MIPS/opcodes: Add TX39 CP0 register names

The TX39 core has its distinct set of CP0 registers[1], so it needs a
separate table to hold their names.  Add a test case accordingly.

References:

[1] "32-Bit RISC Microprocessor TX39 Family Core Architecture User's
    Manual", Toshiba, Jul. 27, 1995, Section 2.2.2 "System control
    coprocessor (CP0) registers", pp. 9-10

	opcodes/
	* mips-dis.c (mips_cp0_names_r3900): New variable.
	(mips_arch_choices): Use it rather than `mips_cp0_names_numeric'
	for "r3900".

	gas/
	* testsuite/gas/mips/cp0-names-r3900.d: New test.
	* testsuite/gas/mips/mips.exp: Run it.

5 files changed, 68 insertions, 1 deletions

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 3b94c5d..4d7f814 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,5 +1,10 @@
 2021-05-29  Maciej W. Rozycki  <macro@orcam.me.uk>
 
+	* testsuite/gas/mips/cp0-names-r3900.d: New test.
+	* testsuite/gas/mips/mips.exp: Run it.
+
+2021-05-29  Maciej W. Rozycki  <macro@orcam.me.uk>
+
 	* testsuite/gas/mips/micromips.d: Update disassembly according
 	to "dmtc1" entry fix with opcodes.
 	* testsuite/gas/mips/micromips-compact.d: Likewise.
diff --git a/gas/testsuite/gas/mips/cp0-names-r3900.d b/gas/testsuite/gas/mips/cp0-names-r3900.d
new file mode 100644
index 0000000..fe971a8
--- /dev/null
+++ b/gas/testsuite/gas/mips/cp0-names-r3900.d
@@ -0,0 +1,43 @@
+#objdump: -dr --prefix-addresses --show-raw-insn -M gpr-names=numeric,cp0-names=r3900
+#name: MIPS CP0 register disassembly (r3900)
+#as: -32 -march=r3900
+#source: cp0-names.s
+
+# Check objdump's handling of -M cp0-names=foo options.
+
+.*: +file format .*mips.*
+
+Disassembly of section \.text:
+[0-9a-f]+ <[^>]*> 40800000 	mtc0	\$0,\$0
+[0-9a-f]+ <[^>]*> 40800800 	mtc0	\$0,\$1
+[0-9a-f]+ <[^>]*> 40801000 	mtc0	\$0,\$2
+[0-9a-f]+ <[^>]*> 40801800 	mtc0	\$0,c0_config
+[0-9a-f]+ <[^>]*> 40802000 	mtc0	\$0,\$4
+[0-9a-f]+ <[^>]*> 40802800 	mtc0	\$0,\$5
+[0-9a-f]+ <[^>]*> 40803000 	mtc0	\$0,\$6
+[0-9a-f]+ <[^>]*> 40803800 	mtc0	\$0,c0_cache
+[0-9a-f]+ <[^>]*> 40804000 	mtc0	\$0,c0_badvaddr
+[0-9a-f]+ <[^>]*> 40804800 	mtc0	\$0,\$9
+[0-9a-f]+ <[^>]*> 40805000 	mtc0	\$0,\$10
+[0-9a-f]+ <[^>]*> 40805800 	mtc0	\$0,\$11
+[0-9a-f]+ <[^>]*> 40806000 	mtc0	\$0,c0_sr
+[0-9a-f]+ <[^>]*> 40806800 	mtc0	\$0,c0_cause
+[0-9a-f]+ <[^>]*> 40807000 	mtc0	\$0,c0_epc
+[0-9a-f]+ <[^>]*> 40807800 	mtc0	\$0,c0_prid
+[0-9a-f]+ <[^>]*> 40808000 	mtc0	\$0,c0_debug
+[0-9a-f]+ <[^>]*> 40808800 	mtc0	\$0,c0_depc
+[0-9a-f]+ <[^>]*> 40809000 	mtc0	\$0,\$18
+[0-9a-f]+ <[^>]*> 40809800 	mtc0	\$0,\$19
+[0-9a-f]+ <[^>]*> 4080a000 	mtc0	\$0,\$20
+[0-9a-f]+ <[^>]*> 4080a800 	mtc0	\$0,\$21
+[0-9a-f]+ <[^>]*> 4080b000 	mtc0	\$0,\$22
+[0-9a-f]+ <[^>]*> 4080b800 	mtc0	\$0,\$23
+[0-9a-f]+ <[^>]*> 4080c000 	mtc0	\$0,\$24
+[0-9a-f]+ <[^>]*> 4080c800 	mtc0	\$0,\$25
+[0-9a-f]+ <[^>]*> 4080d000 	mtc0	\$0,\$26
+[0-9a-f]+ <[^>]*> 4080d800 	mtc0	\$0,\$27
+[0-9a-f]+ <[^>]*> 4080e000 	mtc0	\$0,\$28
+[0-9a-f]+ <[^>]*> 4080e800 	mtc0	\$0,\$29
+[0-9a-f]+ <[^>]*> 4080f000 	mtc0	\$0,\$30
+[0-9a-f]+ <[^>]*> 4080f800 	mtc0	\$0,\$31
+	\.\.\.
diff --git a/gas/testsuite/gas/mips/mips.exp b/gas/testsuite/gas/mips/mips.exp
index d021f05..8f3c7d9 100644
--- a/gas/testsuite/gas/mips/mips.exp
+++ b/gas/testsuite/gas/mips/mips.exp
@@ -1315,6 +1315,7 @@ if { [istarget mips*-*-vxworks*] } {
 
     run_dump_test "cp0-names-numeric"
     run_dump_test "cp0-names-r3000"
+    run_dump_test "cp0-names-r3900"
     run_dump_test "cp0-names-r4000" \
 		  { { {name} {(r4000)} } { {objdump} {-M cp0-names=r4000} } }
     run_dump_test "cp0-names-r4000" \
diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index f81b2f7..1a1833a 100644
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,5 +1,11 @@
 2021-05-29  Maciej W. Rozycki  <macro@orcam.me.uk>
 
+	* mips-dis.c (mips_cp0_names_r3900): New variable.
+	(mips_arch_choices): Use it rather than `mips_cp0_names_numeric'
+	for "r3900".
+
+2021-05-29  Maciej W. Rozycki  <macro@orcam.me.uk>
+
 	* mips-opc.c (mips_builtin_opcodes): Switch "cttc2", "mttc2",
 	and "mtthc2" to using the `G' rather than `g' operand code for
 	the coprocessor control register referred.
diff --git a/opcodes/mips-dis.c b/opcodes/mips-dis.c
index d519420..0bdf7cf 100644
--- a/opcodes/mips-dis.c
+++ b/opcodes/mips-dis.c
@@ -122,6 +122,18 @@ static const char * const mips_cp1_names_numeric[32] =
   "$24",  "$25",  "$26",  "$27",  "$28",  "$29",  "$30",  "$31"
 };
 
+static const char * const mips_cp0_names_r3900[32] =
+{
+  "$0",           "$1",           "$2",           "c0_config",
+  "$4",           "$5",           "$6",           "c0_cache",
+  "c0_badvaddr",  "$9",           "$10",          "$11",
+  "c0_sr",        "c0_cause",     "c0_epc",       "c0_prid",
+  "c0_debug",     "c0_depc",      "$18",          "$19",
+  "$20",          "$21",          "$22",          "$23",
+  "$24",          "$25",          "$26",          "$27",
+  "$28",          "$29",          "$30",          "$31",
+};
+
 static const char * const mips_cp0_names_r3000[32] =
 {
   "c0_index",     "c0_random",    "c0_entrylo",   "$3",
@@ -457,7 +469,7 @@ const struct mips_arch_choice mips_arch_choices[] =
     mips_cp0_names_r3000, NULL, 0, mips_cp1_names_numeric,
     mips_hwr_names_numeric },
   { "r3900",	1, bfd_mach_mips3900, CPU_R3900, ISA_MIPS1, 0,
-    mips_cp0_names_numeric, NULL, 0, mips_cp1_names_numeric,
+    mips_cp0_names_r3900, NULL, 0, mips_cp1_names_numeric,
     mips_hwr_names_numeric },
   { "r4000",	1, bfd_mach_mips4000, CPU_R4000, ISA_MIPS3, 0,
     mips_cp0_names_r4000, NULL, 0, mips_cp1_names_numeric,