[Mesa-dev] [PATCH 63/78] i965/nir/vec4: Implement loading of nir_tex_src_comparitor

[Eduardo Lima Mitev]

From: Alejandro Piñeiro <apinheiro at igalia.com>

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89580
---
 src/mesa/drivers/dri/i965/brw_vec4_nir.cpp | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp b/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
index c3638a0..47e70ce 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
@@ -1417,13 +1417,18 @@ vec4_visitor::nir_emit_texture(nir_tex_instr *instr)
 
    const glsl_type *dest_type;
 
+   src_reg shadow_comparitor;
+   int shadow_compare = 0;
+
    /* Load the texture operation sources */
    for (unsigned i = 0; i < instr->num_srcs; i++) {
       src_reg src = get_nir_src(instr->src[i].src);
 
       switch (instr->src[i].src_type) {
       case nir_tex_src_comparitor:
-         /* @TODO: not yet implemented */
+         shadow_comparitor = retype(src, BRW_REGISTER_TYPE_F);
+         shadow_comparitor.swizzle = BRW_SWIZZLE_XXXX;
+         shadow_compare = 1;
          break;
 
       case nir_tex_src_coord:
@@ -1497,6 +1502,7 @@ vec4_visitor::nir_emit_texture(nir_tex_instr *instr)
    inst->base_mrf = 2;
    inst->mlen = inst->header_size + 1;
    inst->dst.writemask = WRITEMASK_XYZW;
+   inst->shadow_compare = shadow_compare;
 
    inst->src[1] = sampler_reg;
 
@@ -1508,7 +1514,13 @@ vec4_visitor::nir_emit_texture(nir_tex_instr *instr)
    } else {
       /* @TODO: Load the coordinate */
 
-      /* @TODO: Load the shadow comparitor */
+      /* Load the shadow comparitor */
+      if (shadow_compare && instr->op != nir_texop_txd) {
+         emit(MOV(dst_reg(MRF, param_base + 1, shadow_comparitor.type,
+                          WRITEMASK_X),
+                  shadow_comparitor));
+         inst->mlen++;
+      }
 
       /* Load the LOD info */
       if (instr->op == nir_texop_tex || instr->op == nir_texop_txl) {
-- 
2.1.4