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intel/fs: Use the ATTR file for FS inputs

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This replaces the special magic opcodes which implicitly read inputs
with explicit use of the ATTR file.

v2 (Jason Ekstrand):
 - Break into multiple patches
 - Change the units of the FS ATTR to be in logical scalars

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Francisco Jerez
2016-04-25 18:33:22 -07:00
committed by Jason Ekstrand
parent 4bfa2ac2ea
commit 39de901a96
4 changed files with 30 additions and 22 deletions
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10
src/intel/compiler/brw_fs_visitor.cpp
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@@ -135,17 +135,15 @@ fs_visitor::emit_dummy_fs()
* data. It will get adjusted to be a real location before
* generate_code() time.
*/
struct brw_reg
fs_reg
fs_visitor::interp_reg(int location, int channel)
{
assert(stage == MESA_SHADER_FRAGMENT);
struct brw_wm_prog_data *prog_data = brw_wm_prog_data(this->prog_data);
int regnr = prog_data->urb_setup[location] * 2 + channel / 2;
int stride = (channel & 1) * 4;
int regnr = prog_data->urb_setup[location] * 4 + channel;
assert(prog_data->urb_setup[location] != -1);
return brw_vec1_grf(regnr, stride);
return fs_reg(ATTR, regnr, BRW_REGISTER_TYPE_F);
}
/** Emits the interpolation for the varying inputs. */
@@ -192,7 +190,7 @@ fs_visitor::emit_interpolation_setup_gen4()
*/
this->wpos_w = vgrf(glsl_type::float_type);
abld.emit(FS_OPCODE_LINTERP, wpos_w, delta_xy,
interp_reg(VARYING_SLOT_POS, 3));
component(interp_reg(VARYING_SLOT_POS, 3), 0));
/* Compute the pixel 1/W value from wpos.w. */
this->pixel_w = vgrf(glsl_type::float_type);
abld.emit(SHADER_OPCODE_RCP, this->pixel_w, wpos_w);