CMO not support

[F-eng666666]

An error occurred when version 13.2.0 was used to compile files with cbo instructions

[TommyMurphyTM1234]

The error seems correct - your operands seem to be illegal:

• Textual format for cbo.* asm operands - '(rs1)' and '0(rs1)' vs 'rs1' riscv/riscv-CMOs#47 (comment)

This compiles/assembles OK for example:

/* test.c */
void f(void)
{
    asm("cbo.zero 0(x5)";
}

./riscv64-unknown-elf-gcc -march=rv32gc_zicboz -mabi=ilp32d -c test.c
./riscv64-unknown-elf-objdump -dS test.o

test.o:     file format elf32-littleriscv


Disassembly of section .text:

00000000 <f>:
   0:   1141                    addi    sp,sp,-16
   2:   c622                    sw      s0,12(sp)
   4:   0800                    addi    s0,sp,16
   6:   0042a00f                cbo.zero        (t0)
   a:   0001                    nop
   c:   4432                    lw      s0,12(sp)
   e:   0141                    addi    sp,sp,16
  10:   8082                    ret

[TommyMurphyTM1234]

FWIW...

• https://github.com/riscv/riscv-CMOs/blob/master/specifications/cmobase-v1.0.1.pdf