From: Richard Henderson <richard.hender...@linaro.org> If vd == vm, copy vm to scratch, so that we can pre-zero the output and still access the gather indicies.
Cc: qemu-sta...@nongnu.org Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1612 Signed-off-by: Richard Henderson <richard.hender...@linaro.org> Message-id: 20230504104232.1877774-1-richard.hender...@linaro.org Reviewed-by: Peter Maydell <peter.mayd...@linaro.org> Signed-off-by: Peter Maydell <peter.mayd...@linaro.org> --- target/arm/tcg/sve_helper.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/target/arm/tcg/sve_helper.c b/target/arm/tcg/sve_helper.c index ccf5e5beca2..0097522470e 100644 --- a/target/arm/tcg/sve_helper.c +++ b/target/arm/tcg/sve_helper.c @@ -6727,6 +6727,7 @@ void sve_ldff1_z(CPUARMState *env, void *vd, uint64_t *vg, void *vm, intptr_t reg_off; SVEHostPage info; target_ulong addr, in_page; + ARMVectorReg scratch; /* Skip to the first true predicate. */ reg_off = find_next_active(vg, 0, reg_max, esz); @@ -6736,6 +6737,11 @@ void sve_ldff1_z(CPUARMState *env, void *vd, uint64_t *vg, void *vm, return; } + /* Protect against overlap between vd and vm. */ + if (unlikely(vd == vm)) { + vm = memcpy(&scratch, vm, reg_max); + } + /* * Probe the first element, allowing faults. */ -- 2.34.1
