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-rw-r--r--src/mesa/drivers/dri/i965/brw_context.h8
-rw-r--r--src/mesa/drivers/dri/i965/brw_vs_emit.c6
2 files changed, 10 insertions, 4 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h
index ab0c78ff8f8..f3312360213 100644
--- a/src/mesa/drivers/dri/i965/brw_context.h
+++ b/src/mesa/drivers/dri/i965/brw_context.h
@@ -555,12 +555,12 @@ struct brw_context
GLuint nr_sf_entries;
GLuint nr_cs_entries;
- /* gen6 */
+ /* gen6:
+ * The length of each URB entry owned by the VS (or GS), as
+ * a number of 1024-bit (128-byte) rows. Should be >= 1.
+ */
GLuint vs_size;
/* GLuint gs_size; */
-/* GLuint clip_size; */
-/* GLuint sf_size; */
-/* GLuint cs_size; */
GLuint vs_start;
GLuint gs_start;
diff --git a/src/mesa/drivers/dri/i965/brw_vs_emit.c b/src/mesa/drivers/dri/i965/brw_vs_emit.c
index acacf374b75..96150ecc377 100644
--- a/src/mesa/drivers/dri/i965/brw_vs_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_vs_emit.c
@@ -437,8 +437,14 @@ static void brw_vs_alloc_regs( struct brw_vs_compile *c )
if (c->key.nr_userclip)
header_regs += 2;
+ /* Each attribute is 16 bytes (1 vec4), so dividing by 8 gives us the
+ * number of 128-byte (1024-bit) units.
+ */
c->prog_data.urb_entry_size = (attributes_in_vue + header_regs + 7) / 8;
} else if (intel->gen == 5)
+ /* Each attribute is 16 bytes (1 vec4), so dividing by 4 gives us the
+ * number of 64-byte (512-bit) units.
+ */
c->prog_data.urb_entry_size = (attributes_in_vue + 6 + 3) / 4;
else
c->prog_data.urb_entry_size = (attributes_in_vue + 2 + 3) / 4;