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author | Ben Widawsky <benjamin.widawsky@intel.com> | 2015-07-30 14:31:20 -0700 |
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committer | Kenneth Graunke <kenneth@whitecape.org> | 2016-02-17 12:34:23 -0800 |
commit | 2bf041d94f23f501eddb998fb5a53068a24caa5d (patch) | |
tree | 131b0f6db877b4151ea292c38e6f6885e08b508e /src/mesa/drivers/dri/i965/gen6_vs_state.c | |
parent | 0e9dc59a58e632979b3bdebb19d184bd22a0c182 (diff) | |
download | external_mesa3d-2bf041d94f23f501eddb998fb5a53068a24caa5d.zip external_mesa3d-2bf041d94f23f501eddb998fb5a53068a24caa5d.tar.gz external_mesa3d-2bf041d94f23f501eddb998fb5a53068a24caa5d.tar.bz2 |
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>
Diffstat (limited to 'src/mesa/drivers/dri/i965/gen6_vs_state.c')
-rw-r--r-- | src/mesa/drivers/dri/i965/gen6_vs_state.c | 89 |
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) { |