Crash while running tests

[Shadlock0133]

• make test-sim
• make test-sys
• rv-jit build/riscv64-unknown-elf/bin/test-dhrystone

All of them crash with an error message illegal hardware instruction (core dumped)

I'm guessing jit emits instructions from sse3 or higher.

Cpu: Intel(R) Core(TM)2 Duo CPU T5900 @ 2.20GHz with flags fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl cpuid aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm lahf_lm pti dtherm

Edit: It looks like it crashes here on __asm__ volatile ("rdtscp\n" : "=a" (a), "=d" (d));

[michaeljclark]

On 21/10/2018, at 7:22 AM, Shadlock0133 ***@***.***> wrote: make test-sim make test-sys rv-jit build/riscv64-unknown-elf/bin/test-dhrystone All of them crash with an error message illegal hardware instruction (core dumped) I'm guessing jit emits instructions from sse3 or higher. Cpu: Intel(R) Core(TM)2 Duo CPU T5900 @ 2.20GHz with flags fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl cpuid aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm lahf_lm pti dtherm

It is most likely RDTSCP. The use of RDTSCP can be disabled at compile time by adding -DX86_NO_RDTSCP to CFLAGS in the Makefile. It would be possible to do a runtime initialisation check of CPUID.80000001H:EDX.RDTSCP[bit 27] and fall back to RDTSC.

[cheery]

I'm also getting this with Intel(R) Core(TM)2 Quad CPU Q9550 @ 2.83GHz. It's working with the CFLAGS modification.

Also had to add "$@" into the end of the bin/ -scripts to have them run in the first place.

$ bin/rv-jit build/riscv64-unknown-elf/bin/test-dhrystone
Dhrystone(1.1-mc), 10000000 passes, 542163 microseconds, 10476 DMIPS