gallium/u_vbuf: simplify the first if statement in u_vbuf_upload_buffers

Acked-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Mathias Fröhlich <Mathias.Froehlich@web.de>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4153>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4153>

diff --git a/src/gallium/auxiliary/util/u_vbuf.c b/src/gallium/auxiliary/util/u_vbuf.c
index f88c92dd6ac3147267ab95a07534ec8ff7878925..f47d93ac3f1dd86e42b5202bad776425826a13fc 100644 (file)
--- a/src/gallium/auxiliary/util/u_vbuf.c
+++ b/src/gallium/auxiliary/util/u_vbuf.c
@@ -174,6 +174,7 @@ struct u_vbuf {
    /* The vertex buffer slot index where translated vertices have been
     * stored in. */
    unsigned fallback_vbs[VB_NUM];
+   unsigned fallback_vbs_mask;
 
    /* Which buffer is a user buffer. */
    uint32_t user_vb_mask; /* each bit describes a corresp. buffer */
@@ -556,6 +557,7 @@ u_vbuf_translate_find_free_vb_slots(struct u_vbuf *mgr,
       return FALSE;
 
    memset(fallback_vbs, ~0, sizeof(fallback_vbs));
+   mgr->fallback_vbs_mask = 0;
 
    /* Find free slots for each type if needed. */
    unused_vb_mask_orig = unused_vb_mask;
@@ -570,6 +572,7 @@ u_vbuf_translate_find_free_vb_slots(struct u_vbuf *mgr,
 
          index = ffs(unused_vb_mask) - 1;
          fallback_vbs[type] = index;
+         mgr->fallback_vbs_mask |= 1 << index;
          unused_vb_mask &= ~(1 << index);
          /*printf("found slot=%i for type=%i\n", index, type);*/
       }
@@ -581,6 +584,7 @@ u_vbuf_translate_find_free_vb_slots(struct u_vbuf *mgr,
       uint32_t index = ffs(unused_vb_mask_orig) - 1;
       /* When sharing one vertex buffer use per-vertex frequency for everything. */
       fallback_vbs[VB_VERTEX] = index;
+      mgr->fallback_vbs_mask = 1 << index;
       mask[VB_VERTEX] = mask[VB_VERTEX] | mask[VB_CONST] | mask[VB_INSTANCE];
       mask[VB_CONST] = 0;
       mask[VB_INSTANCE] = 0;
@@ -763,11 +767,11 @@ static void u_vbuf_translate_end(struct u_vbuf *mgr)
       if (vb != ~0u) {
          pipe_resource_reference(&mgr->real_vertex_buffer[vb].buffer.resource, NULL);
          mgr->fallback_vbs[i] = ~0;
-
-         /* This will cause the buffer to be unbound in the driver later. */
-         mgr->dirty_real_vb_mask |= 1 << vb;
       }
    }
+   /* This will cause the buffer to be unbound in the driver later. */
+   mgr->dirty_real_vb_mask |= mgr->fallback_vbs_mask;
+   mgr->fallback_vbs_mask = 0;
 }
 
 static void *
@@ -966,9 +970,7 @@ u_vbuf_upload_buffers(struct u_vbuf *mgr,
       unsigned instance_div, first, size, index_bit;
 
       /* Skip the buffers generated by translate. */
-      if (index == mgr->fallback_vbs[VB_VERTEX] ||
-          index == mgr->fallback_vbs[VB_INSTANCE] ||
-          index == mgr->fallback_vbs[VB_CONST]) {
+      if ((1 << index) & mgr->fallback_vbs_mask) {
          continue;
       }