PowerPC Improve support for Gekko & Broadway

This is a relatively straightforward patch to improve support for the
IBM Gekko and IBM Broadway processors.  Broadway is functionally
equivalent to the IBM 750CL, while Gekko's functionality is a subset
of theirs.  The patch simplifies this reality and adds -mgekko and
-mbroadway as aliases for -m750cl.  I didn't feel it was worth wasting
a PPC_OPCODE_* bit to differentiate Gekko.  The patch adds a number of
simplified mnemonics for special purpose register access.  Notably,
Broadway adds 4 additional IBAT and DBAT registers but these are not
assigned sequential SPR numbers.

gas/
	* config/tc-ppc.c (md_show_usage): Add -mgekko and -mbroadway.
	* doc/as.texi (Target PowerPC options): Add -mgekko and -mbroadway.
	* doc/c-ppc.texi (PowerPC-Opts): Likewise.
	* testsuite/gas/ppc/broadway.d,
	* testsuite/gas/ppc/broadway.s: New test for broadway.
	* testsuite/gas/ppc/ppc.exp: Run new test.
include/
	* opcode/ppc.h (PPC_OPCODE_750): Adjust comment.
opcodes/
	* ppc-dis.c (ppc_opts): Add -mgekko and -mbroadway.
	(powerpc_init_dialect): Handle bfd_mach_ppc_750.
	* ppc-opc.c (insert_sprbat, extract_sprbat): New functions to
	support disjointed BAT.
	(powerpc_operands): Allow extra bit in SPRBAT_MASK.  Add SPRGQR.
	(XSPRGQR_MASK, GEKKO, BROADWAY): Define.
	(powerpc_opcodes): Add 750cl extended mnemonics for spr access.

1 files changed, 4 insertions, 4 deletions

diff --git a/gas/doc/as.texi b/gas/doc/as.texi
index e9b6016..aea5e71 100644
--- a/gas/doc/as.texi
+++ b/gas/doc/as.texi
@@ -476,10 +476,10 @@ gcc(1), ld(1), and the Info entries for @file{binutils} and @file{ld}.
 @emph{Target PowerPC options:}
    [@b{-a32}|@b{-a64}]
    [@b{-mpwrx}|@b{-mpwr2}|@b{-mpwr}|@b{-m601}|@b{-mppc}|@b{-mppc32}|@b{-m603}|@b{-m604}|@b{-m403}|@b{-m405}|
-    @b{-m440}|@b{-m464}|@b{-m476}|@b{-m7400}|@b{-m7410}|@b{-m7450}|@b{-m7455}|@b{-m750cl}|@b{-mppc64}|
-    @b{-m620}|@b{-me500}|@b{-e500x2}|@b{-me500mc}|@b{-me500mc64}|@b{-me5500}|@b{-me6500}|@b{-mppc64bridge}|
-    @b{-mbooke}|@b{-mpower4}|@b{-mpwr4}|@b{-mpower5}|@b{-mpwr5}|@b{-mpwr5x}|@b{-mpower6}|@b{-mpwr6}|
-    @b{-mpower7}|@b{-mpwr7}|@b{-mpower8}|@b{-mpwr8}|@b{-mpower9}|@b{-mpwr9}@b{-ma2}|
+    @b{-m440}|@b{-m464}|@b{-m476}|@b{-m7400}|@b{-m7410}|@b{-m7450}|@b{-m7455}|@b{-m750cl}|@b{-mgekko}|
+    @b{-mbroadway}|@b{-mppc64}|@b{-m620}|@b{-me500}|@b{-e500x2}|@b{-me500mc}|@b{-me500mc64}|@b{-me5500}|
+    @b{-me6500}|@b{-mppc64bridge}|@b{-mbooke}|@b{-mpower4}|@b{-mpwr4}|@b{-mpower5}|@b{-mpwr5}|@b{-mpwr5x}|
+    @b{-mpower6}|@b{-mpwr6}|@b{-mpower7}|@b{-mpwr7}|@b{-mpower8}|@b{-mpwr8}|@b{-mpower9}|@b{-mpwr9}@b{-ma2}|
     @b{-mcell}|@b{-mspe}|@b{-mspe2}|@b{-mtitan}|@b{-me300}|@b{-mcom}]
    [@b{-many}] [@b{-maltivec}|@b{-mvsx}|@b{-mhtm}|@b{-mvle}]
    [@b{-mregnames}|@b{-mno-regnames}]