Re: [Qemu-devel] [PATCH v4 0/9] POWER9 TCG enablements - part4

[Nikunj A Dadhania]

Nikunj A Dadhania <address@hidden> writes:

> This series contains 7 new instructions for POWER9 ISA3.0
> Use newer qemu load/store tcg helpers and optimize stxvw4x and lxvw4x.
>
> GCC was adding epilogue for every VSX instructions causing change in 
> behaviour. For testing the load vector instructions used mfvsrld/mfvsrd 
> for loading vsr to register. And for testing store vector, used mtvsrdd 
> instructions. This helped in getting rid of the epilogue added by gcc. Tried 
> adding the test cases to kvm-unit-tests, but executing vsx instructions 
> results in cpu exception. Will debug that later. I will send the test code 
> and steps to execute as reply to this email.

Source code for stxv_x.c and lxv_x.c is attached and following are the 
steps to use them:

Compile using IBM Advance toolchain[1]:
=======================================
/opt/at10.0/bin/powerpc64-linux-gnu-gcc -static -O3 lxv_x.c -o be_lxv_x
/opt/at10.0/bin/powerpc64-linux-gnu-gcc -static -O3 stxv_x.c -o be_stxv_x
/opt/at10.0/bin/powerpc64le-linux-gnu-gcc -static -O3 lxv_x.c -o le_lxv_x
/opt/at10.0/bin/powerpc64le-linux-gnu-gcc -static -O3 stxv_x.c -o le_stxv_x

Run following for testing the instructions:
===========================================

for i in lxv_x stxv_x
do
    echo "Running ... $i"
    echo ">>>>>>>>>>>>>>>> LE LE LE >>>>>>>>>>>>>>"
    ../qemu/ppc64le-linux-user/qemu-ppc64le   -cpu POWER9 le_${i}
    echo ">>>>>>>>>>>>>>>> BE BE BE >>>>>>>>>>>>>>"
    ../qemu/ppc64-linux-user/qemu-ppc64   -cpu POWER9 be_${i}
    echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>"
done

Regards
Nikunj

1. ftp://ftp.unicamp.br/pub/linuxpatch/toolchain/at/redhat/Fedora22

stxv_x.c
Description: stxv_x.c

lxv_x.c
Description: lxv_x.c