[PATCH] gas: pru: Add TSEN and MVI instructions

[Jan Beulich]

On 22.02.2026 20:23, Dimitar Dimitrov wrote:
> Add support for TSEN and MVI instructions to GAS and libopcodes.
> TSEN is available in newer PRU core revisions, and can be used to
> implement multitasking.  MVI allows indirectly addressing CPU registers
> using a pointer in R1 register.

There don't look to be any provisions to limit insn availability based on
a targeted core revision. This isn't quite nice, but probably shouldn't
get in the way of getting this in. Seeing there is no maintainer for this
target - okay, with one nit addressed:

> --- a/opcodes/pru-dis.c
> +++ b/opcodes/pru-dis.c
> @@ -66,15 +66,34 @@ pru_find_opcode (unsigned long opcode)
>  #define NUMREGNAMES (32 * 8)
>  
>  static void
> -pru_print_insn_arg_reg (unsigned int r, unsigned int sel,
> -			disassemble_info *info)
> +pru_print_insn_arg_indreg (unsigned int r, unsigned int sel,
> +			   unsigned int mode,
> +			   disassemble_info *info)
>  {
> +  const char *fmtstr;
>    unsigned int i = r * RSEL_NUM_ITEMS + sel;
>    assert (i < (unsigned int)pru_num_regs);
>    assert (i < NUMREGNAMES);
> -  (*info->fprintf_func) (info->stream, "%s", pru_regs[i].name);
> +
> +  switch (mode)
> +    {
> +    case MVI_OP_MODE_DIRECT:		fmtstr = "%s"; break;
> +    case MVI_OP_MODE_INDIRECT:		fmtstr = "*%s"; break;
> +    case MVI_OP_MODE_INDIRECT_POSTINC:	fmtstr = "*%s++"; break;
> +    case MVI_OP_MODE_INDIRECT_PREDEC:	fmtstr = "*--%s"; break;
> +    default:				fmtstr = "<invalid>%s"; break;
> +    }
> +  (*info->fprintf_func) (info->stream, fmtstr, pru_regs[i].name);
> +}
> +
> +static void
> +pru_print_insn_arg_reg (unsigned int r, unsigned int sel,
> +			disassemble_info *info)
> +{
> +  pru_print_insn_arg_indreg (r, sel, MVI_OP_MODE_DIRECT, info);
>  }
>  
> +
>  /* The function pru_print_insn_arg uses the character pointed

Please don't introduce double blank lines.

Seeing that your original contribution of the port was committed by Alan,
I assume this change will again want committing on your behalf?

Jan