a9814e3e08
The set of instructions that require decode_save_opc for unwinding is really fairly small -- only insns that can raise ILLEGAL_INSN at runtime. This includes CSR, anything that uses a *new* fp rounding mode, and many privileged insns. Since unwind info is stored as the difference from the previous insn, storing a 0 for most insns minimizes the size of the unwind info. Booting a debian kernel image to the missing rootfs panic yields - gen code size 22226819/1026886656 + gen code size 21601907/1026886656 on 41k TranslationBlocks, a savings of 610kB or a bit less than 3%. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20220604231004.49990-4-richard.henderson@linaro.org> Signed-off-by: Alistair Francis <alistair.francis@wdc.com> |
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.. | ||
insn_trans | ||
arch_dump.c | ||
bitmanip_helper.c | ||
common-semi-target.h | ||
cpu_bits.h | ||
cpu_helper.c | ||
cpu_user.h | ||
cpu-param.h | ||
cpu.c | ||
cpu.h | ||
crypto_helper.c | ||
csr.c | ||
debug.c | ||
debug.h | ||
fpu_helper.c | ||
gdbstub.c | ||
helper.h | ||
insn16.decode | ||
insn32.decode | ||
instmap.h | ||
internals.h | ||
Kconfig | ||
kvm_riscv.h | ||
kvm-stub.c | ||
kvm.c | ||
m128_helper.c | ||
machine.c | ||
meson.build | ||
monitor.c | ||
op_helper.c | ||
pmp.c | ||
pmp.h | ||
sbi_ecall_interface.h | ||
trace-events | ||
trace.h | ||
translate.c | ||
vector_helper.c | ||
XVentanaCondOps.decode |