[PATCH vkd3d 05/12] vkd3d-shader/hlsl: Introduce add_load_index().

[Zebediah Figura]

On 7/1/22 16:24, Francisco Casas wrote:
> +struct hlsl_ir_node *hlsl_new_offset_from_path_index(struct hlsl_ctx *ctx, struct hlsl_block *block,
> +        struct hlsl_type *type, struct hlsl_ir_node *offset, struct hlsl_ir_node *idx,
> +        const struct vkd3d_shader_location *loc)
> +{
> +    struct hlsl_ir_node *idx_offset = NULL;
> +    struct hlsl_ir_constant *c;
> +
> +    list_init(&block->instrs);
> +
> +    switch (type->type)
> +    {
> +        case HLSL_CLASS_VECTOR:
> +        {
> +            idx_offset = idx;
> +            break;
> +        }
> +
> +        case HLSL_CLASS_MATRIX:
> +        {
> +            if (!(c = hlsl_new_uint_constant(ctx, 4, loc)))
> +                return NULL;
> +            list_add_tail(&block->instrs, &c->node.entry);
> +
> +            if (!(idx_offset = hlsl_new_binary_expr(ctx, HLSL_OP2_MUL, &c->node, idx)))
> +                return NULL;
> +            list_add_tail(&block->instrs, &idx_offset->entry);
> +
> +            break;
> +        }
> +
> +        case HLSL_CLASS_ARRAY:
> +        {
> +            unsigned int size = hlsl_type_get_array_element_reg_size(type->e.array.type);
> +
> +            if (!(c = hlsl_new_uint_constant(ctx, size, loc)))
> +                return NULL;
> +            list_add_tail(&block->instrs, &c->node.entry);
> +
> +            if (!(idx_offset = hlsl_new_binary_expr(ctx, HLSL_OP2_MUL, &c->node, idx)))
> +                return NULL;
> +            list_add_tail(&block->instrs, &idx_offset->entry);
> +
> +            break;
> +        }
> +
> +        case HLSL_CLASS_STRUCT:
> +        {
> +            unsigned int field_i = hlsl_ir_constant(idx)->value[0].u;

Erf, that is awkward. Well, it's a temporary measure, and avoiding it 
would probably be worse...

> +            struct hlsl_struct_field *field = &type->e.record.fields[field_i];
> +
> +            if (!(c = hlsl_new_uint_constant(ctx, field->reg_offset, loc)))
> +                return NULL;
> +            list_add_tail(&block->instrs, &c->node.entry);
> +
> +            idx_offset = &c->node;
> +
> +            break;
> +        }
> +
> +        default:
> +        {
> +            assert(0);
> +            return NULL;
> +        }
> +    }
> +
> +    if (offset)
> +    {
> +        if (!(idx_offset = hlsl_new_binary_expr(ctx, HLSL_OP2_ADD, offset, idx_offset)))
> +            return NULL;
> +        list_add_tail(&block->instrs, &idx_offset->entry);
> +    }
> +
> +    return idx_offset;
> +}
> +