i965: fix fetching constants from constant buffer in glsl path

the driver used to overwrite grf0 then use implicit move by send instruction
to move contents of grf0 to mrf1. However, we must not overwrite grf0 since
it's still used later for fb write.
Instead, do the move directly do mrf1 (we could use implicit move from another
grf reg to mrf1 but since we need a mov to encode the data anyway it doesn't
seem to make sense).
I think the dp_READ/WRITE_16 functions may suffer from the same issue.
While here also remove unnecessary msg_reg_nr parameter from the dataport
functions since always message register 1 is used.

1 files changed, 0 insertions, 2 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_wm_emit.c b/src/mesa/drivers/dri/i965/brw_wm_emit.c
index 14ab9042de..4c3879f9fa 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_emit.c
@@ -1057,7 +1057,6 @@ static void emit_spill( struct brw_wm_compile *c,
    */
    brw_dp_WRITE_16(p, 
 		   retype(vec16(brw_vec8_grf(0, 0)), BRW_REGISTER_TYPE_UW),
-		   1, 
 		   slot);
 }
 
@@ -1085,7 +1084,6 @@ static void emit_unspill( struct brw_wm_compile *c,
 
    brw_dp_READ_16(p,
 		  retype(vec16(reg), BRW_REGISTER_TYPE_UW),
-		  1,
 		  slot);
 }