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i965: Add gen6 attribute interpolation to new FS backend. 

Untested, since my hardware is not booting at the moment.
This commit is contained in:
Eric Anholt 2010-10-01 10:45:26 -07:00
parent 29b491bd03
commit efc4a6f790
1 changed files with 39 additions and 3 deletions
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42
src/mesa/drivers/dri/i965/brw_fs.cpp
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@ -468,7 +468,8 @@ public:
void emit_dummy_fs();
void emit_fragcoord_interpolation(ir_variable *ir);
void emit_general_interpolation(ir_variable *ir);
void emit_interpolation_setup();
void emit_interpolation_setup_gen4();
void emit_interpolation_setup_gen6();
fs_inst *emit_texture_gen4(ir_texture *ir, fs_reg dst, int base_mrf);
fs_inst *emit_texture_gen5(ir_texture *ir, fs_reg dst, int base_mrf);
void emit_fb_writes();
@ -1662,7 +1663,7 @@ fs_visitor::interp_reg(int location, int channel)
/** Emits the interpolation for the varying inputs. */
void
fs_visitor::emit_interpolation_setup()
fs_visitor::emit_interpolation_setup_gen4()
{
struct brw_reg g1_uw = retype(brw_vec1_grf(1, 0), BRW_REGISTER_TYPE_UW);
@ -1705,6 +1706,38 @@ fs_visitor::emit_interpolation_setup()
this->current_annotation = NULL;
}
/** Emits the interpolation for the varying inputs. */
void
fs_visitor::emit_interpolation_setup_gen6()
{
struct brw_reg g1_uw = retype(brw_vec1_grf(1, 0), BRW_REGISTER_TYPE_UW);
/* If the pixel centers end up used, the setup is the same as for gen4. */
this->current_annotation = "compute pixel centers";
this->pixel_x = fs_reg(this, glsl_type::uint_type);
this->pixel_y = fs_reg(this, glsl_type::uint_type);
this->pixel_x.type = BRW_REGISTER_TYPE_UW;
this->pixel_y.type = BRW_REGISTER_TYPE_UW;
emit(fs_inst(BRW_OPCODE_ADD,
this->pixel_x,
fs_reg(stride(suboffset(g1_uw, 4), 2, 4, 0)),
fs_reg(brw_imm_v(0x10101010))));
emit(fs_inst(BRW_OPCODE_ADD,
this->pixel_y,
fs_reg(stride(suboffset(g1_uw, 5), 2, 4, 0)),
fs_reg(brw_imm_v(0x11001100))));
this->current_annotation = "compute 1/pos.w";
this->wpos_w = fs_reg(brw_vec8_grf(c->key.source_w_reg, 0));
this->pixel_w = fs_reg(this, glsl_type::float_type);
emit(fs_inst(FS_OPCODE_RCP, this->pixel_w, wpos_w));
this->delta_x = fs_reg(brw_vec8_grf(2, 0));
this->delta_y = fs_reg(brw_vec8_grf(3, 0));
this->current_annotation = NULL;
}
void
fs_visitor::emit_fb_writes()
{
@ -2614,7 +2647,10 @@ brw_wm_fs_emit(struct brw_context *brw, struct brw_wm_compile *c)
if (0) {
v.emit_dummy_fs();
} else {
v.emit_interpolation_setup();
if (intel->gen < 6)
v.emit_interpolation_setup_gen4();
else
v.emit_interpolation_setup_gen6();
/* Generate FS IR for main(). (the visitor only descends into
* functions called "main").