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Nelson Chu 00d4d1b0a3 RISC-V: Support to add implicit extensions for G. 
G is a special case, consider the ISA spec github issue as follows,
https://github.com/riscv/riscv-isa-manual/issues/575

My understand is that - i, m, a, f and d extensions are not g's implicit
extensions, they are g's expansions.  The zifencei is the implicit extension
of g, and so is zicsr, since it is implicited by f (or i2p1).  However,
we add the g with the RISCV_UNKNOWN_VERSION to the subset list, and it
will not output to the arch string, it is only used to check what implicit
extensions are need to be added.

	bfd/
	* elfxx-riscv.c (riscv_parse_add_subset): Allow to add g with
	RISCV_UNKNOWN_VERSION versions.
	(riscv_parse_std_ext): Add g to the subset list, we only use it
	to add the implicit extensions, but won't output it to arch string.
	(riscv_parse_add_implicit_subsets): Add implicit zicsr and zifencei
	for g extension.
	(riscv_arch_str1): Do not output g to the arch string.
	* elfxx-riscv.h (RISCV_UNKNOWN_VERSION): Moved to include/opcode/riscv.h.

	gas/
	* testsuite/gas/riscv/attribute-10.d: Updated.
	* testsuite/gas/riscv/march-imply-g.d: New testcase for g.
	* testsuite/gas/riscv/march-imply-unsupported.d: The zicsr and zifencei
	are not supported in the ISA spec v2.2, so don't add and output them.

	include/
	* opcode/riscv.h (RISCV_UNKNOWN_VERSION): added.
2020-12-01 15:23:02 +08:00
..
aout Fixes for the magic number used in PDP11 AOUT binaries. 2020-04-14 14:41:27 +01:00
cgen Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
coff Remove powerpc PE support 2020-07-09 22:58:16 +09:30
elf Support SHF_GNU_RETAIN ELF section flag 2020-11-18 11:51:13 +00:00
gdb Update copyright year range in all GDB files. 2020-01-01 10:20:53 +04:00
mach-o Recognize some new Mach-O load commands 2020-06-22 14:29:20 +01:00
opcode RISC-V: Support to add implicit extensions for G. 2020-12-01 15:23:02 +08:00
som PR26457 UBSAN: som.c:1794 left shift cannot be represented 2020-08-31 20:28:09 +09:30
vms Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
alloca-conf.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
ansidecl.h Update libiberty sources with changes in the gcc mainline. 2020-01-17 14:13:22 +00:00
bfdlink.h bfd, include, ld, binutils, libctf: CTF should use the dynstr/sym 2020-11-20 13:34:07 +00:00
binary-io.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
bout.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
ChangeLog RISC-V: Support to add implicit extensions for G. 2020-12-01 15:23:02 +08:00
ChangeLog-0415
ChangeLog-2016
ChangeLog-2017
ChangeLog-2018
ChangeLog-2019 ChangeLog rotation 2020-01-01 18:12:08 +10:30
ChangeLog-9103
COPYING
COPYING3
ctf-api.h libctf, include: support foreign-endianness symtabs with CTF 2020-11-25 19:11:35 +00:00
ctf.h libctf, include: CTF-archive-wide symbol lookup 2020-11-20 13:34:11 +00:00
demangle.h Update libiberty sources with changes in the gcc mainline. 2020-01-17 14:13:22 +00:00
diagnostics.h ada-lex.l: Ignore register diagnostic also for g++ defaulting to ISO C++17 2020-08-23 12:14:34 +02:00
dis-asm.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
dwarf2.def Sync libiberty and include with GCC for get_DW_UT_name. 2020-09-24 22:55:24 +02:00
dwarf2.h Sync libiberty and include with GCC for get_DW_UT_name. 2020-09-24 22:55:24 +02:00
dyn-string.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
environ.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
fibheap.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
filenames.h Sync config, include and libiberty with GCC 2020-06-24 16:52:48 -07:00
floatformat.h Sync include, libiberty with GCC. 2020-09-11 11:32:00 -07:00
fnmatch.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
fopen-bin.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
fopen-same.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
fopen-vms.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
gcc-c-fe.def Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
gcc-c-interface.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
gcc-cp-fe.def Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
gcc-cp-interface.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
gcc-interface.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
getopt.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
hashtab.h Merge upstream GCC changes for include/ and libiberty/ directories 2020-02-25 17:04:42 +00:00
hp-symtab.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
leb128.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
libiberty.h Remove the use of the register keyword in the libiberty.h header file - it is deprecated and incompatible with C++17. 2020-06-25 11:16:42 +01:00
longlong.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
lto-symtab.h include: Sync lto-symtab.h and plugin-api.h with GCC 2020-03-21 03:39:18 -07:00
MAINTAINERS Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
md5.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
oasys.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
objalloc.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
obstack.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
os9k.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
partition.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
plugin-api.h include: Sync plugin-api.h with GCC 2020-04-01 02:36:11 -07:00
progress.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
safe-ctype.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
sha1.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
simple-object.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
sort.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
splay-tree.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
symcat.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
timeval-utils.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
vtv-change-permission.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
xregex2.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
xregex.h
xtensa-config.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
xtensa-isa-internal.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30
xtensa-isa.h Update year range in copyright notice of binutils files 2020-01-01 18:42:54 +10:30