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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 /gas/ChangeLog | |
| 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 'gas/ChangeLog')
| -rw-r--r-- | gas/ChangeLog | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gas/ChangeLog b/gas/ChangeLog index 0cf20e6..c0102b5 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,5 +1,12 @@ 2020-12-01 Nelson Chu <nelson.chu@sifive.com> + * 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. + +2020-12-01 Nelson Chu <nelson.chu@sifive.com> + * config/tc-riscv.c (riscv_subset_supports): Updated. * testsuite/gas/riscv/march-imply-i2p0.d: New testcase. Need to add the implicit zicsr and zifencei when i's version less than 2.1. |