On Fri, Jan 7, 2022 at 7:04 AM Frédéric Pétrot
<frederic.petrot@univ-grenoble-alpes.fr> wrote:
This patch adds the support of the '-cpu rv128' option to
qemu-system-riscv64 so that we can indicate that we want to run rv128
executables.
Still, there is no support for 128-bit insns at that stage so qemu fails
miserably (as expected) if launched with this option.
Signed-off-by: Frédéric Pétrot <frederic.petrot@univ-grenoble-alpes.fr>
Co-authored-by: Fabien Portas <fabien.portas@grenoble-inp.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
---
include/disas/dis-asm.h | 1 +
target/riscv/cpu.h | 1 +
disas/riscv.c | 5 +++++
target/riscv/cpu.c | 20 ++++++++++++++++++++
target/riscv/gdbstub.c | 5 +++++
5 files changed, 32 insertions(+)
diff --git a/include/disas/dis-asm.h b/include/disas/dis-asm.h
index 08e1beec85..102a1e7f50 100644
--- a/include/disas/dis-asm.h
+++ b/include/disas/dis-asm.h
@@ -459,6 +459,7 @@ int print_insn_nios2(bfd_vma, disassemble_info*);
int print_insn_xtensa (bfd_vma, disassemble_info*);
int print_insn_riscv32 (bfd_vma, disassemble_info*);
int print_insn_riscv64 (bfd_vma, disassemble_info*);
+int print_insn_riscv128 (bfd_vma, disassemble_info*);
int print_insn_rx(bfd_vma, disassemble_info *);
int print_insn_hexagon(bfd_vma, disassemble_info *);
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index fa5d238530..efe481f5fb 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -38,6 +38,7 @@
#define TYPE_RISCV_CPU_ANY RISCV_CPU_TYPE_NAME("any")
#define TYPE_RISCV_CPU_BASE32 RISCV_CPU_TYPE_NAME("rv32")
#define TYPE_RISCV_CPU_BASE64 RISCV_CPU_TYPE_NAME("rv64")
+#define TYPE_RISCV_CPU_BASE128 RISCV_CPU_TYPE_NAME("rv128")
As this series only adds partial support for 128-bit support, I think
we should probably change this to "x-rv128". That way we indicate to
users that it is experimental. That allows us more flexibility in the
future to have breaking changes and will hopefully avoid confusion
about the current state. What do you think? I can just make the change
when I apply the patches.