panfrost: Add draw-time merge helper

The famous GenXML "OR" trick. Will be *essential* to packing RSDs.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10869>

diff --git a/src/panfrost/lib/gen_pack.py b/src/panfrost/lib/gen_pack.py
index fbb08a4..8f9411a 100644 (file)
--- a/src/panfrost/lib/gen_pack.py
+++ b/src/panfrost/lib/gen_pack.py
@@ -169,6 +169,12 @@ __gen_unpack_padded(const uint8_t *restrict cl, uint32_t start, uint32_t end)
 #define pan_section_print(fp, A, S, var, indent)                          \\
         MALI_ ## A ## _SECTION_ ## S ## _print(fp, &(var), indent)
 
+#define pan_merge(packed1, packed2, type) \
+        do { \
+                for (unsigned i = 0; i < (MALI_ ## type ## _LENGTH / 4); ++i) \
+                        packed1.opaque[i] |= packed2.opaque[i]; \
+        } while(0)
+
 #define mali_pixel_format_print_v6(fp, format) \\
     fprintf(fp, "%*sFormat (v6): %s%s%s %s%s%s%s\\n", indent, "", \\
         mali_format_as_str((enum mali_format)((format >> 12) & 0xFF)), \\