i965: Write gl_FragCoord directly to the destination.

This patch makes emit_general_interpolation take a destination register
as an argument, and write directly to that.  This is simpler than the
old approach of ralloc'ing a register, writing to that temporary, and
then making the caller emit per-component MOVs to copy it to the actual
destination.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Timothy Arceri <timothy.arceri@collabora.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
index ccf0d09..898f23a 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
@@ -62,9 +62,7 @@ fs_visitor::nir_setup_inputs()
 
       fs_reg reg;
       if (var->data.location == VARYING_SLOT_POS) {
-         reg = *emit_fragcoord_interpolation();
-         emit_percomp(bld, fs_inst(BRW_OPCODE_MOV, bld.dispatch_width(),
-                                   input, reg), 0xF);
+         emit_fragcoord_interpolation(input);
       } else if (var->data.location == VARYING_SLOT_LAYER) {
          struct brw_reg reg = suboffset(interp_reg(VARYING_SLOT_LAYER, 1), 3);
          reg.type = BRW_REGISTER_TYPE_D;