[PATCH, committed] Update GAS' -maltivec and -mvsx options to only enable the oldest version of their respective instruction sets

[Peter Bergner]

Update -maltivec and -mvsx options to only enable their oldest instructions.

Currently, the -maltivec and -mvsx GAS options enable *all* of the altivec
and vsx instructions respecitively that have ever been added.  This is in
constract to GCC's -maltivec and -mvsx options, which only enable the oldest
(ie, first) set of altivec and vsx instructions.  This patch changes GAS to
mimic GCC's behaviour with respect to -maltivec and -mvsx and it solves a
problem with trying to assemble the lxvx instruction which is different
between POWER8 and POWER9.

opcodes/
	* ppc-dis.c (ppc_opts) <altivec>: Do not use PPC_OPCODE_ALTIVEC2;
	<vsx>: Do not use PPC_OPCODE_VSX3;

gas/
	* testsuite/gas/ppc/altivec2.d (as): Use the -mpower8 option.
	(objdump): Use the -Mpower8 option.


diff --git a/opcodes/ppc-dis.c b/opcodes/ppc-dis.c
index 3f8aef8..ca50689 100644
--- a/opcodes/ppc-dis.c
+++ b/opcodes/ppc-dis.c
@@ -94,7 +94,7 @@ struct ppc_mopt ppc_opts[] = {
                | PPC_OPCODE_A2),
     0 },
   { "altivec", PPC_OPCODE_PPC,
-    PPC_OPCODE_ALTIVEC | PPC_OPCODE_ALTIVEC2 },
+    PPC_OPCODE_ALTIVEC },
   { "any",     0,
     PPC_OPCODE_ANY },
   { "booke",   PPC_OPCODE_PPC | PPC_OPCODE_BOOKE,
@@ -226,7 +226,7 @@ struct ppc_mopt ppc_opts[] = {
                | PPC_OPCODE_E500),
     PPC_OPCODE_VLE },
   { "vsx",     PPC_OPCODE_PPC,
-    PPC_OPCODE_VSX | PPC_OPCODE_VSX3 },
+    PPC_OPCODE_VSX },
   { "htm",     PPC_OPCODE_PPC,
     PPC_OPCODE_HTM },
 };
diff --git a/gas/testsuite/gas/ppc/altivec2.d b/gas/testsuite/gas/ppc/altivec2.d
index fc10fb5..26f9afa 100644
--- a/gas/testsuite/gas/ppc/altivec2.d
+++ b/gas/testsuite/gas/ppc/altivec2.d
@@ -1,5 +1,5 @@
-#as: -maltivec
-#objdump: -dr -Maltivec
+#as: -mpower8
+#objdump: -dr -Mpower8
 #name: Altivec ISA 2.07 instructions
 
 .*