i965/fs: Set default access mode to Align1 for all instructions in the generator.

Currently the generator code for most opcodes honours the default
access mode (which should typically be Align1 in the scalar back-end),
but generate_code() doesn't set it explicitly which means that the
access mode from a previous instruction could leak into the following
ones if you did something special and weren't careful enough to save
and restore the previous access mode.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

diff --git a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp b/src/mesa/drivers/dri/i965/brw_fs_generator.cpp
index 9d1589cca7b18b2fea6b01f421d7e624cab27b65..a3cb4c0cc1d9dc577d9444da7e20d9f146c786a2 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_generator.cpp
@@ -1697,6 +1697,7 @@ fs_generator::generate_code(const cfg_t *cfg, int dispatch_width)
       }
       dst = brw_reg_from_fs_reg(p, inst, &inst->dst, devinfo->gen);
 
+      brw_set_default_access_mode(p, BRW_ALIGN_1);
       brw_set_default_predicate_control(p, inst->predicate);
       brw_set_default_predicate_inverse(p, inst->predicate_inverse);
       brw_set_default_flag_reg(p, 0, inst->flag_subreg);