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
