[committed] RISC-V: Make g imply zmmul extension.

[Tsukasa OI]

On 2022/09/16 11:33, Jeff Law via Binutils wrote:
> 
> On 9/15/22 19:39, Nelson Chu wrote:
>> bfd/
>>     * elfxx-riscv.c (riscv_implicit_subset): Moved entry of m after g,
>>     so that g can imply zmmul.
>> gas/
>>     * testsuite/gas/riscv/attribute-01.d: Updated.
>>     * testsuite/gas/riscv/attribute-02.d: Likewise.
>>     * testsuite/gas/riscv/attribute-03.d: Likewise.
>>     * testsuite/gas/riscv/attribute-04.d: Likewise.
>>     * testsuite/gas/riscv/attribute-05.d: Likewise.
>>     * testsuite/gas/riscv/attribute-10.d: Likewise.
>>     * testsuite/gas/riscv/march-imply-g.d: Likewise.
>>     * testsuite/gas/riscv/march-imply-unsupported.d: Likewise.
> 
> Does this happen to fix this kind of failure that started showing up a
> week or two ago?
> 
> /tmp/ccdAErP7.s:6522: Error: unrecognized opcode `mul a5,a4,a5',
> extension `m' or `zmmul' required
> 
> I started chasing it down and concluded it likely wasn't the compiler,
> but couldn't take it further before covid knocked me out.  I'm just
> starting to try and catch up on things today...

Oh no.  I apologize for a severe regression caused by my patchset
implementing 'Zmmul'.

I inspected the riscv_implicit_subsets array (that Nelson fixed "m")
myself and found that only anomaly is "g" (there is a good reason for
this and is harmless).  So I believe that his patch fixed all extension
dependency issues so far.

Tsukasa

> 
> 
> jeff
>