Re: [Qemu-arm] [PATCH v3 1/1] target-arm: Use Neon for zero checking

[Peter Maydell]

On 29 June 2016 at 09:47,  <address@hidden> wrote:
> From: Vijay <address@hidden>
>
> Use Neon instructions to perform zero checking of
> buffer. This is helps in reducing total migration time.

> diff --git a/util/cutils.c b/util/cutils.c
> index 5830a68..4779403 100644
> --- a/util/cutils.c
> +++ b/util/cutils.c
> @@ -184,6 +184,13 @@ int qemu_fdatasync(int fd)
>  #define SPLAT(p)       _mm_set1_epi8(*(p))
>  #define ALL_EQ(v1, v2) (_mm_movemask_epi8(_mm_cmpeq_epi8(v1, v2)) == 0xFFFF)
>  #define VEC_OR(v1, v2) (_mm_or_si128(v1, v2))
> +#elif __aarch64__
> +#include "arm_neon.h"
> +#define VECTYPE        uint64x2_t
> +#define ALL_EQ(v1, v2) \
> +        ((vgetq_lane_u64(v1, 0) == vgetq_lane_u64(v2, 0)) && \
> +         (vgetq_lane_u64(v1, 1) == vgetq_lane_u64(v2, 1)))
> +#define VEC_OR(v1, v2) ((v1) | (v2))

Should be '#elif defined(__aarch64__)'. I have made this
tweak and put this patch in target-arm.next.

thanks
-- PMM