Mesa (master): anv: prepare formats to handle disjoints sets

[Lionel Landwerlin]

Module: Mesa
Branch: master
Commit: 18914715d1c2dc5861c9b76aa98c6b1debf5b711
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=18914715d1c2dc5861c9b76aa98c6b1debf5b711

Author: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
Date:   Mon Sep 25 18:10:20 2017 +0100

anv: prepare formats to handle disjoints sets

Newer format enums start at offset 1000000000, making it impossible to
have them all in one table. This change splits the formats into sets
that we then access through indirection.

v2: rename format_extract to vk_to_anv_format (Chad/Jason)

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
Reviewed-by: Jason Ekstrand <jason at jlekstrand.net>

---

 src/intel/vulkan/anv_formats.c | 37 +++++++++++++++++++++++++++----------
 1 file changed, 27 insertions(+), 10 deletions(-)

diff --git a/src/intel/vulkan/anv_formats.c b/src/intel/vulkan/anv_formats.c
index 049ffe17ac..9db80ba14e 100644
--- a/src/intel/vulkan/anv_formats.c
+++ b/src/intel/vulkan/anv_formats.c
@@ -45,7 +45,7 @@
 #define RGB1 _ISL_SWIZZLE(RED, GREEN, BLUE, ONE)
 
 #define swiz_fmt(__vk_fmt, __hw_fmt, __swizzle)     \
-   [__vk_fmt] = { \
+   [VK_ENUM_OFFSET(__vk_fmt)] = { \
       .isl_format = __hw_fmt, \
       .swizzle = __swizzle, \
    }
@@ -58,7 +58,7 @@
  * other.  The reason for this is that, for packed formats, the ISL (and
  * bspec) names are in LSB -> MSB order while VK formats are MSB -> LSB.
  */
-static const struct anv_format anv_formats[] = {
+static const struct anv_format main_formats[] = {
    fmt(VK_FORMAT_UNDEFINED,               ISL_FORMAT_UNSUPPORTED),
    fmt(VK_FORMAT_R4G4_UNORM_PACK8,        ISL_FORMAT_UNSUPPORTED),
    fmt(VK_FORMAT_R4G4B4A4_UNORM_PACK16,   ISL_FORMAT_A4B4G4R4_UNORM),
@@ -251,13 +251,30 @@ static const struct anv_format anv_formats[] = {
 
 #undef fmt
 
+static const struct {
+   const struct anv_format *formats;
+   uint32_t n_formats;
+} anv_formats[] = {
+   [0] = { .formats = main_formats, .n_formats = ARRAY_SIZE(main_formats), },
+};
+
+static struct anv_format
+vk_to_anv_format(VkFormat vk_format)
+{
+   uint32_t enum_offset = VK_ENUM_OFFSET(vk_format);
+   uint32_t ext_number = VK_ENUM_EXTENSION(vk_format);
+
+   if (ext_number >= ARRAY_SIZE(anv_formats) ||
+       enum_offset >= anv_formats[ext_number].n_formats)
+      return (struct anv_format) { .isl_format = ISL_FORMAT_UNSUPPORTED };
+
+   return anv_formats[ext_number].formats[enum_offset];
+}
+
 static bool
 format_supported(VkFormat vk_format)
 {
-   if (vk_format >= ARRAY_SIZE(anv_formats))
-      return false;
-
-   return anv_formats[vk_format].isl_format != ISL_FORMAT_UNSUPPORTED;
+   return vk_to_anv_format(vk_format).isl_format != ISL_FORMAT_UNSUPPORTED;
 }
 
 /**
@@ -267,10 +284,10 @@ struct anv_format
 anv_get_format(const struct gen_device_info *devinfo, VkFormat vk_format,
                VkImageAspectFlags aspect, VkImageTiling tiling)
 {
-   if (!format_supported(vk_format))
-      return anv_formats[VK_FORMAT_UNDEFINED];
+   struct anv_format format = vk_to_anv_format(vk_format);
 
-   struct anv_format format = anv_formats[vk_format];
+   if (format.isl_format == ISL_FORMAT_UNSUPPORTED)
+      return format;
 
    if (aspect == VK_IMAGE_ASPECT_STENCIL_BIT) {
       assert(vk_format_aspects(vk_format) & VK_IMAGE_ASPECT_STENCIL_BIT);
@@ -553,7 +570,7 @@ anv_get_image_format_properties(
     *    * This field cannot be ASTC format if the Surface Type is SURFTYPE_1D.
     */
    if (info->type == VK_IMAGE_TYPE_1D &&
-       isl_format_is_compressed(anv_formats[info->format].isl_format)) {
+       isl_format_is_compressed(vk_to_anv_format(info->format).isl_format)) {
        goto unsupported;
    }