[Mesa-dev] [PATCH 06/15] vulkan: util: add macros to extract extension/offset number from enums

[Jason Ekstrand]

On Fri, Sep 15, 2017 at 7:10 AM, Lionel Landwerlin <
lionel.g.landwerlin at intel.com> wrote:

> Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
> ---
>  src/vulkan/util/vk_util.h | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/src/vulkan/util/vk_util.h b/src/vulkan/util/vk_util.h
> index 2ed601f881e..a152984d14d 100644
> --- a/src/vulkan/util/vk_util.h
> +++ b/src/vulkan/util/vk_util.h
> @@ -199,4 +199,11 @@ __vk_find_struct(void *start, VkStructureType sType)
>
>  uint32_t vk_get_driver_version(void);
>
> +#define VK_EXT_OFFSET (1000000000UL)
> +#define vk_enum_extension(__enum) \
> +   ((__enum) >= VK_EXT_OFFSET ? ((((__enum) - VK_EXT_OFFSET) / 1000UL) +
> 1) : 0)
> +#define vk_enum_offset(__enum) \
> +   ((__enum) >= VK_EXT_OFFSET ? \
> +    ((__enum) - VK_EXT_OFFSET - ((vk_enum_extension(__enum) - 1) * 1000))
> : (__enum))
>

Can't this just be ((__enum) >= VK_EXT_OFFSET ? ((__enum) % 1000) : 0)


> +
>  #endif /* VK_UTIL_H */
> --
> 2.14.1
>
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