MIPS16: Add ASMACRO instruction support

Add ASMACRO instruction support as per the MIPS16e ASE architecture
specifications [1][2], completing MIPS16e instruction set support.

[1] "MIPS32 Architecture for Programmers, Volume IV-a: The MIPS16e
    Application-Specific Extension to the MIPS32 Architecture", MIPS
    Technologies, Inc., Document Number: MD00076, Revision 2.63, July
    16, 2013, Section 4.1 "MIPS16e Instruction Descriptions", p. 65

[2] "MIPS64 Architecture for Programmers, Volume IV-a: The MIPS16e
    Application-Specific Extension to the MIPS64 Architecture", MIPS
    Technologies, Inc., Document Number: MD00077, Revision 2.60, June
    25, 2008, Section 1.1 "MIPS16e Instruction Descriptions", p. 66

	include/
	* opcode/mips.h: Document `0', `1', `2', `3', `4' and `s'
	operand codes.

	opcodes/
	* mips16-opc.c (decode_mips16_operand): Add `0', `1', `2', `3',
	`4' and `s' operand codes.
	(mips16_opcodes): Add "asmacro" entry.

	binutils/
	* testsuite/binutils-all/mips/mips16-extend-insn.d: Update for
	ASMACRO support.

	gas/
	* testsuite/gas/mips/mips16-asmacro.d: New test.
	* testsuite/gas/mips/mips16-32@mips16-asmacro.d: New test.
	* testsuite/gas/mips/mips16-64@mips16-asmacro.d: New test.
	* testsuite/gas/mips/mips16-asmacro.s: New test source.
	* testsuite/gas/mips/mips.exp: Run the new tests.

6 files changed, 79 insertions, 0 deletions

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 3a05d78..16575d1 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,5 +1,13 @@
 2016-12-23  Maciej W. Rozycki  <macro@imgtec.com>
 
+	* testsuite/gas/mips/mips16-asmacro.d: New test.
+	* testsuite/gas/mips/mips16-32@mips16-asmacro.d: New test.
+	* testsuite/gas/mips/mips16-64@mips16-asmacro.d: New test.
+	* testsuite/gas/mips/mips16-asmacro.s: New test source.
+	* testsuite/gas/mips/mips.exp: Run the new tests.
+
+2016-12-23  Maciej W. Rozycki  <macro@imgtec.com>
+
 	* config/tc-mips.c (mips16_immed): Limit `mips16_immed_extend'
 	use to operands whose LSB position is zero.
 
diff --git a/gas/testsuite/gas/mips/mips.exp b/gas/testsuite/gas/mips/mips.exp
index 678e8d9..0da2df9 100644
--- a/gas/testsuite/gas/mips/mips.exp
+++ b/gas/testsuite/gas/mips/mips.exp
@@ -1357,6 +1357,8 @@ if { [istarget mips*-*-vxworks*] } {
     run_dump_test "mips16-jal-t"
     run_dump_test "mips16-jal-e"
 
+    run_dump_test_arches "mips16-asmacro" [mips_arch_list_matching mips16-32]
+
     run_dump_test "vxworks1"
     run_dump_test "vxworks1-xgot"
     run_dump_test "vxworks1-el"
diff --git a/gas/testsuite/gas/mips/mips16-32@mips16-asmacro.d b/gas/testsuite/gas/mips/mips16-32@mips16-asmacro.d
new file mode 100644
index 0000000..8c50a8c
--- /dev/null
+++ b/gas/testsuite/gas/mips/mips16-32@mips16-asmacro.d
@@ -0,0 +1,21 @@
+#objdump: -d --prefix-addresses --show-raw-insn
+#name: MIPS16 ASMACRO instruction
+#as: -32
+#source: mips16-asmacro.s
+
+.*: +file format .*mips.*
+
+Disassembly of section \.text:
+[0-9a-f]+ <[^>]*> f000      	extend	0x0
+[0-9a-f]+ <[^>]*> e000      	0xe000
+[0-9a-f]+ <[^>]*> f0a4      	extend	0xa4
+[0-9a-f]+ <[^>]*> e341      	addu	s0,v1,v0
+[0-9a-f]+ <[^>]*> f0e0      	extend	0xe0
+[0-9a-f]+ <[^>]*> e71f      	subu	a3,s0
+[0-9a-f]+ <[^>]*> f501      	extend	0x501
+[0-9a-f]+ <[^>]*> e264      	0xe264
+[0-9a-f]+ <[^>]*> f71f      	extend	0x71f
+[0-9a-f]+ <[^>]*> e0e0      	0xe0e0
+[0-9a-f]+ <[^>]*> f7ff      	extend	0x7ff
+[0-9a-f]+ <[^>]*> e7ff      	subu	a3,a3
+	\.\.\.
diff --git a/gas/testsuite/gas/mips/mips16-64@mips16-asmacro.d b/gas/testsuite/gas/mips/mips16-64@mips16-asmacro.d
new file mode 100644
index 0000000..466f411
--- /dev/null
+++ b/gas/testsuite/gas/mips/mips16-64@mips16-asmacro.d
@@ -0,0 +1,21 @@
+#objdump: -d --prefix-addresses --show-raw-insn
+#name: MIPS16 ASMACRO instruction
+#as: -32
+#source: mips16-asmacro.s
+
+.*: +file format .*mips.*
+
+Disassembly of section \.text:
+[0-9a-f]+ <[^>]*> f000      	extend	0x0
+[0-9a-f]+ <[^>]*> e000      	daddu	s0,s0
+[0-9a-f]+ <[^>]*> f0a4      	extend	0xa4
+[0-9a-f]+ <[^>]*> e341      	addu	s0,v1,v0
+[0-9a-f]+ <[^>]*> f0e0      	extend	0xe0
+[0-9a-f]+ <[^>]*> e71f      	subu	a3,s0
+[0-9a-f]+ <[^>]*> f501      	extend	0x501
+[0-9a-f]+ <[^>]*> e264      	daddu	s1,v0,v1
+[0-9a-f]+ <[^>]*> f71f      	extend	0x71f
+[0-9a-f]+ <[^>]*> e0e0      	daddu	s0,a3
+[0-9a-f]+ <[^>]*> f7ff      	extend	0x7ff
+[0-9a-f]+ <[^>]*> e7ff      	subu	a3,a3
+	\.\.\.
diff --git a/gas/testsuite/gas/mips/mips16-asmacro.d b/gas/testsuite/gas/mips/mips16-asmacro.d
new file mode 100644
index 0000000..1a81c84
--- /dev/null
+++ b/gas/testsuite/gas/mips/mips16-asmacro.d
@@ -0,0 +1,14 @@
+#objdump: -d --prefix-addresses --show-raw-insn
+#name: MIPS16 ASMACRO instruction
+#as: -32
+
+.*: +file format .*mips.*
+
+Disassembly of section \.text:
+[0-9a-f]+ <[^>]*> f000 e000 	asmacro	0x0,0x0,0x0,0x0,0x0,0x0
+[0-9a-f]+ <[^>]*> f0a4 e341 	asmacro	0x0,0x1,0x2,0x3,0x4,0x5
+[0-9a-f]+ <[^>]*> f0e0 e71f 	asmacro	0x0,0x1f,0x0,0x7,0x0,0x7
+[0-9a-f]+ <[^>]*> f501 e264 	asmacro	0x5,0x4,0x3,0x2,0x1,0x0
+[0-9a-f]+ <[^>]*> f71f e0e0 	asmacro	0x7,0x0,0x7,0x0,0x1f,0x0
+[0-9a-f]+ <[^>]*> f7ff e7ff 	asmacro	0x7,0x1f,0x7,0x7,0x1f,0x7
+	\.\.\.
diff --git a/gas/testsuite/gas/mips/mips16-asmacro.s b/gas/testsuite/gas/mips/mips16-asmacro.s
new file mode 100644
index 0000000..18d0ce1
--- /dev/null
+++ b/gas/testsuite/gas/mips/mips16-asmacro.s
@@ -0,0 +1,13 @@
+	.set	mips32
+	.set	mips16
+foo:
+	asmacro	0, 0, 0, 0, 0, 0
+	asmacro	0, 1, 2, 3, 4, 5
+	asmacro	0, 31, 0, 7, 0, 7
+	asmacro	5, 4, 3, 2, 1, 0
+	asmacro	7, 0, 7, 0, 31, 0
+	asmacro	7, 31, 7, 7, 31, 7
+
+# Force some (non-delay-slot) zero bytes, to make 'objdump' print ...
+	.align	4, 0
+	.space	16