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-rw-r--r--src/mesa/drivers/dri/i965/brw_fs.cpp9
1 files changed, 7 insertions, 2 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index c3cbe0df618..4eead32cbbd 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -474,8 +474,13 @@ fs_visitor::emit_fragcoord_interpolation(ir_variable *ir)
wpos.reg_offset++;
/* gl_FragCoord.z */
- emit(fs_inst(FS_OPCODE_LINTERP, wpos, this->delta_x, this->delta_y,
- interp_reg(FRAG_ATTRIB_WPOS, 2)));
+ if (intel->gen >= 6) {
+ emit(fs_inst(BRW_OPCODE_MOV, wpos,
+ fs_reg(brw_vec8_grf(c->source_depth_reg, 0))));
+ } else {
+ emit(fs_inst(FS_OPCODE_LINTERP, wpos, this->delta_x, this->delta_y,
+ interp_reg(FRAG_ATTRIB_WPOS, 2)));
+ }
wpos.reg_offset++;
/* gl_FragCoord.w: Already set up in emit_interpolation */