[PATCH v5 vkd3d 08/13] vkd3d-shader/hlsl: Add support for sm4 instruction modifiers.

[Giovanni Mascellani]

Signed-off-by: Giovanni Mascellani <gmascellani at codeweavers.com>

On 22/12/21 00:08, Zebediah Figura wrote:
> From: Francisco Casas <fcasas at codeweavers.com>
> 
> Signed-off-by: Francisco Casas <fcasas at codeweavers.com>
> Signed-off-by: Zebediah Figura <zfigura at codeweavers.com>
> ---
> v5: Replaced the FIXME in sm4_encode_instruction_modifier() with an assert();
> avoid nameless unions; minor stylistic tweaks.
> 
>   libs/vkd3d-shader/hlsl_sm4.c | 53 ++++++++++++++++++++++++++++++++++++
>   1 file changed, 53 insertions(+)
> 
> diff --git a/libs/vkd3d-shader/hlsl_sm4.c b/libs/vkd3d-shader/hlsl_sm4.c
> index e2b2d6dfa..73024e3bb 100644
> --- a/libs/vkd3d-shader/hlsl_sm4.c
> +++ b/libs/vkd3d-shader/hlsl_sm4.c
> @@ -727,6 +727,44 @@ static enum vkd3d_sm4_resource_type sm4_resource_dimension(const struct hlsl_typ
>       }
>   }
>   
> +struct sm4_instruction_modifier
> +{
> +    enum vkd3d_sm4_instruction_modifier type;
> +
> +    union
> +    {
> +        struct
> +        {
> +            int u, v, w;
> +        } aoffimmi;
> +    } u;
> +};
> +
> +static uint32_t sm4_encode_instruction_modifier(const struct sm4_instruction_modifier *imod)
> +{
> +    uint32_t word = 0;
> +
> +    word |= VKD3D_SM4_MODIFIER_MASK & imod->type;
> +
> +    switch (imod->type)
> +    {
> +        case VKD3D_SM4_MODIFIER_AOFFIMMI:
> +            assert(-8 <= imod->u.aoffimmi.u && imod->u.aoffimmi.u <= 7);
> +            assert(-8 <= imod->u.aoffimmi.v && imod->u.aoffimmi.v <= 7);
> +            assert(-8 <= imod->u.aoffimmi.w && imod->u.aoffimmi.w <= 7);
> +            word |= ((uint32_t)imod->u.aoffimmi.u & 0xf) << VKD3D_SM4_AOFFIMMI_U_SHIFT;
> +            word |= ((uint32_t)imod->u.aoffimmi.v & 0xf) << VKD3D_SM4_AOFFIMMI_V_SHIFT;
> +            word |= ((uint32_t)imod->u.aoffimmi.w & 0xf) << VKD3D_SM4_AOFFIMMI_W_SHIFT;
> +            break;
> +
> +        default:
> +            assert(0);
> +            break;
> +    }
> +
> +    return word;
> +}
> +
>   struct sm4_register
>   {
>       enum vkd3d_sm4_register_type type;
> @@ -741,6 +779,9 @@ struct sm4_instruction
>   {
>       enum vkd3d_sm4_opcode opcode;
>   
> +    struct sm4_instruction_modifier modifiers[1];
> +    unsigned int modifier_count;
> +
>       struct sm4_dst_register
>       {
>           struct sm4_register reg;
> @@ -939,6 +980,7 @@ static void write_sm4_instruction(struct vkd3d_bytecode_buffer *buffer, const st
>       uint32_t token = instr->opcode;
>       unsigned int size = 1, i, j;
>   
> +    size += instr->modifier_count;
>       for (i = 0; i < instr->dst_count; ++i)
>           size += sm4_register_order(&instr->dsts[i].reg);
>       for (i = 0; i < instr->src_count; ++i)
> @@ -946,8 +988,19 @@ static void write_sm4_instruction(struct vkd3d_bytecode_buffer *buffer, const st
>       size += instr->idx_count;
>   
>       token |= (size << VKD3D_SM4_INSTRUCTION_LENGTH_SHIFT);
> +
> +    if (instr->modifier_count > 0)
> +        token |= VKD3D_SM4_INSTRUCTION_MODIFIER;
>       put_u32(buffer, token);
>   
> +    for (i = 0; i < instr->modifier_count; ++i)
> +    {
> +        token = sm4_encode_instruction_modifier(&instr->modifiers[i]);
> +        if (instr->modifier_count > i + 1)
> +            token |= VKD3D_SM4_INSTRUCTION_MODIFIER;
> +        put_u32(buffer, token);
> +    }
> +
>       for (i = 0; i < instr->dst_count; ++i)
>       {
>           token = sm4_encode_register(&instr->dsts[i].reg);