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Nelson Chu 7ef19aa616 RISC-V: Improve the version parsing for arch string.
Keep the riscv_add_subset to do the same thing, and use a new
function, riscv_parse_add_subset, to cover most of the things
when parsing, including find the default versions for extensions,
and check whether the versions are valid.  The version 0p0 should
be an invalid version, that is the mistake I made before.  This
patch clarify the version rules as follows,

* We accept any version of extensions set by users, except 0p0.
* The non-standard x extensions must be set with versions in arch string.
* If user don't set the versions, or set 0p0 for the extensions, then try
  to find the supported versions according to the chosen ISA spec.
  Otherwise, report errors rather than output 0p0 for them.

Besides, we use as_bad rather than as_fatal to report more errors
for assembler.

	bfd/
	* elfxx-riscv.c (riscv_lookup_subset): Moved to front.
	(riscv_add_subset): Likewise.
	(riscv_release_subset_list): Likewise.
	(riscv_parse_add_subset): New function.  Find and check the
	versions before adding them by riscv_add_subset.
	(riscv_parsing_subset_version): Remove use_default_version
	and change the version type from unsigned to int.  Set the
	versions to RISCV_UNKNOWN_VERSION if we can not find them
	in the arch string.
	(riscv_parse_std_ext): Updated.
	(riscv_parse_prefixed_ext): Updated.  Since we use as_bad
	rather than as_fatal to report more errors, return NULL
	string if the parsed end_of_version is NULL, too.
	(riscv_parse_subset): Use a new boolean, no_conflict, to
	report more errors when we have more than one ISA conflicts.

	* elfxx-riscv.h (RISCV_DONT_CARE_VERSION): Changed to
	RISCV_UNKNOWN_VERSION.
	(riscv_lookup_subset_version): Removed.
	(riscv_parse_subset_t): Updated.

	gas/
	* config/tc-riscv.c (riscv_get_default_ext_version):
	Change the version type from unsigned to int.
	(riscv_set_arch): Use as_bad rather than as_fatal to
	report more errors.

	* testsuite/gas/riscv/attribute-02.d: Updated since x must be
	set with versions.
	* testsuite/gas/riscv/attribute-03.d: Likewise.
	* testsuite/gas/riscv/march-ok-two-nse.d: Likewise.
	* testsuite/gas/riscv/attribute-09.d: zicsr wasn't supported
	in the spec 2.2, so choose the newer spec.
	* testsuite/gas/riscv/march-fail-base-01.l: Updated since as_bad.
	* testsuite/gas/riscv/march-fail-base-02.l: Likewise.
	* testsuite/gas/riscv/march-fail-order-std.l: Likewise.
	* testsuite/gas/riscv/march-fail-order-x.l: Likewise.
	* testsuite/gas/riscv/march-fail-order-z.l: Likewise.
	* testsuite/gas/riscv/march-fail-porder.l: Likewise.
	* testsuite/gas/riscv/march-fail-rv32ef.l: Likewise.
	* testsuite/gas/riscv/march-fail-rv32id.l: Likewise.
	* testsuite/gas/riscv/march-fail-rv32iq.l: Likewise.
	* testsuite/gas/riscv/march-fail-rv64iq.l: Likewise.
	* testsuite/gas/riscv/march-fail-single-char.l: Likewise.
	* testsuite/gas/riscv/march-fail-unknown-std.l: Likewise.
	* testsuite/gas/riscv/march-fail-unknown.l: Likewise.
	* testsuite/gas/riscv/march-fail-uppercase.l: Likewise.
	* testsuite/gas/riscv/march-fail-version.l: Likewise.
	* testsuite/gas/riscv/march-fail-isa-spec.d: Likewise.
	* testsuite/gas/riscv/march-fail-isa-spec.l: Likewise.

	include/
	* opcode/riscv.h (riscv_ext_version):
	Change the version type from unsigned to int.
2020-12-01 15:16:25 +08:00
bfd RISC-V: Improve the version parsing for arch string. 2020-12-01 15:16:25 +08:00
binutils Allow spaces in the name of the external preprocessor used by windres. 2020-11-27 14:19:56 +00:00
config
contrib
cpu
elfcpp
etc
gas RISC-V: Improve the version parsing for arch string. 2020-12-01 15:16:25 +08:00
gdb Revert accidental empty commits 2020-11-30 13:59:57 +01:00
gdbserver gdbserver: add missing --disable-packet options to help text 2020-11-11 09:08:31 +00:00
gdbsupport Ignore system_error in thread startup 2020-11-20 08:22:46 -07:00
gnulib
gold gold: Add endbr64 to IBT TLSDESC PLT entry 2020-11-29 11:41:47 -08:00
gprof
include RISC-V: Improve the version parsing for arch string. 2020-12-01 15:16:25 +08:00
intl
ld tic6x elf testsuite fix 2020-12-01 11:26:58 +10:30
libctf libctf: Pass format argument to asprintf 2020-11-25 19:11:36 +00:00
libdecnumber
libiberty
opcodes RISC-V: Remove the unimplemented extensions. 2020-12-01 15:13:06 +08:00
readline
sim sim: pru: Add support for LMBD instruction 2020-11-12 22:41:10 +02:00
texinfo
zlib
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ChangeLog Use sha256 for hashes in the release process 2020-10-28 10:35:28 -04:00
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		   README for GNU development tools

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