mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-27 13:30:52 +00:00
c8cf47a946
In cpu_loop_exec_tb(), we decide whether to look for a TB with exactly insns_left instructions in it using the condition (!cpu->icount_extra && insns_left > 0 && insns_left < tb->icount) The check for icount_extra == 0 is unnecessary, because we just set insns_left = MIN(0xffff, cpu->icount_budget); icount_extra = icount_budget - insns_left; and so icount_extra can only be non-zero if icount_budget > 0xffff and insns_left == 0xffff. But in that case insns_left >= tb->icount because 0xffff is much larger than TCG_MAX_INSNS, so the condition will be false anyway. Remove the unnecessary check, and instead assert: * that we are only going to execute a partial TB here if the icount budget has run out (ie icount_extra == 0) * that the number of insns we're going to execute does fit into the CF_COUNT_MASK Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20210725174405.24568-3-peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> |
||
|---|---|---|
| .. | ||
| hvf | ||
| kvm | ||
| qtest | ||
| stubs | ||
| tcg | ||
| xen | ||
| accel-common.c | ||
| accel-softmmu.c | ||
| accel-softmmu.h | ||
| accel-user.c | ||
| dummy-cpus.c | ||
| Kconfig | ||
| meson.build | ||