From: Christoph Muellner <cmuell...@linux.com> The cmo.prefetch instructions are nops for QEMU (no emulation of the memory hierarchy, no illegal instructions, no permission faults, no traps).
Add a comment noting where they would be decoded in case cbo.prefetch instructions become relevant in the future. Co-developed-by: Philipp Tomsich <philipp.toms...@vrull.eu> Signed-off-by: Christoph Muellner <cmuell...@linux.com> Signed-off-by: Daniel Henrique Barboza <dbarb...@ventanamicro.com> Reviewed-by: Richard Henderson <richard.hender...@linaro.org> Reviewed-by: Weiwei Li <liwei...@iscas.ac.cn> Message-ID: <20230224132536.552293-5-dbarb...@ventanamicro.com> Signed-off-by: Palmer Dabbelt <pal...@rivosinc.com> --- target/riscv/insn32.decode | 1 + 1 file changed, 1 insertion(+) diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode index 282e41aa3e..73d5d1b045 100644 --- a/target/riscv/insn32.decode +++ b/target/riscv/insn32.decode @@ -134,6 +134,7 @@ addi ............ ..... 000 ..... 0010011 @i slti ............ ..... 010 ..... 0010011 @i sltiu ............ ..... 011 ..... 0010011 @i xori ............ ..... 100 ..... 0010011 @i +# cbo.prefetch_{i,r,m} instructions are ori with rd=x0 and not decoded. ori ............ ..... 110 ..... 0010011 @i andi ............ ..... 111 ..... 0010011 @i slli 00000. ...... ..... 001 ..... 0010011 @sh -- 2.39.2