MIPS16/opcodes: Reformat raw EXTEND and undecoded output

Use a tab rather than a space to separate `extend' and its uninterpreted
argument output, like with regular instructions.  Separate hexadecimal
halves of undecoded extended instructions output with a space instead of
presenting them concatenated.

	opcodes/
	* mips-dis.c (print_insn_mips16): Use a tab rather than a space
	to separate `extend' and its uninterpreted argument output.
	Separate hexadecimal halves of undecoded extended instructions
	output.

	binutils/
	* testsuite/binutils-all/mips/mips16-extend-noinsn.d: New test.
	* testsuite/binutils-all/mips/mips16-extend-noinsn.s: New test
	source.
	* testsuite/binutils-all/mips/mips.exp: Run the new test.

binutils/testsuite/binutils-all/mips/mips.exp

@@ -25,4 +25,5 @@ if [is_elf_format] {
     run_dump_test "mixed-mips16-micromips"
     run_dump_test "mips16-undecoded"
     run_dump_test "mips16-pcrel"
+    run_dump_test "mips16-extend-noinsn"
 }

binutils/testsuite/binutils-all/mips/mips16-extend-noinsn.d

@@ -0,0 +1,33 @@
+#PROG: objcopy
+#objdump: -d --prefix-addresses --show-raw-insn
+#name: MIPS16 unsupported EXTEND and undefined opcode disassembly
+#as: -32
+
+# Verify raw hexadecimal EXTEND and inexistent opcode disassembly.
+
+.*: +file format .*mips.*
+
+Disassembly of section \.text:
+[0-9a-f]+ <[^>]*> 6500      	nop
+[0-9a-f]+ <[^>]*> f123      	extend	0x123
+[0-9a-f]+ <[^>]*> f456      	extend	0x456
+[0-9a-f]+ <[^>]*> f765      	extend	0x765
+[0-9a-f]+ <[^>]*> 1800 0000 	jal	00000000 <foo>
+[0-9a-f]+ <[^>]*> 6500      	nop
+[0-9a-f]+ <[^>]*> f432      	extend	0x432
+[0-9a-f]+ <[^>]*> 1c00 0000 	jalx	00000000 <foo>
+[0-9a-f]+ <[^>]*> 6500      	nop
+[0-9a-f]+ <[^>]*> f123 6621 	0xf123 0x6621
+[0-9a-f]+ <[^>]*> f456 e935 	0xf456 0xe935
+[0-9a-f]+ <[^>]*> f765 ea60 	0xf765 0xea60
+[0-9a-f]+ <[^>]*> f432 ece0 	0xf432 0xece0
+[0-9a-f]+ <[^>]*> f5aa e971 	0xf5aa 0xe971
+[0-9a-f]+ <[^>]*> f655 ebf1 	0xf655 0xebf1
+[0-9a-f]+ <[^>]*> 6621      	0x6621
+[0-9a-f]+ <[^>]*> e935      	0xe935
+[0-9a-f]+ <[^>]*> ea60      	0xea60
+[0-9a-f]+ <[^>]*> ece0      	0xece0
+[0-9a-f]+ <[^>]*> e971      	0xe971
+[0-9a-f]+ <[^>]*> ebf1      	0xebf1
+[0-9a-f]+ <[^>]*> 6500      	nop
+	\.\.\.

binutils/testsuite/binutils-all/mips/mips16-extend-noinsn.s

@@ -0,0 +1,25 @@
+	.set	mips16
+foo:
+	nop
+	.half	0xf123, 0xf456
+	.half	0xf765
+	jal	bar
+	.half	0xf432
+	jalx	baz
+	.half	0xf123, 0x6621
+	.half	0xf456, 0xe935
+	.half	0xf765, 0xea60
+	.half	0xf432, 0xece0
+	.half	0xf5aa, 0xe971
+	.half	0xf655, 0xebf1
+	.half	0x6621
+	.half	0xe935
+	.half	0xea60
+	.half	0xece0
+	.half	0xe971
+	.half	0xebf1
+	nop
+
+# Force some (non-delay-slot) zero bytes, to make 'objdump' print ...
+	.align	4, 0
+	.space	16