From f35dea05b1329b9303a11fb803897fb189ff99b4 Mon Sep 17 00:00:00 2001 From: Chris Forbes Date: Tue, 27 Aug 2013 19:35:49 +1200 Subject: [PATCH] i965/fs: Gen4: Zero out extra coordinates when using shadow compare Fixes broken rendering if these MRFs contained anything other than zero. NOTE: This is a candidate for stable branches. Signed-off-by: Chris Forbes Reviewed-by: Kenneth Graunke --- src/mesa/drivers/dri/i965/brw_fs_visitor.cpp | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp index b0494364a1d..1e01d39d8b4 100644 --- a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp @@ -876,7 +876,13 @@ fs_visitor::emit_texture_gen4(ir_texture *ir, fs_reg dst, fs_reg coordinate, emit(MOV(fs_reg(MRF, base_mrf + mlen + i), coordinate)); coordinate.reg_offset++; } - /* gen4's SIMD8 sampler always has the slots for u,v,r present. */ + + /* gen4's SIMD8 sampler always has the slots for u,v,r present. + * the unused slots must be zeroed. + */ + for (int i = ir->coordinate->type->vector_elements; i < 3; i++) { + emit(MOV(fs_reg(MRF, base_mrf + mlen + i), fs_reg(0.0f))); + } mlen += 3; if (ir->op == ir_tex) { -- 2.30.2