LINTERP's src0 is PLN's src1, and PLN's src1 reads exec_size / 4
registers.
Having that information lets us drop the delta_x/y special case code in
split_virtual_grfs().
---
src/mesa/drivers/dri/i965/brw_fs.cpp | 13 ++-----------
1 file changed, 2 insertions(+), 11 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp
b/src/mesa/drivers/dri/i965/brw_fs.cpp
index 5c475b2..5ab8701 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -947,6 +947,8 @@ fs_inst::regs_read(int arg) const
return mlen;
} else if (opcode == FS_OPCODE_INTERPOLATE_AT_PER_SLOT_OFFSET && arg == 0) {
return mlen;
+ } else if (opcode == FS_OPCODE_LINTERP && arg == 0) {
+ return exec_size / 4;
}
switch (src[arg].file) {
@@ -1976,17 +1978,6 @@ fs_visitor::split_virtual_grfs()
}
}
- if (brw->has_pln &&
- this->delta_x[BRW_WM_PERSPECTIVE_PIXEL_BARYCENTRIC].file == GRF) {
- /* PLN opcodes rely on the delta_xy being contiguous. We only have to
- * check this for BRW_WM_PERSPECTIVE_PIXEL_BARYCENTRIC, because prior to
- * Gen6, that was the only supported interpolation mode, and since Gen6,
- * delta_x and delta_y are in fixed hardware registers.
- */
- int vgrf = this->delta_x[BRW_WM_PERSPECTIVE_PIXEL_BARYCENTRIC].reg;
- split_points[vgrf_to_reg[vgrf] + 1] = false;
- }
-
foreach_block_and_inst(block, fs_inst, inst, cfg) {
if (inst->dst.file == GRF) {
int reg = vgrf_to_reg[inst->dst.reg] + inst->dst.reg_offset;
--
2.0.5
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