Re: [Qemu-devel] [PATCH v1 2/3] target-ppc: implement vnegw/d instructions

[David Gibson]

On Wed, Oct 12, 2016 at 10:38:52AM +0530, Nikunj A Dadhania wrote:
> Vector Integer Negate Instructions:
> 
> vnegw: Vector Negate Word
> vnegd: Vector Negate Doubleword
> 
> Signed-off-by: Nikunj A Dadhania <address@hidden>
> ---
>  target-ppc/helper.h                 |  2 ++
>  target-ppc/int_helper.c             | 12 ++++++++++++
>  target-ppc/translate/vmx-impl.inc.c |  2 ++
>  target-ppc/translate/vmx-ops.inc.c  |  2 ++
>  4 files changed, 18 insertions(+)
> 
> diff --git a/target-ppc/helper.h b/target-ppc/helper.h
> index 04c6421..5fcc546 100644
> --- a/target-ppc/helper.h
> +++ b/target-ppc/helper.h
> @@ -272,6 +272,8 @@ DEF_HELPER_2(vextsh2w, void, avr, avr)
>  DEF_HELPER_2(vextsb2d, void, avr, avr)
>  DEF_HELPER_2(vextsh2d, void, avr, avr)
>  DEF_HELPER_2(vextsw2d, void, avr, avr)
> +DEF_HELPER_2(vnegw, void, avr, avr)
> +DEF_HELPER_2(vnegd, void, avr, avr)
>  DEF_HELPER_2(vupkhpx, void, avr, avr)
>  DEF_HELPER_2(vupklpx, void, avr, avr)
>  DEF_HELPER_2(vupkhsb, void, avr, avr)
> diff --git a/target-ppc/int_helper.c b/target-ppc/int_helper.c
> index 5aee0a8..7446e4e 100644
> --- a/target-ppc/int_helper.c
> +++ b/target-ppc/int_helper.c
> @@ -1949,6 +1949,18 @@ VEXT_SIGNED(vextsh2d, s64, UINT16_MAX, int16_t, 
> int64_t)
>  VEXT_SIGNED(vextsw2d, s64, UINT32_MAX, int32_t, int64_t)
>  #undef VEXT_SIGNED
>  
> +#define VNEG(name, element, mask)                                   \

The mask parameter appears to be unused.

> +void helper_##name(ppc_avr_t *r, ppc_avr_t *b)                      \
> +{                                                                   \
> +    int i;                                                          \
> +    VECTOR_FOR_INORDER_I(i, element) {                              \
> +        r->element[i] = -b->element[i];                             \
> +    }                                                               \
> +}
> +VNEG(vnegw, s32, UINT32_MAX)
> +VNEG(vnegd, s64, UINT64_MAX)
> +#undef VNEG
> +
>  #define VSPLTI(suffix, element, splat_type)                     \
>      void helper_vspltis##suffix(ppc_avr_t *r, uint32_t splat)   \
>      {                                                           \
> diff --git a/target-ppc/translate/vmx-impl.inc.c 
> b/target-ppc/translate/vmx-impl.inc.c
> index c8998f3..563f101 100644
> --- a/target-ppc/translate/vmx-impl.inc.c
> +++ b/target-ppc/translate/vmx-impl.inc.c
> @@ -815,6 +815,8 @@ GEN_VXFORM_NOA(vclzb, 1, 28)
>  GEN_VXFORM_NOA(vclzh, 1, 29)
>  GEN_VXFORM_NOA(vclzw, 1, 30)
>  GEN_VXFORM_NOA(vclzd, 1, 31)
> +GEN_VXFORM_NOA_2(vnegw, 1, 24, 6)
> +GEN_VXFORM_NOA_2(vnegd, 1, 24, 7)
>  GEN_VXFORM_NOA_2(vextsb2w, 1, 24, 16)
>  GEN_VXFORM_NOA_2(vextsh2w, 1, 24, 17)
>  GEN_VXFORM_NOA_2(vextsb2d, 1, 24, 24)
> diff --git a/target-ppc/translate/vmx-ops.inc.c 
> b/target-ppc/translate/vmx-ops.inc.c
> index 68cba3e..ab64ab2 100644
> --- a/target-ppc/translate/vmx-ops.inc.c
> +++ b/target-ppc/translate/vmx-ops.inc.c
> @@ -215,6 +215,8 @@ GEN_VXFORM_DUAL_INV(vspltish, vinserth, 6, 13, 
> 0x00000000, 0x100000,
>  GEN_VXFORM_DUAL_INV(vspltisw, vinsertw, 6, 14, 0x00000000, 0x100000,
>                                                 PPC_ALTIVEC),
>  GEN_VXFORM_300_EXT(vinsertd, 6, 15, 0x100000),
> +GEN_VXFORM_300_EO(vnegw, 0x01, 0x18, 0x06),
> +GEN_VXFORM_300_EO(vnegd, 0x01, 0x18, 0x07),
>  GEN_VXFORM_300_EO(vextsb2w, 0x01, 0x18, 0x10),
>  GEN_VXFORM_300_EO(vextsh2w, 0x01, 0x18, 0x11),
>  GEN_VXFORM_300_EO(vextsb2d, 0x01, 0x18, 0x18),

-- 
David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!
http://www.ozlabs.org/~dgibson

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