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| author | Richard Henderson <richard.henderson@linaro.org> | 2022-06-04 23:10:04 +0000 |
|---|---|---|
| committer | Alistair Francis <alistair@alistair23.me> | 2022-07-03 10:03:20 +1000 |
| commit | a9814e3e08d2aacbd9018c36c77c2fb652537848 (patch) | |
| tree | 1eb64b2e8e06c4847aab6bcb433247202cdbd43d /hw/display/vhost-user-gpu.c | |
| parent | 5dacdbaeaf7874d361dc95d07e30c86b72c9693d (diff) | |
| download | qemu-a9814e3e08d2aacbd9018c36c77c2fb652537848.zip qemu-a9814e3e08d2aacbd9018c36c77c2fb652537848.tar.gz qemu-a9814e3e08d2aacbd9018c36c77c2fb652537848.tar.bz2 | |
target/riscv: Minimize the calls to decode_save_opc
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>
Diffstat (limited to 'hw/display/vhost-user-gpu.c')
0 files changed, 0 insertions, 0 deletions