cell: allocate batch buffers w/ 16-byte alignment

Replace cell_batch{align,alloc)*() with cell_batch_alloc16(), allocating
multiples of 16 bytes that are 16 byte aligned.

Opcodes are stored in preferred slot of SPU machine word.

Various structures are explicitly padded to 16 byte multiples.

Added STATIC_ASSERT().

1 files changed, 3 insertions, 2 deletions

diff --git a/src/gallium/drivers/cell/ppu/cell_clear.c b/src/gallium/drivers/cell/ppu/cell_clear.c
index 037635e466..c2e276988c 100644
--- a/src/gallium/drivers/cell/ppu/cell_clear.c
+++ b/src/gallium/drivers/cell/ppu/cell_clear.c
@@ -99,10 +99,11 @@ cell_clear_surface(struct pipe_context *pipe, struct pipe_surface *ps,
 
    /* Build a CLEAR command and place it in the current batch buffer */
    {
+      STATIC_ASSERT(sizeof(struct cell_command_clear_surface) % 16 == 0);
       struct cell_command_clear_surface *clr
          = (struct cell_command_clear_surface *)
-         cell_batch_alloc(cell, sizeof(*clr));
-      clr->opcode = CELL_CMD_CLEAR_SURFACE;
+         cell_batch_alloc16(cell, sizeof(*clr));
+      clr->opcode[0] = CELL_CMD_CLEAR_SURFACE;
       clr->surface = surfIndex;
       clr->value = clearValue;
    }