i965: Extract push constant state to a new file

Every stage has a corresponding 3DSTATE_CONSTANT_XS packet, so having
the code to create and emit push constant buffers in genX_vs_state.c
is a little strange.  Moving it to a separate file seems more logical.

v2 [Ken]: Rebase on master, explain motivation in the commit message.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

1 files changed, 0 insertions, 89 deletions

diff --git a/src/mesa/drivers/dri/i965/gen6_vs_state.c b/src/mesa/drivers/dri/i965/gen6_vs_state.c
index 4bc0a85..c18610c 100644
--- a/src/mesa/drivers/dri/i965/gen6_vs_state.c
+++ b/src/mesa/drivers/dri/i965/gen6_vs_state.c
@@ -33,95 +33,6 @@
 #include "program/prog_statevars.h"
 #include "intel_batchbuffer.h"
 
-/**
- * Creates a streamed BO containing the push constants for the VS or GS on
- * gen6+.
- *
- * Push constants are constant values (such as GLSL uniforms) that are
- * pre-loaded into a shader stage's register space at thread spawn time.
- *
- * Not all GLSL uniforms will be uploaded as push constants: The hardware has
- * a limitation of 32 or 64 EU registers (256 or 512 floats) per stage to be
- * uploaded as push constants, while GL 4.4 requires at least 1024 components
- * to be usable for the VS.  Plus, currently we always use pull constants
- * instead of push constants when doing variable-index array access.
- *
- * See brw_curbe.c for the equivalent gen4/5 code.
- */
-void
-gen6_upload_push_constants(struct brw_context *brw,
-                           const struct gl_program *prog,
-                           const struct brw_stage_prog_data *prog_data,
-                           struct brw_stage_state *stage_state,
-                           enum aub_state_struct_type type)
-{
-   struct gl_context *ctx = &brw->ctx;
-
-   if (prog_data->nr_params == 0) {
-      stage_state->push_const_size = 0;
-   } else {
-      /* Updates the ParamaterValues[i] pointers for all parameters of the
-       * basic type of PROGRAM_STATE_VAR.
-       */
-      /* XXX: Should this happen somewhere before to get our state flag set? */
-      if (prog)
-         _mesa_load_state_parameters(ctx, prog->Parameters);
-
-      gl_constant_value *param;
-      unsigned i;
-
-      param = brw_state_batch(brw, type,
-			      prog_data->nr_params * sizeof(gl_constant_value),
-			      32, &stage_state->push_const_offset);
-
-      STATIC_ASSERT(sizeof(gl_constant_value) == sizeof(float));
-
-      /* _NEW_PROGRAM_CONSTANTS
-       *
-       * Also _NEW_TRANSFORM -- we may reference clip planes other than as a
-       * side effect of dereferencing uniforms, so _NEW_PROGRAM_CONSTANTS
-       * wouldn't be set for them.
-      */
-      for (i = 0; i < prog_data->nr_params; i++) {
-         param[i] = *prog_data->param[i];
-      }
-
-      if (0) {
-	 fprintf(stderr, "%s constants:\n",
-                 _mesa_shader_stage_to_string(stage_state->stage));
-	 for (i = 0; i < prog_data->nr_params; i++) {
-	    if ((i & 7) == 0)
-	       fprintf(stderr, "g%d: ",
-                       prog_data->dispatch_grf_start_reg + i / 8);
-	    fprintf(stderr, "%8f ", param[i].f);
-	    if ((i & 7) == 7)
-	       fprintf(stderr, "\n");
-	 }
-	 if ((i & 7) != 0)
-	    fprintf(stderr, "\n");
-	 fprintf(stderr, "\n");
-      }
-
-      stage_state->push_const_size = ALIGN(prog_data->nr_params, 8) / 8;
-      /* We can only push 32 registers of constants at a time. */
-
-      /* From the SNB PRM (vol2, part 1, section 3.2.1.4: 3DSTATE_CONSTANT_VS:
-       *
-       *     "The sum of all four read length fields (each incremented to
-       *      represent the actual read length) must be less than or equal to
-       *      32"
-       *
-       * From the IVB PRM (vol2, part 1, section 3.2.1.3: 3DSTATE_CONSTANT_VS:
-       *
-       *     "The sum of all four read length fields must be less than or
-       *      equal to the size of 64"
-       *
-       * The other shader stages all match the VS's limits.
-       */
-      assert(stage_state->push_const_size <= 32);
-   }
-}
-
 static void
 gen6_upload_vs_push_constants(struct brw_context *brw)
 {