[RISCV] Move rva23 evl builder over to cross-compile and execute under qemu-system setup #358
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…r qemu-system setup This also moves to `prefer-predicate-over-epilogue=predicate-else-scalar-epilogue`. As the buildbot is on staging only and already has some failures, I think it's ok to make both changes at once rather than carefully staging it.
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This was referenced Jan 22, 2025
lukel97
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Jan 22, 2025
| "set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)"], | ||
| env={ | ||
| "BB_IMG_DIR": util.Interpolate("%(prop:builddir)s/.."), | ||
| "BB_QEMU_CPU": "zba=true,zbb=true,zbc=false,zbs=true,zfhmin=true,v=true,vext_spec=v1.0,zkt=true,zvfhmin=true,zvbb=true,zvkt=true,zihintntl=true,zicond=true,zcb=true,zfa=true,zawrs=true,rvv_ta_all_1s=true,rvv_ma_all_1s=true,rvv_vl_half_avl=true", |
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Do we also need to enable zimop +zcmop? Can clang emit those currently?
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I don't believe we will, but I'll enable them for completeness - thanks. They weren't supported at the time I composed that command line, but they were added in qemu 9.1.0.
Thanks!
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A patch is under review for rva23 support in QEMU, so I'll additionally add a TODO here to switch over to that shorthand once it's merged and in a released qemu version https://lore.kernel.org/qemu-devel/20250115184316.2344583-1-dbarboza@ventanamicro.com/
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This also moves to
prefer-predicate-over-epilogue=predicate-else-scalar-epilogue. As the buildbot is on staging only and already has some failures, I think it's ok to make both changes at once rather than carefully staging it.