[Bug gas/31270] New: Unknown instructions in the instruction table (RISCV assembler

[jacob at jacob dot remcomp.fr]

https://sourceware.org/bugzilla/show_bug.cgi?id=31270

            Bug ID: 31270
           Summary: Unknown instructions in the instruction table (RISCV
                    assembler
           Product: binutils
           Version: 2.16
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gas
          Assignee: unassigned at sourceware dot org
          Reporter: jacob at jacob dot remcomp.fr
  Target Milestone: ---

RISCV assembler
The instructions th.ipop and th.ipush are not documented in the T-Head
documentation and nowhere in the net.

I do not know what it is, and would like to know why it appears in the
instruction table. When I assemble this, it produces 0x50000b

My T-Head machine doesn't boot (corrupt disk) so I can't test this. What do
this instructions do?

These are the entries in the instruction table:

/* Vendor-specific (T-Head) XTheadInt instructions.  */
{"th.ipop",0,INSN_CLASS_XTHEADINT,"",MATCH_TH_IPOP,MASK_TH_IPOP,match_opcode,0},
{"th.ipush",0,INSN_CLASS_XTHEADINT,"",MATCH_TH_IPUSH,MASK_TH_IPUSH,match_opcode,0},

Thanks in advance

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