[PATCH v5 2/2] MIPS: default output r6 obj if the triple is r6

[YunQiang Su]

If the triple is mipsisa32r6* or mipsisa64r6*, ld/as should output
r6 objects by default.
The triples with vendor `img` should do same.

The examples include:
	as xx.s -o xx.o
	ld -r -b binary xx.dat -o xx.o
---
 bfd/config.bfd   | 6 ++++++
 bfd/elfxx-mips.c | 4 ++--
 bfd/elfxx-mips.h | 4 ++++
 gas/configure    | 9 +++++++++
 gas/configure.ac | 9 +++++++++
 5 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/bfd/config.bfd b/bfd/config.bfd
index 1e4bea191dd..78752994456 100644
--- a/bfd/config.bfd
+++ b/bfd/config.bfd
@@ -1535,3 +1535,9 @@ case "${targ_defvec} ${targ_selvecs}" in
     targ_archs="$targ_archs bfd_iamcu_arch"
     ;;
 esac
+
+case "${targ}" in
+  mipsisa32r6* | mipsisa64r6* | mips*-img-*)
+    targ_cflags="$targ_cflags -DMIPS_DEFAULT_R6=1"
+    ;;
+esac
diff --git a/bfd/elfxx-mips.c b/bfd/elfxx-mips.c
index 13a89953293..c9cd2f8099f 100644
--- a/bfd/elfxx-mips.c
+++ b/bfd/elfxx-mips.c
@@ -12327,9 +12327,9 @@ mips_set_isa_flags (bfd *abfd)
     {
     default:
       if (ABI_N32_P (abfd) || ABI_64_P (abfd))
-        val = E_MIPS_ARCH_3;
+        val = MIPS_DEFAULT_R6 ? E_MIPS_ARCH_64R6 : E_MIPS_ARCH_3;
       else
-        val = E_MIPS_ARCH_1;
+        val = MIPS_DEFAULT_R6 ? E_MIPS_ARCH_32R6 : E_MIPS_ARCH_1;
       break;
 
     case bfd_mach_mips3000:
diff --git a/bfd/elfxx-mips.h b/bfd/elfxx-mips.h
index 4addf6f5d1a..f15dceac48e 100644
--- a/bfd/elfxx-mips.h
+++ b/bfd/elfxx-mips.h
@@ -29,6 +29,10 @@ enum reloc_check
   check_shuffle
 };
 
+#ifndef MIPS_DEFAULT_R6
+#define MIPS_DEFAULT_R6 0
+#endif
+
 extern bool _bfd_mips_elf_mkobject
   (bfd *);
 extern bool _bfd_mips_elf_close_and_cleanup
diff --git a/gas/configure b/gas/configure
index 868f4a911a9..0daa80d5b4c 100755
--- a/gas/configure
+++ b/gas/configure
@@ -12211,6 +12211,15 @@ _ACEOF
 	    use_e_mips_abi_o32=1
 	    ;;
 	esac
+	# If Vendor is IMG, then MIPSr6 is used
+	case ${target} in
+	  mips*64*-img-*)
+	    mips_cpu=mips64r6
+	    ;;
+	  mips*-img-*)
+	    mips_cpu=mips32r6
+	    ;;
+	esac
 	# Decide whether to generate 32-bit or 64-bit code by default.
 	# Used to resolve -march=from-abi when an embedded ABI is selected.
 	case ${target} in
diff --git a/gas/configure.ac b/gas/configure.ac
index 03728ffce4d..2b91f9ec616 100644
--- a/gas/configure.ac
+++ b/gas/configure.ac
@@ -380,6 +380,15 @@ changequote([,])dnl
 	    use_e_mips_abi_o32=1
 	    ;;
 	esac
+	# If Vendor is IMG, then MIPSr6 is used
+	case ${target} in
+	  mips*64*-img-*)
+	    mips_cpu=mips64r6
+	    ;;
+	  mips*-img-*)
+	    mips_cpu=mips32r6
+	    ;;
+	esac
 	# Decide whether to generate 32-bit or 64-bit code by default.
 	# Used to resolve -march=from-abi when an embedded ABI is selected.
 	case ${target} in
-- 
2.30.2