[Mesa-dev] [PATCH] i965/fs: Remove bogus field prog_data->dispatch_width.

[Paul Berry]

Despite the name, this field wasn't being set to the dispatch width at
all; it was always 8.  The only place it was used was that the
constant buffer read length was aligned to it, and as far as I can
tell from the docs, there is no need to align this value to the
dispatch width; aligning it to a multiple of 8 is sufficient.  So I've
just replaced it with a hardcoded 8.
---
 src/mesa/drivers/dri/i965/brw_context.h   | 1 -
 src/mesa/drivers/dri/i965/brw_fs.cpp      | 2 --
 src/mesa/drivers/dri/i965/gen6_wm_state.c | 6 ++----
 3 files changed, 2 insertions(+), 7 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h
index c6e6655..490216c 100644
--- a/src/mesa/drivers/dri/i965/brw_context.h
+++ b/src/mesa/drivers/dri/i965/brw_context.h
@@ -328,7 +328,6 @@ struct brw_wm_prog_data {
    GLuint nr_params;       /**< number of float params/constants */
    GLuint nr_pull_params;
    bool dual_src_blend;
-   int dispatch_width;
    uint32_t prog_offset_16;
 
    /**
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index 0238336..4d12f7a 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -3147,8 +3147,6 @@ brw_wm_fs_emit(struct brw_context *brw, struct brw_wm_compile *c,
       }
    }
 
-   c->prog_data.dispatch_width = 8;
-
    fs_generator g(brw, c, prog, fp, v.dual_src_output.file != BAD_FILE);
    const unsigned *generated = g.generate_assembly(&v.instructions,
                                                    simd16_instructions,
diff --git a/src/mesa/drivers/dri/i965/gen6_wm_state.c b/src/mesa/drivers/dri/i965/gen6_wm_state.c
index c96a107..cccb107 100644
--- a/src/mesa/drivers/dri/i965/gen6_wm_state.c
+++ b/src/mesa/drivers/dri/i965/gen6_wm_state.c
@@ -78,8 +78,7 @@ gen6_upload_wm_push_constants(struct brw_context *brw)
 	 printf("\n");
       }
 
-      brw->wm.base.push_const_size =
-         ALIGN(prog_data->nr_params, prog_data->dispatch_width) / 8;
+      brw->wm.base.push_const_size = ALIGN(prog_data->nr_params, 8) / 8;
    }
 }
 
@@ -123,8 +122,7 @@ upload_wm_state(struct brw_context *brw)
        * state flags from gen6_upload_wm_push_constants.
        */
       OUT_BATCH(brw->wm.base.push_const_offset +
-		ALIGN(brw->wm.prog_data->nr_params,
-		      brw->wm.prog_data->dispatch_width) / 8 - 1);
+		ALIGN(brw->wm.prog_data->nr_params, 8) / 8 - 1);
       OUT_BATCH(0);
       OUT_BATCH(0);
       OUT_BATCH(0);
-- 
1.8.4