cell: more efficient state emit for textures/samplers

src/gallium/drivers/cell/ppu/cell_context.h

@@ -121,6 +121,8 @@ struct cell_context
    uint *tex_map;
 
    uint dirty;
+   uint dirty_textures;  /* bitmask of texture units */
+   uint dirty_samplers;  /* bitmask of sampler units */
 
    /** Cache of code generated for per-fragment ops */
    struct keymap *fragment_ops_cache;

src/gallium/drivers/cell/ppu/cell_pipe_state.c

@@ -212,17 +212,24 @@ cell_bind_sampler_states(struct pipe_context *pipe,
                          unsigned num, void **samplers)
 {
    struct cell_context *cell = cell_context(pipe);
+   uint i, changed = 0x0;
 
    assert(num <= CELL_MAX_SAMPLERS);
 
    draw_flush(cell->draw);
 
-   memcpy(cell->sampler, samplers, num * sizeof(void *));
-   memset(&cell->sampler[num], 0, (CELL_MAX_SAMPLERS - num) *
-          sizeof(void *));
-   cell->num_samplers = num;
+   for (i = 0; i < CELL_MAX_SAMPLERS; i++) {
+      struct pipe_sampler_state *new_samp = i < num ? samplers[i] : NULL;
+      if (cell->sampler[i] != new_samp) {
+         cell->sampler[i] = new_samp;
+         changed |= (1 << i);
+      }
+   }
 
-   cell->dirty |= CELL_NEW_SAMPLER;
+   if (changed) {
+      cell->dirty |= CELL_NEW_SAMPLER;
+      cell->dirty_samplers |= changed;
+   }
 }
 
 
@@ -240,25 +247,23 @@ cell_set_sampler_textures(struct pipe_context *pipe,
                           unsigned num, struct pipe_texture **texture)
 {
    struct cell_context *cell = cell_context(pipe);
-   uint i;
+   uint i, changed = 0x0;
 
    assert(num <= CELL_MAX_SAMPLERS);
 
-   /* Check for no-op */
-   if (num == cell->num_textures &&
-       !memcmp(cell->texture, texture, num * sizeof(struct pipe_texture *)))
-      return;
-
-   draw_flush(cell->draw);
-
    for (i = 0; i < CELL_MAX_SAMPLERS; i++) {
-      struct pipe_texture *tex = i < num ? texture[i] : NULL;
-
-      pipe_texture_reference((struct pipe_texture **) &cell->texture[i], tex);
+      struct pipe_texture *new_tex = i < num ? texture[i] : NULL;
+      if ((struct pipe_texture *) cell->texture[i] != new_tex) {
+         pipe_texture_reference((struct pipe_texture **) &cell->texture[i],
+                                new_tex);
+         changed |= (1 << i);
+      }
    }
-   cell->num_textures = num;
 
-   cell->dirty |= CELL_NEW_TEXTURE;
+   if (changed) {
+      cell->dirty |= CELL_NEW_TEXTURE;
+      cell->dirty_textures |= changed;
+   }
 }
 
 

src/gallium/drivers/cell/ppu/cell_state_emit.c

@@ -201,44 +201,50 @@ cell_emit_state(struct cell_context *cell)
    if (cell->dirty & CELL_NEW_SAMPLER) {
       uint i;
       for (i = 0; i < CELL_MAX_SAMPLERS; i++) {
-         if (cell->sampler[i]) {
-            struct cell_command_sampler *sampler
-               = cell_batch_alloc(cell, sizeof(*sampler));
-            sampler->opcode = CELL_CMD_STATE_SAMPLER;
-            sampler->unit = i;
-            sampler->state = *cell->sampler[i];
+         if (cell->dirty_samplers & (1 << i)) {
+            if (cell->sampler[i]) {
+               struct cell_command_sampler *sampler
+                  = cell_batch_alloc(cell, sizeof(*sampler));
+               sampler->opcode = CELL_CMD_STATE_SAMPLER;
+               sampler->unit = i;
+               sampler->state = *cell->sampler[i];
+            }
          }
       }
+      cell->dirty_samplers = 0x0;
    }
 
    if (cell->dirty & CELL_NEW_TEXTURE) {
       uint i;
       for (i = 0;i < CELL_MAX_SAMPLERS; i++) {
-         struct cell_command_texture *texture
-            =  cell_batch_alloc(cell, sizeof(*texture));
-         texture->opcode = CELL_CMD_STATE_TEXTURE;
-         texture->unit = i;
-         if (cell->texture[i]) {
-            uint level;
-            for (level = 0; level < CELL_MAX_TEXTURE_LEVELS; level++) {
-               texture->start[level] = cell->texture[i]->tiled_data[level];
-               texture->width[level] = cell->texture[i]->base.width[level];
-               texture->height[level] = cell->texture[i]->base.height[level];
-               texture->depth[level] = cell->texture[i]->base.depth[level];
+         if (cell->dirty_textures & (1 << i)) {
+            struct cell_command_texture *texture
+               =  cell_batch_alloc(cell, sizeof(*texture));
+            texture->opcode = CELL_CMD_STATE_TEXTURE;
+            texture->unit = i;
+            if (cell->texture[i]) {
+               uint level;
+               for (level = 0; level < CELL_MAX_TEXTURE_LEVELS; level++) {
+                  texture->start[level] = cell->texture[i]->tiled_data[level];
+                  texture->width[level] = cell->texture[i]->base.width[level];
+                  texture->height[level] = cell->texture[i]->base.height[level];
+                  texture->depth[level] = cell->texture[i]->base.depth[level];
+               }
+               texture->target = cell->texture[i]->base.target;
             }
-            texture->target = cell->texture[i]->base.target;
-         }
-         else {
-            uint level;
-            for (level = 0; level < CELL_MAX_TEXTURE_LEVELS; level++) {
-               texture->start[level] = NULL;
-               texture->width[level] = 0;
-               texture->height[level] = 0;
-               texture->depth[level] = 0;
+            else {
+               uint level;
+               for (level = 0; level < CELL_MAX_TEXTURE_LEVELS; level++) {
+                  texture->start[level] = NULL;
+                  texture->width[level] = 0;
+                  texture->height[level] = 0;
+                  texture->depth[level] = 0;
+               }
+               texture->target = 0;
             }
-            texture->target = 0;
          }
       }
+      cell->dirty_textures = 0x0;
    }
 
    if (cell->dirty & CELL_NEW_VERTEX_INFO) {