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| author | Nelson Chu <nelson.chu@sifive.com> | 2020-11-20 22:33:11 +0800 |
|---|---|---|
| committer | Nelson Chu <nelson.chu@sifive.com> | 2020-12-01 15:23:02 +0800 |
| commit | 00d4d1b0a3a4d26c9d741b14e601ed2b86fe39ee (patch) | |
| tree | 8dfd78b2367272c63ce78996ac12c43c710c4e81 /include | |
| parent | dfe92496678a200464e54d80e96a608bfea338b9 (diff) | |
| download | gdb-00d4d1b0a3a4d26c9d741b14e601ed2b86fe39ee.zip gdb-00d4d1b0a3a4d26c9d741b14e601ed2b86fe39ee.tar.gz gdb-00d4d1b0a3a4d26c9d741b14e601ed2b86fe39ee.tar.bz2 | |
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.
Diffstat (limited to 'include')
| -rw-r--r-- | include/ChangeLog | 4 | ||||
| -rw-r--r-- | include/opcode/riscv.h | 2 |
2 files changed, 6 insertions, 0 deletions
diff --git a/include/ChangeLog b/include/ChangeLog index 7cda518..81486ad 100644 --- a/include/ChangeLog +++ b/include/ChangeLog @@ -1,5 +1,9 @@ 2020-12-01 Nelson Chu <nelson.chu@sifive.com> + * opcode/riscv.h (RISCV_UNKNOWN_VERSION): added. + +2020-12-01 Nelson Chu <nelson.chu@sifive.com> + * opcode/riscv.h (riscv_ext_version): Change the version type from unsigned to int. diff --git a/include/opcode/riscv.h b/include/opcode/riscv.h index 94a1380..680780a 100644 --- a/include/opcode/riscv.h +++ b/include/opcode/riscv.h @@ -354,6 +354,8 @@ enum riscv_isa_spec_class ISA_SPEC_CLASS_20191213 }; +#define RISCV_UNKNOWN_VERSION -1 + /* This structure holds version information for specific ISA. */ struct riscv_ext_version |