    // TODO maybe put in sub-arches as features? idk
+    if (TARGET_BIT_OPS)
+        rust_add_target_info("target_feature", "bit-ops");
+    if (TARGET_MAC)
+        rust_add_target_info("target_feature", "mac");
+    if (TARGET_DEBUG_ADDR)
+        rust_add_target_info("target_feature", "debug-addr");
+    if (TARGET_INT32)
+        rust_add_target_info("target_feature", "int32");
+
+    if (CR16_TARGET_DATA_NEAR)             
+        rust_add_target_info("target_feature", "data-model-near");
+    if (CR16_TARGET_DATA_MEDIUM)           
+        rust_add_target_info("target_feature", "data-model-medium");
+    if (CR16_TARGET_DATA_FAR)              
+        rust_add_target_info("target_feature", "data-model-far");  
+    
+    if (TARGET_CR16C)
+        rust_add_target_info("target_feature", "cr16c");
+    if (TARGET_CR16CP)
+        rust_add_target_info("target_feature", "cr16cplus");
+}
diff --git a/gcc/config/cr16/cr16.h b/gcc/config/cr16/cr16.h
index 4af90bf..b90cce1 100644
--- a/gcc/config/cr16/cr16.h
+++ b/gcc/config/cr16/cr16.h
@@ -67,6 +67,8 @@ do                                         \
 while (0)
 #endif
 
+#define TARGET_RUST_CPU_INFO cr16_rust_target_cpu_info
+
 /* Force the generation of dwarf .debug_frame sections even if not
    compiling -g.  This guarantees that we can unwind the stack.  */
 #define DWARF2_FRAME_INFO 1
diff --git a/gcc/config/cr16/t-cr16 b/gcc/config/cr16/t-cr16
index e18a15a..eccff6d 100644
--- a/gcc/config/cr16/t-cr16
+++ b/gcc/config/cr16/t-cr16
@@ -23,3 +23,6 @@ MULTILIB_DIRNAMES    = far-pic int32
 MULTILIB_MATCHES     =
 MULTILIB_EXTRA_OPTS  = mcr16cplus mdata-model=far
 
+cr16-rust.o: $(srcdir)/config/cr16/cr16-rust.c \
+  $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) $(TREE_H) $(C_COMMON_H)
+	$(COMPILER) -c $(ALL_COMPILERFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) $<
-- 
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